Commit 1ab46fd3 authored May 30, 2012 by Konrad Rzeszutek Wilk Committed by H. Peter Anvin May 30, 2012

x86, amd, xen: Avoid NULL pointer paravirt references



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 <andre.przywara@amd.com>
Link: http://lkml.kernel.org/r/20120530222356.GA28417@andromeda.dapyr.net


Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: <stable@vger.kernel.org>

parent 2da06af8

arch/x86/xen/enlighten.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -1116,7 +1116,10 @@ static const struct pv_cpu_ops xen_cpu_ops __initconst = {
		.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,

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