Commit a7db82f1 authored by Mark Brown's avatar Mark Brown Committed by Catalin Marinas

kselftest/arm64: Fix enumeration of systems without 128 bit SME for SSVE+ZA

The current signal handling tests for SME do not account for the fact that
unlike SVE all SME vector lengths are optional so we can't guarantee that
we will encounter the minimum possible VL, they will hang enumerating VLs
on such systems. Abort enumeration when we find the lowest VL in the newly
added ssve_za_regs test.

Fixes: bc69da5f ("kselftest/arm64: Verify simultaneous SSVE and ZA context generation")
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230131-arm64-kselftest-sig-sme-no-128-v1-2-d47c13dc8e1e@kernel.orgSigned-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 5f389238
......@@ -34,6 +34,10 @@ static bool sme_get_vls(struct tdescr *td)
vl &= PR_SME_VL_LEN_MASK;
/* Did we find the lowest supported VL? */
if (vq < sve_vq_from_vl(vl))
break;
/* Skip missing VLs */
vq = sve_vq_from_vl(vl);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment