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| author | Paolo Bonzini <pbonzini@redhat.com> | 2016-07-07 14:58:33 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-07-11 10:07:49 +0200 |
| commit | 8391ce447f18476273331399a7f5930e5494bf46 (patch) | |
| tree | 778a5086653e55a2c1835457ecfadb6b79b2b62b /arch/x86/kvm/vmx.c | |
| parent | KVM: nVMX: keep preemption timer enabled during L2 execution (diff) | |
| download | linux-8391ce447f18476273331399a7f5930e5494bf46.tar.xz linux-8391ce447f18476273331399a7f5930e5494bf46.zip | |
KVM: VMX: introduce vm_{entry,exit}_control_reset_shadow
There is no reason to read the entry/exit control fields of the
VMCS and immediately write back the same value.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 8cda4449a60e..e51503063181 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -1672,6 +1672,11 @@ static __always_inline void vmcs_set_bits(unsigned long field, u32 mask) __vmcs_writel(field, __vmcs_readl(field) | mask); } +static inline void vm_entry_controls_reset_shadow(struct vcpu_vmx *vmx) +{ + vmx->vm_entry_controls_shadow = vmcs_read32(VM_ENTRY_CONTROLS); +} + static inline void vm_entry_controls_init(struct vcpu_vmx *vmx, u32 val) { vmcs_write32(VM_ENTRY_CONTROLS, val); @@ -1700,6 +1705,11 @@ static inline void vm_entry_controls_clearbit(struct vcpu_vmx *vmx, u32 val) vm_entry_controls_set(vmx, vm_entry_controls_get(vmx) & ~val); } +static inline void vm_exit_controls_reset_shadow(struct vcpu_vmx *vmx) +{ + vmx->vm_exit_controls_shadow = vmcs_read32(VM_EXIT_CONTROLS); +} + static inline void vm_exit_controls_init(struct vcpu_vmx *vmx, u32 val) { vmcs_write32(VM_EXIT_CONTROLS, val); @@ -10722,8 +10732,8 @@ static void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 exit_reason, vmcs12->vm_exit_intr_error_code, KVM_ISA_VMX); - vm_entry_controls_init(vmx, vmcs_read32(VM_ENTRY_CONTROLS)); - vm_exit_controls_init(vmx, vmcs_read32(VM_EXIT_CONTROLS)); + vm_entry_controls_reset_shadow(vmx); + vm_exit_controls_reset_shadow(vmx); vmx_segment_cache_clear(vmx); /* if no vmcs02 cache requested, remove the one we used */ |