KVM: nVMX: Use adjusted pin controls for vmcs02

KVM provides a module parameter to allow disabling virtual NMI support
to simplify testing (hardware *without* virtual NMI support is hard to
come by but it does have users).  When preparing vmcs02, use the accessor
for pin controls to ensure that the module param is respected for nested
guests.

Opportunistically swap the order of applying L0's and L1's pin controls
to better align with other controls and to prepare for a future patche
that will ignore L1's, but not L0's, preemption timer flag.

Fixes: d02fcf50779ec ("kvm: vmx: Allow disabling virtual NMI support")
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 3cb257b..cd33f31 100644 (file)
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -2013,10 +2013,9 @@ static void prepare_vmcs02_early(struct vcpu_vmx *vmx, struct vmcs12 *vmcs12)
        /*
         * PIN CONTROLS
         */
-       exec_control = vmcs12->pin_based_vm_exec_control;
-
+       exec_control = vmx_pin_based_exec_ctrl(vmx);
+       exec_control |= vmcs12->pin_based_vm_exec_control;
        /* Preemption timer setting is computed directly in vmx_vcpu_run.  */
-       exec_control |= vmcs_config.pin_based_exec_ctrl;
        exec_control &= ~PIN_BASED_VMX_PREEMPTION_TIMER;
        vmx->loaded_vmcs->hv_timer_armed = false;
 

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index a74936a..0e722fa 100644 (file)
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -3825,7 +3825,7 @@ void set_cr4_guest_host_mask(struct vcpu_vmx *vmx)
        vmcs_writel(CR4_GUEST_HOST_MASK, ~vmx->vcpu.arch.cr4_guest_owned_bits);
 }
 
-static u32 vmx_pin_based_exec_ctrl(struct vcpu_vmx *vmx)
+u32 vmx_pin_based_exec_ctrl(struct vcpu_vmx *vmx)
 {
        u32 pin_based_exec_ctrl = vmcs_config.pin_based_exec_ctrl;
 

diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h
index 613f272..7f67f32 100644 (file)
--- a/arch/x86/kvm/vmx/vmx.h
+++ b/arch/x86/kvm/vmx/vmx.h
@@ -480,6 +480,7 @@ static inline u32 vmx_vmexit_ctrl(void)
 }
 
 u32 vmx_exec_control(struct vcpu_vmx *vmx);
+u32 vmx_pin_based_exec_ctrl(struct vcpu_vmx *vmx);
 
 static inline struct kvm_vmx *to_kvm_vmx(struct kvm *kvm)
 {