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kselftest/arm64: add FEAT_LSE128 to hwcap test

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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>
This commit is contained in:
Joey Gouly
2023-10-03 13:45:44 +01:00
committed by Catalin Marinas
parent 94d0657f9f
commit 72e301956d
1 changed files with 21 additions and 0 deletions
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21
tools/testing/selftests/arm64/abi/hwcap.c
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@@ -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];
@@ -390,6 +404,13 @@ 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,