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| author | Desnes A. Nunes do Rosario <desnesn@linux.ibm.com> | 2020-02-27 10:47:15 -0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-02-28 10:09:33 +1100 |
| commit | fc37a1632d40c80c067eb1bc235139f5867a2667 (patch) | |
| tree | 3d2cc770e40e05a4072d7affee44e15d12cdaa5c /net/lapb/lapb_timer.c | |
| parent | cb0cc635c7a9fa8a3a0f75d4d896721819c63add (diff) | |
| download | lwn-fc37a1632d40c80c067eb1bc235139f5867a2667.tar.gz lwn-fc37a1632d40c80c067eb1bc235139f5867a2667.zip | |
powerpc: fix hardware PMU exception bug on PowerVM compatibility mode systems
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
Diffstat (limited to 'net/lapb/lapb_timer.c')
0 files changed, 0 insertions, 0 deletions