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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>
This commit is contained in:
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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4
tools/testing/selftests/arm64/abi/syscall-abi.c
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@ -300,8 +300,8 @@ static int check_svcr(struct syscall_cfg *cfg, int sve_vl, int sme_vl,
return errors;
}
uint8_t za_in[SVE_NUM_PREGS * __SVE_ZREG_SIZE(SVE_VQ_MAX)];
uint8_t za_out[SVE_NUM_PREGS * __SVE_ZREG_SIZE(SVE_VQ_MAX)];
uint8_t za_in[ZA_SIG_REGS_SIZE(SVE_VQ_MAX)];
uint8_t za_out[ZA_SIG_REGS_SIZE(SVE_VQ_MAX)];
static void setup_za(struct syscall_cfg *cfg, int sve_vl, int sme_vl,
uint64_t svcr)