mirror of https://gitee.com/openkylin/linux.git
KVM: vmx: write HOST_IA32_EFER in vmx_set_constant_host_state()
EFER is constant in the host and writing it once during setup means we can skip writing the host value in add_atomic_switch_msr_special(). Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Reviewed-by: Jim Mattson <jmattson@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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@ -2696,7 +2696,8 @@ static void add_atomic_switch_msr_special(struct vcpu_vmx *vmx,
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u64 guest_val, u64 host_val)
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{
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vmcs_write64(guest_val_vmcs, guest_val);
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vmcs_write64(host_val_vmcs, host_val);
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if (host_val_vmcs != HOST_IA32_EFER)
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vmcs_write64(host_val_vmcs, host_val);
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vm_entry_controls_setbit(vmx, entry);
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vm_exit_controls_setbit(vmx, exit);
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}
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@ -6333,6 +6334,9 @@ static void vmx_set_constant_host_state(struct vcpu_vmx *vmx)
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rdmsr(MSR_IA32_CR_PAT, low32, high32);
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vmcs_write64(HOST_IA32_PAT, low32 | ((u64) high32 << 32));
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}
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if (cpu_has_load_ia32_efer)
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vmcs_write64(HOST_IA32_EFER, host_efer);
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}
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static void set_cr4_guest_host_mask(struct vcpu_vmx *vmx)
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