| Message ID | 20221218092942.1940-2-yuzenghui@huawei.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | daac835347a52d9d141be281e4657cc08a360e97 |
| Headers | show |
| Series | [1/2] kselftest/arm64: Remove the local NUM_VL definition | expand |
On Sun, Dec 18, 2022 at 05:29:42PM +0800, Zenghui Yu wrote: > 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. Reviewed-by: Mark Brown <broonie@kernel.org>
diff --git a/tools/testing/selftests/arm64/abi/syscall-abi.c b/tools/testing/selftests/arm64/abi/syscall-abi.c index 24a498029c78..4adeb21f500e 100644 --- a/tools/testing/selftests/arm64/abi/syscall-abi.c +++ b/tools/testing/selftests/arm64/abi/syscall-abi.c @@ -282,8 +282,8 @@ 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)
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> --- tools/testing/selftests/arm64/abi/syscall-abi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)