From: Glauber Costa <glommer@redhat.com>
To: kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, avi@redhat.com, zamsden@redhat.com
Subject: [PATCH v3 4/8] add new KVMCLOCK cpuid feature
Date: Wed, 5 May 2010 17:27:15 -0400 [thread overview]
Message-ID: <1273094839-18655-5-git-send-email-glommer@redhat.com> (raw)
In-Reply-To: <1273094839-18655-4-git-send-email-glommer@redhat.com>
This cpuid, KVM_CPUID_CLOCKSOURCE2, will indicate to the guest
that kvmclock is available through a new set of MSRs. The old ones
are deprecated.
Signed-off-by: Glauber Costa <glommer@redhat.com>
---
arch/x86/include/asm/kvm_para.h | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/kvm_para.h b/arch/x86/include/asm/kvm_para.h
index 9734808..f019f8c 100644
--- a/arch/x86/include/asm/kvm_para.h
+++ b/arch/x86/include/asm/kvm_para.h
@@ -16,6 +16,10 @@
#define KVM_FEATURE_CLOCKSOURCE 0
#define KVM_FEATURE_NOP_IO_DELAY 1
#define KVM_FEATURE_MMU_OP 2
+/* This indicates that the new set of kvmclock msrs
+ * are available. The use of 0x11 and 0x12 is deprecated
+ */
+#define KVM_FEATURE_CLOCKSOURCE2 3
#define MSR_KVM_WALL_CLOCK 0x11
#define MSR_KVM_SYSTEM_TIME 0x12
--
1.6.2.2
next prev parent reply other threads:[~2010-05-05 21:31 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-05 21:27 [PATCH v3 0/8] pvclock fixes - v3 Glauber Costa
2010-05-05 21:27 ` [PATCH v3 1/8] Enable pvclock flags in vcpu_time_info structure Glauber Costa
2010-05-05 21:27 ` [PATCH v3 2/8] Add a global synchronization point for pvclock Glauber Costa
2010-05-05 21:27 ` [PATCH v3 3/8] change msr numbers for kvmclock Glauber Costa
2010-05-05 21:27 ` Glauber Costa [this message]
2010-05-05 21:27 ` [PATCH v3 5/8] export paravirtual cpuid flags in KVM_GET_SUPPORTED_CPUID Glauber Costa
2010-05-05 21:27 ` [PATCH v3 6/8] Try using new kvm clock msrs Glauber Costa
2010-05-05 21:27 ` [PATCH v3 7/8] don't compute pvclock adjustments if we trust the tsc Glauber Costa
2010-05-05 21:27 ` [PATCH v3 8/8] Tell the guest we'll warn it about tsc stability Glauber Costa
2010-05-11 8:29 ` [PATCH v3 5/8] export paravirtual cpuid flags in KVM_GET_SUPPORTED_CPUID Avi Kivity
2010-05-11 8:35 ` [PATCH v3 0/8] pvclock fixes - v3 Avi Kivity
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