Il 16/06/2014 19:02, Bandan Das ha scritto:
> - vmcs_write64(GUEST_IA32_DEBUGCTL, vmcs12->guest_ia32_debugctl);
> + if (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_DEBUG_CONTROLS) {
> + kvm_set_dr(vcpu, 7, vmcs12->guest_dr7);
> + vmcs_write64(GUEST_IA32_DEBUGCTL, vmcs12->guest_i
Jan Kiszka writes:
...
> /* cpu-based controls */
> rdmsr(MSR_IA32_VMX_PROCBASED_CTLS,
> nested_vmx_procbased_ctls_low, nested_vmx_procbased_ctls_high);
> @@ -2409,11 +2422,17 @@ static int vmx_get_vmx_msr(struct kvm_vcpu *vcpu, u32
> msr_index, u64 *pdata)
>
Allow L1 to "leak" its debug controls into L2, i.e. permit cleared
VM_{ENTRY_LOAD,EXIT_SAVE}_DEBUG_CONTROLS. This requires to manually
transfer the state of DR7 and IA32_DEBUGCTLMSR from L1 into L2 as both
run on different VMCS.
Signed-off-by: Jan Kiszka
---
arch/x86/kvm/vmx.c | 44 +
