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| author | Oskar Senft <[email protected]> | 2018-03-23 13:11:30 +0000 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2018-04-20 11:17:50 +0000 |
| commit | 15a3e845b01ce2342cf187dc123c92c44c3c8170 (patch) | |
| tree | e06952a1062144a3a26001e74f4a347216499485 /drivers/fpga/fpga-region.c | |
| parent | perf/x86/intel/uncore: Revert "Remove SBOX support for Broadwell server" (diff) | |
| download | kernel-15a3e845b01ce2342cf187dc123c92c44c3c8170.tar.gz kernel-15a3e845b01ce2342cf187dc123c92c44c3c8170.zip | |
perf/x86/intel/uncore: Fix SBOX support for Broadwell CPUs
SBOX on some Broadwell CPUs is broken because it's enabled unconditionally
despite the fact that there are no SBOXes available.
Check the Power Control Unit CAPID4 register to determine the number of
available SBOXes on the particular CPU before trying to enable them. If
there are none, nullify the SBOX descriptor so it isn't tried to be
initialized.
Signed-off-by: Oskar Senft <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Tested-by: Mark van Dijk <[email protected]>
Reviewed-by: Kan Liang <[email protected]>
Acked-by: Peter Zijlstra <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'drivers/fpga/fpga-region.c')
0 files changed, 0 insertions, 0 deletions