Messages in this thread | | | Date | Thu, 10 Feb 2022 17:40:38 +0100 | Subject | Re: [PATCH MANUALSEL 5.10 2/6] KVM: nVMX: eVMCS: Filter out VM_EXIT_SAVE_VMX_PREEMPTION_TIMER | From | Paolo Bonzini <> |
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On 2/9/22 19:57, Sasha Levin wrote: > From: Vitaly Kuznetsov <vkuznets@redhat.com> > > [ Upstream commit 7a601e2cf61558dfd534a9ecaad09f5853ad8204 ]
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo
> Enlightened VMCS v1 doesn't have VMX_PREEMPTION_TIMER_VALUE field, > PIN_BASED_VMX_PREEMPTION_TIMER is also filtered out already so it makes > sense to filter out VM_EXIT_SAVE_VMX_PREEMPTION_TIMER too. > > Note, none of the currently existing Windows/Hyper-V versions are known > to enable 'save VMX-preemption timer value' when eVMCS is in use, the > change is aimed at making the filtering future proof. > > Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> > Message-Id: <20220112170134.1904308-3-vkuznets@redhat.com> > Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> > Signed-off-by: Sasha Levin <sashal@kernel.org> > --- > arch/x86/kvm/vmx/evmcs.h | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/arch/x86/kvm/vmx/evmcs.h b/arch/x86/kvm/vmx/evmcs.h > index bd41d9462355f..011929a638230 100644 > --- a/arch/x86/kvm/vmx/evmcs.h > +++ b/arch/x86/kvm/vmx/evmcs.h > @@ -59,7 +59,9 @@ DECLARE_STATIC_KEY_FALSE(enable_evmcs); > SECONDARY_EXEC_SHADOW_VMCS | \ > SECONDARY_EXEC_TSC_SCALING | \ > SECONDARY_EXEC_PAUSE_LOOP_EXITING) > -#define EVMCS1_UNSUPPORTED_VMEXIT_CTRL (VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL) > +#define EVMCS1_UNSUPPORTED_VMEXIT_CTRL \ > + (VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL | \ > + VM_EXIT_SAVE_VMX_PREEMPTION_TIMER) > #define EVMCS1_UNSUPPORTED_VMENTRY_CTRL (VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL) > #define EVMCS1_UNSUPPORTED_VMFUNC (VMX_VMFUNC_EPTP_SWITCHING) >
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