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kselftest/arm64: Validate SVCR in streaming SVE stress test

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In the ZA and ZT test programs we explicitly validate that PSTATE.ZA is as
expected on each loop but we do not do the equivalent for our streaming
SVE test, add a check that we are still in streaming mode on every loop
in case that goes wrong.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230922-arm64-ssve-validate-svcr-v1-1-f518960eaeda@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Mark Brown 2023-09-22 14:42:55 +01:00 committed by Catalin Marinas
parent 6465e260f4
commit 11a7a42ea7
1 changed files with 19 additions and 0 deletions
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19
tools/testing/selftests/arm64/fp/sve-test.S
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@ -473,6 +473,13 @@ function _start
// mov x8, #__NR_sched_yield // Encourage preemption
// svc #0
#ifdef SSVE
mrs x0, S3_3_C4_C2_2 // SVCR should have ZA=0,SM=1
and x1, x0, #3
cmp x1, #1
b.ne svcr_barf
#endif
mov x21, #0
0: mov x0, x21
bl check_zreg
@ -553,3 +560,15 @@ function vl_barf
mov x1, #1
svc #0
endfunction
function svcr_barf
mov x10, x0
puts "Bad SVCR: "
mov x0, x10
bl putdecn
mov x8, #__NR_exit
mov x1, #1
svc #0
endfunction