[ 3.5.yuz extended stable ] Patch "xen/bootup: allow read_tscp call for Xen PV guests." has been added to staging queue
Herton Ronaldo Krzesinski
herton.krzesinski at canonical.com
Thu Nov 15 05:50:21 UTC 2012
This is a note to let you know that I have just added a patch titled
xen/bootup: allow read_tscp call for Xen PV guests.
to the linux-3.5.y-queue branch of the 3.5.yuz extended stable tree
which can be found at:
http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.5.yuz tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Herton
------
>From 2e986cac30ba1afe4e03ba4f2e79556cc7846481 Mon Sep 17 00:00:00 2001
From: Konrad Rzeszutek Wilk <konrad.wilk at oracle.com>
Date: Wed, 10 Oct 2012 13:30:47 -0400
Subject: [PATCH] xen/bootup: allow read_tscp call for Xen PV guests.
commit cd0608e71e9757f4dae35bcfb4e88f4d1a03a8ab upstream.
The hypervisor will trap it. However without this patch,
we would crash as the .read_tscp is set to NULL. This patch
fixes it and sets it to the native_read_tscp call.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk at oracle.com>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski at canonical.com>
---
arch/x86/xen/enlighten.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 405307f..93dcfdc 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1131,6 +1131,8 @@ static const struct pv_cpu_ops xen_cpu_ops __initconst = {
.read_tsc = native_read_tsc,
.read_pmc = native_read_pmc,
+ .read_tscp = native_read_tscp,
+
.iret = xen_iret,
.irq_enable_sysexit = xen_sysexit,
#ifdef CONFIG_X86_64
--
1.7.9.5
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