[RFC,v4,02/16] linux-headers: header update for KVM/ARM KVM_ARM_GET_MAX_VM_PHYS_SHIFT
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Message ID 20181018143042.29588-3-eric.auger@redhat.com
State New
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Series
  • ARM virt: PCDIMM/NVDIMM at 2TB
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Commit Message

Auger Eric Oct. 18, 2018, 2:30 p.m. UTC
This is a header update against kvmarm next branch

git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm kvmarm/next

to get the KVM_ARM_GET_MAX_VM_PHYS_SHIFT ioctl. This allows to retrieve
the IPA address range KVM supports.

Signed-off-by: Eric Auger <eric.auger@redhat.com>

---

v3 -> v4:
- update against kvmarm next
---
 linux-headers/linux/kvm.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

Comments

Suzuki K Poulose Oct. 19, 2018, 8:49 a.m. UTC | #1
Hi Eric,

On 10/18/2018 03:30 PM, Eric Auger wrote:
> This is a header update against kvmarm next branch
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm kvmarm/next
> 
> to get the KVM_ARM_GET_MAX_VM_PHYS_SHIFT ioctl. This allows to retrieve
> the IPA address range KVM supports.
> 
> Signed-off-by: Eric Auger <eric.auger@redhat.com>
> 
> ---
> 
> v3 -> v4:
> - update against kvmarm next
> ---
>   linux-headers/linux/kvm.h | 10 ++++++++++
>   1 file changed, 10 insertions(+)
> 
> diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
> index 83ba4eb571..9647ce4fcb 100644
> --- a/linux-headers/linux/kvm.h
> +++ b/linux-headers/linux/kvm.h
> @@ -750,6 +750,15 @@ struct kvm_ppc_resize_hpt {
>   
>   #define KVM_S390_SIE_PAGE_OFFSET 1
>   
> +/*
> + * On arm64, machine type can be used to request the physical
> + * address size for the VM. Bits[7-0] are reserved for the guest
> + * PA size shift (i.e, log2(PA_Size)). For backward compatibility,
> + * value 0 implies the default IPA size, 40bits.
> + */
> +#define KVM_VM_TYPE_ARM_IPA_SIZE_MASK	0xffULL
> +#define KVM_VM_TYPE_ARM_IPA_SIZE(x)		\
> +	((x) & KVM_VM_TYPE_ARM_IPA_SIZE_MASK)
>   /*
>    * ioctls for /dev/kvm fds:
>    */
> @@ -953,6 +962,7 @@ struct kvm_ppc_resize_hpt {
>   #define KVM_CAP_NESTED_STATE 157
>   #define KVM_CAP_ARM_INJECT_SERROR_ESR 158
>   #define KVM_CAP_MSR_PLATFORM_INFO 159
> +#define KVM_CAP_ARM_VM_IPA_SIZE 160 /* returns maximum IPA bits for a VM */

Please be aware that there have been multiple merge conflicts with
the kvmarm-tree onto kvm tree upstream and the numbers have changed.
I assume that you will be rebasing this to mainline anyways.

Cheers
Suzuki
Auger Eric Oct. 19, 2018, 2:02 p.m. UTC | #2
Hi Suzuki,

On 10/19/18 10:49 AM, Suzuki K Poulose wrote:
> Hi Eric,
> 
> On 10/18/2018 03:30 PM, Eric Auger wrote:
>> This is a header update against kvmarm next branch
>>
>> git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm kvmarm/next
>>
>> to get the KVM_ARM_GET_MAX_VM_PHYS_SHIFT ioctl. This allows to retrieve
>> the IPA address range KVM supports.
>>
>> Signed-off-by: Eric Auger <eric.auger@redhat.com>
>>
>> ---
>>
>> v3 -> v4:
>> - update against kvmarm next
>> ---
>>   linux-headers/linux/kvm.h | 10 ++++++++++
>>   1 file changed, 10 insertions(+)
>>
>> diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
>> index 83ba4eb571..9647ce4fcb 100644
>> --- a/linux-headers/linux/kvm.h
>> +++ b/linux-headers/linux/kvm.h
>> @@ -750,6 +750,15 @@ struct kvm_ppc_resize_hpt {
>>     #define KVM_S390_SIE_PAGE_OFFSET 1
>>   +/*
>> + * On arm64, machine type can be used to request the physical
>> + * address size for the VM. Bits[7-0] are reserved for the guest
>> + * PA size shift (i.e, log2(PA_Size)). For backward compatibility,
>> + * value 0 implies the default IPA size, 40bits.
>> + */
>> +#define KVM_VM_TYPE_ARM_IPA_SIZE_MASK    0xffULL
>> +#define KVM_VM_TYPE_ARM_IPA_SIZE(x)        \
>> +    ((x) & KVM_VM_TYPE_ARM_IPA_SIZE_MASK)
>>   /*
>>    * ioctls for /dev/kvm fds:
>>    */
>> @@ -953,6 +962,7 @@ struct kvm_ppc_resize_hpt {
>>   #define KVM_CAP_NESTED_STATE 157
>>   #define KVM_CAP_ARM_INJECT_SERROR_ESR 158
>>   #define KVM_CAP_MSR_PLATFORM_INFO 159
>> +#define KVM_CAP_ARM_VM_IPA_SIZE 160 /* returns maximum IPA bits for a
>> VM */
> 
> Please be aware that there have been multiple merge conflicts with
> the kvmarm-tree onto kvm tree upstream and the numbers have changed.
> I assume that you will be rebasing this to mainline anyways.

Thank you for the heads up. Yes I will respin this header update against
the master branch later on.

Thanks

Eric
> 
> Cheers
> Suzuki
>

Patch
diff mbox series

diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
index 83ba4eb571..9647ce4fcb 100644
--- a/linux-headers/linux/kvm.h
+++ b/linux-headers/linux/kvm.h
@@ -750,6 +750,15 @@  struct kvm_ppc_resize_hpt {
 
 #define KVM_S390_SIE_PAGE_OFFSET 1
 
+/*
+ * On arm64, machine type can be used to request the physical
+ * address size for the VM. Bits[7-0] are reserved for the guest
+ * PA size shift (i.e, log2(PA_Size)). For backward compatibility,
+ * value 0 implies the default IPA size, 40bits.
+ */
+#define KVM_VM_TYPE_ARM_IPA_SIZE_MASK	0xffULL
+#define KVM_VM_TYPE_ARM_IPA_SIZE(x)		\
+	((x) & KVM_VM_TYPE_ARM_IPA_SIZE_MASK)
 /*
  * ioctls for /dev/kvm fds:
  */
@@ -953,6 +962,7 @@  struct kvm_ppc_resize_hpt {
 #define KVM_CAP_NESTED_STATE 157
 #define KVM_CAP_ARM_INJECT_SERROR_ESR 158
 #define KVM_CAP_MSR_PLATFORM_INFO 159
+#define KVM_CAP_ARM_VM_IPA_SIZE 160 /* returns maximum IPA bits for a VM */
 
 #ifdef KVM_CAP_IRQ_ROUTING