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authorAndrew Jones <drjones@redhat.com>2020-08-04 19:06:04 +0200
committerMarc Zyngier <maz@kernel.org>2020-08-21 14:05:19 +0100
commit004a01241c5a0d375266ebf1c72f208de99294e9 (patch)
tree956e8aee5d5a69cbbdf3d5dff427bae747a003b1 /include
parentKVM: Documentation: Minor fixups (diff)
downloadwireguard-linux-004a01241c5a0d375266ebf1c72f208de99294e9.tar.xz
wireguard-linux-004a01241c5a0d375266ebf1c72f208de99294e9.zip
arm64/x86: KVM: Introduce steal-time cap
arm64 requires a vcpu fd (KVM_HAS_DEVICE_ATTR vcpu ioctl) to probe support for steal-time. However this is unnecessary, as only a KVM fd is required, and it complicates userspace (userspace may prefer delaying vcpu creation until after feature probing). Introduce a cap that can be checked instead. While x86 can already probe steal-time support with a kvm fd (KVM_GET_SUPPORTED_CPUID), we add the cap there too for consistency. Signed-off-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Reviewed-by: Steven Price <steven.price@arm.com> Link: https://lore.kernel.org/r/20200804170604.42662-7-drjones@redhat.com
Diffstat (limited to 'include')
-rw-r--r--include/uapi/linux/kvm.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index f6d86033c4fa..3d8023474f2a 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -1035,6 +1035,7 @@ struct kvm_ppc_resize_hpt {
#define KVM_CAP_LAST_CPU 184
#define KVM_CAP_SMALLER_MAXPHYADDR 185
#define KVM_CAP_S390_DIAG318 186
+#define KVM_CAP_STEAL_TIME 187
#ifdef KVM_CAP_IRQ_ROUTING