KVM: x86: Add KVM_CAP_X86_ROBUST_SINGLESTEP

This marks the guest single-step API improvement of 94fe45d and 91586a3 with a capability flag to allow reliable detection by user space. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: stable@kernel.org (2.6.33) Signed-off-by: Avi Kivity <avi@redhat.com>
git-mirror · Mar 1, 2010 · d2be165 · d2be165
1 parent c573cd2
commit d2be165
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diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
@@ -1570,6 +1570,7 @@ int kvm_dev_ioctl_check_extension(long ext)
 	case KVM_CAP_HYPERV_VAPIC:
 	case KVM_CAP_HYPERV_SPIN:
 	case KVM_CAP_PCI_SEGMENT:
+	case KVM_CAP_X86_ROBUST_SINGLESTEP:
 		r = 1;
 		break;
 	case KVM_CAP_COALESCED_MMIO:

diff --git a/include/linux/kvm.h b/include/linux/kvm.h
@@ -501,6 +501,7 @@ struct kvm_ioeventfd {
 #define KVM_CAP_HYPERV_VAPIC 45
 #define KVM_CAP_HYPERV_SPIN 46
 #define KVM_CAP_PCI_SEGMENT 47
+#define KVM_CAP_X86_ROBUST_SINGLESTEP 51
 
 #ifdef KVM_CAP_IRQ_ROUTING