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From: Mark Brown <broonie@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>, Shuah Khan <shuah@kernel.org>,
	Shuah Khan <skhan@linuxfoundation.org>
Cc: linux-arm-kernel@lists.infradead.org,
	linux-kselftest@vger.kernel.org, Mark Brown <broonie@kernel.org>
Subject: [PATCH v1 8/8] selftests: arm64: Move FPSIMD in SVE ptrace test into a function
Date: Mon, 13 Sep 2021 13:55:05 +0100	[thread overview]
Message-ID: <20210913125505.52619-9-broonie@kernel.org> (raw)
In-Reply-To: <20210913125505.52619-1-broonie@kernel.org>

Now that all the other tests are in functions rather than inline in the
main parent process function also move the test for accessing the FPSIMD
registers via the SVE regset out into their own function.

Signed-off-by: Mark Brown <broonie@kernel.org>
---
 tools/testing/selftests/arm64/fp/sve-ptrace.c | 120 +++++++++---------
 1 file changed, 59 insertions(+), 61 deletions(-)

diff --git a/tools/testing/selftests/arm64/fp/sve-ptrace.c b/tools/testing/selftests/arm64/fp/sve-ptrace.c
index 199710ba65c7..ac0629f05365 100644
--- a/tools/testing/selftests/arm64/fp/sve-ptrace.c
+++ b/tools/testing/selftests/arm64/fp/sve-ptrace.c
@@ -158,6 +158,63 @@ static void check_u32(unsigned int vl, const char *reg,
 	}
 }
 
+/* Access the FPSIMD registers via the SVE regset */
+static void ptrace_sve_fpsimd(pid_t child)
+{
+	void *svebuf = NULL;
+	size_t svebufsz = 0;
+	struct user_sve_header *sve;
+	struct user_fpsimd_state *fpsimd, new_fpsimd;
+	unsigned int i, j;
+	unsigned char *p;
+
+	/* New process should start with FPSIMD registers only */
+	sve = get_sve(child, &svebuf, &svebufsz);
+	if (!sve) {
+		ksft_test_result_fail("get_sve: %s\n", strerror(errno));
+
+		return;
+	} else {
+		ksft_test_result_pass("get_sve(FPSIMD)\n");
+	}
+
+	ksft_test_result((sve->flags & SVE_PT_REGS_MASK) == SVE_PT_REGS_FPSIMD,
+			 "Set FPSIMD registers\n");
+	if ((sve->flags & SVE_PT_REGS_MASK) != SVE_PT_REGS_FPSIMD)
+		goto out;
+
+	/* Try to set a known FPSIMD state via PT_REGS_SVE */
+	fpsimd = (struct user_fpsimd_state *)((char *)sve +
+					      SVE_PT_FPSIMD_OFFSET);
+	for (i = 0; i < 32; ++i) {
+		p = (unsigned char *)&fpsimd->vregs[i];
+
+		for (j = 0; j < sizeof(fpsimd->vregs[i]); ++j)
+			p[j] = j;
+	}
+
+	if (set_sve(child, sve)) {
+		ksft_test_result_fail("set_sve(FPSIMD): %s\n",
+				      strerror(errno));
+
+		goto out;
+	}
+
+	/* Verify via the FPSIMD regset */
+	if (get_fpsimd(child, &new_fpsimd)) {
+		ksft_test_result_fail("get_fpsimd(): %s\n",
+				      strerror(errno));
+		goto out;
+	}
+	if (memcmp(fpsimd, &new_fpsimd, sizeof(*fpsimd)) == 0)
+		ksft_test_result_pass("get_fpsimd() gave same state\n");
+	else
+		ksft_test_result_fail("get_fpsimd() gave different state\n");
+
+out:
+	free(svebuf);
+}
+
 /* Validate attempting to set SVE data and read SVE data */
 static void ptrace_set_sve_get_sve_data(pid_t child, unsigned int vl)
 {
@@ -335,12 +392,6 @@ static int do_parent(pid_t child)
 	pid_t pid;
 	int status;
 	siginfo_t si;
-	void *svebuf = NULL;
-	size_t svebufsz = 0;
-	struct user_sve_header *sve;
-	struct user_fpsimd_state *fpsimd, new_fpsimd;
-	unsigned int i, j;
-	unsigned char *p;
 	unsigned int vq, vl;
 	bool vl_supported;
 
@@ -398,61 +449,8 @@ static int do_parent(pid_t child)
 		}
 	}
 
-	/* New process should start with FPSIMD registers only */
-	sve = get_sve(pid, &svebuf, &svebufsz);
-	if (!sve) {
-		int e = errno;
-
-		ksft_test_result_fail("get_sve: %s\n", strerror(errno));
-		if (e == ESRCH)
-			goto disappeared;
-
-		goto error;
-	} else {
-		ksft_test_result_pass("get_sve(FPSIMD)\n");
-	}
-
-	ksft_test_result((sve->flags & SVE_PT_REGS_MASK) == SVE_PT_REGS_FPSIMD,
-			 "Set FPSIMD registers\n");
-	if ((sve->flags & SVE_PT_REGS_MASK) != SVE_PT_REGS_FPSIMD)
-		goto error;
-
-	/* Try to set a known FPSIMD state via PT_REGS_SVE */
-	fpsimd = (struct user_fpsimd_state *)((char *)sve +
-					      SVE_PT_FPSIMD_OFFSET);
-	for (i = 0; i < 32; ++i) {
-		p = (unsigned char *)&fpsimd->vregs[i];
-
-		for (j = 0; j < sizeof fpsimd->vregs[i]; ++j)
-			p[j] = j;
-	}
-
-	if (set_sve(pid, sve)) {
-		int e = errno;
-
-		ksft_test_result_fail("set_sve(FPSIMD): %s\n",
-				      strerror(errno));
-		if (e == ESRCH)
-			goto disappeared;
-
-		goto error;
-	}
-
-	/* Verify via the FPSIMD regset */
-	if (get_fpsimd(pid, &new_fpsimd)) {
-		int e = errno;
-
-		ksft_test_result_fail("get_fpsimd(): %s\n",
-				      strerror(errno));
-		if (e == ESRCH)
-			goto disappeared;
-
-		goto error;
-	}
-	if (memcmp(fpsimd, &new_fpsimd, sizeof(*fpsimd)) == 0)
-		ksft_test_result_pass("get_fpsimd() gave same state\n");
-	else
-		ksft_test_result_fail("get_fpsimd() gave different state\n");
+	/* FPSIMD via SVE regset */
+	ptrace_sve_fpsimd(child);
 
 	/* Step through every possible VQ */
 	for (vq = SVE_VQ_MIN; vq <= SVE_VQ_MAX; vq++) {
-- 
2.20.1


WARNING: multiple messages have this Message-ID (diff)
From: Mark Brown <broonie@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>, Shuah Khan <shuah@kernel.org>,
	Shuah Khan <skhan@linuxfoundation.org>
Cc: linux-arm-kernel@lists.infradead.org,
	linux-kselftest@vger.kernel.org, Mark Brown <broonie@kernel.org>
Subject: [PATCH v1 8/8] selftests: arm64: Move FPSIMD in SVE ptrace test into a function
Date: Mon, 13 Sep 2021 13:55:05 +0100	[thread overview]
Message-ID: <20210913125505.52619-9-broonie@kernel.org> (raw)
In-Reply-To: <20210913125505.52619-1-broonie@kernel.org>

Now that all the other tests are in functions rather than inline in the
main parent process function also move the test for accessing the FPSIMD
registers via the SVE regset out into their own function.

Signed-off-by: Mark Brown <broonie@kernel.org>
---
 tools/testing/selftests/arm64/fp/sve-ptrace.c | 120 +++++++++---------
 1 file changed, 59 insertions(+), 61 deletions(-)

diff --git a/tools/testing/selftests/arm64/fp/sve-ptrace.c b/tools/testing/selftests/arm64/fp/sve-ptrace.c
index 199710ba65c7..ac0629f05365 100644
--- a/tools/testing/selftests/arm64/fp/sve-ptrace.c
+++ b/tools/testing/selftests/arm64/fp/sve-ptrace.c
@@ -158,6 +158,63 @@ static void check_u32(unsigned int vl, const char *reg,
 	}
 }
 
+/* Access the FPSIMD registers via the SVE regset */
+static void ptrace_sve_fpsimd(pid_t child)
+{
+	void *svebuf = NULL;
+	size_t svebufsz = 0;
+	struct user_sve_header *sve;
+	struct user_fpsimd_state *fpsimd, new_fpsimd;
+	unsigned int i, j;
+	unsigned char *p;
+
+	/* New process should start with FPSIMD registers only */
+	sve = get_sve(child, &svebuf, &svebufsz);
+	if (!sve) {
+		ksft_test_result_fail("get_sve: %s\n", strerror(errno));
+
+		return;
+	} else {
+		ksft_test_result_pass("get_sve(FPSIMD)\n");
+	}
+
+	ksft_test_result((sve->flags & SVE_PT_REGS_MASK) == SVE_PT_REGS_FPSIMD,
+			 "Set FPSIMD registers\n");
+	if ((sve->flags & SVE_PT_REGS_MASK) != SVE_PT_REGS_FPSIMD)
+		goto out;
+
+	/* Try to set a known FPSIMD state via PT_REGS_SVE */
+	fpsimd = (struct user_fpsimd_state *)((char *)sve +
+					      SVE_PT_FPSIMD_OFFSET);
+	for (i = 0; i < 32; ++i) {
+		p = (unsigned char *)&fpsimd->vregs[i];
+
+		for (j = 0; j < sizeof(fpsimd->vregs[i]); ++j)
+			p[j] = j;
+	}
+
+	if (set_sve(child, sve)) {
+		ksft_test_result_fail("set_sve(FPSIMD): %s\n",
+				      strerror(errno));
+
+		goto out;
+	}
+
+	/* Verify via the FPSIMD regset */
+	if (get_fpsimd(child, &new_fpsimd)) {
+		ksft_test_result_fail("get_fpsimd(): %s\n",
+				      strerror(errno));
+		goto out;
+	}
+	if (memcmp(fpsimd, &new_fpsimd, sizeof(*fpsimd)) == 0)
+		ksft_test_result_pass("get_fpsimd() gave same state\n");
+	else
+		ksft_test_result_fail("get_fpsimd() gave different state\n");
+
+out:
+	free(svebuf);
+}
+
 /* Validate attempting to set SVE data and read SVE data */
 static void ptrace_set_sve_get_sve_data(pid_t child, unsigned int vl)
 {
@@ -335,12 +392,6 @@ static int do_parent(pid_t child)
 	pid_t pid;
 	int status;
 	siginfo_t si;
-	void *svebuf = NULL;
-	size_t svebufsz = 0;
-	struct user_sve_header *sve;
-	struct user_fpsimd_state *fpsimd, new_fpsimd;
-	unsigned int i, j;
-	unsigned char *p;
 	unsigned int vq, vl;
 	bool vl_supported;
 
@@ -398,61 +449,8 @@ static int do_parent(pid_t child)
 		}
 	}
 
-	/* New process should start with FPSIMD registers only */
-	sve = get_sve(pid, &svebuf, &svebufsz);
-	if (!sve) {
-		int e = errno;
-
-		ksft_test_result_fail("get_sve: %s\n", strerror(errno));
-		if (e == ESRCH)
-			goto disappeared;
-
-		goto error;
-	} else {
-		ksft_test_result_pass("get_sve(FPSIMD)\n");
-	}
-
-	ksft_test_result((sve->flags & SVE_PT_REGS_MASK) == SVE_PT_REGS_FPSIMD,
-			 "Set FPSIMD registers\n");
-	if ((sve->flags & SVE_PT_REGS_MASK) != SVE_PT_REGS_FPSIMD)
-		goto error;
-
-	/* Try to set a known FPSIMD state via PT_REGS_SVE */
-	fpsimd = (struct user_fpsimd_state *)((char *)sve +
-					      SVE_PT_FPSIMD_OFFSET);
-	for (i = 0; i < 32; ++i) {
-		p = (unsigned char *)&fpsimd->vregs[i];
-
-		for (j = 0; j < sizeof fpsimd->vregs[i]; ++j)
-			p[j] = j;
-	}
-
-	if (set_sve(pid, sve)) {
-		int e = errno;
-
-		ksft_test_result_fail("set_sve(FPSIMD): %s\n",
-				      strerror(errno));
-		if (e == ESRCH)
-			goto disappeared;
-
-		goto error;
-	}
-
-	/* Verify via the FPSIMD regset */
-	if (get_fpsimd(pid, &new_fpsimd)) {
-		int e = errno;
-
-		ksft_test_result_fail("get_fpsimd(): %s\n",
-				      strerror(errno));
-		if (e == ESRCH)
-			goto disappeared;
-
-		goto error;
-	}
-	if (memcmp(fpsimd, &new_fpsimd, sizeof(*fpsimd)) == 0)
-		ksft_test_result_pass("get_fpsimd() gave same state\n");
-	else
-		ksft_test_result_fail("get_fpsimd() gave different state\n");
+	/* FPSIMD via SVE regset */
+	ptrace_sve_fpsimd(child);
 
 	/* Step through every possible VQ */
 	for (vq = SVE_VQ_MIN; vq <= SVE_VQ_MAX; vq++) {
-- 
2.20.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2021-09-13 13:21 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-13 12:54 [PATCH v1 0/8] selftests: arm64: SVE ptrace test rework Mark Brown
2021-09-13 12:54 ` Mark Brown
2021-09-13 12:54 ` [PATCH v1 1/8] selftests: arm64: Use a define for the number of SVE ptrace tests to be run Mark Brown
2021-09-13 12:54   ` Mark Brown
2021-09-13 12:54 ` [PATCH v1 2/8] selftests: arm64: Don't log child creation as a test in SVE ptrace test Mark Brown
2021-09-13 12:54   ` Mark Brown
2021-09-13 12:55 ` [PATCH v1 3/8] selftests: arm64: Remove extraneous register setting code Mark Brown
2021-09-13 12:55   ` Mark Brown
2021-09-13 12:55 ` [PATCH v1 4/8] selftests: arm64: Document what the SVE ptrace test is doing Mark Brown
2021-09-13 12:55   ` Mark Brown
2021-09-13 12:55 ` [PATCH v1 5/8] selftests: arm64: Clarify output when verifying SVE register set Mark Brown
2021-09-13 12:55   ` Mark Brown
2021-09-13 12:55 ` [PATCH v1 6/8] selftests: arm64: Verify interoperation of SVE and FPSIMD register sets Mark Brown
2021-09-13 12:55   ` Mark Brown
2021-09-13 12:55 ` [PATCH v1 7/8] selftests: arm64: More comprehensively test the SVE ptrace interface Mark Brown
2021-09-13 12:55   ` Mark Brown
2021-09-13 12:55 ` Mark Brown [this message]
2021-09-13 12:55   ` [PATCH v1 8/8] selftests: arm64: Move FPSIMD in SVE ptrace test into a function Mark Brown
2021-09-29 17:48 ` [PATCH v1 0/8] selftests: arm64: SVE ptrace test rework Will Deacon
2021-09-29 17:48   ` Will Deacon

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