diff options
| -rw-r--r-- | Documentation/virtual/kvm/api.txt | 14 | ||||
| -rw-r--r-- | arch/arm64/kvm/reset.c | 5 | ||||
| -rw-r--r-- | include/uapi/linux/kvm.h | 2 |
3 files changed, 17 insertions, 4 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index 32afe7f5c35a..fac1887f25b5 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -2763,13 +2763,19 @@ Possible features: - KVM_ARM_VCPU_PTRAUTH_ADDRESS: Enables Address Pointer authentication for arm64 only. - Both KVM_ARM_VCPU_PTRAUTH_ADDRESS and KVM_ARM_VCPU_PTRAUTH_GENERIC - must be requested or neither must be requested. + Depends on KVM_CAP_ARM_PTRAUTH_ADDRESS. + If KVM_CAP_ARM_PTRAUTH_ADDRESS and KVM_CAP_ARM_PTRAUTH_GENERIC are + both present, then both KVM_ARM_VCPU_PTRAUTH_ADDRESS and + KVM_ARM_VCPU_PTRAUTH_GENERIC must be requested or neither must be + requested. - KVM_ARM_VCPU_PTRAUTH_GENERIC: Enables Generic Pointer authentication for arm64 only. - Both KVM_ARM_VCPU_PTRAUTH_ADDRESS and KVM_ARM_VCPU_PTRAUTH_GENERIC - must be requested or neither must be requested. + Depends on KVM_CAP_ARM_PTRAUTH_GENERIC. + If KVM_CAP_ARM_PTRAUTH_ADDRESS and KVM_CAP_ARM_PTRAUTH_GENERIC are + both present, then both KVM_ARM_VCPU_PTRAUTH_ADDRESS and + KVM_ARM_VCPU_PTRAUTH_GENERIC must be requested or neither must be + requested. - KVM_ARM_VCPU_SVE: Enables SVE for the CPU (arm64 only). Depends on KVM_CAP_ARM_SVE. diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c index 028d0c604652..f0faf54f5857 100644 --- a/arch/arm64/kvm/reset.c +++ b/arch/arm64/kvm/reset.c @@ -101,6 +101,11 @@ int kvm_arch_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_ARM_SVE: r = system_supports_sve(); break; + case KVM_CAP_ARM_PTRAUTH_ADDRESS: + case KVM_CAP_ARM_PTRAUTH_GENERIC: + r = has_vhe() && system_supports_address_auth() && + system_supports_generic_auth(); + break; default: r = 0; } diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 1d564445b515..4dc34f8e29f6 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -989,6 +989,8 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_MANUAL_DIRTY_LOG_PROTECT 166 #define KVM_CAP_HYPERV_CPUID 167 #define KVM_CAP_ARM_SVE 168 +#define KVM_CAP_ARM_PTRAUTH_ADDRESS 169 +#define KVM_CAP_ARM_PTRAUTH_GENERIC 170 #ifdef KVM_CAP_IRQ_ROUTING |