diff options
| author | Kan Liang <[email protected]> | 2020-05-28 08:19:27 -0700 |
|---|---|---|
| committer | Peter Zijlstra <[email protected]> | 2020-06-15 14:09:50 +0200 |
| commit | 2af834f1faab3f1e218fcbcab70a399121620d62 (patch) | |
| tree | abae24877c31eec012374abc3b761515ad918256 /lib/mpi/mpi-div.c | |
| parent | 548e1f6c76e1eb80ba29edd4286b9b9f2c37f5bf (diff) | |
perf/x86/intel/uncore: Fix oops when counting IMC uncore events on some TGL
When counting IMC uncore events on some TGL machines, an oops will be
triggered.
[ 393.101262] BUG: unable to handle page fault for address:
ffffb45200e15858
[ 393.101269] #PF: supervisor read access in kernel mode
[ 393.101271] #PF: error_code(0x0000) - not-present page
Current perf uncore driver still use the IMC MAP SIZE inherited from
SNB, which is 0x6000.
However, the offset of IMC uncore counters is larger than 0x6000,
e.g. 0xd8a0.
Enlarge the IMC MAP SIZE for TGL to 0xe000.
Fixes: fdb64822443e ("perf/x86: Add Intel Tiger Lake uncore support")
Reported-by: Ammy Yi <[email protected]>
Signed-off-by: Kan Liang <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Tested-by: Ammy Yi <[email protected]>
Tested-by: Chao Qin <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'lib/mpi/mpi-div.c')
0 files changed, 0 insertions, 0 deletions