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| author | Jan Kiszka <jan.kiszka@siemens.com> | 2013-03-03 13:05:44 +0100 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2013-03-05 01:37:28 +0100 |
| commit | 503cd0c50ac7161eb5c3891b48b620cb0a5521cd (patch) | |
| tree | 6376b4be8ae4a6df2e972b497b48bcac032aaa96 /arch | |
| parent | KVM: ARM: Remove kvm_arch_set_memory_region() (diff) | |
| download | linux-503cd0c50ac7161eb5c3891b48b620cb0a5521cd.tar.xz linux-503cd0c50ac7161eb5c3891b48b620cb0a5521cd.zip | |
KVM: nVMX: Fix switching of debug state
First of all, do not blindly overwrite GUEST_DR7 on L2 entry. The host
may have guest debugging enabled. Then properly reset DR7 and DEBUG_CTL
on L2->L1 switch as specified in the SDM.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 58fb7c27e3b5..097f5d662275 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -6978,7 +6978,7 @@ static void prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12) vmcs12->guest_interruptibility_info); vmcs_write32(GUEST_ACTIVITY_STATE, vmcs12->guest_activity_state); vmcs_write32(GUEST_SYSENTER_CS, vmcs12->guest_sysenter_cs); - vmcs_writel(GUEST_DR7, vmcs12->guest_dr7); + kvm_set_dr(vcpu, 7, vmcs12->guest_dr7); vmcs_writel(GUEST_RFLAGS, vmcs12->guest_rflags); vmcs_writel(GUEST_PENDING_DBG_EXCEPTIONS, vmcs12->guest_pending_dbg_exceptions); @@ -7492,6 +7492,9 @@ static void load_vmcs12_host_state(struct kvm_vcpu *vcpu, if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL) vmcs_write64(GUEST_IA32_PERF_GLOBAL_CTRL, vmcs12->host_ia32_perf_global_ctrl); + + kvm_set_dr(vcpu, 7, 0x400); + vmcs_write64(GUEST_IA32_DEBUGCTL, 0); } /* |