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| author | Andrew Jones <drjones@redhat.com> | 2020-08-04 19:06:04 +0200 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2020-08-21 15:05:19 +0200 |
| commit | 004a01241c5a0d375266ebf1c72f208de99294e9 (patch) | |
| tree | 956e8aee5d5a69cbbdf3d5dff427bae747a003b1 /arch/arm64/kvm/pvtime.c | |
| parent | KVM: Documentation: Minor fixups (diff) | |
| download | linux-004a01241c5a0d375266ebf1c72f208de99294e9.tar.xz 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 'arch/arm64/kvm/pvtime.c')
| -rw-r--r-- | arch/arm64/kvm/pvtime.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/kvm/pvtime.c b/arch/arm64/kvm/pvtime.c index 75234321d896..920ac43077ad 100644 --- a/arch/arm64/kvm/pvtime.c +++ b/arch/arm64/kvm/pvtime.c @@ -71,7 +71,7 @@ gpa_t kvm_init_stolen_time(struct kvm_vcpu *vcpu) return base; } -static bool kvm_arm_pvtime_supported(void) +bool kvm_arm_pvtime_supported(void) { return !!sched_info_on(); } |