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| author |   Eric Biggers <ebiggers@google.com> | 2025-02-10 09:26:44 -0800 |
|---|---|---|
| committer | Eric Biggers <ebiggers@google.com> | 2025-02-10 09:48:43 -0800 |
| commit | 968e9bc4cef87054741db81a0d94d5c1f67d518a (patch) | |
| tree | 3eaa29bb90163459e61b913fad4aa6237cc7d67c /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | lib/crc-t10dif: remove crc_t10dif_is_optimized() (diff) | |
| download | linux-rng-968e9bc4cef87054741db81a0d94d5c1f67d518a.tar.xz linux-rng-968e9bc4cef87054741db81a0d94d5c1f67d518a.zip | |
x86: move ZMM exclusion list into CPU feature flag
Lift zmm_exclusion_list in aesni-intel_glue.c into the x86 CPU setup
code, and add a new x86 CPU feature flag X86_FEATURE_PREFER_YMM that is
set when the CPU is on this list.
This allows other code in arch/x86/, such as the CRC library code, to
apply the same exclusion list when deciding whether to execute 256-bit
or 512-bit optimized functions.
Note that full AVX512 support including ZMM registers is still exposed
to userspace and is still supported for in-kernel use. This flag just
indicates whether in-kernel code should prefer to use YMM registers.
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: "Martin K. Petersen" <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20250210174540.161705-2-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions