| From | Vitaly Kuznetsov <> | Subject | [PATCH v5 26/26] KVM: nVMX: Use cached host MSR_IA32_VMX_MISC value for setting up nested MSR | Date | Tue, 2 Aug 2022 18:07:56 +0200 |
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vmcs_config has cached host MSR_IA32_VMX_MISC value, use it for setting up nested MSR_IA32_VMX_MISC in nested_vmx_setup_ctls_msrs() and avoid the redundant rdmsr().
No (real) functional change intended.
Reviewed-by: Jim Mattson <jmattson@google.com> Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> --- arch/x86/kvm/vmx/nested.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index 036a28c96947..7f8fa47e9396 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -6742,10 +6742,7 @@ void nested_vmx_setup_ctls_msrs(struct vmcs_config *vmcs_conf, u32 ept_caps) msrs->secondary_ctls_high |= SECONDARY_EXEC_ENCLS_EXITING; /* miscellaneous data */ - rdmsr(MSR_IA32_VMX_MISC, - msrs->misc_low, - msrs->misc_high); - msrs->misc_low &= VMX_MISC_SAVE_EFER_LMA; + msrs->misc_low = (u32)vmcs_conf->misc & VMX_MISC_SAVE_EFER_LMA; msrs->misc_low |= MSR_IA32_VMX_MISC_VMWRITE_SHADOW_RO_FIELDS | VMX_MISC_EMULATED_PREEMPTION_TIMER_RATE | -- 2.35.3
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