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KVM: VMX: use vmcs_clear/set_bits for debug register exits

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Reviewed-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2016-02-26 12:09:49 +01:00
parent b2740d3533
commit 8f22372f85
1 changed files with 3 additions and 11 deletions
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14
arch/x86/kvm/vmx.c
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@ -5619,11 +5619,8 @@ static int handle_dr(struct kvm_vcpu *vcpu)
}
if (vcpu->guest_debug == 0) {
u32 cpu_based_vm_exec_control;
cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
cpu_based_vm_exec_control &= ~CPU_BASED_MOV_DR_EXITING;
vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
vmcs_clear_bits(CPU_BASED_VM_EXEC_CONTROL,
CPU_BASED_MOV_DR_EXITING);
/*
* No more DR vmexits; force a reload of the debug registers
@ -5660,8 +5657,6 @@ static void vmx_set_dr6(struct kvm_vcpu *vcpu, unsigned long val)
static void vmx_sync_dirty_debug_regs(struct kvm_vcpu *vcpu)
{
u32 cpu_based_vm_exec_control;
get_debugreg(vcpu->arch.db[0], 0);
get_debugreg(vcpu->arch.db[1], 1);
get_debugreg(vcpu->arch.db[2], 2);
@ -5670,10 +5665,7 @@ static void vmx_sync_dirty_debug_regs(struct kvm_vcpu *vcpu)
vcpu->arch.dr7 = vmcs_readl(GUEST_DR7);
vcpu->arch.switch_db_regs &= ~KVM_DEBUGREG_WONT_EXIT;
cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
cpu_based_vm_exec_control |= CPU_BASED_MOV_DR_EXITING;
vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
vmcs_set_bits(CPU_BASED_VM_EXEC_CONTROL, CPU_BASED_MOV_DR_EXITING);
}
static void vmx_set_dr7(struct kvm_vcpu *vcpu, unsigned long val)