From: Dave Martin <Dave.Martin@xxxxxxx>
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@xxxxxxx>
Reviewed-by: Alex Bennée <alex.bennee@xxxxxxxxxx>
Tested-by: zhang.lei <zhang.lei@xxxxxxxxxxxxxx>
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
---
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 6d10100ff870..ad4f7f004498 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -328,6 +328,10 @@ 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)
--
2.20.1
