| Message ID | 20191129094809.26684-4-frankja@linux.ibm.com |
|---|---|
| State | New |
| Headers | show |
| Series | s390x: Protected Virtualization support | expand |
On 29.11.19 10:47, Janosch Frank wrote: > When a guest has saved a ipib of type 5 and call diagnose308 with > subcode 10, we have to setup the protected processing environment via > Ultravisor calls. The calls are done by KVM and are exposed via an API. > > The following steps are necessary: > 1. Create a VM (register it with the Ultravisor) > 2. Create secure CPUs for all of our current cpus I do wonder why KVM can't handle that when switching to the encrypted VM. Any specific reason QEMU has to be involved? I would have guessed s390_pv_vm_create() can handle that internally. KVM knows all the VCPUs. [...] > switch (reset_type) { > case S390_RESET_EXTERNAL: > case S390_RESET_REIPL: > @@ -357,6 +361,28 @@ static void s390_machine_reset(MachineState *machine) > run_on_cpu(cs, s390_do_cpu_initial_reset, RUN_ON_CPU_NULL); > run_on_cpu(cs, s390_do_cpu_load_normal, RUN_ON_CPU_NULL); > break; > + case S390_RESET_PV: /* Subcode 10 */ > + subsystem_reset(); > + s390_crypto_reset(); > + > + CPU_FOREACH(t) { > + run_on_cpu(t, s390_do_cpu_full_reset, RUN_ON_CPU_NULL); > + } > + > + /* Create SE VM */ > + s390_pv_vm_create(); > + CPU_FOREACH(t) { > + s390_pv_vcpu_create(t); > + } So, on any other reboot, the VM/CPUs won't get cleaned up? (is this really a "create" or rather a "s390_pv_vm_enable()"). The "create" terminology somehow sounds wrong to me ... > + > + /* Set SE header and unpack */ > + s390_ipl_prepare_pv_header(); > + /* Decrypt image */ > + s390_ipl_pv_unpack(); > + /* Verify integrity */ > + s390_pv_verify(); > + s390_cpu_set_state(S390_CPU_STATE_OPERATING, cpu); > + break; > default: > g_assert_not_reached(); > } > diff --git a/target/s390x/cpu_features_def.inc.h b/target/s390x/cpu_features_def.inc.h > index 31dff0d84e..60db28351d 100644 > --- a/target/s390x/cpu_features_def.inc.h > +++ b/target/s390x/cpu_features_def.inc.h > @@ -107,6 +107,7 @@ DEF_FEAT(DEFLATE_BASE, "deflate-base", STFL, 151, "Deflate-conversion facility ( > DEF_FEAT(VECTOR_PACKED_DECIMAL_ENH, "vxpdeh", STFL, 152, "Vector-Packed-Decimal-Enhancement Facility") > DEF_FEAT(MSA_EXT_9, "msa9-base", STFL, 155, "Message-security-assist-extension-9 facility (excluding subfunctions)") > DEF_FEAT(ETOKEN, "etoken", STFL, 156, "Etoken facility") > +DEF_FEAT(UNPACK, "unpack", STFL, 161, "Unpack facility") > > /* Features exposed via SCLP SCCB Byte 80 - 98 (bit numbers relative to byte-80) */ > DEF_FEAT(SIE_GSLS, "gsls", SCLP_CONF_CHAR, 40, "SIE: Guest-storage-limit-suppression facility") >
On 29/11/2019 10.47, Janosch Frank wrote: > When a guest has saved a ipib of type 5 and call diagnose308 with > subcode 10, we have to setup the protected processing environment via > Ultravisor calls. The calls are done by KVM and are exposed via an API. > > The following steps are necessary: > 1. Create a VM (register it with the Ultravisor) > 2. Create secure CPUs for all of our current cpus > 3. Forward the secure header to the Ultravisor (has all information on > how to decrypt the image and VM information) > 4. Protect image pages from the host and decrypt them > 5. Verify the image integrity > > Only after step 5 a protected VM is allowed to run. > > Signed-off-by: Janosch Frank <frankja@linux.ibm.com> > --- [...] > +++ b/hw/s390x/pv.c > @@ -0,0 +1,118 @@ > +/* > + * Secure execution functions > + * > + * Copyright IBM Corp. 2019 > + * Author(s): > + * Janosch Frank <frankja@linux.ibm.com> > + * > + * This work is licensed under the terms of the GNU GPL, version 2 or (at > + * your option) any later version. See the COPYING file in the top-level > + * directory. > + */ > +#include "qemu/osdep.h" > +#include <sys/ioctl.h> > + > +#include <linux/kvm.h> > + > +#include "qemu/error-report.h" > +#include "sysemu/kvm.h" > +#include "pv.h" > + > +static int s390_pv_cmd(uint32_t cmd, void *data) > +{ > + int rc; > + struct kvm_pv_cmd pv_cmd = { > + .cmd = cmd, > + .data = (uint64_t)data, > + }; > + > + rc = kvm_vm_ioctl(kvm_state, KVM_S390_PV_COMMAND, &pv_cmd); > + if (rc) { > + error_report("KVM PV command failed cmd: %d rc: %d", cmd, rc); > + exit(1); > + } > + return rc; > +} > + > +static int s390_pv_cmd_vcpu(CPUState *cs, uint32_t cmd, void *data) > +{ > + int rc; > + struct kvm_pv_cmd pv_cmd = { > + .cmd = cmd, > + .data = (uint64_t)data, > + }; > + > + rc = kvm_vcpu_ioctl(cs, KVM_S390_PV_COMMAND_VCPU, &pv_cmd); > + if (rc) { > + error_report("KVM PV VCPU command failed cmd: %d rc: %d", cmd, rc); > + exit(1); > + } > + return rc; > +} > + > +int s390_pv_vm_create(void) > +{ > + return s390_pv_cmd(KVM_PV_VM_CREATE, NULL); > +} > + > +int s390_pv_vm_destroy(void) > +{ > + return s390_pv_cmd(KVM_PV_VM_DESTROY, NULL); > +} > + > +int s390_pv_vcpu_create(CPUState *cs) > +{ > + return s390_pv_cmd_vcpu(cs, KVM_PV_VCPU_CREATE, NULL); > +} > + > +int s390_pv_vcpu_destroy(CPUState *cs) > +{ > + S390CPU *cpu = S390_CPU(cs); > + CPUS390XState *env = &cpu->env; > + int rc; > + > + rc = s390_pv_cmd_vcpu(cs, KVM_PV_VCPU_DESTROY, NULL); > + if (!rc) { > + env->pv = false; > + } > + return rc; > +} > + > +int s390_pv_set_sec_parms(uint64_t origin, uint64_t length) > +{ > + struct kvm_s390_pv_sec_parm args = { > + .origin = origin, > + .length = length, > + }; > + > + return s390_pv_cmd(KVM_PV_VM_SET_SEC_PARMS, &args); > +} > + > +/* > + * Called for each component in the SE type IPL parameter block 0. > + */ > +int s390_pv_unpack(uint64_t addr, uint64_t size, uint64_t tweak) > +{ > + struct kvm_s390_pv_unp args = { > + .addr = addr, > + .size = size, > + .tweak = tweak, > + }; > + > + return s390_pv_cmd(KVM_PV_VM_UNPACK, &args); > +} > + > +int s390_pv_perf_clear_reset(void) > +{ > + return s390_pv_cmd(KVM_PV_VM_PERF_CLEAR_RESET, NULL); > +} > + > +int s390_pv_verify(void) > +{ > + return s390_pv_cmd(KVM_PV_VM_VERIFY, NULL); > +} > + > +int s390_pv_unshare(void) > +{ > + return s390_pv_cmd(KVM_PV_VM_UNSHARE, NULL); > +} > diff --git a/hw/s390x/pv.h b/hw/s390x/pv.h > new file mode 100644 > index 0000000000..eb074e4bc9 > --- /dev/null > +++ b/hw/s390x/pv.h > @@ -0,0 +1,26 @@ > +/* > + * Protected Virtualization header > + * > + * Copyright IBM Corp. 2019 > + * Author(s): > + * Janosch Frank <frankja@linux.ibm.com> > + * > + * This work is licensed under the terms of the GNU GPL, version 2 or (at > + * your option) any later version. See the COPYING file in the top-level > + * directory. > + */ > + > +#ifndef HW_S390_PV_H > +#define HW_S390_PV_H > + > +int s390_pv_vm_create(void); > +int s390_pv_vm_destroy(void); > +int s390_pv_vcpu_destroy(CPUState *cs); > +int s390_pv_vcpu_create(CPUState *cs); > +int s390_pv_set_sec_parms(uint64_t origin, uint64_t length); > +int s390_pv_unpack(uint64_t addr, uint64_t size, uint64_t tweak); > +int s390_pv_perf_clear_reset(void); > +int s390_pv_verify(void); > +int s390_pv_unshare(void); I still think you should make all those functions returning "void" instead of "int" - since errors results in an exit() in s390_pv_cmd() and s390_pv_cmd_vcpu() anyway... > + > +#endif /* HW_S390_PV_H */ > diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c > index c1d1440272..f9481ccace 100644 > --- a/hw/s390x/s390-virtio-ccw.c > +++ b/hw/s390x/s390-virtio-ccw.c > @@ -41,6 +41,7 @@ > #include "hw/qdev-properties.h" > #include "hw/s390x/tod.h" > #include "sysemu/sysemu.h" > +#include "hw/s390x/pv.h" > > S390CPU *s390_cpu_addr2state(uint16_t cpu_addr) > { > @@ -322,6 +323,7 @@ static void s390_machine_reset(MachineState *machine) > { > enum s390_reset reset_type; > CPUState *cs, *t; > + S390CPU *cpu; > > /* get the reset parameters, reset them once done */ > s390_ipl_get_reset_request(&cs, &reset_type); > @@ -329,6 +331,8 @@ static void s390_machine_reset(MachineState *machine) > /* all CPUs are paused and synchronized at this point */ > s390_cmma_reset(); > > + cpu = S390_CPU(cs); > + > switch (reset_type) { > case S390_RESET_EXTERNAL: > case S390_RESET_REIPL: > @@ -357,6 +361,28 @@ static void s390_machine_reset(MachineState *machine) > run_on_cpu(cs, s390_do_cpu_initial_reset, RUN_ON_CPU_NULL); > run_on_cpu(cs, s390_do_cpu_load_normal, RUN_ON_CPU_NULL); > break; > + case S390_RESET_PV: /* Subcode 10 */ > + subsystem_reset(); > + s390_crypto_reset(); > + > + CPU_FOREACH(t) { > + run_on_cpu(t, s390_do_cpu_full_reset, RUN_ON_CPU_NULL); > + } > + > + /* Create SE VM */ > + s390_pv_vm_create(); > + CPU_FOREACH(t) { > + s390_pv_vcpu_create(t); > + } > + > + /* Set SE header and unpack */ > + s390_ipl_prepare_pv_header(); > + /* Decrypt image */ > + s390_ipl_pv_unpack(); > + /* Verify integrity */ > + s390_pv_verify(); > + s390_cpu_set_state(S390_CPU_STATE_OPERATING, cpu); > + break; ... and here you completely ignore the return codes of all the new functions. Thomas
On 12/4/19 11:48 AM, Thomas Huth wrote: > On 29/11/2019 10.47, Janosch Frank wrote: >> When a guest has saved a ipib of type 5 and call diagnose308 with >> subcode 10, we have to setup the protected processing environment via >> Ultravisor calls. The calls are done by KVM and are exposed via an API. >> >> The following steps are necessary: >> 1. Create a VM (register it with the Ultravisor) >> 2. Create secure CPUs for all of our current cpus >> 3. Forward the secure header to the Ultravisor (has all information on >> how to decrypt the image and VM information) >> 4. Protect image pages from the host and decrypt them >> 5. Verify the image integrity >> >> Only after step 5 a protected VM is allowed to run. >> >> Signed-off-by: Janosch Frank <frankja@linux.ibm.com> >> --- > [...] >> +++ b/hw/s390x/pv.c >> @@ -0,0 +1,118 @@ >> +/* >> + * Secure execution functions >> + * >> + * Copyright IBM Corp. 2019 >> + * Author(s): >> + * Janosch Frank <frankja@linux.ibm.com> >> + * >> + * This work is licensed under the terms of the GNU GPL, version 2 or (at >> + * your option) any later version. See the COPYING file in the top-level >> + * directory. >> + */ >> +#include "qemu/osdep.h" >> +#include <sys/ioctl.h> >> + >> +#include <linux/kvm.h> >> + >> +#include "qemu/error-report.h" >> +#include "sysemu/kvm.h" >> +#include "pv.h" >> + >> +static int s390_pv_cmd(uint32_t cmd, void *data) >> +{ >> + int rc; >> + struct kvm_pv_cmd pv_cmd = { >> + .cmd = cmd, >> + .data = (uint64_t)data, >> + }; >> + >> + rc = kvm_vm_ioctl(kvm_state, KVM_S390_PV_COMMAND, &pv_cmd); >> + if (rc) { >> + error_report("KVM PV command failed cmd: %d rc: %d", cmd, rc); >> + exit(1); >> + } >> + return rc; >> +} >> + >> +static int s390_pv_cmd_vcpu(CPUState *cs, uint32_t cmd, void *data) >> +{ >> + int rc; >> + struct kvm_pv_cmd pv_cmd = { >> + .cmd = cmd, >> + .data = (uint64_t)data, >> + }; >> + >> + rc = kvm_vcpu_ioctl(cs, KVM_S390_PV_COMMAND_VCPU, &pv_cmd); >> + if (rc) { >> + error_report("KVM PV VCPU command failed cmd: %d rc: %d", cmd, rc); >> + exit(1); >> + } >> + return rc; >> +} >> + >> +int s390_pv_vm_create(void) >> +{ >> + return s390_pv_cmd(KVM_PV_VM_CREATE, NULL); >> +} >> + >> +int s390_pv_vm_destroy(void) >> +{ >> + return s390_pv_cmd(KVM_PV_VM_DESTROY, NULL); >> +} >> + >> +int s390_pv_vcpu_create(CPUState *cs) >> +{ >> + return s390_pv_cmd_vcpu(cs, KVM_PV_VCPU_CREATE, NULL); >> +} >> + >> +int s390_pv_vcpu_destroy(CPUState *cs) >> +{ >> + S390CPU *cpu = S390_CPU(cs); >> + CPUS390XState *env = &cpu->env; >> + int rc; >> + >> + rc = s390_pv_cmd_vcpu(cs, KVM_PV_VCPU_DESTROY, NULL); >> + if (!rc) { >> + env->pv = false; >> + } >> + return rc; >> +} >> + >> +int s390_pv_set_sec_parms(uint64_t origin, uint64_t length) >> +{ >> + struct kvm_s390_pv_sec_parm args = { >> + .origin = origin, >> + .length = length, >> + }; >> + >> + return s390_pv_cmd(KVM_PV_VM_SET_SEC_PARMS, &args); >> +} >> + >> +/* >> + * Called for each component in the SE type IPL parameter block 0. >> + */ >> +int s390_pv_unpack(uint64_t addr, uint64_t size, uint64_t tweak) >> +{ >> + struct kvm_s390_pv_unp args = { >> + .addr = addr, >> + .size = size, >> + .tweak = tweak, >> + }; >> + >> + return s390_pv_cmd(KVM_PV_VM_UNPACK, &args); >> +} >> + >> +int s390_pv_perf_clear_reset(void) >> +{ >> + return s390_pv_cmd(KVM_PV_VM_PERF_CLEAR_RESET, NULL); >> +} >> + >> +int s390_pv_verify(void) >> +{ >> + return s390_pv_cmd(KVM_PV_VM_VERIFY, NULL); >> +} >> + >> +int s390_pv_unshare(void) >> +{ >> + return s390_pv_cmd(KVM_PV_VM_UNSHARE, NULL); >> +} >> diff --git a/hw/s390x/pv.h b/hw/s390x/pv.h >> new file mode 100644 >> index 0000000000..eb074e4bc9 >> --- /dev/null >> +++ b/hw/s390x/pv.h >> @@ -0,0 +1,26 @@ >> +/* >> + * Protected Virtualization header >> + * >> + * Copyright IBM Corp. 2019 >> + * Author(s): >> + * Janosch Frank <frankja@linux.ibm.com> >> + * >> + * This work is licensed under the terms of the GNU GPL, version 2 or (at >> + * your option) any later version. See the COPYING file in the top-level >> + * directory. >> + */ >> + >> +#ifndef HW_S390_PV_H >> +#define HW_S390_PV_H >> + >> +int s390_pv_vm_create(void); >> +int s390_pv_vm_destroy(void); >> +int s390_pv_vcpu_destroy(CPUState *cs); >> +int s390_pv_vcpu_create(CPUState *cs); >> +int s390_pv_set_sec_parms(uint64_t origin, uint64_t length); >> +int s390_pv_unpack(uint64_t addr, uint64_t size, uint64_t tweak); >> +int s390_pv_perf_clear_reset(void); >> +int s390_pv_verify(void); >> +int s390_pv_unshare(void); > > I still think you should make all those functions returning "void" > instead of "int" - since errors results in an exit() in s390_pv_cmd() > and s390_pv_cmd_vcpu() anyway... Hey Thomas, I have requested an error code for diag 308 subcode 10 that tells the VM, that we didn't succeed starting a secure guest. Once that is in place, I'll need to check the return codes. Although I'm a bit unsure how I should hook that up because of the diag308/reset handler split. > >> + >> +#endif /* HW_S390_PV_H */ >> diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c >> index c1d1440272..f9481ccace 100644 >> --- a/hw/s390x/s390-virtio-ccw.c >> +++ b/hw/s390x/s390-virtio-ccw.c >> @@ -41,6 +41,7 @@ >> #include "hw/qdev-properties.h" >> #include "hw/s390x/tod.h" >> #include "sysemu/sysemu.h" >> +#include "hw/s390x/pv.h" >> >> S390CPU *s390_cpu_addr2state(uint16_t cpu_addr) >> { >> @@ -322,6 +323,7 @@ static void s390_machine_reset(MachineState *machine) >> { >> enum s390_reset reset_type; >> CPUState *cs, *t; >> + S390CPU *cpu; >> >> /* get the reset parameters, reset them once done */ >> s390_ipl_get_reset_request(&cs, &reset_type); >> @@ -329,6 +331,8 @@ static void s390_machine_reset(MachineState *machine) >> /* all CPUs are paused and synchronized at this point */ >> s390_cmma_reset(); >> >> + cpu = S390_CPU(cs); >> + >> switch (reset_type) { >> case S390_RESET_EXTERNAL: >> case S390_RESET_REIPL: >> @@ -357,6 +361,28 @@ static void s390_machine_reset(MachineState *machine) >> run_on_cpu(cs, s390_do_cpu_initial_reset, RUN_ON_CPU_NULL); >> run_on_cpu(cs, s390_do_cpu_load_normal, RUN_ON_CPU_NULL); >> break; >> + case S390_RESET_PV: /* Subcode 10 */ >> + subsystem_reset(); >> + s390_crypto_reset(); >> + >> + CPU_FOREACH(t) { >> + run_on_cpu(t, s390_do_cpu_full_reset, RUN_ON_CPU_NULL); >> + } >> + >> + /* Create SE VM */ >> + s390_pv_vm_create(); >> + CPU_FOREACH(t) { >> + s390_pv_vcpu_create(t); >> + } >> + >> + /* Set SE header and unpack */ >> + s390_ipl_prepare_pv_header(); >> + /* Decrypt image */ >> + s390_ipl_pv_unpack(); >> + /* Verify integrity */ >> + s390_pv_verify(); >> + s390_cpu_set_state(S390_CPU_STATE_OPERATING, cpu); >> + break; > > ... and here you completely ignore the return codes of all the new > functions. > > Thomas >
On 04/12/2019 12.32, Janosch Frank wrote: > On 12/4/19 11:48 AM, Thomas Huth wrote: >> On 29/11/2019 10.47, Janosch Frank wrote: >>> When a guest has saved a ipib of type 5 and call diagnose308 with >>> subcode 10, we have to setup the protected processing environment via >>> Ultravisor calls. The calls are done by KVM and are exposed via an API. >>> >>> The following steps are necessary: >>> 1. Create a VM (register it with the Ultravisor) >>> 2. Create secure CPUs for all of our current cpus >>> 3. Forward the secure header to the Ultravisor (has all information on >>> how to decrypt the image and VM information) >>> 4. Protect image pages from the host and decrypt them >>> 5. Verify the image integrity >>> >>> Only after step 5 a protected VM is allowed to run. >>> >>> Signed-off-by: Janosch Frank <frankja@linux.ibm.com> >>> --- >> [...] >>> +++ b/hw/s390x/pv.c >>> @@ -0,0 +1,118 @@ >>> +/* >>> + * Secure execution functions >>> + * >>> + * Copyright IBM Corp. 2019 >>> + * Author(s): >>> + * Janosch Frank <frankja@linux.ibm.com> >>> + * >>> + * This work is licensed under the terms of the GNU GPL, version 2 or (at >>> + * your option) any later version. See the COPYING file in the top-level >>> + * directory. >>> + */ >>> +#include "qemu/osdep.h" >>> +#include <sys/ioctl.h> >>> + >>> +#include <linux/kvm.h> >>> + >>> +#include "qemu/error-report.h" >>> +#include "sysemu/kvm.h" >>> +#include "pv.h" >>> + >>> +static int s390_pv_cmd(uint32_t cmd, void *data) >>> +{ >>> + int rc; >>> + struct kvm_pv_cmd pv_cmd = { >>> + .cmd = cmd, >>> + .data = (uint64_t)data, >>> + }; >>> + >>> + rc = kvm_vm_ioctl(kvm_state, KVM_S390_PV_COMMAND, &pv_cmd); >>> + if (rc) { >>> + error_report("KVM PV command failed cmd: %d rc: %d", cmd, rc); >>> + exit(1); >>> + } >>> + return rc; >>> +} >>> + >>> +static int s390_pv_cmd_vcpu(CPUState *cs, uint32_t cmd, void *data) >>> +{ >>> + int rc; >>> + struct kvm_pv_cmd pv_cmd = { >>> + .cmd = cmd, >>> + .data = (uint64_t)data, >>> + }; >>> + >>> + rc = kvm_vcpu_ioctl(cs, KVM_S390_PV_COMMAND_VCPU, &pv_cmd); >>> + if (rc) { >>> + error_report("KVM PV VCPU command failed cmd: %d rc: %d", cmd, rc); >>> + exit(1); >>> + } >>> + return rc; >>> +} >>> + >>> +int s390_pv_vm_create(void) >>> +{ >>> + return s390_pv_cmd(KVM_PV_VM_CREATE, NULL); >>> +} >>> + >>> +int s390_pv_vm_destroy(void) >>> +{ >>> + return s390_pv_cmd(KVM_PV_VM_DESTROY, NULL); >>> +} >>> + >>> +int s390_pv_vcpu_create(CPUState *cs) >>> +{ >>> + return s390_pv_cmd_vcpu(cs, KVM_PV_VCPU_CREATE, NULL); >>> +} >>> + >>> +int s390_pv_vcpu_destroy(CPUState *cs) >>> +{ >>> + S390CPU *cpu = S390_CPU(cs); >>> + CPUS390XState *env = &cpu->env; >>> + int rc; >>> + >>> + rc = s390_pv_cmd_vcpu(cs, KVM_PV_VCPU_DESTROY, NULL); >>> + if (!rc) { >>> + env->pv = false; >>> + } >>> + return rc; >>> +} >>> + >>> +int s390_pv_set_sec_parms(uint64_t origin, uint64_t length) >>> +{ >>> + struct kvm_s390_pv_sec_parm args = { >>> + .origin = origin, >>> + .length = length, >>> + }; >>> + >>> + return s390_pv_cmd(KVM_PV_VM_SET_SEC_PARMS, &args); >>> +} >>> + >>> +/* >>> + * Called for each component in the SE type IPL parameter block 0. >>> + */ >>> +int s390_pv_unpack(uint64_t addr, uint64_t size, uint64_t tweak) >>> +{ >>> + struct kvm_s390_pv_unp args = { >>> + .addr = addr, >>> + .size = size, >>> + .tweak = tweak, >>> + }; >>> + >>> + return s390_pv_cmd(KVM_PV_VM_UNPACK, &args); >>> +} >>> + >>> +int s390_pv_perf_clear_reset(void) >>> +{ >>> + return s390_pv_cmd(KVM_PV_VM_PERF_CLEAR_RESET, NULL); >>> +} >>> + >>> +int s390_pv_verify(void) >>> +{ >>> + return s390_pv_cmd(KVM_PV_VM_VERIFY, NULL); >>> +} >>> + >>> +int s390_pv_unshare(void) >>> +{ >>> + return s390_pv_cmd(KVM_PV_VM_UNSHARE, NULL); >>> +} >>> diff --git a/hw/s390x/pv.h b/hw/s390x/pv.h >>> new file mode 100644 >>> index 0000000000..eb074e4bc9 >>> --- /dev/null >>> +++ b/hw/s390x/pv.h >>> @@ -0,0 +1,26 @@ >>> +/* >>> + * Protected Virtualization header >>> + * >>> + * Copyright IBM Corp. 2019 >>> + * Author(s): >>> + * Janosch Frank <frankja@linux.ibm.com> >>> + * >>> + * This work is licensed under the terms of the GNU GPL, version 2 or (at >>> + * your option) any later version. See the COPYING file in the top-level >>> + * directory. >>> + */ >>> + >>> +#ifndef HW_S390_PV_H >>> +#define HW_S390_PV_H >>> + >>> +int s390_pv_vm_create(void); >>> +int s390_pv_vm_destroy(void); >>> +int s390_pv_vcpu_destroy(CPUState *cs); >>> +int s390_pv_vcpu_create(CPUState *cs); >>> +int s390_pv_set_sec_parms(uint64_t origin, uint64_t length); >>> +int s390_pv_unpack(uint64_t addr, uint64_t size, uint64_t tweak); >>> +int s390_pv_perf_clear_reset(void); >>> +int s390_pv_verify(void); >>> +int s390_pv_unshare(void); >> >> I still think you should make all those functions returning "void" >> instead of "int" - since errors results in an exit() in s390_pv_cmd() >> and s390_pv_cmd_vcpu() anyway... > > Hey Thomas, > > I have requested an error code for diag 308 subcode 10 that tells the > VM, that we didn't succeed starting a secure guest. Once that is in > place, I'll need to check the return codes. Ok, but then the exit()s need to go away, I assume? Thomas
On 12/4/19 12:34 PM, Thomas Huth wrote: > On 04/12/2019 12.32, Janosch Frank wrote: >> On 12/4/19 11:48 AM, Thomas Huth wrote: >>> On 29/11/2019 10.47, Janosch Frank wrote: >>>> When a guest has saved a ipib of type 5 and call diagnose308 with >>>> subcode 10, we have to setup the protected processing environment via >>>> Ultravisor calls. The calls are done by KVM and are exposed via an API. >>>> >>>> The following steps are necessary: >>>> 1. Create a VM (register it with the Ultravisor) >>>> 2. Create secure CPUs for all of our current cpus >>>> 3. Forward the secure header to the Ultravisor (has all information on >>>> how to decrypt the image and VM information) >>>> 4. Protect image pages from the host and decrypt them >>>> 5. Verify the image integrity >>>> >>>> Only after step 5 a protected VM is allowed to run. >>>> >>>> Signed-off-by: Janosch Frank <frankja@linux.ibm.com> >>>> --- >>> [...] >>>> +++ b/hw/s390x/pv.c >>>> @@ -0,0 +1,118 @@ >>>> +/* >>>> + * Secure execution functions >>>> + * >>>> + * Copyright IBM Corp. 2019 >>>> + * Author(s): >>>> + * Janosch Frank <frankja@linux.ibm.com> >>>> + * >>>> + * This work is licensed under the terms of the GNU GPL, version 2 or (at >>>> + * your option) any later version. See the COPYING file in the top-level >>>> + * directory. >>>> + */ >>>> +#include "qemu/osdep.h" >>>> +#include <sys/ioctl.h> >>>> + >>>> +#include <linux/kvm.h> >>>> + >>>> +#include "qemu/error-report.h" >>>> +#include "sysemu/kvm.h" >>>> +#include "pv.h" >>>> + >>>> +static int s390_pv_cmd(uint32_t cmd, void *data) >>>> +{ >>>> + int rc; >>>> + struct kvm_pv_cmd pv_cmd = { >>>> + .cmd = cmd, >>>> + .data = (uint64_t)data, >>>> + }; >>>> + >>>> + rc = kvm_vm_ioctl(kvm_state, KVM_S390_PV_COMMAND, &pv_cmd); >>>> + if (rc) { >>>> + error_report("KVM PV command failed cmd: %d rc: %d", cmd, rc); >>>> + exit(1); >>>> + } >>>> + return rc; >>>> +} >>>> + >>>> +static int s390_pv_cmd_vcpu(CPUState *cs, uint32_t cmd, void *data) >>>> +{ >>>> + int rc; >>>> + struct kvm_pv_cmd pv_cmd = { >>>> + .cmd = cmd, >>>> + .data = (uint64_t)data, >>>> + }; >>>> + >>>> + rc = kvm_vcpu_ioctl(cs, KVM_S390_PV_COMMAND_VCPU, &pv_cmd); >>>> + if (rc) { >>>> + error_report("KVM PV VCPU command failed cmd: %d rc: %d", cmd, rc); >>>> + exit(1); >>>> + } >>>> + return rc; >>>> +} >>>> + >>>> +int s390_pv_vm_create(void) >>>> +{ >>>> + return s390_pv_cmd(KVM_PV_VM_CREATE, NULL); >>>> +} >>>> + >>>> +int s390_pv_vm_destroy(void) >>>> +{ >>>> + return s390_pv_cmd(KVM_PV_VM_DESTROY, NULL); >>>> +} >>>> + >>>> +int s390_pv_vcpu_create(CPUState *cs) >>>> +{ >>>> + return s390_pv_cmd_vcpu(cs, KVM_PV_VCPU_CREATE, NULL); >>>> +} >>>> + >>>> +int s390_pv_vcpu_destroy(CPUState *cs) >>>> +{ >>>> + S390CPU *cpu = S390_CPU(cs); >>>> + CPUS390XState *env = &cpu->env; >>>> + int rc; >>>> + >>>> + rc = s390_pv_cmd_vcpu(cs, KVM_PV_VCPU_DESTROY, NULL); >>>> + if (!rc) { >>>> + env->pv = false; >>>> + } >>>> + return rc; >>>> +} >>>> + >>>> +int s390_pv_set_sec_parms(uint64_t origin, uint64_t length) >>>> +{ >>>> + struct kvm_s390_pv_sec_parm args = { >>>> + .origin = origin, >>>> + .length = length, >>>> + }; >>>> + >>>> + return s390_pv_cmd(KVM_PV_VM_SET_SEC_PARMS, &args); >>>> +} >>>> + >>>> +/* >>>> + * Called for each component in the SE type IPL parameter block 0. >>>> + */ >>>> +int s390_pv_unpack(uint64_t addr, uint64_t size, uint64_t tweak) >>>> +{ >>>> + struct kvm_s390_pv_unp args = { >>>> + .addr = addr, >>>> + .size = size, >>>> + .tweak = tweak, >>>> + }; >>>> + >>>> + return s390_pv_cmd(KVM_PV_VM_UNPACK, &args); >>>> +} >>>> + >>>> +int s390_pv_perf_clear_reset(void) >>>> +{ >>>> + return s390_pv_cmd(KVM_PV_VM_PERF_CLEAR_RESET, NULL); >>>> +} >>>> + >>>> +int s390_pv_verify(void) >>>> +{ >>>> + return s390_pv_cmd(KVM_PV_VM_VERIFY, NULL); >>>> +} >>>> + >>>> +int s390_pv_unshare(void) >>>> +{ >>>> + return s390_pv_cmd(KVM_PV_VM_UNSHARE, NULL); >>>> +} >>>> diff --git a/hw/s390x/pv.h b/hw/s390x/pv.h >>>> new file mode 100644 >>>> index 0000000000..eb074e4bc9 >>>> --- /dev/null >>>> +++ b/hw/s390x/pv.h >>>> @@ -0,0 +1,26 @@ >>>> +/* >>>> + * Protected Virtualization header >>>> + * >>>> + * Copyright IBM Corp. 2019 >>>> + * Author(s): >>>> + * Janosch Frank <frankja@linux.ibm.com> >>>> + * >>>> + * This work is licensed under the terms of the GNU GPL, version 2 or (at >>>> + * your option) any later version. See the COPYING file in the top-level >>>> + * directory. >>>> + */ >>>> + >>>> +#ifndef HW_S390_PV_H >>>> +#define HW_S390_PV_H >>>> + >>>> +int s390_pv_vm_create(void); >>>> +int s390_pv_vm_destroy(void); >>>> +int s390_pv_vcpu_destroy(CPUState *cs); >>>> +int s390_pv_vcpu_create(CPUState *cs); >>>> +int s390_pv_set_sec_parms(uint64_t origin, uint64_t length); >>>> +int s390_pv_unpack(uint64_t addr, uint64_t size, uint64_t tweak); >>>> +int s390_pv_perf_clear_reset(void); >>>> +int s390_pv_verify(void); >>>> +int s390_pv_unshare(void); >>> >>> I still think you should make all those functions returning "void" >>> instead of "int" - since errors results in an exit() in s390_pv_cmd() >>> and s390_pv_cmd_vcpu() anyway... >> >> Hey Thomas, >> >> I have requested an error code for diag 308 subcode 10 that tells the >> VM, that we didn't succeed starting a secure guest. Once that is in >> place, I'll need to check the return codes. > > Ok, but then the exit()s need to go away, I assume? That would be necessary to wire the rc up, yes. > > Thomas >
diff --git a/hw/s390x/Makefile.objs b/hw/s390x/Makefile.objs index e02ed80b68..a46a1c7894 100644 --- a/hw/s390x/Makefile.objs +++ b/hw/s390x/Makefile.objs @@ -31,6 +31,7 @@ obj-y += tod-qemu.o obj-$(CONFIG_KVM) += tod-kvm.o obj-$(CONFIG_KVM) += s390-skeys-kvm.o obj-$(CONFIG_KVM) += s390-stattrib-kvm.o +obj-$(CONFIG_KVM) += pv.o obj-y += s390-ccw.o obj-y += ap-device.o obj-y += ap-bridge.o diff --git a/hw/s390x/ipl.c b/hw/s390x/ipl.c index a077926f36..50501fcd27 100644 --- a/hw/s390x/ipl.c +++ b/hw/s390x/ipl.c @@ -33,6 +33,7 @@ #include "qemu/cutils.h" #include "qemu/option.h" #include "exec/exec-all.h" +#include "pv.h" #define KERN_IMAGE_START 0x010000UL #define LINUX_MAGIC_ADDR 0x010008UL @@ -668,6 +669,38 @@ static void s390_ipl_prepare_qipl(S390CPU *cpu) cpu_physical_memory_unmap(addr, len, 1, len); } +int s390_ipl_prepare_pv_header(void) +{ + int rc; + IplParameterBlock *iplb = s390_ipl_get_iplb_secure(); + IPLBlockPV *ipib_pv = &iplb->pv; + void *hdr = g_malloc(ipib_pv->pv_header_len); + + cpu_physical_memory_read(ipib_pv->pv_header_addr, hdr, + ipib_pv->pv_header_len); + rc = s390_pv_set_sec_parms((uint64_t)hdr, + ipib_pv->pv_header_len); + g_free(hdr); + return rc; +} + +int s390_ipl_pv_unpack(void) +{ + int i, rc; + IplParameterBlock *iplb = s390_ipl_get_iplb_secure(); + IPLBlockPV *ipib_pv = &iplb->pv; + + for (i = 0; i < ipib_pv->num_comp; i++) { + rc = s390_pv_unpack(ipib_pv->components[i].addr, + TARGET_PAGE_ALIGN(ipib_pv->components[i].size), + ipib_pv->components[i].tweak_pref); + if (rc) { + return rc; + } + } + return rc; +} + void s390_ipl_prepare_cpu(S390CPU *cpu) { S390IPLState *ipl = get_ipl_device(); diff --git a/hw/s390x/ipl.h b/hw/s390x/ipl.h index 7b8a493509..e848602c16 100644 --- a/hw/s390x/ipl.h +++ b/hw/s390x/ipl.h @@ -105,6 +105,8 @@ typedef union IplParameterBlock IplParameterBlock; int s390_ipl_set_loadparm(uint8_t *loadparm); int s390_ipl_pv_check_comp(IplParameterBlock *iplb); void s390_ipl_update_diag308(IplParameterBlock *iplb); +int s390_ipl_prepare_pv_header(void); +int s390_ipl_pv_unpack(void); void s390_ipl_prepare_cpu(S390CPU *cpu); IplParameterBlock *s390_ipl_get_iplb(void); IplParameterBlock *s390_ipl_get_iplb_secure(void); diff --git a/hw/s390x/pv.c b/hw/s390x/pv.c new file mode 100644 index 0000000000..0218070322 --- /dev/null +++ b/hw/s390x/pv.c @@ -0,0 +1,118 @@ +/* + * Secure execution functions + * + * Copyright IBM Corp. 2019 + * Author(s): + * Janosch Frank <frankja@linux.ibm.com> + * + * This work is licensed under the terms of the GNU GPL, version 2 or (at + * your option) any later version. See the COPYING file in the top-level + * directory. + */ +#include "qemu/osdep.h" +#include <sys/ioctl.h> + +#include <linux/kvm.h> + +#include "qemu/error-report.h" +#include "sysemu/kvm.h" +#include "pv.h" + +static int s390_pv_cmd(uint32_t cmd, void *data) +{ + int rc; + struct kvm_pv_cmd pv_cmd = { + .cmd = cmd, + .data = (uint64_t)data, + }; + + rc = kvm_vm_ioctl(kvm_state, KVM_S390_PV_COMMAND, &pv_cmd); + if (rc) { + error_report("KVM PV command failed cmd: %d rc: %d", cmd, rc); + exit(1); + } + return rc; +} + +static int s390_pv_cmd_vcpu(CPUState *cs, uint32_t cmd, void *data) +{ + int rc; + struct kvm_pv_cmd pv_cmd = { + .cmd = cmd, + .data = (uint64_t)data, + }; + + rc = kvm_vcpu_ioctl(cs, KVM_S390_PV_COMMAND_VCPU, &pv_cmd); + if (rc) { + error_report("KVM PV VCPU command failed cmd: %d rc: %d", cmd, rc); + exit(1); + } + return rc; +} + +int s390_pv_vm_create(void) +{ + return s390_pv_cmd(KVM_PV_VM_CREATE, NULL); +} + +int s390_pv_vm_destroy(void) +{ + return s390_pv_cmd(KVM_PV_VM_DESTROY, NULL); +} + +int s390_pv_vcpu_create(CPUState *cs) +{ + return s390_pv_cmd_vcpu(cs, KVM_PV_VCPU_CREATE, NULL); +} + +int s390_pv_vcpu_destroy(CPUState *cs) +{ + S390CPU *cpu = S390_CPU(cs); + CPUS390XState *env = &cpu->env; + int rc; + + rc = s390_pv_cmd_vcpu(cs, KVM_PV_VCPU_DESTROY, NULL); + if (!rc) { + env->pv = false; + } + return rc; +} + +int s390_pv_set_sec_parms(uint64_t origin, uint64_t length) +{ + struct kvm_s390_pv_sec_parm args = { + .origin = origin, + .length = length, + }; + + return s390_pv_cmd(KVM_PV_VM_SET_SEC_PARMS, &args); +} + +/* + * Called for each component in the SE type IPL parameter block 0. + */ +int s390_pv_unpack(uint64_t addr, uint64_t size, uint64_t tweak) +{ + struct kvm_s390_pv_unp args = { + .addr = addr, + .size = size, + .tweak = tweak, + }; + + return s390_pv_cmd(KVM_PV_VM_UNPACK, &args); +} + +int s390_pv_perf_clear_reset(void) +{ + return s390_pv_cmd(KVM_PV_VM_PERF_CLEAR_RESET, NULL); +} + +int s390_pv_verify(void) +{ + return s390_pv_cmd(KVM_PV_VM_VERIFY, NULL); +} + +int s390_pv_unshare(void) +{ + return s390_pv_cmd(KVM_PV_VM_UNSHARE, NULL); +} diff --git a/hw/s390x/pv.h b/hw/s390x/pv.h new file mode 100644 index 0000000000..eb074e4bc9 --- /dev/null +++ b/hw/s390x/pv.h @@ -0,0 +1,26 @@ +/* + * Protected Virtualization header + * + * Copyright IBM Corp. 2019 + * Author(s): + * Janosch Frank <frankja@linux.ibm.com> + * + * This work is licensed under the terms of the GNU GPL, version 2 or (at + * your option) any later version. See the COPYING file in the top-level + * directory. + */ + +#ifndef HW_S390_PV_H +#define HW_S390_PV_H + +int s390_pv_vm_create(void); +int s390_pv_vm_destroy(void); +int s390_pv_vcpu_destroy(CPUState *cs); +int s390_pv_vcpu_create(CPUState *cs); +int s390_pv_set_sec_parms(uint64_t origin, uint64_t length); +int s390_pv_unpack(uint64_t addr, uint64_t size, uint64_t tweak); +int s390_pv_perf_clear_reset(void); +int s390_pv_verify(void); +int s390_pv_unshare(void); + +#endif /* HW_S390_PV_H */ diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c index c1d1440272..f9481ccace 100644 --- a/hw/s390x/s390-virtio-ccw.c +++ b/hw/s390x/s390-virtio-ccw.c @@ -41,6 +41,7 @@ #include "hw/qdev-properties.h" #include "hw/s390x/tod.h" #include "sysemu/sysemu.h" +#include "hw/s390x/pv.h" S390CPU *s390_cpu_addr2state(uint16_t cpu_addr) { @@ -322,6 +323,7 @@ static void s390_machine_reset(MachineState *machine) { enum s390_reset reset_type; CPUState *cs, *t; + S390CPU *cpu; /* get the reset parameters, reset them once done */ s390_ipl_get_reset_request(&cs, &reset_type); @@ -329,6 +331,8 @@ static void s390_machine_reset(MachineState *machine) /* all CPUs are paused and synchronized at this point */ s390_cmma_reset(); + cpu = S390_CPU(cs); + switch (reset_type) { case S390_RESET_EXTERNAL: case S390_RESET_REIPL: @@ -357,6 +361,28 @@ static void s390_machine_reset(MachineState *machine) run_on_cpu(cs, s390_do_cpu_initial_reset, RUN_ON_CPU_NULL); run_on_cpu(cs, s390_do_cpu_load_normal, RUN_ON_CPU_NULL); break; + case S390_RESET_PV: /* Subcode 10 */ + subsystem_reset(); + s390_crypto_reset(); + + CPU_FOREACH(t) { + run_on_cpu(t, s390_do_cpu_full_reset, RUN_ON_CPU_NULL); + } + + /* Create SE VM */ + s390_pv_vm_create(); + CPU_FOREACH(t) { + s390_pv_vcpu_create(t); + } + + /* Set SE header and unpack */ + s390_ipl_prepare_pv_header(); + /* Decrypt image */ + s390_ipl_pv_unpack(); + /* Verify integrity */ + s390_pv_verify(); + s390_cpu_set_state(S390_CPU_STATE_OPERATING, cpu); + break; default: g_assert_not_reached(); } diff --git a/target/s390x/cpu_features_def.inc.h b/target/s390x/cpu_features_def.inc.h index 31dff0d84e..60db28351d 100644 --- a/target/s390x/cpu_features_def.inc.h +++ b/target/s390x/cpu_features_def.inc.h @@ -107,6 +107,7 @@ DEF_FEAT(DEFLATE_BASE, "deflate-base", STFL, 151, "Deflate-conversion facility ( DEF_FEAT(VECTOR_PACKED_DECIMAL_ENH, "vxpdeh", STFL, 152, "Vector-Packed-Decimal-Enhancement Facility") DEF_FEAT(MSA_EXT_9, "msa9-base", STFL, 155, "Message-security-assist-extension-9 facility (excluding subfunctions)") DEF_FEAT(ETOKEN, "etoken", STFL, 156, "Etoken facility") +DEF_FEAT(UNPACK, "unpack", STFL, 161, "Unpack facility") /* Features exposed via SCLP SCCB Byte 80 - 98 (bit numbers relative to byte-80) */ DEF_FEAT(SIE_GSLS, "gsls", SCLP_CONF_CHAR, 40, "SIE: Guest-storage-limit-suppression facility")
When a guest has saved a ipib of type 5 and call diagnose308 with subcode 10, we have to setup the protected processing environment via Ultravisor calls. The calls are done by KVM and are exposed via an API. The following steps are necessary: 1. Create a VM (register it with the Ultravisor) 2. Create secure CPUs for all of our current cpus 3. Forward the secure header to the Ultravisor (has all information on how to decrypt the image and VM information) 4. Protect image pages from the host and decrypt them 5. Verify the image integrity Only after step 5 a protected VM is allowed to run. Signed-off-by: Janosch Frank <frankja@linux.ibm.com> --- hw/s390x/Makefile.objs | 1 + hw/s390x/ipl.c | 33 ++++++++ hw/s390x/ipl.h | 2 + hw/s390x/pv.c | 118 ++++++++++++++++++++++++++++ hw/s390x/pv.h | 26 ++++++ hw/s390x/s390-virtio-ccw.c | 26 ++++++ target/s390x/cpu_features_def.inc.h | 1 + 7 files changed, 207 insertions(+) create mode 100644 hw/s390x/pv.c create mode 100644 hw/s390x/pv.h