| Message ID | 1538141967-15375-9-git-send-email-Dave.Martin@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | KVM: arm64: Initial support for SVE guests | expand |
Dave Martin <Dave.Martin@arm.com> writes: > Since SVE will be enabled or disabled on a per-vcpu basis, a flag > is needed in order to track which vcpus have it enabled. > > This patch adds a suitable flag and a helper for checking it. > > Signed-off-by: Dave Martin <Dave.Martin@arm.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> > --- > > Changes since RFCv1: > > * Convert vcpu_has_sve() to a macro so that it can operate on a vcpu > without circular header dependency problems. > > This avoids the helper requiring a vcpu_arch argument, which was > a little ugly. > --- > arch/arm64/include/asm/kvm_host.h | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h > index d4b65414..20baf4a 100644 > --- a/arch/arm64/include/asm/kvm_host.h > +++ b/arch/arm64/include/asm/kvm_host.h > @@ -307,6 +307,10 @@ struct kvm_vcpu_arch { > #define KVM_ARM64_FP_HOST (1 << 2) /* host FP regs loaded */ > #define KVM_ARM64_HOST_SVE_IN_USE (1 << 3) /* backup for host TIF_SVE */ > #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 vcpu_has_sve(vcpu) (system_supports_sve() && \ > + ((vcpu)->arch.flags & KVM_ARM64_GUEST_HAS_SVE)) > > #define vcpu_gp_regs(v) (&(v)->arch.ctxt.gp_regs) -- Alex Bennée
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index d4b65414..20baf4a 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -307,6 +307,10 @@ struct kvm_vcpu_arch { #define KVM_ARM64_FP_HOST (1 << 2) /* host FP regs loaded */ #define KVM_ARM64_HOST_SVE_IN_USE (1 << 3) /* backup for host TIF_SVE */ #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 vcpu_has_sve(vcpu) (system_supports_sve() && \ + ((vcpu)->arch.flags & KVM_ARM64_GUEST_HAS_SVE)) #define vcpu_gp_regs(v) (&(v)->arch.ctxt.gp_regs)
Since SVE will be enabled or disabled on a per-vcpu basis, a flag is needed in order to track which vcpus have it enabled. This patch adds a suitable flag and a helper for checking it. Signed-off-by: Dave Martin <Dave.Martin@arm.com> --- Changes since RFCv1: * Convert vcpu_has_sve() to a macro so that it can operate on a vcpu without circular header dependency problems. This avoids the helper requiring a vcpu_arch argument, which was a little ugly. --- arch/arm64/include/asm/kvm_host.h | 4 ++++ 1 file changed, 4 insertions(+)