linux-kernel - [027/156] KVM: x86: Add KVM_CAP_X86_ROBUST

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Message-Id: <20100330224737.353185340@linux.site>
Date:	Tue, 30 Mar 2010 15:41:01 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org,
	Greg KH <greg@...ah.com>
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Avi Kivity <avi@...hat.com>,
	Jan Kiszka <jan.kiszka@...mens.com>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [027/156] KVM: x86: Add KVM_CAP_X86_ROBUST_SINGLESTEP

2.6.33-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Jan Kiszka <jan.kiszka@...mens.com>

Commit d2be1651b736002e0c76d7095d6c0ba77b4a897c upstream.

This marks the guest single-step API improvement of 94fe45da and
91586a3b with a capability flag to allow reliable detection by user
space.

Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 arch/x86/kvm/x86.c  |    1 +
 include/linux/kvm.h |    1 +
 2 files changed, 2 insertions(+)

--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1351,6 +1351,7 @@ int kvm_dev_ioctl_check_extension(long e
 	case KVM_CAP_XEN_HVM:
 	case KVM_CAP_ADJUST_CLOCK:
 	case KVM_CAP_VCPU_EVENTS:
+	case KVM_CAP_X86_ROBUST_SINGLESTEP:
 		r = 1;
 		break;
 	case KVM_CAP_COALESCED_MMIO:
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -497,6 +497,7 @@ struct kvm_ioeventfd {
 #endif
 #define KVM_CAP_S390_PSW 42
 #define KVM_CAP_PPC_SEGSTATE 43
+#define KVM_CAP_X86_ROBUST_SINGLESTEP 51
 
 #ifdef KVM_CAP_IRQ_ROUTING
 


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