Commit d16c293e authored by Paolo Bonzini's avatar Paolo Bonzini
Browse files

KVM: nVMX: Allow nested guests to run with dirty debug registers 



When preparing the VMCS02, the CPU-based execution controls is computed
by vmx_exec_control.  Turn off DR access exits there, too, if the
KVM_DEBUGREG_WONT_EXIT bit is set in switch_db_regs.

Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 81908bf4

arch/x86/kvm/vmx.c

+4 −0
Original line number Diff line number Diff line
@@ -4242,6 +4242,10 @@ static u32 vmx_pin_based_exec_ctrl(struct vcpu_vmx *vmx) 
static u32 vmx_exec_control(struct vcpu_vmx *vmx)

{

	u32 exec_control = vmcs_config.cpu_based_exec_ctrl;



	if (vmx->vcpu.arch.switch_db_regs & KVM_DEBUGREG_WONT_EXIT)

		exec_control &= ~CPU_BASED_MOV_DR_EXITING;



	if (!vm_need_tpr_shadow(vmx->vcpu.kvm)) {

		exec_control &= ~CPU_BASED_TPR_SHADOW;

#ifdef CONFIG_X86_64

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