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KVM: VMX: Shadow VMCS pin controls

Telusuri Sumber 
Prepare to shadow all major control fields on a per-VMCS basis, which
allows KVM to avoid costly VMWRITEs when switching between vmcs01 and
vmcs02.

Shadowing pin controls also allows a future patch to remove the per-VMCS
'hv_timer_armed' flag, as the shadow copy is a superset of said flag.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson
2019-05-07 12:17:55 -07:00
committed by Paolo Bonzini
orang tua 70f932ecdf
melakukan c5f2c76643
3 mengubah file dengan 8 tambahan dan 7 penghapusan
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10
arch/x86/kvm/vmx/vmx.c
Melihat File

@@ -3844,7 +3844,7 @@ static void vmx_refresh_apicv_exec_ctrl(struct kvm_vcpu *vcpu)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
vmcs_write32(PIN_BASED_VM_EXEC_CONTROL, vmx_pin_based_exec_ctrl(vmx));
pin_controls_set(vmx, vmx_pin_based_exec_ctrl(vmx));
if (cpu_has_secondary_exec_ctrls()) {
if (kvm_vcpu_apicv_active(vcpu))
vmcs_set_bits(SECONDARY_VM_EXEC_CONTROL,
@@ -4042,7 +4042,7 @@ static void vmx_vcpu_setup(struct vcpu_vmx *vmx)
vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */
/* Control */
vmcs_write32(PIN_BASED_VM_EXEC_CONTROL, vmx_pin_based_exec_ctrl(vmx));
pin_controls_init(vmx, vmx_pin_based_exec_ctrl(vmx));
vmx->hv_deadline_tsc = -1;
vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, vmx_exec_control(vmx));
@@ -6366,8 +6366,7 @@ static void vmx_arm_hv_timer(struct vcpu_vmx *vmx, u32 val)
{
vmcs_write32(VMX_PREEMPTION_TIMER_VALUE, val);
if (!vmx->loaded_vmcs->hv_timer_armed)
vmcs_set_bits(PIN_BASED_VM_EXEC_CONTROL,
PIN_BASED_VMX_PREEMPTION_TIMER);
pin_controls_setbit(vmx, PIN_BASED_VMX_PREEMPTION_TIMER);
vmx->loaded_vmcs->hv_timer_armed = true;
}
@@ -6396,8 +6395,7 @@ static void vmx_update_hv_timer(struct kvm_vcpu *vcpu)
}
if (vmx->loaded_vmcs->hv_timer_armed)
vmcs_clear_bits(PIN_BASED_VM_EXEC_CONTROL,
PIN_BASED_VMX_PREEMPTION_TIMER);
pin_controls_clearbit(vmx, PIN_BASED_VMX_PREEMPTION_TIMER);
vmx->loaded_vmcs->hv_timer_armed = false;
}