Commit f80ae0ef authored by Vitaly Kuznetsov's avatar Vitaly Kuznetsov Committed by Paolo Bonzini
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KVM: nVMX: Also filter MSR_IA32_VMX_TRUE_PINBASED_CTLS when eVMCS 



Similar to MSR_IA32_VMX_EXIT_CTLS/MSR_IA32_VMX_TRUE_EXIT_CTLS,
MSR_IA32_VMX_ENTRY_CTLS/MSR_IA32_VMX_TRUE_ENTRY_CTLS pair,
MSR_IA32_VMX_TRUE_PINBASED_CTLS needs to be filtered the same way
MSR_IA32_VMX_PINBASED_CTLS is currently filtered as guests may solely rely
on 'true' MSR data.

Note, none of the currently existing Windows/Hyper-V versions are known
to stumble upon the unfiltered MSR_IA32_VMX_TRUE_PINBASED_CTLS, the change
is aimed at making the filtering future proof.

Signed-off-by: default avatarVitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20220112170134.1904308-2-vkuznets@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent b19c99b9

arch/x86/kvm/vmx/evmcs.c

+1 −0
Original line number Diff line number Diff line
@@ -362,6 +362,7 @@ void nested_evmcs_filter_control_msr(u32 msr_index, u64 *pdata) 
	case MSR_IA32_VMX_PROCBASED_CTLS2:

		ctl_high &= ~EVMCS1_UNSUPPORTED_2NDEXEC;

		break;

	case MSR_IA32_VMX_TRUE_PINBASED_CTLS:

	case MSR_IA32_VMX_PINBASED_CTLS:

		ctl_high &= ~EVMCS1_UNSUPPORTED_PINCTRL;

		break;