diff options
| author |   Paolo Bonzini <pbonzini@redhat.com> | 2018-08-05 16:07:47 +0200 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2018-08-05 17:10:20 +0200 |
| commit | 5b76a3cff011df2dcb6186c965a2e4d809a05ad4 (patch) | |
| tree | fdff64d26521635cc33b223bccc9b465b5f57046 /arch/x86/include/asm/kvm_host.h | |
| parent | x86/speculation: Use ARCH_CAPABILITIES to skip L1D flush on vmentry (diff) | |
| download | linux-dev-5b76a3cff011df2dcb6186c965a2e4d809a05ad4.tar.xz linux-dev-5b76a3cff011df2dcb6186c965a2e4d809a05ad4.zip | |
KVM: VMX: Tell the nested hypervisor to skip L1D flush on vmentry
When nested virtualization is in use, VMENTER operations from the nested
hypervisor into the nested guest will always be processed by the bare metal
hypervisor, and KVM's "conditional cache flushes" mode in particular does a
flush on nested vmentry. Therefore, include the "skip L1D flush on
vmentry" bit in KVM's suggested ARCH_CAPABILITIES setting.
Add the relevant Documentation.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/include/asm/kvm_host.h')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 37749429afd9..acebb808c4b5 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1418,6 +1418,7 @@ int kvm_cpu_get_interrupt(struct kvm_vcpu *v); void kvm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event); void kvm_vcpu_reload_apic_access_page(struct kvm_vcpu *vcpu); +u64 kvm_get_arch_capabilities(void); void kvm_define_shared_msr(unsigned index, u32 msr); int kvm_set_shared_msr(unsigned index, u64 val, u64 mask); |