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| author | Joey Gouly <joey.gouly@arm.com> | 2023-10-03 13:45:44 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2023-10-13 19:12:46 +0100 |
| commit | 72e301956dbb31bd679eff66fbe3da32d2dc2af5 (patch) | |
| tree | 591749416383de6eec61f0d723abf10794ce9201 /tools/testing/selftests/arm64/abi/hwcap.c | |
| parent | 94d0657f9f0d311489606589133ebf49e28104d8 (diff) | |
| download | lwn-72e301956dbb31bd679eff66fbe3da32d2dc2af5.tar.gz lwn-72e301956dbb31bd679eff66fbe3da32d2dc2af5.zip | |
kselftest/arm64: add FEAT_LSE128 to hwcap test
Add test of a 128-bit atomic instruction for FEAT_LSE128.
Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20231003124544.858804-3-joey.gouly@arm.com
[catalin.marinas@arm.com: reordered lse128_sigill() alphabetically]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'tools/testing/selftests/arm64/abi/hwcap.c')
| -rw-r--r-- | tools/testing/selftests/arm64/abi/hwcap.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/tools/testing/selftests/arm64/abi/hwcap.c b/tools/testing/selftests/arm64/abi/hwcap.c index a60f23794944..1189e77c8152 100644 --- a/tools/testing/selftests/arm64/abi/hwcap.c +++ b/tools/testing/selftests/arm64/abi/hwcap.c @@ -81,6 +81,20 @@ static void lrcpc_sigill(void) asm volatile(".inst 0xb8bfc3e0" : : : ); } +static void lse128_sigill(void) +{ + u64 __attribute__ ((aligned (16))) mem[2] = { 10, 20 }; + register u64 *memp asm ("x0") = mem; + register u64 val0 asm ("x1") = 5; + register u64 val1 asm ("x2") = 4; + + /* SWPP X1, X2, [X0] */ + asm volatile(".inst 0x19228001" + : "+r" (memp), "+r" (val0), "+r" (val1) + : + : "cc", "memory"); +} + static void mops_sigill(void) { char dst[1], src[1]; @@ -391,6 +405,13 @@ static const struct hwcap_data { .sigbus_reliable = true, }, { + .name = "LSE128", + .at_hwcap = AT_HWCAP2, + .hwcap_bit = HWCAP2_LSE128, + .cpuinfo = "lse128", + .sigill_fn = lse128_sigill, + }, + { .name = "MOPS", .at_hwcap = AT_HWCAP2, .hwcap_bit = HWCAP2_MOPS, |