[PATCH v7 8/10] KVM: arm64: Add capability to advertise ptrauth for guest
From: Amit Daniel Kachhap <hidden>
Date: 2019-03-19 08:31:51
Also in:
kvmarm, lkml
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine (kvm), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Paolo Bonzini, Marc Zyngier, Oliver Upton, Linus Torvalds
This patch advertises the capability of pointer authentication when system supports pointer authentication and VHE mode present. Signed-off-by: Amit Daniel Kachhap <redacted> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Marc Zyngier <redacted> Cc: Christoffer Dall <redacted> Cc: kvmarm@lists.cs.columbia.edu --- arch/arm64/kvm/reset.c | 4 ++++ include/uapi/linux/kvm.h | 1 + 2 files changed, 5 insertions(+)
diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c
index 00f0639..a3b269e 100644
--- a/arch/arm64/kvm/reset.c
+++ b/arch/arm64/kvm/reset.c@@ -92,6 +92,10 @@ int kvm_arch_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_ARM_VM_IPA_SIZE: r = kvm_ipa_limit; break; + case KVM_CAP_ARM_PTRAUTH: + 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 6d4ea4b..a553477 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h@@ -988,6 +988,7 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_ARM_VM_IPA_SIZE 165 #define KVM_CAP_MANUAL_DIRTY_LOG_PROTECT 166 #define KVM_CAP_HYPERV_CPUID 167 +#define KVM_CAP_ARM_PTRAUTH 168 #ifdef KVM_CAP_IRQ_ROUTING
--
2.7.4
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