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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 09:53:14 +0300 |
| commit | 728802730843fe2d76a45767564bad987e9cd3ec (patch) | |
| tree | 79690aa20f10066cb9aae511f7ebd24f96c3892a /drivers/md/dm-cache-target.c | |
| parent | b8d0b1a4288240fbf96cbfaa1a7784ffdd8a7c74 (diff) | |
| download | linux-728802730843fe2d76a45767564bad987e9cd3ec.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 'drivers/md/dm-cache-target.c')
0 files changed, 0 insertions, 0 deletions