linux-kernel - [PATCH v11 29/39] kselftest/arm64: Add GCS as a detected feature in the signal tests

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Message-Id: <20240822-arm64-gcs-v11-29-41b81947ecb5@kernel.org>
Date: Thu, 22 Aug 2024 02:15:32 +0100
From: Mark Brown <broonie@...nel.org>
To: Catalin Marinas <catalin.marinas@....com>, 
 Will Deacon <will@...nel.org>, Jonathan Corbet <corbet@....net>, 
 Andrew Morton <akpm@...ux-foundation.org>, Marc Zyngier <maz@...nel.org>, 
 Oliver Upton <oliver.upton@...ux.dev>, James Morse <james.morse@....com>, 
 Suzuki K Poulose <suzuki.poulose@....com>, Arnd Bergmann <arnd@...db.de>, 
 Oleg Nesterov <oleg@...hat.com>, Eric Biederman <ebiederm@...ssion.com>, 
 Shuah Khan <shuah@...nel.org>, 
 "Rick P. Edgecombe" <rick.p.edgecombe@...el.com>, 
 Deepak Gupta <debug@...osinc.com>, Ard Biesheuvel <ardb@...nel.org>, 
 Szabolcs Nagy <Szabolcs.Nagy@....com>, Kees Cook <kees@...nel.org>
Cc: "H.J. Lu" <hjl.tools@...il.com>, 
 Paul Walmsley <paul.walmsley@...ive.com>, 
 Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
 Florian Weimer <fweimer@...hat.com>, Christian Brauner <brauner@...nel.org>, 
 Thiago Jung Bauermann <thiago.bauermann@...aro.org>, 
 Ross Burton <ross.burton@....com>, 
 Yury Khrustalev <yury.khrustalev@....com>, 
 Wilco Dijkstra <wilco.dijkstra@....com>, 
 linux-arm-kernel@...ts.infradead.org, linux-doc@...r.kernel.org, 
 kvmarm@...ts.linux.dev, linux-fsdevel@...r.kernel.org, 
 linux-arch@...r.kernel.org, linux-mm@...ck.org, 
 linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-riscv@...ts.infradead.org, Mark Brown <broonie@...nel.org>
Subject: [PATCH v11 29/39] kselftest/arm64: Add GCS as a detected feature
 in the signal tests

In preparation for testing GCS related signal handling add it as a feature
we check for in the signal handling support code.

Reviewed-by: Thiago Jung Bauermann <thiago.bauermann@...aro.org>
Signed-off-by: Mark Brown <broonie@...nel.org>
---
 tools/testing/selftests/arm64/signal/test_signals.h       | 2 ++
 tools/testing/selftests/arm64/signal/test_signals_utils.c | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/tools/testing/selftests/arm64/signal/test_signals.h b/tools/testing/selftests/arm64/signal/test_signals.h
index 1e6273d81575..7ada43688c02 100644
--- a/tools/testing/selftests/arm64/signal/test_signals.h
+++ b/tools/testing/selftests/arm64/signal/test_signals.h
@@ -35,6 +35,7 @@ enum {
 	FSME_BIT,
 	FSME_FA64_BIT,
 	FSME2_BIT,
+	FGCS_BIT,
 	FMAX_END
 };

@@ -43,6 +44,7 @@ enum {
 #define FEAT_SME		(1UL << FSME_BIT)
 #define FEAT_SME_FA64		(1UL << FSME_FA64_BIT)
 #define FEAT_SME2		(1UL << FSME2_BIT)
+#define FEAT_GCS		(1UL << FGCS_BIT)

 /*
  * A descriptor used to describe and configure a test case.
diff --git a/tools/testing/selftests/arm64/signal/test_signals_utils.c b/tools/testing/selftests/arm64/signal/test_signals_utils.c
index 0dc948db3a4a..89ef95c1af0e 100644
--- a/tools/testing/selftests/arm64/signal/test_signals_utils.c
+++ b/tools/testing/selftests/arm64/signal/test_signals_utils.c
@@ -30,6 +30,7 @@ static char const *const feats_names[FMAX_END] = {
 	" SME ",
 	" FA64 ",
 	" SME2 ",
+	" GCS ",
 };

 #define MAX_FEATS_SZ	128
@@ -329,6 +330,8 @@ int test_init(struct tdescr *td)
 			td->feats_supported |= FEAT_SME_FA64;
 		if (getauxval(AT_HWCAP2) & HWCAP2_SME2)
 			td->feats_supported |= FEAT_SME2;
+		if (getauxval(AT_HWCAP2) & HWCAP2_GCS)
+			td->feats_supported |= FEAT_GCS;
 		if (feats_ok(td)) {
 			if (td->feats_required & td->feats_supported)
 				fprintf(stderr,

-- 
2.39.2