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KVM: arm64: Add a capability to advertise SVE support

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To provide a uniform way to check for KVM SVE support amongst other
features, this patch adds a suitable capability KVM_CAP_ARM_SVE,
and reports it as present when SVE is available.

Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Reviewed-by: Julien Thierry <julien.thierry@arm.com>
Tested-by: zhang.lei <zhang.lei@jp.fujitsu.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Dave Martin 2019-01-15 12:21:22 +00:00 committed by Marc Zyngier
parent 9a3cdf26e3
commit 555f3d03e7
2 changed files with 4 additions and 0 deletions
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3
arch/arm64/kvm/reset.c
View file

@ -98,6 +98,9 @@ int kvm_arch_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_ARM_VM_IPA_SIZE: case KVM_CAP_ARM_VM_IPA_SIZE:
r = kvm_ipa_limit; r = kvm_ipa_limit;
break; break;
case KVM_CAP_ARM_SVE:
r = system_supports_sve();
break;
default: default:
r = 0; r = 0;
} }

1
include/uapi/linux/kvm.h
View file

@ -988,6 +988,7 @@ struct kvm_ppc_resize_hpt {
#define KVM_CAP_ARM_VM_IPA_SIZE 165 #define KVM_CAP_ARM_VM_IPA_SIZE 165
#define KVM_CAP_MANUAL_DIRTY_LOG_PROTECT 166 #define KVM_CAP_MANUAL_DIRTY_LOG_PROTECT 166
#define KVM_CAP_HYPERV_CPUID 167 #define KVM_CAP_HYPERV_CPUID 167
#define KVM_CAP_ARM_SVE 168
#ifdef KVM_CAP_IRQ_ROUTING #ifdef KVM_CAP_IRQ_ROUTING