diff mbox series

[PULL,22/25] target/i386: kvm: Add nested migration blocker only when kernel lacks required capabilities

Message ID 1561116620-22245-23-git-send-email-pbonzini@redhat.com
State New
Headers show
Series [PULL,01/25] kvm-all: Add/update fprintf's for kvm_*_ioeventfd_del | expand

Commit Message

Paolo Bonzini June 21, 2019, 11:30 a.m. UTC
From: Liran Alon <liran.alon@oracle.com>

Previous commits have added support for migration of nested virtualization
workloads. This was done by utilising two new KVM capabilities:
KVM_CAP_NESTED_STATE and KVM_CAP_EXCEPTION_PAYLOAD. Both which are
required in order to correctly migrate such workloads.

Therefore, change code to add a migration blocker for vCPUs exposed with
Intel VMX or AMD SVM in case one of these kernel capabilities is
missing.

Signed-off-by: Liran Alon <liran.alon@oracle.com>
Reviewed-by: Maran Wilson <maran.wilson@oracle.com>
Message-Id: <20190619162140.133674-11-liran.alon@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/kvm.c     | 9 +++++++--
 target/i386/machine.c | 2 +-
 2 files changed, 8 insertions(+), 3 deletions(-)

Comments

Liran Alon June 21, 2019, 12:39 p.m. UTC | #1
> On 21 Jun 2019, at 14:30, Paolo Bonzini <pbonzini@redhat.com> wrote:
> 
> From: Liran Alon <liran.alon@oracle.com>
> 
> Previous commits have added support for migration of nested virtualization
> workloads. This was done by utilising two new KVM capabilities:
> KVM_CAP_NESTED_STATE and KVM_CAP_EXCEPTION_PAYLOAD. Both which are
> required in order to correctly migrate such workloads.
> 
> Therefore, change code to add a migration blocker for vCPUs exposed with
> Intel VMX or AMD SVM in case one of these kernel capabilities is
> missing.
> 
> Signed-off-by: Liran Alon <liran.alon@oracle.com>
> Reviewed-by: Maran Wilson <maran.wilson@oracle.com>
> Message-Id: <20190619162140.133674-11-liran.alon@oracle.com>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
> target/i386/kvm.c     | 9 +++++++--
> target/i386/machine.c | 2 +-
> 2 files changed, 8 insertions(+), 3 deletions(-)
> 
> diff --git a/target/i386/kvm.c b/target/i386/kvm.c
> index c931e9d..e4b4f57 100644
> --- a/target/i386/kvm.c
> +++ b/target/i386/kvm.c
> @@ -1640,9 +1640,14 @@ int kvm_arch_init_vcpu(CPUState *cs)
>                                   !!(c->ecx & CPUID_EXT_SMX);
>     }
> 
> -    if (cpu_has_nested_virt(env) && !nested_virt_mig_blocker) {
> +    if (cpu_has_vmx(env) && !nested_virt_mig_blocker &&

The change here from cpu_has_nested_virt(env) to cpu_has_vmx(env) is not clear.
We should explicitly explain that it’s because we still wish to preserve backwards-compatability
to migrating AMD vCPU exposed with SVM.

In addition, commit ("target/i386: kvm: Block migration for vCPUs exposed with nested virtualization")
doesn’t make sense in case we still want to allow migrating AMD vCPU exposed with SVM.

Since QEMU commit 75d373ef9729 ("target-i386: Disable SVM by default in KVM mode"),
machine-types since v2.2 don’t expose AMD SVM by default.
Therefore, my personal opinion on this is that it’s fine to block migration in this case.

> +        ((kvm_max_nested_state_length() <= 0) || !has_exception_payload)) {
>         error_setg(&nested_virt_mig_blocker,
> -                   "Nested virtualization does not support live migration yet");
> +                   "Kernel do not provide required capabilities for “

As Maran have noted, we should change this “do not” to “does not”.
Sorry for my bad English grammer. :)

> +                   "nested virtualization migration. "
> +                   "(CAP_NESTED_STATE=%d, CAP_EXCEPTION_PAYLOAD=%d)",
> +                   kvm_max_nested_state_length() > 0,
> +                   has_exception_payload);
>         r = migrate_add_blocker(nested_virt_mig_blocker, &local_err);
>         if (local_err) {
>             error_report_err(local_err);
> diff --git a/target/i386/machine.c b/target/i386/machine.c
> index fc49e5a..851b249 100644
> --- a/target/i386/machine.c
> +++ b/target/i386/machine.c
> @@ -233,7 +233,7 @@ static int cpu_pre_save(void *opaque)
> 
> #ifdef CONFIG_KVM
>     /* Verify we have nested virtualization state from kernel if required */
> -    if (cpu_has_nested_virt(env) && !env->nested_state) {
> +    if (kvm_enabled() && cpu_has_vmx(env) && !env->nested_state) {

Good catch regarding adding kvm_enabled() here.
But I think this should have been added to commit ("target/i386: kvm: Add support for save and restore nested state”).

-Liran

>         error_report("Guest enabled nested virtualization but kernel "
>                 "does not support saving of nested state");
>         return -EINVAL;
> -- 
> 1.8.3.1
> 
>
Paolo Bonzini June 21, 2019, 3:02 p.m. UTC | #2
On 21/06/19 14:39, Liran Alon wrote:
>> On 21 Jun 2019, at 14:30, Paolo Bonzini <pbonzini@redhat.com> wrote:
>>
>> From: Liran Alon <liran.alon@oracle.com>
>>
>> Previous commits have added support for migration of nested virtualization
>> workloads. This was done by utilising two new KVM capabilities:
>> KVM_CAP_NESTED_STATE and KVM_CAP_EXCEPTION_PAYLOAD. Both which are
>> required in order to correctly migrate such workloads.
>>
>> Therefore, change code to add a migration blocker for vCPUs exposed with
>> Intel VMX or AMD SVM in case one of these kernel capabilities is
>> missing.
>>
>> Signed-off-by: Liran Alon <liran.alon@oracle.com>
>> Reviewed-by: Maran Wilson <maran.wilson@oracle.com>
>> Message-Id: <20190619162140.133674-11-liran.alon@oracle.com>
>> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
>> ---
>> target/i386/kvm.c     | 9 +++++++--
>> target/i386/machine.c | 2 +-
>> 2 files changed, 8 insertions(+), 3 deletions(-)
>>
>> diff --git a/target/i386/kvm.c b/target/i386/kvm.c
>> index c931e9d..e4b4f57 100644
>> --- a/target/i386/kvm.c
>> +++ b/target/i386/kvm.c
>> @@ -1640,9 +1640,14 @@ int kvm_arch_init_vcpu(CPUState *cs)
>>                                   !!(c->ecx & CPUID_EXT_SMX);
>>     }
>>
>> -    if (cpu_has_nested_virt(env) && !nested_virt_mig_blocker) {
>> +    if (cpu_has_vmx(env) && !nested_virt_mig_blocker &&
> 
> The change here from cpu_has_nested_virt(env) to cpu_has_vmx(env) is not clear.
> We should explicitly explain that it’s because we still wish to preserve backwards-compatability
> to migrating AMD vCPU exposed with SVM.
> 
> In addition, commit ("target/i386: kvm: Block migration for vCPUs exposed with nested virtualization")
> doesn’t make sense in case we still want to allow migrating AMD vCPU exposed with SVM.
> 
> Since QEMU commit 75d373ef9729 ("target-i386: Disable SVM by default in KVM mode"),
> machine-types since v2.2 don’t expose AMD SVM by default.
> Therefore, my personal opinion on this is that it’s fine to block migration in this case.

I totally missed that commit.  My bad.

Actually, now that I think about it SVM *will* have some state while
running in guest mode, namely:

- the NPT page table root

- the L1 CR4.PAE, EFER.LMA and EFER.NXE bits, which determine the format
of the NPT12 page tables

These are covered by the existing vmstate_svm_npt subsection.

On the other hand, the lack of something like VMXON/VMCS12 state means
that AMD already sorta works unless you're migrating while in guest
mode.  For Intel, just execute VMXON before migration, and starting any
VM after migration is doomed.

So, overall I prefer not to block migration.

>> +        ((kvm_max_nested_state_length() <= 0) || !has_exception_payload)) {
>>         error_setg(&nested_virt_mig_blocker,
>> -                   "Nested virtualization does not support live migration yet");
>> +                   "Kernel do not provide required capabilities for “
> 
> As Maran have noted, we should change this “do not” to “does not”.
> Sorry for my bad English grammer. :)
> 
>> +                   "nested virtualization migration. "
>> +                   "(CAP_NESTED_STATE=%d, CAP_EXCEPTION_PAYLOAD=%d)",
>> +                   kvm_max_nested_state_length() > 0,
>> +                   has_exception_payload);
>>         r = migrate_add_blocker(nested_virt_mig_blocker, &local_err);
>>         if (local_err) {
>>             error_report_err(local_err);
>> diff --git a/target/i386/machine.c b/target/i386/machine.c
>> index fc49e5a..851b249 100644
>> --- a/target/i386/machine.c
>> +++ b/target/i386/machine.c
>> @@ -233,7 +233,7 @@ static int cpu_pre_save(void *opaque)
>>
>> #ifdef CONFIG_KVM
>>     /* Verify we have nested virtualization state from kernel if required */
>> -    if (cpu_has_nested_virt(env) && !env->nested_state) {
>> +    if (kvm_enabled() && cpu_has_vmx(env) && !env->nested_state) {
> 
> Good catch regarding adding kvm_enabled() here.

Caught by "make check", not by me!

> But I think this should have been added to commit ("target/i386: kvm: Add support for save and restore nested state”).

This commit is where bisection broke. :)

Paolo
Liran Alon June 21, 2019, 3:07 p.m. UTC | #3
> On 21 Jun 2019, at 18:02, Paolo Bonzini <pbonzini@redhat.com> wrote:
> 
> On 21/06/19 14:39, Liran Alon wrote:
>>> On 21 Jun 2019, at 14:30, Paolo Bonzini <pbonzini@redhat.com> wrote:
>>> 
>>> From: Liran Alon <liran.alon@oracle.com>
>>> 
>>> Previous commits have added support for migration of nested virtualization
>>> workloads. This was done by utilising two new KVM capabilities:
>>> KVM_CAP_NESTED_STATE and KVM_CAP_EXCEPTION_PAYLOAD. Both which are
>>> required in order to correctly migrate such workloads.
>>> 
>>> Therefore, change code to add a migration blocker for vCPUs exposed with
>>> Intel VMX or AMD SVM in case one of these kernel capabilities is
>>> missing.
>>> 
>>> Signed-off-by: Liran Alon <liran.alon@oracle.com>
>>> Reviewed-by: Maran Wilson <maran.wilson@oracle.com>
>>> Message-Id: <20190619162140.133674-11-liran.alon@oracle.com>
>>> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
>>> ---
>>> target/i386/kvm.c     | 9 +++++++--
>>> target/i386/machine.c | 2 +-
>>> 2 files changed, 8 insertions(+), 3 deletions(-)
>>> 
>>> diff --git a/target/i386/kvm.c b/target/i386/kvm.c
>>> index c931e9d..e4b4f57 100644
>>> --- a/target/i386/kvm.c
>>> +++ b/target/i386/kvm.c
>>> @@ -1640,9 +1640,14 @@ int kvm_arch_init_vcpu(CPUState *cs)
>>>                                  !!(c->ecx & CPUID_EXT_SMX);
>>>    }
>>> 
>>> -    if (cpu_has_nested_virt(env) && !nested_virt_mig_blocker) {
>>> +    if (cpu_has_vmx(env) && !nested_virt_mig_blocker &&
>> 
>> The change here from cpu_has_nested_virt(env) to cpu_has_vmx(env) is not clear.
>> We should explicitly explain that it’s because we still wish to preserve backwards-compatability
>> to migrating AMD vCPU exposed with SVM.
>> 
>> In addition, commit ("target/i386: kvm: Block migration for vCPUs exposed with nested virtualization")
>> doesn’t make sense in case we still want to allow migrating AMD vCPU exposed with SVM.
>> 
>> Since QEMU commit 75d373ef9729 ("target-i386: Disable SVM by default in KVM mode"),
>> machine-types since v2.2 don’t expose AMD SVM by default.
>> Therefore, my personal opinion on this is that it’s fine to block migration in this case.
> 
> I totally missed that commit.  My bad.
> 
> Actually, now that I think about it SVM *will* have some state while
> running in guest mode, namely:
> 
> - the NPT page table root
> 
> - the L1 CR4.PAE, EFER.LMA and EFER.NXE bits, which determine the format
> of the NPT12 page tables
> 
> These are covered by the existing vmstate_svm_npt subsection.
> 
> On the other hand, the lack of something like VMXON/VMCS12 state means
> that AMD already sorta works unless you're migrating while in guest
> mode.  For Intel, just execute VMXON before migration, and starting any
> VM after migration is doomed.

True.

> 
> So, overall I prefer not to block migration.

I’m not sure I agree.
It is quite likely that vCPU is currently in guest-mode while you are migrating…
A good hypervisor tries to maximise CPU time to be in guest-mode rather than host-mode. :)

I prefer to block migration and once we formally complete the implementation of SVM nested state,
we can modify QEMU code such that migration of vCPU exposed with SVM will work in case
nested-state states that guest is in host-mode.

> 
>>> +        ((kvm_max_nested_state_length() <= 0) || !has_exception_payload)) {
>>>        error_setg(&nested_virt_mig_blocker,
>>> -                   "Nested virtualization does not support live migration yet");
>>> +                   "Kernel do not provide required capabilities for “
>> 
>> As Maran have noted, we should change this “do not” to “does not”.
>> Sorry for my bad English grammer. :)
>> 
>>> +                   "nested virtualization migration. "
>>> +                   "(CAP_NESTED_STATE=%d, CAP_EXCEPTION_PAYLOAD=%d)",
>>> +                   kvm_max_nested_state_length() > 0,
>>> +                   has_exception_payload);
>>>        r = migrate_add_blocker(nested_virt_mig_blocker, &local_err);
>>>        if (local_err) {
>>>            error_report_err(local_err);
>>> diff --git a/target/i386/machine.c b/target/i386/machine.c
>>> index fc49e5a..851b249 100644
>>> --- a/target/i386/machine.c
>>> +++ b/target/i386/machine.c
>>> @@ -233,7 +233,7 @@ static int cpu_pre_save(void *opaque)
>>> 
>>> #ifdef CONFIG_KVM
>>>    /* Verify we have nested virtualization state from kernel if required */
>>> -    if (cpu_has_nested_virt(env) && !env->nested_state) {
>>> +    if (kvm_enabled() && cpu_has_vmx(env) && !env->nested_state) {
>> 
>> Good catch regarding adding kvm_enabled() here.
> 
> Caught by "make check", not by me!

Ah nice to know :) Thanks for the tip.

> 
>> But I think this should have been added to commit ("target/i386: kvm: Add support for save and restore nested state”).
> 
> This commit is where bisection broke. :)
> 
> Paolo
Paolo Bonzini June 21, 2019, 5:27 p.m. UTC | #4
On 21/06/19 17:07, Liran Alon wrote:
>> So, overall I prefer not to block migration.
> I’m not sure I agree.
> It is quite likely that vCPU is currently in guest-mode while you are migrating…
> A good hypervisor tries to maximise CPU time to be in guest-mode rather than host-mode. :)

True, but it is even more likely that they are not using KVM at all and
just happen to have the CPUID flag set. :)

Paolo
Liran Alon June 21, 2019, 5:54 p.m. UTC | #5
> On 21 Jun 2019, at 20:27, Paolo Bonzini <pbonzini@redhat.com> wrote:
> 
> On 21/06/19 17:07, Liran Alon wrote:
>>> So, overall I prefer not to block migration.
>> I’m not sure I agree.
>> It is quite likely that vCPU is currently in guest-mode while you are migrating…
>> A good hypervisor tries to maximise CPU time to be in guest-mode rather than host-mode. :)
> 
> True, but it is even more likely that they are not using KVM at all and
> just happen to have the CPUID flag set. :)
> 
> Paolo

Since QEMU commit 75d373ef9729 ("target-i386: Disable SVM by default in KVM mode"),
An AMD vCPU that is virtualized by KVM don’t expose SVM by default. Even if you use "-cpu host".
Therefore, it is unlikely that vCPU expose SVM CPUID flag when user is not running any nSVM
workload inside guest. Unless I’m missing something obvious.
Otherwise, I would have agreed with you.

-Liran
Jan Kiszka July 8, 2019, 6:31 p.m. UTC | #6
On 21.06.19 13:30, Paolo Bonzini wrote:
> From: Liran Alon <liran.alon@oracle.com>
> 
> Previous commits have added support for migration of nested virtualization
> workloads. This was done by utilising two new KVM capabilities:
> KVM_CAP_NESTED_STATE and KVM_CAP_EXCEPTION_PAYLOAD. Both which are
> required in order to correctly migrate such workloads.
> 
> Therefore, change code to add a migration blocker for vCPUs exposed with
> Intel VMX or AMD SVM in case one of these kernel capabilities is
> missing.
> 
> Signed-off-by: Liran Alon <liran.alon@oracle.com>
> Reviewed-by: Maran Wilson <maran.wilson@oracle.com>
> Message-Id: <20190619162140.133674-11-liran.alon@oracle.com>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
>  target/i386/kvm.c     | 9 +++++++--
>  target/i386/machine.c | 2 +-
>  2 files changed, 8 insertions(+), 3 deletions(-)
> 
> diff --git a/target/i386/kvm.c b/target/i386/kvm.c
> index c931e9d..e4b4f57 100644
> --- a/target/i386/kvm.c
> +++ b/target/i386/kvm.c
> @@ -1640,9 +1640,14 @@ int kvm_arch_init_vcpu(CPUState *cs)
>                                    !!(c->ecx & CPUID_EXT_SMX);
>      }
>  
> -    if (cpu_has_nested_virt(env) && !nested_virt_mig_blocker) {
> +    if (cpu_has_vmx(env) && !nested_virt_mig_blocker &&
> +        ((kvm_max_nested_state_length() <= 0) || !has_exception_payload)) {
>          error_setg(&nested_virt_mig_blocker,
> -                   "Nested virtualization does not support live migration yet");
> +                   "Kernel do not provide required capabilities for "
> +                   "nested virtualization migration. "
> +                   "(CAP_NESTED_STATE=%d, CAP_EXCEPTION_PAYLOAD=%d)",
> +                   kvm_max_nested_state_length() > 0,
> +                   has_exception_payload);
>          r = migrate_add_blocker(nested_virt_mig_blocker, &local_err);
>          if (local_err) {
>              error_report_err(local_err);
> diff --git a/target/i386/machine.c b/target/i386/machine.c
> index fc49e5a..851b249 100644
> --- a/target/i386/machine.c
> +++ b/target/i386/machine.c
> @@ -233,7 +233,7 @@ static int cpu_pre_save(void *opaque)
>  
>  #ifdef CONFIG_KVM
>      /* Verify we have nested virtualization state from kernel if required */
> -    if (cpu_has_nested_virt(env) && !env->nested_state) {
> +    if (kvm_enabled() && cpu_has_vmx(env) && !env->nested_state) {
>          error_report("Guest enabled nested virtualization but kernel "
>                  "does not support saving of nested state");
>          return -EINVAL;
> 

Starting with this commit latest (bisection issue...), running Jailhouse in a
guest first stalls L1 (looks like we lose interrupts), and if I try to reset
that VM, I lose my host as well:

kvm: vmptrld           (null)/6eb900000000 failed
kvm: vmclear fail:           (null)/6eb900000000

and then things start to lock up because we seem to lose the CPUs the guest was
running on. Once I had this in the logs:

rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 7-... } 15040
jiffies s: 4673 root: 0x80/.
rcu: blocking rcu_node structures:
Task dump for CPU 7:
qemu-system-x86 R  running task        0 17413  17345 0x00000008
Call Trace:
 ? x86_virt_spec_ctrl+0x7/0xe0
 ? vmx_vcpu_run.part.0+0x2a4/0xfa0 [kvm_intel]
 ? vcpu_enter_guest+0x349/0xe80 [kvm]
 ? kvm_arch_vcpu_ioctl_run+0xff/0x550 [kvm]
 ? kvm_vcpu_ioctl+0x20d/0x590 [kvm]
 ? get_futex_key+0x35d/0x3b0
 ? do_vfs_ioctl+0x447/0x640
 ? do_futex+0x157/0x1d0
 ? ksys_ioctl+0x5e/0x90
 ? __x64_sys_ioctl+0x16/0x20
 ? do_syscall_64+0x60/0x120
 ? entry_SYSCALL_64_after_hwframe+0x49/0xbe

This was on a 5.1.16 distro kernel. Currently rebuilding 5.2 vanilla.

Looks like we have up to two critical bugs here...

Jan
Jan Kiszka July 8, 2019, 6:51 p.m. UTC | #7
On 08.07.19 20:31, Jan Kiszka wrote:
> 
> On 21.06.19 13:30, Paolo Bonzini wrote:
>> From: Liran Alon <liran.alon@oracle.com>
>>
>> Previous commits have added support for migration of nested virtualization
>> workloads. This was done by utilising two new KVM capabilities:
>> KVM_CAP_NESTED_STATE and KVM_CAP_EXCEPTION_PAYLOAD. Both which are
>> required in order to correctly migrate such workloads.
>>
>> Therefore, change code to add a migration blocker for vCPUs exposed with
>> Intel VMX or AMD SVM in case one of these kernel capabilities is
>> missing.
>>
>> Signed-off-by: Liran Alon <liran.alon@oracle.com>
>> Reviewed-by: Maran Wilson <maran.wilson@oracle.com>
>> Message-Id: <20190619162140.133674-11-liran.alon@oracle.com>
>> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
>> ---
>>  target/i386/kvm.c     | 9 +++++++--
>>  target/i386/machine.c | 2 +-
>>  2 files changed, 8 insertions(+), 3 deletions(-)
>>
>> diff --git a/target/i386/kvm.c b/target/i386/kvm.c
>> index c931e9d..e4b4f57 100644
>> --- a/target/i386/kvm.c
>> +++ b/target/i386/kvm.c
>> @@ -1640,9 +1640,14 @@ int kvm_arch_init_vcpu(CPUState *cs)
>>                                    !!(c->ecx & CPUID_EXT_SMX);
>>      }
>>  
>> -    if (cpu_has_nested_virt(env) && !nested_virt_mig_blocker) {
>> +    if (cpu_has_vmx(env) && !nested_virt_mig_blocker &&
>> +        ((kvm_max_nested_state_length() <= 0) || !has_exception_payload)) {
>>          error_setg(&nested_virt_mig_blocker,
>> -                   "Nested virtualization does not support live migration yet");
>> +                   "Kernel do not provide required capabilities for "
>> +                   "nested virtualization migration. "
>> +                   "(CAP_NESTED_STATE=%d, CAP_EXCEPTION_PAYLOAD=%d)",
>> +                   kvm_max_nested_state_length() > 0,
>> +                   has_exception_payload);
>>          r = migrate_add_blocker(nested_virt_mig_blocker, &local_err);
>>          if (local_err) {
>>              error_report_err(local_err);
>> diff --git a/target/i386/machine.c b/target/i386/machine.c
>> index fc49e5a..851b249 100644
>> --- a/target/i386/machine.c
>> +++ b/target/i386/machine.c
>> @@ -233,7 +233,7 @@ static int cpu_pre_save(void *opaque)
>>  
>>  #ifdef CONFIG_KVM
>>      /* Verify we have nested virtualization state from kernel if required */
>> -    if (cpu_has_nested_virt(env) && !env->nested_state) {
>> +    if (kvm_enabled() && cpu_has_vmx(env) && !env->nested_state) {
>>          error_report("Guest enabled nested virtualization but kernel "
>>                  "does not support saving of nested state");
>>          return -EINVAL;
>>
> 
> Starting with this commit latest (bisection issue...), running Jailhouse in a
> guest first stalls L1 (looks like we lose interrupts), and if I try to reset
> that VM, I lose my host as well:
> 
> kvm: vmptrld           (null)/6eb900000000 failed
> kvm: vmclear fail:           (null)/6eb900000000
> 
> and then things start to lock up because we seem to lose the CPUs the guest was
> running on. Once I had this in the logs:
> 
> rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 7-... } 15040
> jiffies s: 4673 root: 0x80/.
> rcu: blocking rcu_node structures:
> Task dump for CPU 7:
> qemu-system-x86 R  running task        0 17413  17345 0x00000008
> Call Trace:
>  ? x86_virt_spec_ctrl+0x7/0xe0
>  ? vmx_vcpu_run.part.0+0x2a4/0xfa0 [kvm_intel]
>  ? vcpu_enter_guest+0x349/0xe80 [kvm]
>  ? kvm_arch_vcpu_ioctl_run+0xff/0x550 [kvm]
>  ? kvm_vcpu_ioctl+0x20d/0x590 [kvm]
>  ? get_futex_key+0x35d/0x3b0
>  ? do_vfs_ioctl+0x447/0x640
>  ? do_futex+0x157/0x1d0
>  ? ksys_ioctl+0x5e/0x90
>  ? __x64_sys_ioctl+0x16/0x20
>  ? do_syscall_64+0x60/0x120
>  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
> 
> This was on a 5.1.16 distro kernel. Currently rebuilding 5.2 vanilla.
> 
> Looks like we have up to two critical bugs here...
> 
> Jan
> 

It turns out it's actually patch 20 that introduces the problem. Maybe it is
only the kernel, but I rather suspect a combination of userspace not providing
the right state (specifically on reset) and the kernel accepting that.

Continuing the search on 5.2 now.

Jan
Paolo Bonzini July 10, 2019, 2:40 p.m. UTC | #8
On 08/07/19 20:31, Jan Kiszka wrote:
>> -    if (cpu_has_nested_virt(env) && !env->nested_state) {
>> +    if (kvm_enabled() && cpu_has_vmx(env) && !env->nested_state) {
>>          error_report("Guest enabled nested virtualization but kernel "
>>                  "does not support saving of nested state");
>>          return -EINVAL;
>>
> Starting with this commit latest (bisection issue...), running Jailhouse in a
> guest first stalls L1 (looks like we lose interrupts), and if I try to reset
> that VM, I lose my host as well:

If 5.2 is still broken, can you gather a dump of KVM_SET_NESTED_STATE's
payload?

Paolo
Jan Kiszka July 10, 2019, 4:08 p.m. UTC | #9
On 10.07.19 16:40, Paolo Bonzini wrote:
> On 08/07/19 20:31, Jan Kiszka wrote:
>>> -    if (cpu_has_nested_virt(env) && !env->nested_state) {
>>> +    if (kvm_enabled() && cpu_has_vmx(env) && !env->nested_state) {
>>>          error_report("Guest enabled nested virtualization but kernel "
>>>                  "does not support saving of nested state");
>>>          return -EINVAL;
>>>
>> Starting with this commit latest (bisection issue...), running Jailhouse in a
>> guest first stalls L1 (looks like we lose interrupts), and if I try to reset
>> that VM, I lose my host as well:
> 
> If 5.2 is still broken, can you gather a dump of KVM_SET_NESTED_STATE's
> payload?

savevm or is there a dump function in QEMU or the kernel?

Jan
Paolo Bonzini July 10, 2019, 4:34 p.m. UTC | #10
On 10/07/19 18:08, Jan Kiszka wrote:
> On 10.07.19 16:40, Paolo Bonzini wrote:
>> On 08/07/19 20:31, Jan Kiszka wrote:
>>>> -    if (cpu_has_nested_virt(env) && !env->nested_state) {
>>>> +    if (kvm_enabled() && cpu_has_vmx(env) && !env->nested_state) {
>>>>          error_report("Guest enabled nested virtualization but kernel "
>>>>                  "does not support saving of nested state");
>>>>          return -EINVAL;
>>>>
>>> Starting with this commit latest (bisection issue...), running Jailhouse in a
>>> guest first stalls L1 (looks like we lose interrupts), and if I try to reset
>>> that VM, I lose my host as well:
>>
>> If 5.2 is still broken, can you gather a dump of KVM_SET_NESTED_STATE's
>> payload?
> 
> savevm or is there a dump function in QEMU or the kernel?

There is qemu_hexdump.

Paolo
Jan Kiszka July 10, 2019, 5:15 p.m. UTC | #11
On 10.07.19 18:34, Paolo Bonzini wrote:
> On 10/07/19 18:08, Jan Kiszka wrote:
>> On 10.07.19 16:40, Paolo Bonzini wrote:
>>> On 08/07/19 20:31, Jan Kiszka wrote:
>>>>> -    if (cpu_has_nested_virt(env) && !env->nested_state) {
>>>>> +    if (kvm_enabled() && cpu_has_vmx(env) && !env->nested_state) {
>>>>>          error_report("Guest enabled nested virtualization but kernel "
>>>>>                  "does not support saving of nested state");
>>>>>          return -EINVAL;
>>>>>
>>>> Starting with this commit latest (bisection issue...), running Jailhouse in a
>>>> guest first stalls L1 (looks like we lose interrupts), and if I try to reset
>>>> that VM, I lose my host as well:
>>>
>>> If 5.2 is still broken, can you gather a dump of KVM_SET_NESTED_STATE's
>>> payload?
>>
>> savevm or is there a dump function in QEMU or the kernel?
> 
> There is qemu_hexdump.
> 

Here are two states taken during the vmport loop:

2: nested_state: 0000:  01 00 00 00  80 10 00 00  00 00 24 3a  00 00 00 00 ..........$:....
2: nested_state: 0010:  00 10 24 3a  00 00 00 00  00 00 00 00  00 00 00 00 ..$:............
2: nested_state: 0020:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0030:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0040:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0050:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0060:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0070:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0080:  d0 7e e5 11  00 00 00 00  01 00 00 00  00 00 00 00 .~..............
2: nested_state: 0090:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 00a0:  00 00 00 00  00 00 00 00  00 70 25 3a  00 00 00 00 .........p%:....
2: nested_state: 00b0:  00 80 25 3a  00 00 00 00  00 f0 00 3a  00 00 00 00 ..%:.......:....
2: nested_state: 00c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 00d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 00e0:  00 00 00 00  00 00 00 00  00 50 01 3a  00 00 00 00 .........P.:....
2: nested_state: 00f0:  00 00 00 00  00 00 00 00  1e e0 22 3a  00 00 00 00 ..........":....
2: nested_state: 0100:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0110:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0120:  00 00 00 00  00 00 00 00  10 00 00 00  01 00 00 00 ................
2: nested_state: 0130:  ff ff ff ff  ff ff ff ff  00 00 00 00  00 00 00 00 ................
2: nested_state: 0140:  06 01 07 00  06 01 07 00  01 0d 00 00  00 00 00 00 ................
2: nested_state: 0150:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0160:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0170:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0180:  06 01 07 00  00 00 00 00  00 05 00 00  00 00 00 00 ................
2: nested_state: 0190:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 01a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 01b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 01c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 01d0:  00 00 00 00  00 00 00 00  30 00 00 60  ff ff ff ff ........0..`....
2: nested_state: 01e0:  00 00 00 00  00 00 00 00  33 00 05 80  00 00 00 00 ........3.......
2: nested_state: 01f0:  a0 26 04 00  00 00 00 00  00 00 00 00  00 00 00 00 .&..............
2: nested_state: 0200:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0210:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0220:  00 00 00 00  00 00 00 00  33 00 05 80  00 00 00 00 ........3.......
2: nested_state: 0230:  00 20 6f 32  00 00 00 00  a0 26 04 00  00 00 00 00 . o2.....&......
2: nested_state: 0240:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0250:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0260:  00 97 c4 ec  b4 7f 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0270:  00 00 00 00  00 00 00 00  00 90 06 00  00 fe ff ff ................
2: nested_state: 0280:  00 70 06 00  00 fe ff ff  00 00 00 00  00 fe ff ff .p..............
2: nested_state: 0290:  00 04 00 00  00 00 00 00  88 33 16 8a  fd 7f 00 00 .........3......
2: nested_state: 02a0:  e4 d4 70 e6  b4 7f 00 00  17 32 00 00  00 00 00 00 ..p......2......
2: nested_state: 02b0:  00 00 00 00  00 00 00 00  00 82 06 00  00 fe ff ff ................
2: nested_state: 02c0:  80 11 a0 81  ff ff ff ff  3b 00 01 80  00 00 00 00 ........;.......
2: nested_state: 02d0:  00 20 24 3a  00 00 00 00  20 20 04 00  00 00 00 00 . $:....  ......
2: nested_state: 02e0:  00 00 00 00  00 00 00 00  00 00 d0 3f  80 88 ff ff ...........?....
2: nested_state: 02f0:  00 00 00 00  00 00 00 00  80 02 01 f0  ff ff ff ff ................
2: nested_state: 0300:  80 90 01 f0  ff ff ff ff  00 00 00 00  00 00 00 00 ................
2: nested_state: 0310:  00 00 00 00  00 00 00 00  00 10 01 00  80 00 00 00 ................
2: nested_state: 0320:  d4 32 00 f0  ff ff ff ff  00 00 00 00  00 00 00 00 .2..............
2: nested_state: 0330:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0340:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0350:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0360:  00 00 00 00  00 00 00 00  1e 00 00 00  72 61 00 96 ............ra..
2: nested_state: 0370:  02 00 02 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0380:  ff 6f 3f 00  00 00 00 00  00 00 00 00  ff d3 00 00 .o?.............
2: nested_state: 0390:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 03a0:  00 00 00 00  83 00 10 00  00 00 00 00  20 00 00 00 ............ ...
2: nested_state: 03b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 03c0:  02 00 00 00  00 00 00 00  ff ff ff ff  ff ff ff ff ................
2: nested_state: 03d0:  ff ff ff ff  ff ff ff ff  ff ff ff ff  ff ff ff ff ................
2: nested_state: 03e0:  00 00 00 00  6f 20 00 00  7f 00 00 00  ff 0f 00 00 ....o ..........
2: nested_state: 03f0:  00 c0 01 00  fb a0 00 00  f3 c0 00 00  00 c0 01 00 ................
2: nested_state: 0400:  00 c0 01 00  00 c0 01 00  00 00 01 00  8b 00 00 00 ................
2: nested_state: 0410:  00 00 00 00  00 00 00 00  10 00 00 00  00 00 00 00 ................
2: nested_state: 0420:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0430:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0440:  00 00 00 00  00 00 33 00  2b 00 00 00  00 00 00 00 ......3.+.......
2: nested_state: 0450:  00 00 40 00  00 00 00 00  08 00 00 00  00 00 00 00 ..@.............
2: nested_state: 0460:  00 00 10 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0470:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0480:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0490:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 04a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 04b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 04c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 04d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 04e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 04f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0500:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0510:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0520:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0530:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0540:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0550:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0560:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0570:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0580:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0590:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 05a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 05b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 05c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 05d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 05e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 05f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0600:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0610:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0620:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0630:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0640:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0650:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0660:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0670:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0680:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0690:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 06a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 06b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 06c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 06d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 06e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 06f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0700:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0710:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0720:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0730:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0740:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0750:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0760:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0770:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0780:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0790:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 07a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 07b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 07c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 07d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 07e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 07f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0800:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0810:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0820:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0830:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0840:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0850:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0860:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0870:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0880:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0890:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 08a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 08b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 08c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 08d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 08e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 08f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0900:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0910:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0920:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0930:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0940:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0950:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0960:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0970:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0980:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0990:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 09a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 09b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 09c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 09d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 09e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 09f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0a00:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0a10:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0a20:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0a30:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0a40:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0a50:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0a60:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0a70:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0a80:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0a90:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0aa0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0ab0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0ac0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0ad0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0ae0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0af0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0b00:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0b10:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0b20:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0b30:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0b40:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0b50:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0b60:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0b70:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0b80:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0b90:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0ba0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0bb0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0bc0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0bd0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0be0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0bf0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0c00:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0c10:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0c20:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0c30:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0c40:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0c50:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0c60:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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2: nested_state: 1b90:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1ba0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1bb0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1bc0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1bd0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1be0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1bf0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1c00:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1c10:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1c20:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1c30:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1c40:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1c50:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1c60:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1c70:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1c80:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1c90:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1ca0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1cb0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1cc0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1cd0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1ce0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1cf0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1d00:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1d10:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1d20:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1d30:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1d40:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1d50:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1d60:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1d70:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1d80:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1d90:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1da0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1db0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1dc0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1dd0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1de0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1df0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1e00:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1e10:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1e20:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1e30:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1e40:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1e50:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1e60:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1e70:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1e80:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1e90:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1ea0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1eb0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1ec0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1ed0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1ee0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1ef0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1f00:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1f10:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1f20:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1f30:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1f40:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1f50:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1f60:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1f70:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1f80:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1f90:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1fa0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1fb0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1fc0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1fd0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1fe0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1ff0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2000:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2010:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2020:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2030:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2040:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2050:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2060:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2070:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................


2: nested_state: 0000:  01 00 00 00  80 10 00 00  00 00 24 3a  00 00 00 00 ..........$:....
2: nested_state: 0010:  00 10 24 3a  00 00 00 00  00 00 00 00  00 00 00 00 ..$:............
2: nested_state: 0020:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0030:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0040:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0050:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0060:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0070:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0080:  d0 7e e5 11  00 00 00 00  01 00 00 00  00 00 00 00 .~..............
2: nested_state: 0090:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 00a0:  00 00 00 00  00 00 00 00  00 70 25 3a  00 00 00 00 .........p%:....
2: nested_state: 00b0:  00 80 25 3a  00 00 00 00  00 f0 00 3a  00 00 00 00 ..%:.......:....
2: nested_state: 00c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 00d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 00e0:  00 00 00 00  00 00 00 00  00 50 01 3a  00 00 00 00 .........P.:....
2: nested_state: 00f0:  00 00 00 00  00 00 00 00  1e e0 22 3a  00 00 00 00 ..........":....
2: nested_state: 0100:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0110:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0120:  00 00 00 00  00 00 00 00  10 00 00 00  01 00 00 00 ................
2: nested_state: 0130:  ff ff ff ff  ff ff ff ff  00 00 00 00  00 00 00 00 ................
2: nested_state: 0140:  06 01 07 00  06 01 07 00  01 0d 00 00  00 00 00 00 ................
2: nested_state: 0150:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0160:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0170:  18 f0 fe f2  fc 3f 00 00  00 00 00 00  00 00 00 00 .....?..........
2: nested_state: 0180:  06 01 07 00  00 00 00 00  00 05 00 00  00 00 00 00 ................
2: nested_state: 0190:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 01a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 01b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 01c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 01d0:  00 00 00 00  00 00 00 00  30 00 00 60  ff ff ff ff ........0..`....
2: nested_state: 01e0:  00 00 00 00  00 00 00 00  33 00 05 80  00 00 00 00 ........3.......
2: nested_state: 01f0:  a0 26 04 00  00 00 00 00  00 00 00 00  00 00 00 00 .&..............
2: nested_state: 0200:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0210:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0220:  00 00 00 00  00 00 00 00  33 00 05 80  00 00 00 00 ........3.......
2: nested_state: 0230:  00 20 6f 32  00 00 00 00  a0 26 04 00  00 00 00 00 . o2.....&......
2: nested_state: 0240:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0250:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0260:  00 97 c4 ec  b4 7f 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0270:  00 00 00 00  00 00 00 00  00 90 06 00  00 fe ff ff ................
2: nested_state: 0280:  00 70 06 00  00 fe ff ff  00 00 00 00  00 fe ff ff .p..............
2: nested_state: 0290:  00 04 00 00  00 00 00 00  88 33 16 8a  fd 7f 00 00 .........3......
2: nested_state: 02a0:  e4 d4 70 e6  b4 7f 00 00  17 32 00 00  00 00 00 00 ..p......2......
2: nested_state: 02b0:  00 00 00 00  00 00 00 00  00 82 06 00  00 fe ff ff ................
2: nested_state: 02c0:  80 11 a0 81  ff ff ff ff  3b 00 01 80  00 00 00 00 ........;.......
2: nested_state: 02d0:  00 20 24 3a  00 00 00 00  20 20 04 00  00 00 00 00 . $:....  ......
2: nested_state: 02e0:  00 00 00 00  00 00 00 00  00 00 d0 3f  80 88 ff ff ...........?....
2: nested_state: 02f0:  00 00 00 00  00 00 00 00  80 02 01 f0  ff ff ff ff ................
2: nested_state: 0300:  80 90 01 f0  ff ff ff ff  00 00 00 00  00 00 00 00 ................
2: nested_state: 0310:  00 00 00 00  00 00 00 00  00 10 01 00  80 00 00 00 ................
2: nested_state: 0320:  d4 32 00 f0  ff ff ff ff  00 00 00 00  00 00 00 00 .2..............
2: nested_state: 0330:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0340:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0350:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0360:  00 00 00 00  00 00 00 00  1e 00 00 00  72 61 00 96 ............ra..
2: nested_state: 0370:  02 00 02 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0380:  ff 6f 3f 00  00 00 00 00  00 00 00 00  ff d3 00 00 .o?.............
2: nested_state: 0390:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 03a0:  00 00 00 00  83 00 10 00  00 00 00 00  20 00 00 00 ............ ...
2: nested_state: 03b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 03c0:  02 00 00 00  00 00 00 00  ff ff 0f 00  ff ff ff ff ................
2: nested_state: 03d0:  ff ff ff ff  ff ff 0f 00  ff ff 0f 00  ff ff 0f 00 ................
2: nested_state: 03e0:  00 00 00 00  6f 20 00 00  7f 00 00 00  ff 0f 00 00 ....o ..........
2: nested_state: 03f0:  00 00 01 00  fb a0 00 00  f3 c0 00 00  00 00 01 00 ................
2: nested_state: 0400:  00 00 01 00  00 00 01 00  00 00 01 00  8b 00 00 00 ................
2: nested_state: 0410:  00 00 00 00  00 00 00 00  10 00 00 00  00 00 00 00 ................
2: nested_state: 0420:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0430:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0440:  00 00 00 00  00 00 33 00  2b 00 00 00  00 00 00 00 ......3.+.......
2: nested_state: 0450:  00 00 40 00  00 00 00 00  08 00 00 00  00 00 00 00 ..@.............
2: nested_state: 0460:  00 00 10 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0470:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0480:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0490:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 04a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 04b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 04c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 04d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 04e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 04f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0500:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0510:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0520:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0530:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0540:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0550:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0560:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0570:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0580:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0590:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 05a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 05b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 05c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 05d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 05e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 05f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0600:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0610:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0620:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0630:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0640:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0650:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0660:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0670:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0680:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0690:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 06a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 06b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 06c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 06d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 06e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 06f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0700:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0710:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0720:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0730:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0740:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0750:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0760:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0770:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0780:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0790:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 07a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 07b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 07c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 07d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 07e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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2: nested_state: 0800:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0810:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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2: nested_state: 0870:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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2: nested_state: 0900:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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2: nested_state: 0920:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0930:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0940:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0950:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0960:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0970:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0980:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 0990:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 09a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 09b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 09c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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2: nested_state: 18f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1900:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1910:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1920:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1930:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1940:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1950:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1960:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1970:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1980:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1990:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 19a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 19b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 19c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 19d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 19e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 19f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1a00:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1a10:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1a20:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1a30:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1a40:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1a50:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1a60:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1a70:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1a80:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1a90:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1aa0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1ab0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1ac0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1ad0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1ae0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1af0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1b00:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1b10:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1b20:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1b30:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1b40:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1b50:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1b60:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1b70:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1b80:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1b90:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1ba0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1bb0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1bc0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1bd0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1be0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1bf0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1c00:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1c10:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1c20:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1c30:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1c40:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1c50:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1c60:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1c70:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1c80:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1c90:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1ca0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1cb0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1cc0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1cd0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1ce0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1cf0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1d00:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1d10:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1d20:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1d30:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1d40:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1d50:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1d60:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1d70:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1d80:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1d90:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1da0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1db0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1dc0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1dd0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1de0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1df0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1e00:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1e10:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1e20:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1e30:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1e40:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1e50:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1e60:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1e70:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1e80:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1e90:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1ea0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1eb0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1ec0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1ed0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1ee0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1ef0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1f00:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1f10:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1f20:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1f30:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1f40:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1f50:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1f60:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1f70:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1f80:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1f90:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1fa0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1fb0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1fc0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1fd0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1fe0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1ff0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2000:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2010:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2020:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2030:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2040:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2050:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2060:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2070:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................

I will try to catch the reset thing as well.

Jan
Jan Kiszka July 10, 2019, 5:18 p.m. UTC | #12
On 10.07.19 19:15, Jan Kiszka wrote:
> I will try to catch the reset thing as well.
> 

And here are the state of the 4 cpus when issuing a reset while running an L2 guest (qemu/kvm).

(qemu) system_reset 
0: nested_state: 0000:  00 00 00 00  80 00 00 00  00 e0 e9 2e  00 00 00 00 ................
0: nested_state: 0010:  ff ff ff ff  ff ff ff ff  00 00 00 00  00 00 00 00 ................
0: nested_state: 0020:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0030:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0040:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0050:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0060:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0070:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0080:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0090:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 00a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 00b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 00c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 00d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 00e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 00f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0100:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0110:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0120:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0130:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0140:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0150:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0160:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0170:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0180:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0190:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 01a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 01b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 01c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 01d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 01e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 01f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0200:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0210:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0220:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0230:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0240:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0250:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0260:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0270:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0280:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0290:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 02a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 02b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 02c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 02d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 02e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 02f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0300:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0310:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0320:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0330:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0340:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0350:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0360:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0370:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0380:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0390:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 03a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 03b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 03c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 03d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 03e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 03f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0400:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0410:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0420:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0430:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0440:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0450:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0460:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0470:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0480:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0490:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 04a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 04b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 04c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 04d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 04e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 04f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0500:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0510:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0520:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0530:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0540:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0550:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0560:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0570:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0580:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0590:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 05a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 05b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 05c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 05d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 05e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 05f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0600:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0610:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0620:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0630:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0640:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0650:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0660:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0670:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0680:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0690:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 06a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 06b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 06c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 06d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 06e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 06f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0700:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0710:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0720:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0730:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0740:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0750:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 0760:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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0: nested_state: 1970:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 1980:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 1990:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 19a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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0: nested_state: 2010:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 2020:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
0: nested_state: 2030:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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1: nested_state: 0010:  00 90 c4 34  00 00 00 00  00 00 00 00  00 00 00 00 ...4............
1: nested_state: 0020:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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1: nested_state: 0080:  d0 7e e5 11  00 00 00 00  01 00 00 00  00 00 00 00 .~..............
1: nested_state: 0090:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
1: nested_state: 00a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
1: nested_state: 00b0:  00 00 00 00  00 00 00 00  00 20 e4 35  00 00 00 00 ......... .5....
1: nested_state: 00c0:  00 00 00 00  00 00 00 00  b0 f9 3e 31  00 00 00 00 ..........>1....
1: nested_state: 00d0:  20 f9 3e 31  00 00 00 00  48 f5 31 1a  f3 ff ff ff  .>1....H.1.....
1: nested_state: 00e0:  00 f0 f2 13  00 00 00 00  00 f0 dc 27  00 00 00 00 ...........'....
1: nested_state: 00f0:  00 00 00 00  00 00 00 00  5e b0 cd 34  00 00 00 00 ........^..4....
1: nested_state: 0100:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
1: nested_state: 0110:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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1: nested_state: 0150:  00 00 00 00  00 00 00 00  19 b0 00 00  ff 3f 00 00 .............?..
1: nested_state: 0160:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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1: nested_state: 0180:  06 01 07 00  06 01 07 00  01 0d 00 00  00 00 00 00 ................
1: nested_state: 0190:  00 00 00 00  00 00 00 00  00 10 22 34  00 00 00 00 .........."4....
1: nested_state: 01a0:  00 10 22 34  00 00 00 00  00 00 00 00  00 00 00 00 .."4............
1: nested_state: 01b0:  00 00 00 00  00 00 00 00  00 10 84 33  00 00 00 00 ...........3....
1: nested_state: 01c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
1: nested_state: 01d0:  00 00 00 00  00 00 00 00  f7 ff ff ff  ff ff ff ff ................
1: nested_state: 01e0:  71 e8 ff ff  ff ff ff ff  10 00 00 00  00 00 00 00 q...............
1: nested_state: 01f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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1: nested_state: 0210:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
1: nested_state: 0220:  00 00 00 00  00 00 00 00  30 00 00 00  00 00 00 00 ........0.......
1: nested_state: 0230:  00 00 00 00  00 00 00 00  00 20 00 00  00 00 00 00 ......... ......
1: nested_state: 0240:  00 00 00 00  00 00 00 00  00 00 0f 00  00 00 00 00 ................
1: nested_state: 0250:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
1: nested_state: 0260:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
1: nested_state: 0270:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
1: nested_state: 0280:  80 6a 0f 00  00 00 00 00  00 00 00 00  00 00 00 00 .j..............
1: nested_state: 0290:  00 04 00 00  00 00 00 00  a0 6f 00 00  00 00 00 00 .........o......
1: nested_state: 02a0:  7d bf 00 00  00 00 00 00  46 02 00 00  00 00 00 00 }.......F.......
1: nested_state: 02b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
1: nested_state: 02c0:  00 00 00 00  00 00 00 00  33 00 05 80  00 00 00 00 ........3.......
1: nested_state: 02d0:  00 70 0c 14  00 00 00 00  a0 26 04 00  00 00 00 00 .p.......&......
1: nested_state: 02e0:  00 47 ac bc  56 7f 00 00  00 00 c8 3f  80 88 ff ff .G..V......?....
1: nested_state: 02f0:  00 60 03 00  00 fe ff ff  00 40 03 00  00 fe ff ff .`.......@......
1: nested_state: 0300:  00 00 00 00  00 fe ff ff  00 52 03 00  00 fe ff ff .........R......
1: nested_state: 0310:  80 11 a0 81  ff ff ff ff  a0 bc d9 00  00 c9 ff ff ................
1: nested_state: 0320:  10 62 28 a0  ff ff ff ff  00 00 00 00  00 00 00 00 .b(.............
1: nested_state: 0330:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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1: nested_state: 0360:  00 00 00 00  00 00 00 00  3f 00 00 00  fa 6d a0 b5 ........?....m..
1: nested_state: 0370:  42 00 06 00  00 00 00 00  00 00 00 00  00 00 00 00 B...............
1: nested_state: 0380:  ff ef 2b 00  00 00 00 00  00 00 00 00  ff d1 00 00 ..+.............
1: nested_state: 0390:  00 00 00 00  08 00 00 00  00 00 00 00  00 00 00 00 ................
1: nested_state: 03a0:  00 00 00 00  e3 20 02 00  00 00 00 00  0c 00 00 00 ..... ..........
1: nested_state: 03b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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1: nested_state: 03e0:  ff ff 00 00  ff ff 00 00  37 00 00 00  ff 03 00 00 ........7.......
1: nested_state: 03f0:  93 00 00 00  9b 00 00 00  93 00 00 00  93 00 00 00 ................
1: nested_state: 0400:  93 00 00 00  93 00 00 00  82 00 00 00  8b 00 00 00 ................
1: nested_state: 0410:  00 00 00 00  00 00 00 00  00 00 00 00  10 00 00 00 ................
1: nested_state: 0420:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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1: nested_state: 0440:  01 00 00 00  00 00 00 f0  00 00 00 00  00 00 00 00 ................
1: nested_state: 0450:  00 00 00 00  00 00 00 00  10 00 18 00  00 00 00 00 ................
1: nested_state: 0460:  00 00 40 00  ff 01 00 00  00 00 00 00  00 00 00 00 ..@.............
1: nested_state: 0470:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
1: nested_state: 0480:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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1: nested_state: 1970:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
1: nested_state: 1980:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
1: nested_state: 1990:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
1: nested_state: 19a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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2: nested_state: 11a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 11b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 11c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 11d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 11e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 11f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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2: nested_state: 1210:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1220:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1230:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1240:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1250:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1260:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1270:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1280:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1290:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 12a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 12b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 12c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 12d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 12e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 12f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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2: nested_state: 1310:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1320:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1330:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1340:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1350:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1360:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1370:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1380:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1390:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 13a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 13b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 13c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 13d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 13e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 13f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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2: nested_state: 1410:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1420:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1430:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1440:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1450:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1460:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1470:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1480:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1490:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 14a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 14b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 14c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 14d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 14e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 14f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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2: nested_state: 1510:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1520:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1530:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1540:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1550:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1560:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1570:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1580:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1590:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 15a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 15b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 15c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 15d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 15e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 15f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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2: nested_state: 1610:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1620:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1630:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1640:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1650:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1660:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1670:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1680:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1690:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 16a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 16b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 16c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 16d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 16e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 16f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1700:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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2: nested_state: 1770:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1780:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1790:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 17a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 17b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 17c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 17d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 17e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 17f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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2: nested_state: 1810:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1820:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1830:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1840:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1850:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1860:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1870:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1880:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1890:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 18a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 18b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 18c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 18d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 18e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 18f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1900:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1910:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1920:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1930:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1940:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1950:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1960:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1970:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1980:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1990:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 19a0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 19b0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 19c0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 19d0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 19e0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 19f0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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2: nested_state: 1f90:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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2: nested_state: 1fb0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 1fc0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
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2: nested_state: 1ff0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2000:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2010:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2020:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2030:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2040:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2050:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2060:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
2: nested_state: 2070:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................

3: nested_state: 0000:  00 00 00 00  80 00 00 00  00 b0 e9 2e  00 00 00 00 ................
3: nested_state: 0010:  ff ff ff ff  ff ff ff ff  00 00 00 00  00 00 00 00 ................
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3: nested_state: 1e50:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1e60:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1e70:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1e80:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1e90:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1ea0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1eb0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1ec0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1ed0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1ee0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1ef0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1f00:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1f10:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1f20:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1f30:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1f40:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1f50:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1f60:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1f70:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1f80:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1f90:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1fa0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1fb0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1fc0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1fd0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1fe0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 1ff0:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 2000:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 2010:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 2020:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 2030:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 2040:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 2050:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 2060:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................
3: nested_state: 2070:  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 ................

CPU 1 is likely interesting. I didn't confirm if this state would have crashed because I didn't submit the states, just left QEMU after the last CPU.

Jan
diff mbox series

Patch

diff --git a/target/i386/kvm.c b/target/i386/kvm.c
index c931e9d..e4b4f57 100644
--- a/target/i386/kvm.c
+++ b/target/i386/kvm.c
@@ -1640,9 +1640,14 @@  int kvm_arch_init_vcpu(CPUState *cs)
                                   !!(c->ecx & CPUID_EXT_SMX);
     }
 
-    if (cpu_has_nested_virt(env) && !nested_virt_mig_blocker) {
+    if (cpu_has_vmx(env) && !nested_virt_mig_blocker &&
+        ((kvm_max_nested_state_length() <= 0) || !has_exception_payload)) {
         error_setg(&nested_virt_mig_blocker,
-                   "Nested virtualization does not support live migration yet");
+                   "Kernel do not provide required capabilities for "
+                   "nested virtualization migration. "
+                   "(CAP_NESTED_STATE=%d, CAP_EXCEPTION_PAYLOAD=%d)",
+                   kvm_max_nested_state_length() > 0,
+                   has_exception_payload);
         r = migrate_add_blocker(nested_virt_mig_blocker, &local_err);
         if (local_err) {
             error_report_err(local_err);
diff --git a/target/i386/machine.c b/target/i386/machine.c
index fc49e5a..851b249 100644
--- a/target/i386/machine.c
+++ b/target/i386/machine.c
@@ -233,7 +233,7 @@  static int cpu_pre_save(void *opaque)
 
 #ifdef CONFIG_KVM
     /* Verify we have nested virtualization state from kernel if required */
-    if (cpu_has_nested_virt(env) && !env->nested_state) {
+    if (kvm_enabled() && cpu_has_vmx(env) && !env->nested_state) {
         error_report("Guest enabled nested virtualization but kernel "
                 "does not support saving of nested state");
         return -EINVAL;