On Tue, Apr 23, 2019 at 10:12:34AM +0530, Amit Daniel Kachhap wrote: > A per vcpu flag is added to check if pointer authentication is > enabled for the vcpu or not. This flag may be enabled according to > the necessary user policies and host capabilities. > > This patch also adds a helper to check the flag. > > Reviewed-by: Dave Martin <[email protected]> > Signed-off-by: Amit Daniel Kachhap <[email protected]> > Cc: Mark Rutland <[email protected]> > Cc: Marc Zyngier <[email protected]> > Cc: Christoffer Dall <[email protected]> > Cc: [email protected] > --- > Changes since v9: > > * Added ptrauth cpufeature static check in vcpu_has_ptrauth [Marc Zyngier]. > > arch/arm64/include/asm/kvm_host.h | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/arch/arm64/include/asm/kvm_host.h > b/arch/arm64/include/asm/kvm_host.h > index 7a096fd..7ccac42 100644 > --- a/arch/arm64/include/asm/kvm_host.h > +++ b/arch/arm64/include/asm/kvm_host.h > @@ -355,10 +355,15 @@ struct kvm_vcpu_arch { > #define KVM_ARM64_HOST_SVE_ENABLED (1 << 4) /* SVE enabled for EL0 */ > #define KVM_ARM64_GUEST_HAS_SVE (1 << 5) /* SVE exposed to > guest */ > #define KVM_ARM64_VCPU_SVE_FINALIZED (1 << 6) /* SVE config completed */ > +#define KVM_ARM64_GUEST_HAS_PTRAUTH (1 << 7) /* PTRAUTH exposed to guest */ > > #define vcpu_has_sve(vcpu) (system_supports_sve() && \ > ((vcpu)->arch.flags & KVM_ARM64_GUEST_HAS_SVE)) > > +#define vcpu_has_ptrauth(vcpu) ((system_supports_address_auth() || \ > + system_supports_generic_auth()) && \
Come to think of it, should this be system_supports_address_auth() _&&_ system_supports_generic_auth()? It won't make a functional difference today though, since today kvm_vcpu_enable_ptrauth() won't set KVM_ARM64_GUEST_HAS_PTRAUTH without system_supports_address_auth() and system_supports_generic_auth() both true. With || here, we won't have to change this if supporting the two auth types independently in the future though. Either way, my Reviewed-by stands. Cheers ---Dave _______________________________________________ kvmarm mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
