linux-kernel - [PATCH 11/16] KVM-HDR: KVM Steal time implementation

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Date:	Mon, 24 Jan 2011 13:06:32 -0500
From:	Glauber Costa <glommer@...hat.com>
To:	kvm@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, aliguori@...ibm.com,
	Rik van Riel <riel@...hat.com>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Avi Kivity <avi@...hat.com>
Subject: [PATCH 11/16] KVM-HDR: KVM Steal time implementation

To implement steal time, we need the hypervisor to pass the guest information
about how much time was spent running other processes outside the VM.
This is per-vcpu, and using the kvmclock structure for that is an abuse
we decided not to make.

This patch contains the headers for it. I am keeping it separate to facilitate
backports to people who wants to backport the kernel part but not the
hypervisor, or the other way around.

Signed-off-by: Glauber Costa <glommer@...hat.com>
CC: Rik van Riel <riel@...hat.com>
CC: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
CC: Peter Zijlstra <peterz@...radead.org>
CC: Avi Kivity <avi@...hat.com>
---
 arch/x86/include/asm/kvm_para.h |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/kvm_para.h b/arch/x86/include/asm/kvm_para.h
index 4df93cf..1ca49d8 100644
--- a/arch/x86/include/asm/kvm_para.h
+++ b/arch/x86/include/asm/kvm_para.h
@@ -46,8 +46,13 @@ struct kvm_memory_area {
 	__u8  pad[3];
 };
 
+struct kvm_steal_time {
+	__u64 steal;
+};
+
 #define KVM_AREA_WALLCLOCK		1
 #define KVM_AREA_SYSTIME		2
+#define KVM_AREA_STEAL_TIME		3
 
 #define KVM_MAX_MMU_OP_BATCH           32
 
-- 
1.7.2.3

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