Commit 37d145ef authored by Vitaly Kuznetsov's avatar Vitaly Kuznetsov Committed by Paolo Bonzini
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KVM: nVMX: Use cached host MSR_IA32_VMX_MISC value for setting up nested MSR 



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: default avatarJim Mattson <jmattson@google.com>
Reviewed-by: default avatarMaxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: default avatarVitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20220830133737.1539624-34-vkuznets@redhat.com


Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 0809d9b0

arch/x86/kvm/vmx/nested.c

+1 −4
Original line number Diff line number Diff line
@@ -6758,10 +6758,7 @@ 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 |