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| author | Paolo Bonzini <pbonzini@redhat.com> | 2018-08-05 17:07:47 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-08-05 18:10:20 +0300 |
| commit | 5b76a3cff011df2dcb6186c965a2e4d809a05ad4 (patch) | |
| tree | fdff64d26521635cc33b223bccc9b465b5f57046 /arch/x86/kvm/vmx.c | |
| parent | 8e0b2b916662e09dd4d09e5271cdf214c6b80e62 (diff) | |
| download | linux-5b76a3cff011df2dcb6186c965a2e4d809a05ad4.tar.xz | |
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/kvm/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 29d6eab6920e..58bba7a7572a 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -6465,8 +6465,7 @@ static void vmx_vcpu_setup(struct vcpu_vmx *vmx) ++vmx->nmsrs; } - if (boot_cpu_has(X86_FEATURE_ARCH_CAPABILITIES)) - rdmsrl(MSR_IA32_ARCH_CAPABILITIES, vmx->arch_capabilities); + vmx->arch_capabilities = kvm_get_arch_capabilities(); vm_exit_controls_init(vmx, vmcs_config.vmexit_ctrl); |