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| author | Andre Przywara <[email protected]> | 2012-06-01 16:52:37 +0200 |
|---|---|---|
| committer | H. Peter Anvin <[email protected]> | 2012-06-07 11:43:30 -0700 |
| commit | 169e9cbd77db23fe50bc8ba68bf081adb67b4220 (patch) | |
| tree | befeef8f305e9d16852dd27d18fdbbf1ef85a31d /tools/perf/scripts/python/syscall-counts-by-pid.py | |
| parent | ecd431d95aa04257e977fd6878e4203ce462e7e9 (diff) | |
x86, cpu, amd: Fix crash as Xen Dom0 on AMD Trinity systems
f7f286a910221 ("x86/amd: Re-enable CPU topology extensions in case BIOS
has disabled it") wrongfully added code which used the AMD-specific
{rd,wr}msr variants for no real reason.
This caused boot panics on xen which wasn't initializing the
{rd,wr}msr_safe_regs pv_ops members properly.
This, in turn, caused a heated discussion leading to us reviewing all
uses of the AMD-specific variants and removing them where unneeded
(almost everywhere except an obscure K8 BIOS fix, see 6b0f43ddfa358).
Finally, this patch switches to the standard {rd,wr}msr*_safe* variants
which should've been used in the first place anyway and avoided unneeded
excitation with xen.
Signed-off-by: Andre Przywara <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Cc: Andreas Herrmann <[email protected]>
Link: <http://lkml.kernel.org/r/[email protected]>
[Boris: correct and expand commit message]
Signed-off-by: Borislav Petkov <[email protected]>
Acked-by: Konrad Rzeszutek Wilk <[email protected]>
Signed-off-by: H. Peter Anvin <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts-by-pid.py')
0 files changed, 0 insertions, 0 deletions