This is a note to let you know that I've just added the patch titled
x86, amd, xen: Avoid NULL pointer paravirt references
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
x86-amd-xen-avoid-null-pointer-paravirt-references.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 1ab46fd319bcf1fcd9fb6311727d532b580e4eba Mon Sep 17 00:00:00 2001
From: Konrad Rzeszutek Wilk <[email protected]>
Date: Wed, 30 May 2012 18:23:56 -0400
Subject: x86, amd, xen: Avoid NULL pointer paravirt references
From: Konrad Rzeszutek Wilk <[email protected]>
commit 1ab46fd319bcf1fcd9fb6311727d532b580e4eba upstream.
Stub out MSR methods that aren't actually needed. This fixes a crash
as Xen Dom0 on AMD Trinity systems. A bigger patch should be added to
remove the paravirt machinery completely for the methods which
apparently have no users!
Reported-by: Andre Przywara <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: H. Peter Anvin <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/x86/xen/enlighten.c | 3 +++
1 file changed, 3 insertions(+)
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1106,7 +1106,10 @@ static const struct pv_cpu_ops xen_cpu_o
.wbinvd = native_wbinvd,
.read_msr = native_read_msr_safe,
+ .rdmsr_regs = native_rdmsr_safe_regs,
.write_msr = xen_write_msr_safe,
+ .wrmsr_regs = native_wrmsr_safe_regs,
+
.read_tsc = native_read_tsc,
.read_pmc = native_read_pmc,
Patches currently in stable-queue which might be from [email protected] are
queue-3.4/x86-amd-xen-avoid-null-pointer-paravirt-references.patch
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