| commit | c2e37a2626a7471875f3a6452b99dfd3809972b9 | [log] [tgz] |
|---|---|---|
| author | Michael Ellerman <mpe@ellerman.id.au> | Fri Mar 14 16:00:29 2014 +1100 |
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | Mon Mar 24 09:48:25 2014 +1100 |
| tree | 60c994235d65095308288c8ee3543b1e027d2c92 | |
| parent | 68f2f0d431d9ea4fbd373cd31e828b0ceaefea30 [diff] |
powerpc/perf: Add lost exception workaround Some power8 revisions have a hardware bug where we can lose a PMU exception, this commit adds a workaround to detect the bad condition and rectify the situation. See the comment in the commit for a full description. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>