diff options
| author | Roedel, Joerg <Joerg.Roedel@amd.com> | 2011-05-19 11:13:39 +0200 |
|---|---|---|
| committer | Andi Kleen <ak@linux.intel.com> | 2011-08-01 13:54:51 -0700 |
| commit | b399e568ca3b163bdaeb121e0f3d735fb21d1f5b (patch) | |
| tree | 0244917a7ce3d68a10b5bf58615dbcc403ff816c /lib | |
| parent | 6dcd6090760630cfcc8016b1c0382c1c50d42810 (diff) | |
x86, amd: Use _safe() msr access for GartTlbWlk disable code
commit d47cc0db8fd6011de2248df505fc34990b7451bf upstream.
The workaround for Bugzilla:
https://bugzilla.kernel.org/show_bug.cgi?id=33012
introduced a read and a write to the MC4 mask msr.
Unfortunatly this MSR is not emulated by the KVM hypervisor
so that the kernel will get a #GP and crashes when applying
this workaround when running inside KVM.
This issue was reported as:
https://bugzilla.kernel.org/show_bug.cgi?id=35132
and is fixed with this patch. The change just let the kernel
ignore any #GP it gets while accessing this MSR by using the
_safe msr access methods.
Reported-by: Török Edwin <edwintorok@gmail.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Maciej Rutecki <maciej.rutecki@gmail.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions