Jan Beulich
2009-Aug-03 14:37 UTC
[Xen-devel] [PATCH] linux/x86-64: fix Dom0 boot on AMD K8 CPUs
The workaround in question here should be (and is being) applied by the
hypervisor (which doesn''t allow any guest - including Dom0 - to write
other than all zeroes or all ones into MCi_CTL).
As usual, written and tested on 2.6.31-rc4 and made apply to the 2.6.18
tree without further testing.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
--- a/arch/x86_64/kernel/mce.c
+++ b/arch/x86_64/kernel/mce.c
@@ -369,9 +369,11 @@ static void __cpuinit mce_cpu_quirks(stru
{
/* This should be disabled by the BIOS, but isn''t always */
if (c->x86_vendor == X86_VENDOR_AMD && c->x86 == 15) {
+#ifndef CONFIG_XEN
/* disable GART TBL walk error reporting, which trips off
incorrectly with the IOMMU & 3ware & Cerberus. */
clear_bit(10, &bank[4]);
+#endif
/* Lots of broken BIOS around that don''t clear them
by default and leave crap in there. Don''t log. */
mce_bootlog = 0;
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