[PATCH] kselftest/arm64: add RCpc load-acquire to the tested hwcaps
Zeng Heng
zengheng4 at huawei.com
Thu Aug 3 00:02:31 PDT 2023
Add RCpc load-acquire and various features check in the set of hwcaps.
Test log as shown below:
~~~
# RCpc load-acquire present
ok 47 cpuinfo_match_RCpc load-acquire
ok 48 sigill_RCpc load-acquire
# RCpc load-acquire2 present
ok 49 cpuinfo_match_RCpc load-acquire2
ok 50 sigill_RCpc load-acquire2
~~~
Signed-off-by: Zeng Heng <zengheng4 at huawei.com>
---
tools/testing/selftests/arm64/abi/hwcap.c | 26 +++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/tools/testing/selftests/arm64/abi/hwcap.c b/tools/testing/selftests/arm64/abi/hwcap.c
index 93333a90bf3a..ccb3f6adb68f 100644
--- a/tools/testing/selftests/arm64/abi/hwcap.c
+++ b/tools/testing/selftests/arm64/abi/hwcap.c
@@ -194,6 +194,18 @@ static void svebf16_sigill(void)
asm volatile(".inst 0x658aa000" : : : "z0");
}
+static void lrcpc_sigill(void)
+{
+ /* LDAPR W0, [SP, #0] */
+ asm volatile(".inst 0xb8bfc3e0" : : : );
+}
+
+static void ilrcpc_sigill(void)
+{
+ /* LDAPUR W0, [SP, #8] */
+ asm volatile(".inst 0x994083e0" : : : );
+}
+
static const struct hwcap_data {
const char *name;
unsigned long at_hwcap;
@@ -364,6 +376,20 @@ static const struct hwcap_data {
.hwcap_bit = HWCAP2_SVE_EBF16,
.cpuinfo = "sveebf16",
},
+ {
+ .name = "RCpc load-acquire",
+ .at_hwcap = AT_HWCAP,
+ .hwcap_bit = HWCAP_LRCPC,
+ .cpuinfo = "lrcpc",
+ .sigill_fn = lrcpc_sigill,
+ },
+ {
+ .name = "RCpc load-acquire2",
+ .at_hwcap = AT_HWCAP,
+ .hwcap_bit = HWCAP_ILRCPC,
+ .cpuinfo = "ilrcpc",
+ .sigill_fn = ilrcpc_sigill,
+ },
};
static bool seen_sigill;
--
2.25.1
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