diff options
| author | Kristina Martsenko <kristina.martsenko@arm.com> | 2023-05-09 17:22:35 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2023-06-05 19:05:42 +0300 |
| commit | d8a324f102cc894fa0df6849504a9023f3ea5da6 (patch) | |
| tree | 3db6b85f39dd22c050ce63a0957973dade6f2b11 /tools | |
| parent | 3e1dedb29d0f70b0bd10bb83001df8c04fc246eb (diff) | |
| download | linux-d8a324f102cc894fa0df6849504a9023f3ea5da6.tar.xz | |
kselftest/arm64: add MOPS to hwcap test
Add the MOPS hwcap to the hwcap kselftest and check that a SIGILL is not
generated when the feature is detected. A SIGILL is reliable when the
feature is not detected as SCTLR_EL1.MSCEn won't have been set.
Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230509142235.3284028-12-kristina.martsenko@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/arm64/abi/hwcap.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/tools/testing/selftests/arm64/abi/hwcap.c b/tools/testing/selftests/arm64/abi/hwcap.c index 93333a90bf3a..d4ad813fed10 100644 --- a/tools/testing/selftests/arm64/abi/hwcap.c +++ b/tools/testing/selftests/arm64/abi/hwcap.c @@ -39,6 +39,20 @@ static void cssc_sigill(void) asm volatile(".inst 0xdac01c00" : : : "x0"); } +static void mops_sigill(void) +{ + char dst[1], src[1]; + register char *dstp asm ("x0") = dst; + register char *srcp asm ("x1") = src; + register long size asm ("x2") = 1; + + /* CPYP [x0]!, [x1]!, x2! */ + asm volatile(".inst 0x1d010440" + : "+r" (dstp), "+r" (srcp), "+r" (size) + : + : "cc", "memory"); +} + static void rng_sigill(void) { asm volatile("mrs x0, S3_3_C2_C4_0" : : : "x0"); @@ -210,6 +224,14 @@ static const struct hwcap_data { .sigill_fn = cssc_sigill, }, { + .name = "MOPS", + .at_hwcap = AT_HWCAP2, + .hwcap_bit = HWCAP2_MOPS, + .cpuinfo = "mops", + .sigill_fn = mops_sigill, + .sigill_reliable = true, + }, + { .name = "RNG", .at_hwcap = AT_HWCAP2, .hwcap_bit = HWCAP2_RNG, |