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Message-Id: <20240503-dev-charlie-support_thead_vector_6_9-v6-17-cb7624e65d82@rivosinc.com>
Date: Fri, 03 May 2024 11:18:32 -0700
From: Charlie Jenkins <charlie@...osinc.com>
To: Conor Dooley <conor@...nel.org>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Paul Walmsley <paul.walmsley@...ive.com>,
Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>,
Guo Ren <guoren@...nel.org>, Conor Dooley <conor+dt@...nel.org>,
Chen-Yu Tsai <wens@...e.org>, Jernej Skrabec <jernej.skrabec@...il.com>,
Samuel Holland <samuel@...lland.org>,
Conor Dooley <conor.dooley@...rochip.com>, Evan Green <evan@...osinc.com>,
Clément Léger <cleger@...osinc.com>,
Jonathan Corbet <corbet@....net>, Shuah Khan <shuah@...nel.org>
Cc: linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, Palmer Dabbelt <palmer@...osinc.com>,
linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
linux-doc@...r.kernel.org, linux-kselftest@...r.kernel.org,
Charlie Jenkins <charlie@...osinc.com>
Subject: [PATCH v6 17/17] selftests: riscv: Support xtheadvector in vector
tests
Extend existing vector tests to be compatible with the xtheadvector
instruction set.
Signed-off-by: Charlie Jenkins <charlie@...osinc.com>
---
.../selftests/riscv/vector/v_exec_initval_nolibc.c | 23 ++++--
tools/testing/selftests/riscv/vector/v_helpers.c | 17 +++-
tools/testing/selftests/riscv/vector/v_helpers.h | 4 +-
tools/testing/selftests/riscv/vector/v_initval.c | 12 ++-
.../selftests/riscv/vector/vstate_exec_nolibc.c | 20 +++--
.../testing/selftests/riscv/vector/vstate_prctl.c | 91 ++++++++++++++--------
6 files changed, 115 insertions(+), 52 deletions(-)
diff --git a/tools/testing/selftests/riscv/vector/v_exec_initval_nolibc.c b/tools/testing/selftests/riscv/vector/v_exec_initval_nolibc.c
index 74b13806baf0..58c29ea91b80 100644
--- a/tools/testing/selftests/riscv/vector/v_exec_initval_nolibc.c
+++ b/tools/testing/selftests/riscv/vector/v_exec_initval_nolibc.c
@@ -18,13 +18,22 @@ int main(int argc, char **argv)
unsigned long vl;
int first = 1;
- asm volatile (
- ".option push\n\t"
- ".option arch, +v\n\t"
- "vsetvli %[vl], x0, e8, m1, ta, ma\n\t"
- ".option pop\n\t"
- : [vl] "=r" (vl)
- );
+ if (argc > 2 && strcmp(argv[2], "x"))
+ asm volatile (
+ // 0 | zimm[10:0] | rs1 | 1 1 1 | rd |1010111| vsetvli
+ // vsetvli t4, x0, e8, m1, d1
+ ".insn 0b00000000000000000111111011010111\n\t"
+ "mv %[vl], t4\n\t"
+ : [vl] "=r" (vl) : : "t4"
+ );
+ else
+ asm volatile (
+ ".option push\n\t"
+ ".option arch, +v\n\t"
+ "vsetvli %[vl], x0, e8, m1, ta, ma\n\t"
+ ".option pop\n\t"
+ : [vl] "=r" (vl)
+ );
#define CHECK_VECTOR_REGISTER(register) ({ \
for (int i = 0; i < vl; i++) { \
diff --git a/tools/testing/selftests/riscv/vector/v_helpers.c b/tools/testing/selftests/riscv/vector/v_helpers.c
index 15c22318db72..2c4df76eefe9 100644
--- a/tools/testing/selftests/riscv/vector/v_helpers.c
+++ b/tools/testing/selftests/riscv/vector/v_helpers.c
@@ -1,11 +1,21 @@
// SPDX-License-Identifier: GPL-2.0-only
#include "../hwprobe/hwprobe.h"
+#include <asm/vendor/thead.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/wait.h>
+int is_xtheadvector_supported(void)
+{
+ struct riscv_hwprobe pair;
+
+ pair.key = RISCV_HWPROBE_KEY_VENDOR_EXT_THEAD_0;
+ riscv_hwprobe(&pair, 1, 0, NULL, 0);
+ return pair.value & RISCV_HWPROBE_VENDOR_EXT_XTHEADVECTOR;
+}
+
int is_vector_supported(void)
{
struct riscv_hwprobe pair;
@@ -15,9 +25,9 @@ int is_vector_supported(void)
return pair.value & RISCV_HWPROBE_IMA_V;
}
-int launch_test(char *next_program, int test_inherit)
+int launch_test(char *next_program, int test_inherit, int xtheadvector)
{
- char *exec_argv[3], *exec_envp[1];
+ char *exec_argv[4], *exec_envp[1];
int rc, pid, status;
pid = fork();
@@ -29,7 +39,8 @@ int launch_test(char *next_program, int test_inherit)
if (!pid) {
exec_argv[0] = next_program;
exec_argv[1] = test_inherit != 0 ? "x" : NULL;
- exec_argv[2] = NULL;
+ exec_argv[2] = xtheadvector != 0 ? "x" : NULL;
+ exec_argv[3] = NULL;
exec_envp[0] = NULL;
/* launch the program again to check inherit */
rc = execve(next_program, exec_argv, exec_envp);
diff --git a/tools/testing/selftests/riscv/vector/v_helpers.h b/tools/testing/selftests/riscv/vector/v_helpers.h
index 88719c4be496..67d41cb6f871 100644
--- a/tools/testing/selftests/riscv/vector/v_helpers.h
+++ b/tools/testing/selftests/riscv/vector/v_helpers.h
@@ -1,5 +1,7 @@
/* SPDX-License-Identifier: GPL-2.0-only */
+int is_xtheadvector_supported(void);
+
int is_vector_supported(void);
-int launch_test(char *next_program, int test_inherit);
+int launch_test(char *next_program, int test_inherit, int xtheadvector);
diff --git a/tools/testing/selftests/riscv/vector/v_initval.c b/tools/testing/selftests/riscv/vector/v_initval.c
index f38b5797fa31..be9e1d18ad29 100644
--- a/tools/testing/selftests/riscv/vector/v_initval.c
+++ b/tools/testing/selftests/riscv/vector/v_initval.c
@@ -7,10 +7,16 @@
TEST(v_initval)
{
- if (!is_vector_supported())
- SKIP(return, "Vector not supported");
+ int xtheadvector = 0;
- ASSERT_EQ(0, launch_test(NEXT_PROGRAM, 0));
+ if (!is_vector_supported()) {
+ if (is_xtheadvector_supported())
+ xtheadvector = 1;
+ else
+ SKIP(return, "Vector not supported");
+ }
+
+ ASSERT_EQ(0, launch_test(NEXT_PROGRAM, 0, xtheadvector));
}
TEST_HARNESS_MAIN
diff --git a/tools/testing/selftests/riscv/vector/vstate_exec_nolibc.c b/tools/testing/selftests/riscv/vector/vstate_exec_nolibc.c
index 1f9969bed235..12d30d3b90fa 100644
--- a/tools/testing/selftests/riscv/vector/vstate_exec_nolibc.c
+++ b/tools/testing/selftests/riscv/vector/vstate_exec_nolibc.c
@@ -6,13 +6,16 @@
int main(int argc, char **argv)
{
- int rc, pid, status, test_inherit = 0;
+ int rc, pid, status, test_inherit = 0, xtheadvector = 0;
long ctrl, ctrl_c;
char *exec_argv[2], *exec_envp[2];
- if (argc > 1)
+ if (argc > 1 && strcmp(argv[1], "x"))
test_inherit = 1;
+ if (argc > 2 && strcmp(argv[2], "x"))
+ xtheadvector = 1;
+
ctrl = my_syscall1(__NR_prctl, PR_RISCV_V_GET_CONTROL);
if (ctrl < 0) {
puts("PR_RISCV_V_GET_CONTROL is not supported\n");
@@ -53,11 +56,14 @@ int main(int argc, char **argv)
puts("child's vstate_ctrl not equal to parent's\n");
exit(-1);
}
- asm volatile (".option push\n\t"
- ".option arch, +v\n\t"
- "vsetvli x0, x0, e32, m8, ta, ma\n\t"
- ".option pop\n\t"
- );
+ if (xtheadvector)
+ asm volatile (".insn 0x00007ed7");
+ else
+ asm volatile (".option push\n\t"
+ ".option arch, +v\n\t"
+ "vsetvli x0, x0, e32, m8, ta, ma\n\t"
+ ".option pop\n\t"
+ );
exit(ctrl);
}
}
diff --git a/tools/testing/selftests/riscv/vector/vstate_prctl.c b/tools/testing/selftests/riscv/vector/vstate_prctl.c
index 528e8c544db0..375af40e88e6 100644
--- a/tools/testing/selftests/riscv/vector/vstate_prctl.c
+++ b/tools/testing/selftests/riscv/vector/vstate_prctl.c
@@ -11,7 +11,7 @@
#define NEXT_PROGRAM "./vstate_exec_nolibc"
-int test_and_compare_child(long provided, long expected, int inherit)
+int test_and_compare_child(long provided, long expected, int inherit, int xtheadvector)
{
int rc;
@@ -21,7 +21,7 @@ int test_and_compare_child(long provided, long expected, int inherit)
provided, rc);
return -1;
}
- rc = launch_test(NEXT_PROGRAM, inherit);
+ rc = launch_test(NEXT_PROGRAM, inherit, xtheadvector);
if (rc != expected) {
printf("Test failed, check %d != %ld\n", rc, expected);
return -2;
@@ -36,7 +36,7 @@ TEST(get_control_no_v)
{
long rc;
- if (is_vector_supported())
+ if (is_vector_supported() || is_xtheadvector_supported())
SKIP(return, "Test expects vector to be not supported");
rc = prctl(PR_RISCV_V_GET_CONTROL);
@@ -48,7 +48,7 @@ TEST(set_control_no_v)
{
long rc;
- if (is_vector_supported())
+ if (is_vector_supported() || is_xtheadvector_supported())
SKIP(return, "Test expects vector to be not supported");
rc = prctl(PR_RISCV_V_SET_CONTROL, PR_RISCV_V_VSTATE_CTRL_ON);
@@ -61,12 +61,12 @@ TEST(vstate_on_current)
long flag;
long rc;
- if (!is_vector_supported())
+ if (!is_vector_supported() && !is_xtheadvector_supported())
SKIP(return, "Vector not supported");
flag = PR_RISCV_V_VSTATE_CTRL_ON;
rc = prctl(PR_RISCV_V_SET_CONTROL, flag);
- EXPECT_EQ(0, rc) TH_LOG("Enabling V for current should always success");
+ EXPECT_EQ(0, rc) TH_LOG("Enabling V for current should always succeed");
}
TEST(vstate_off_eperm)
@@ -74,99 +74,128 @@ TEST(vstate_off_eperm)
long flag;
long rc;
- if (!is_vector_supported())
+ if (!is_vector_supported() && !is_xtheadvector_supported())
SKIP(return, "Vector not supported");
flag = PR_RISCV_V_VSTATE_CTRL_OFF;
rc = prctl(PR_RISCV_V_SET_CONTROL, flag);
- EXPECT_EQ(EPERM, errno) TH_LOG("Disabling current's V alive must fail with EPERM(%d)", errno);
- EXPECT_EQ(-1, rc) TH_LOG("Disabling current's V alive must fail with EPERM(%d)", errno);
+ EXPECT_EQ(EPERM, errno) TH_LOG("Disabling V in current thread with V enabled must fail with EPERM(%d)", errno);
+ EXPECT_EQ(-1, rc) TH_LOG("Disabling V in current thread with V enabled must fail with EPERM(%d)", errno);
}
TEST(vstate_on_no_nesting)
{
long flag;
+ int xtheadvector = 0;
- if (!is_vector_supported())
- SKIP(return, "Vector not supported");
+ if (!is_vector_supported()) {
+ if (is_xtheadvector_supported())
+ xtheadvector = 1;
+ else
+ SKIP(return, "Vector not supported");
+ }
/* Turn on next's vector explicitly and test */
flag = PR_RISCV_V_VSTATE_CTRL_ON << PR_RISCV_V_VSTATE_CTRL_NEXT_SHIFT;
- EXPECT_EQ(0, test_and_compare_child(flag, PR_RISCV_V_VSTATE_CTRL_ON, 0));
+ EXPECT_EQ(0, test_and_compare_child(flag, PR_RISCV_V_VSTATE_CTRL_ON, 0, xtheadvector));
}
TEST(vstate_off_nesting)
{
long flag;
+ int xtheadvector = 0;
- if (!is_vector_supported())
- SKIP(return, "Vector not supported");
+ if (!is_vector_supported()) {
+ if (is_xtheadvector_supported())
+ xtheadvector = 1;
+ else
+ SKIP(return, "Vector not supported");
+ }
/* Turn off next's vector explicitly and test */
flag = PR_RISCV_V_VSTATE_CTRL_OFF << PR_RISCV_V_VSTATE_CTRL_NEXT_SHIFT;
- EXPECT_EQ(0, test_and_compare_child(flag, PR_RISCV_V_VSTATE_CTRL_OFF, 1));
+ EXPECT_EQ(0, test_and_compare_child(flag, PR_RISCV_V_VSTATE_CTRL_OFF, 1, xtheadvector));
}
TEST(vstate_on_inherit_no_nesting)
{
long flag, expected;
+ int xtheadvector = 0;
- if (!is_vector_supported())
- SKIP(return, "Vector not supported");
+ if (!is_vector_supported()) {
+ if (is_xtheadvector_supported())
+ xtheadvector = 1;
+ else
+ SKIP(return, "Vector not supported");
+ }
/* Turn on next's vector explicitly and test no inherit */
flag = PR_RISCV_V_VSTATE_CTRL_ON << PR_RISCV_V_VSTATE_CTRL_NEXT_SHIFT;
flag |= PR_RISCV_V_VSTATE_CTRL_INHERIT;
expected = flag | PR_RISCV_V_VSTATE_CTRL_ON;
- EXPECT_EQ(0, test_and_compare_child(flag, expected, 0));
+ EXPECT_EQ(0, test_and_compare_child(flag, expected, 0, xtheadvector));
}
TEST(vstate_on_inherit)
{
long flag, expected;
+ int xtheadvector = 0;
- if (!is_vector_supported())
- SKIP(return, "Vector not supported");
+ if (!is_vector_supported()) {
+ if (is_xtheadvector_supported())
+ xtheadvector = 1;
+ else
+ SKIP(return, "Vector not supported");
+ }
/* Turn on next's vector explicitly and test inherit */
flag = PR_RISCV_V_VSTATE_CTRL_ON << PR_RISCV_V_VSTATE_CTRL_NEXT_SHIFT;
flag |= PR_RISCV_V_VSTATE_CTRL_INHERIT;
expected = flag | PR_RISCV_V_VSTATE_CTRL_ON;
- EXPECT_EQ(0, test_and_compare_child(flag, expected, 1));
+ EXPECT_EQ(0, test_and_compare_child(flag, expected, 1, xtheadvector));
}
TEST(vstate_off_inherit_no_nesting)
{
long flag, expected;
+ int xtheadvector = 0;
- if (!is_vector_supported())
- SKIP(return, "Vector not supported");
-
+ if (!is_vector_supported()) {
+ if (is_xtheadvector_supported())
+ xtheadvector = 1;
+ else
+ SKIP(return, "Vector not supported");
+ }
/* Turn off next's vector explicitly and test no inherit */
flag = PR_RISCV_V_VSTATE_CTRL_OFF << PR_RISCV_V_VSTATE_CTRL_NEXT_SHIFT;
flag |= PR_RISCV_V_VSTATE_CTRL_INHERIT;
expected = flag | PR_RISCV_V_VSTATE_CTRL_OFF;
- EXPECT_EQ(0, test_and_compare_child(flag, expected, 0));
+ EXPECT_EQ(0, test_and_compare_child(flag, expected, 0, xtheadvector));
}
TEST(vstate_off_inherit)
{
long flag, expected;
+ int xtheadvector = 0;
- if (!is_vector_supported())
- SKIP(return, "Vector not supported");
+ if (!is_vector_supported()) {
+ if (is_xtheadvector_supported())
+ xtheadvector = 1;
+ else
+ SKIP(return, "Vector not supported");
+ }
/* Turn off next's vector explicitly and test inherit */
flag = PR_RISCV_V_VSTATE_CTRL_OFF << PR_RISCV_V_VSTATE_CTRL_NEXT_SHIFT;
flag |= PR_RISCV_V_VSTATE_CTRL_INHERIT;
expected = flag | PR_RISCV_V_VSTATE_CTRL_OFF;
- EXPECT_EQ(0, test_and_compare_child(flag, expected, 1));
+ EXPECT_EQ(0, test_and_compare_child(flag, expected, 1, xtheadvector));
}
/* arguments should fail with EINVAL */
@@ -174,7 +203,7 @@ TEST(inval_set_control_1)
{
int rc;
- if (!is_vector_supported())
+ if (!is_vector_supported() && !is_xtheadvector_supported())
SKIP(return, "Vector not supported");
rc = prctl(PR_RISCV_V_SET_CONTROL, 0xff0);
@@ -187,7 +216,7 @@ TEST(inval_set_control_2)
{
int rc;
- if (!is_vector_supported())
+ if (!is_vector_supported() && !is_xtheadvector_supported())
SKIP(return, "Vector not supported");
rc = prctl(PR_RISCV_V_SET_CONTROL, 0x3);
@@ -200,7 +229,7 @@ TEST(inval_set_control_3)
{
int rc;
- if (!is_vector_supported())
+ if (!is_vector_supported() && !is_xtheadvector_supported())
SKIP(return, "Vector not supported");
rc = prctl(PR_RISCV_V_SET_CONTROL, 0xc);
--
2.44.0
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