[PATCH RFC v1 10/10] KVM: nVMX: Use cached host MSR_IA32_VMX_MISC value for setting up nested MSR

From: Vitaly Kuznetsov
Date: Wed Jun 22 2022 - 12:45:49 EST


Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
---
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 ede6314a641e..97d0c9fa4444 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -6738,10 +6738,7 @@ 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