diff mbox series

[v3,22/25] kselftest/arm64: add HWCAP test for FEAT_S1POE

Message ID 20231124163510.1835740-23-joey.gouly@arm.com (mailing list archive)
State New
Headers show
Series Permission Overlay Extension | expand

Commit Message

Joey Gouly Nov. 24, 2023, 4:35 p.m. UTC 
Check that when POE is enabled, the POR_EL0 register is accessible.

Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
---
 tools/testing/selftests/arm64/abi/hwcap.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

Comments

Mark Brown Nov. 24, 2023, 5:02 p.m. UTC | #1 
On Fri, Nov 24, 2023 at 04:35:07PM +0000, Joey Gouly wrote:
> Check that when POE is enabled, the POR_EL0 register is accessible.

Reviewed-by: Mark Brown <broonie@kernel.org>
diff mbox series

Patch

diff --git a/tools/testing/selftests/arm64/abi/hwcap.c b/tools/testing/selftests/arm64/abi/hwcap.c
index 1189e77c8152..9ee7b04f3fbb 100644
--- a/tools/testing/selftests/arm64/abi/hwcap.c
+++ b/tools/testing/selftests/arm64/abi/hwcap.c
@@ -115,6 +115,12 @@  static void pmull_sigill(void)
 	asm volatile(".inst 0x0ee0e000" : : : );
 }
 
+static void poe_sigill(void)
+{
+	/* mrs x0, POR_EL0 */
+	asm volatile("mrs x0, S3_3_C10_C2_4" : : : "x0");
+}
+
 static void rng_sigill(void)
 {
 	asm volatile("mrs x0, S3_3_C2_C4_0" : : : "x0");
@@ -426,6 +432,14 @@  static const struct hwcap_data {
 		.cpuinfo = "pmull",
 		.sigill_fn = pmull_sigill,
 	},
+	{
+		.name = "POE",
+		.at_hwcap = AT_HWCAP2,
+		.hwcap_bit = HWCAP2_POE,
+		.cpuinfo = "poe",
+		.sigill_fn = poe_sigill,
+		.sigill_reliable = true,
+	},
 	{
 		.name = "RNG",
 		.at_hwcap = AT_HWCAP2,