diff options
author | Maciej Wieczor-Retman <[email protected]> | 2023-10-10 12:42:37 +0200 |
---|---|---|
committer | Borislav Petkov (AMD) <[email protected]> | 2023-10-11 21:48:52 +0200 |
commit | 0e3cd31f6e9074886dea5a999bfcc563d144e7de (patch) | |
tree | 66b98446f22df97be0ce4bbe61c1dd3fdafe274f /tools/perf/scripts/python/sched-migration.py | |
parent | 39c6eed1f61594f737160e498d29673edbd9eefd (diff) |
x86/resctrl: Enable non-contiguous CBMs in Intel CAT
The setting for non-contiguous 1s support in Intel CAT is
hardcoded to false. On these systems, writing non-contiguous
1s into the schemata file will fail before resctrl passes
the value to the hardware.
In Intel CAT CPUID.0x10.1:ECX[3] and CPUID.0x10.2:ECX[3] stopped
being reserved and now carry information about non-contiguous 1s
value support for L3 and L2 cache respectively. The CAT
capacity bitmask (CBM) supports a non-contiguous 1s value if
the bit is set.
The exception are Haswell systems where non-contiguous 1s value
support needs to stay disabled since they can't make use of CPUID
for Cache allocation.
Originally-by: Fenghua Yu <[email protected]>
Signed-off-by: Maciej Wieczor-Retman <[email protected]>
Signed-off-by: Borislav Petkov (AMD) <[email protected]>
Reviewed-by: Ilpo Järvinen <[email protected]>
Reviewed-by: Peter Newman <[email protected]>
Reviewed-by: Reinette Chatre <[email protected]>
Reviewed-by: Babu Moger <[email protected]>
Tested-by: Peter Newman <[email protected]>
Link: https://lore.kernel.org/r/1849b487256fe4de40b30f88450cba3d9abc9171.1696934091.git.maciej.wieczor-retman@intel.com
Diffstat (limited to 'tools/perf/scripts/python/sched-migration.py')
0 files changed, 0 insertions, 0 deletions