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| author | Desnes A. Nunes do Rosario <desnesn@linux.ibm.com> | 2020-02-27 16:47:15 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-03-11 16:15:12 +0300 |
| commit | f9493be8eea714e2b3025a6ff381120d6e1a1a34 (patch) | |
| tree | e247458fc523d756f5476e08c410e0554e0e0611 /certs | |
| parent | 8fb8f0931dceab928206771eb0ffaf197e94641f (diff) | |
| download | linux-f9493be8eea714e2b3025a6ff381120d6e1a1a34.tar.xz | |
powerpc: fix hardware PMU exception bug on PowerVM compatibility mode systems
commit fc37a1632d40c80c067eb1bc235139f5867a2667 upstream.
PowerVM systems running compatibility mode on a few Power8 revisions are
still vulnerable to the hardware defect that loses PMU exceptions arriving
prior to a context switch.
The software fix for this issue is enabled through the CPU_FTR_PMAO_BUG
cpu_feature bit, nevertheless this bit also needs to be set for PowerVM
compatibility mode systems.
Fixes: 68f2f0d431d9ea4 ("powerpc: Add a cpu feature CPU_FTR_PMAO_BUG")
Signed-off-by: Desnes A. Nunes do Rosario <desnesn@linux.ibm.com>
Reviewed-by: Leonardo Bras <leonardo@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200227134715.9715-1-desnesn@linux.ibm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'certs')
0 files changed, 0 insertions, 0 deletions