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| author |   Amit Daniel Kachhap <amit.kachhap@arm.com> | 2019-04-23 10:12:37 +0530 |
|---|---|---|
| committer |   Marc Zyngier <marc.zyngier@arm.com> | 2019-04-24 15:30:40 +0100 |
| commit | a243c16d18be130b17cf1064e9115de73bfdff5a (patch) | |
| tree | f13a46c8673a636ccf77125112a47d0ccfef97c3 /arch/arm64/kvm | |
| parent | KVM: arm64: Add userspace flag to enable pointer authentication (diff) | |
| download | linux-dev-a243c16d18be130b17cf1064e9115de73bfdff5a.tar.xz linux-dev-a243c16d18be130b17cf1064e9115de73bfdff5a.zip | |
KVM: arm64: Add capability to advertise ptrauth for guest
This patch advertises the capability of two cpu feature called address
pointer authentication and generic pointer authentication. These
capabilities depend upon system support for pointer authentication and
VHE mode.
The current arm64 KVM partially implements pointer authentication and
support of address/generic authentication are tied together. However,
separate ABI requirements for both of them is added so that any future
isolated implementation will not require any ABI changes.
Signed-off-by: Amit Daniel Kachhap <amit.kachhap@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Christoffer Dall <christoffer.dall@arm.com>
Cc: kvmarm@lists.cs.columbia.edu
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm64/kvm')
| -rw-r--r-- | arch/arm64/kvm/reset.c | 5 |
1 files changed, 5 insertions, 0 deletions
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; } |