[PATCH v1 2/2] kselftest/arm64: add FEAT_LSE128 to hwcap test
Joey Gouly
joey.gouly at arm.com
Tue Oct 3 05:45:44 PDT 2023
Add test of a 128-bit atomic instruction for FEAT_LSE128.
Signed-off-by: Joey Gouly <joey.gouly at arm.com>
Cc: Catalin Marinas <catalin.marinas at arm.com>
Cc: Will Deacon <will at kernel.org>
---
tools/testing/selftests/arm64/abi/hwcap.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/tools/testing/selftests/arm64/abi/hwcap.c b/tools/testing/selftests/arm64/abi/hwcap.c
index e3d262831d91..dd9a1cdfd294 100644
--- a/tools/testing/selftests/arm64/abi/hwcap.c
+++ b/tools/testing/selftests/arm64/abi/hwcap.c
@@ -46,6 +46,20 @@ static void atomics_sigill(void)
asm volatile(".inst 0xb82003ff" : : : );
}
+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 crc32_sigill(void)
{
/* CRC32W W0, W0, W1 */
@@ -364,6 +378,13 @@ static const struct hwcap_data {
.sigbus_fn = uscat_sigbus,
.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,
--
2.25.1
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