kselftest/arm64: Correct buffer size for SME ZA storage

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It looks like a copy-paste error to describe the ZA buffer size using (the
number of P registers * the maximum size of a Z register). This doesn't
have practical impact though as we're always allocating enough space even
for the architectural maximum ZA storage, with SVL equals to 2048 bits.

Switch to use ZA_SIG_REGS_SIZE(SVE_VQ_MAX). setup_za() will need to
initialize two 64MB arraies with this change and can be optimized later (if
someone complain).

Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20221218092942.1940-2-yuzenghui@huawei.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Zenghui Yu 2022-12-18 17:29:42 +08:00 • committed by Catalin Marinas

parent 00598857e3

commit daac835347

1 changed files with 2 additions and 2 deletions

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tools/testing/selftests/arm64/abi/syscall-abi.c

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