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>
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 8cda444..e515030 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -1672,6 +1672,11 @@
__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 @@
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 @@
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 */