* [PATCH RESEND bpf-next v4 0/3] Add 12-argument support for RV64 bpf trampoline
@ 2024-06-22 2:21 Pu Lehui
2024-06-22 2:21 ` [PATCH RESEND bpf-next v4 1/3] riscv, bpf: " Pu Lehui
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: Pu Lehui @ 2024-06-22 2:21 UTC (permalink / raw)
To: bpf, linux-riscv, netdev
Cc: Björn Töpel, Alexei Starovoitov, Daniel Borkmann,
Andrii Nakryiko, Martin KaFai Lau, Eduard Zingerman, Song Liu,
Yonghong Song, John Fastabend, KP Singh, Stanislav Fomichev,
Hao Luo, Jiri Olsa, Puranjay Mohan, Palmer Dabbelt, Pu Lehui
From: Pu Lehui <pulehui@huawei.com>
This patch adds 12 function arguments support for riscv64 bpf
trampoline. The current bpf trampoline supports <= sizeof(u64) bytes
scalar arguments [0] and <= 16 bytes struct arguments [1]. Therefore, we
focus on the situation where scalars are at most XLEN bits and
aggregates whose total size does not exceed 2×XLEN bits in the riscv
calling convention [2].
Link: https://elixir.bootlin.com/linux/v6.8/source/kernel/bpf/btf.c#L6184 [0]
Link: https://elixir.bootlin.com/linux/v6.8/source/kernel/bpf/btf.c#L6769 [1]
Link: https://github.com/riscv-non-isa/riscv-elf-psabi-doc/releases/download/draft-20230929-e5c800e661a53efe3c2678d71a306323b60eb13b/riscv-abi.pdf [2]
v4:
- Separate many args test logic from tracing_struct. (Daniel)
v3: https://lore.kernel.org/all/20240403072818.1462811-1-pulehui@huaweicloud.com/
- Variable and macro name alignment:
nr_reg_args: number of args in reg
nr_stack_args: number of args on stack
RV_MAX_REG_ARGS: macro for riscv max args in reg
v2: https://lore.kernel.org/all/20240403041710.1416369-1-pulehui@huaweicloud.com/
- Add tracing_struct to DENYLIST.aarch64 while aarch64 does not yet support
bpf trampoline with more than 8 args.
- Change the macro RV_MAX_ARG_REGS to RV_MAX_ARGS_REG to synchronize with
the variable definition below.
- Add some comments for stk_arg_off and magic number of skip slots for loading
args on stack.
v1: https://lore.kernel.org/all/20240331092405.822571-1-pulehui@huaweicloud.com/
Pu Lehui (3):
riscv, bpf: Add 12-argument support for RV64 bpf trampoline
selftests/bpf: Factor out many args tests from tracing_struct
selftests/bpf: Add testcase where 7th argment is struct
arch/riscv/net/bpf_jit_comp64.c | 66 +++++++++----
tools/testing/selftests/bpf/DENYLIST.aarch64 | 1 +
.../selftests/bpf/bpf_testmod/bpf_testmod.c | 19 ++++
.../selftests/bpf/prog_tests/tracing_struct.c | 46 ++++++++-
.../selftests/bpf/progs/tracing_struct.c | 54 -----------
.../bpf/progs/tracing_struct_many_args.c | 97 +++++++++++++++++++
6 files changed, 206 insertions(+), 77 deletions(-)
create mode 100644 tools/testing/selftests/bpf/progs/tracing_struct_many_args.c
--
2.34.1
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH RESEND bpf-next v4 1/3] riscv, bpf: Add 12-argument support for RV64 bpf trampoline
2024-06-22 2:21 [PATCH RESEND bpf-next v4 0/3] Add 12-argument support for RV64 bpf trampoline Pu Lehui
@ 2024-06-22 2:21 ` Pu Lehui
2024-06-22 2:21 ` [PATCH RESEND bpf-next v4 2/3] selftests/bpf: Factor out many args tests from tracing_struct Pu Lehui
2024-06-22 2:21 ` [PATCH RESEND bpf-next v4 3/3] selftests/bpf: Add testcase where 7th argment is struct Pu Lehui
2 siblings, 0 replies; 6+ messages in thread
From: Pu Lehui @ 2024-06-22 2:21 UTC (permalink / raw)
To: bpf, linux-riscv, netdev
Cc: Björn Töpel, Alexei Starovoitov, Daniel Borkmann,
Andrii Nakryiko, Martin KaFai Lau, Eduard Zingerman, Song Liu,
Yonghong Song, John Fastabend, KP Singh, Stanislav Fomichev,
Hao Luo, Jiri Olsa, Puranjay Mohan, Palmer Dabbelt, Pu Lehui
From: Pu Lehui <pulehui@huawei.com>
This patch adds 12 function arguments support for riscv64 bpf
trampoline. The current bpf trampoline supports <= sizeof(u64) bytes
scalar arguments [0] and <= 16 bytes struct arguments [1]. Therefore, we
focus on the situation where scalars are at most XLEN bits and
aggregates whose total size does not exceed 2×XLEN bits in the riscv
calling convention [2].
Link: https://elixir.bootlin.com/linux/v6.8/source/kernel/bpf/btf.c#L6184 [0]
Link: https://elixir.bootlin.com/linux/v6.8/source/kernel/bpf/btf.c#L6769 [1]
Link: https://github.com/riscv-non-isa/riscv-elf-psabi-doc/releases/download/draft-20230929-e5c800e661a53efe3c2678d71a306323b60eb13b/riscv-abi.pdf [2]
Signed-off-by: Pu Lehui <pulehui@huawei.com>
Acked-by: Björn Töpel <bjorn@kernel.org>
Reviewed-by: Björn Töpel <bjorn@rivosinc.com>
---
arch/riscv/net/bpf_jit_comp64.c | 66 +++++++++++++++++++++++----------
1 file changed, 47 insertions(+), 19 deletions(-)
diff --git a/arch/riscv/net/bpf_jit_comp64.c b/arch/riscv/net/bpf_jit_comp64.c
index d5cebb0b0afe..61c85d97c4fc 100644
--- a/arch/riscv/net/bpf_jit_comp64.c
+++ b/arch/riscv/net/bpf_jit_comp64.c
@@ -15,6 +15,7 @@
#include <asm/percpu.h>
#include "bpf_jit.h"
+#define RV_MAX_REG_ARGS 8
#define RV_FENTRY_NINSNS 2
#define RV_REG_TCC RV_REG_A6
@@ -690,26 +691,45 @@ int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type poke_type,
return ret;
}
-static void store_args(int nregs, int args_off, struct rv_jit_context *ctx)
+static void store_args(int nr_arg_slots, int args_off, struct rv_jit_context *ctx)
{
int i;
- for (i = 0; i < nregs; i++) {
- emit_sd(RV_REG_FP, -args_off, RV_REG_A0 + i, ctx);
+ for (i = 0; i < nr_arg_slots; i++) {
+ if (i < RV_MAX_REG_ARGS) {
+ emit_sd(RV_REG_FP, -args_off, RV_REG_A0 + i, ctx);
+ } else {
+ /* skip slots for T0 and FP of traced function */
+ emit_ld(RV_REG_T1, 16 + (i - RV_MAX_REG_ARGS) * 8, RV_REG_FP, ctx);
+ emit_sd(RV_REG_FP, -args_off, RV_REG_T1, ctx);
+ }
args_off -= 8;
}
}
-static void restore_args(int nregs, int args_off, struct rv_jit_context *ctx)
+static void restore_args(int nr_reg_args, int args_off, struct rv_jit_context *ctx)
{
int i;
- for (i = 0; i < nregs; i++) {
+ for (i = 0; i < nr_reg_args; i++) {
emit_ld(RV_REG_A0 + i, -args_off, RV_REG_FP, ctx);
args_off -= 8;
}
}
+static void restore_stack_args(int nr_stack_args, int args_off, int stk_arg_off,
+ struct rv_jit_context *ctx)
+{
+ int i;
+
+ for (i = 0; i < nr_stack_args; i++) {
+ emit_ld(RV_REG_T1, -(args_off - RV_MAX_REG_ARGS * 8), RV_REG_FP, ctx);
+ emit_sd(RV_REG_FP, -stk_arg_off, RV_REG_T1, ctx);
+ args_off -= 8;
+ stk_arg_off -= 8;
+ }
+}
+
static int invoke_bpf_prog(struct bpf_tramp_link *l, int args_off, int retval_off,
int run_ctx_off, bool save_ret, struct rv_jit_context *ctx)
{
@@ -782,8 +802,8 @@ static int __arch_prepare_bpf_trampoline(struct bpf_tramp_image *im,
{
int i, ret, offset;
int *branches_off = NULL;
- int stack_size = 0, nregs = m->nr_args;
- int retval_off, args_off, nregs_off, ip_off, run_ctx_off, sreg_off;
+ int stack_size = 0, nr_arg_slots = 0;
+ int retval_off, args_off, nregs_off, ip_off, run_ctx_off, sreg_off, stk_arg_off;
struct bpf_tramp_links *fentry = &tlinks[BPF_TRAMP_FENTRY];
struct bpf_tramp_links *fexit = &tlinks[BPF_TRAMP_FEXIT];
struct bpf_tramp_links *fmod_ret = &tlinks[BPF_TRAMP_MODIFY_RETURN];
@@ -829,20 +849,21 @@ static int __arch_prepare_bpf_trampoline(struct bpf_tramp_image *im,
* FP - sreg_off [ callee saved reg ]
*
* [ pads ] pads for 16 bytes alignment
+ *
+ * [ stack_argN ]
+ * [ ... ]
+ * FP - stk_arg_off [ stack_arg1 ] BPF_TRAMP_F_CALL_ORIG
*/
if (flags & (BPF_TRAMP_F_ORIG_STACK | BPF_TRAMP_F_SHARE_IPMODIFY))
return -ENOTSUPP;
- /* extra regiters for struct arguments */
- for (i = 0; i < m->nr_args; i++)
- if (m->arg_flags[i] & BTF_FMODEL_STRUCT_ARG)
- nregs += round_up(m->arg_size[i], 8) / 8 - 1;
-
- /* 8 arguments passed by registers */
- if (nregs > 8)
+ if (m->nr_args > MAX_BPF_FUNC_ARGS)
return -ENOTSUPP;
+ for (i = 0; i < m->nr_args; i++)
+ nr_arg_slots += round_up(m->arg_size[i], 8) / 8;
+
/* room of trampoline frame to store return address and frame pointer */
stack_size += 16;
@@ -852,7 +873,7 @@ static int __arch_prepare_bpf_trampoline(struct bpf_tramp_image *im,
retval_off = stack_size;
}
- stack_size += nregs * 8;
+ stack_size += nr_arg_slots * 8;
args_off = stack_size;
stack_size += 8;
@@ -869,8 +890,14 @@ static int __arch_prepare_bpf_trampoline(struct bpf_tramp_image *im,
stack_size += 8;
sreg_off = stack_size;
+ if (nr_arg_slots - RV_MAX_REG_ARGS > 0)
+ stack_size += (nr_arg_slots - RV_MAX_REG_ARGS) * 8;
+
stack_size = round_up(stack_size, STACK_ALIGN);
+ /* room for args on stack must be at the top of stack */
+ stk_arg_off = stack_size;
+
if (!is_struct_ops) {
/* For the trampoline called from function entry,
* the frame of traced function and the frame of
@@ -906,10 +933,10 @@ static int __arch_prepare_bpf_trampoline(struct bpf_tramp_image *im,
emit_sd(RV_REG_FP, -ip_off, RV_REG_T1, ctx);
}
- emit_li(RV_REG_T1, nregs, ctx);
+ emit_li(RV_REG_T1, nr_arg_slots, ctx);
emit_sd(RV_REG_FP, -nregs_off, RV_REG_T1, ctx);
- store_args(nregs, args_off, ctx);
+ store_args(nr_arg_slots, args_off, ctx);
/* skip to actual body of traced function */
if (flags & BPF_TRAMP_F_SKIP_FRAME)
@@ -949,7 +976,8 @@ static int __arch_prepare_bpf_trampoline(struct bpf_tramp_image *im,
}
if (flags & BPF_TRAMP_F_CALL_ORIG) {
- restore_args(nregs, args_off, ctx);
+ restore_args(min_t(int, nr_arg_slots, RV_MAX_REG_ARGS), args_off, ctx);
+ restore_stack_args(nr_arg_slots - RV_MAX_REG_ARGS, args_off, stk_arg_off, ctx);
ret = emit_call((const u64)orig_call, true, ctx);
if (ret)
goto out;
@@ -984,7 +1012,7 @@ static int __arch_prepare_bpf_trampoline(struct bpf_tramp_image *im,
}
if (flags & BPF_TRAMP_F_RESTORE_REGS)
- restore_args(nregs, args_off, ctx);
+ restore_args(min_t(int, nr_arg_slots, RV_MAX_REG_ARGS), args_off, ctx);
if (save_ret) {
emit_ld(RV_REG_A0, -retval_off, RV_REG_FP, ctx);
--
2.34.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH RESEND bpf-next v4 2/3] selftests/bpf: Factor out many args tests from tracing_struct
2024-06-22 2:21 [PATCH RESEND bpf-next v4 0/3] Add 12-argument support for RV64 bpf trampoline Pu Lehui
2024-06-22 2:21 ` [PATCH RESEND bpf-next v4 1/3] riscv, bpf: " Pu Lehui
@ 2024-06-22 2:21 ` Pu Lehui
2024-07-01 16:12 ` Daniel Borkmann
2024-06-22 2:21 ` [PATCH RESEND bpf-next v4 3/3] selftests/bpf: Add testcase where 7th argment is struct Pu Lehui
2 siblings, 1 reply; 6+ messages in thread
From: Pu Lehui @ 2024-06-22 2:21 UTC (permalink / raw)
To: bpf, linux-riscv, netdev
Cc: Björn Töpel, Alexei Starovoitov, Daniel Borkmann,
Andrii Nakryiko, Martin KaFai Lau, Eduard Zingerman, Song Liu,
Yonghong Song, John Fastabend, KP Singh, Stanislav Fomichev,
Hao Luo, Jiri Olsa, Puranjay Mohan, Palmer Dabbelt, Pu Lehui
From: Pu Lehui <pulehui@huawei.com>
Factor out many args tests from tracing_struct and rename some function
names to make more sense.
Signed-off-by: Pu Lehui <pulehui@huawei.com>
---
.../selftests/bpf/prog_tests/tracing_struct.c | 32 ++++++++--
.../selftests/bpf/progs/tracing_struct.c | 54 ----------------
.../bpf/progs/tracing_struct_many_args.c | 62 +++++++++++++++++++
3 files changed, 90 insertions(+), 58 deletions(-)
create mode 100644 tools/testing/selftests/bpf/progs/tracing_struct_many_args.c
diff --git a/tools/testing/selftests/bpf/prog_tests/tracing_struct.c b/tools/testing/selftests/bpf/prog_tests/tracing_struct.c
index fe0fb0c9849a..2820fd912f2f 100644
--- a/tools/testing/selftests/bpf/prog_tests/tracing_struct.c
+++ b/tools/testing/selftests/bpf/prog_tests/tracing_struct.c
@@ -3,8 +3,9 @@
#include <test_progs.h>
#include "tracing_struct.skel.h"
+#include "tracing_struct_many_args.skel.h"
-static void test_fentry(void)
+static void test_struct_args(void)
{
struct tracing_struct *skel;
int err;
@@ -55,6 +56,26 @@ static void test_fentry(void)
ASSERT_EQ(skel->bss->t6, 1, "t6 ret");
+ tracing_struct__detach(skel);
+destroy_skel:
+ tracing_struct__destroy(skel);
+}
+
+static void test_struct_many_args(void)
+{
+ struct tracing_struct_many_args *skel;
+ int err;
+
+ skel = tracing_struct_many_args__open_and_load();
+ if (!ASSERT_OK_PTR(skel, "tracing_struct_many_args__open_and_load"))
+ return;
+
+ err = tracing_struct_many_args__attach(skel);
+ if (!ASSERT_OK(err, "tracing_struct_many_args__attach"))
+ goto destroy_skel;
+
+ ASSERT_OK(trigger_module_test_read(256), "trigger_read");
+
ASSERT_EQ(skel->bss->t7_a, 16, "t7:a");
ASSERT_EQ(skel->bss->t7_b, 17, "t7:b");
ASSERT_EQ(skel->bss->t7_c, 18, "t7:c");
@@ -74,12 +95,15 @@ static void test_fentry(void)
ASSERT_EQ(skel->bss->t8_g, 23, "t8:g");
ASSERT_EQ(skel->bss->t8_ret, 156, "t8 ret");
- tracing_struct__detach(skel);
+ tracing_struct_many_args__detach(skel);
destroy_skel:
- tracing_struct__destroy(skel);
+ tracing_struct_many_args__destroy(skel);
}
void test_tracing_struct(void)
{
- test_fentry();
+ if (test__start_subtest("struct_args"))
+ test_struct_args();
+ if (test__start_subtest("struct_many_args"))
+ test_struct_many_args();
}
diff --git a/tools/testing/selftests/bpf/progs/tracing_struct.c b/tools/testing/selftests/bpf/progs/tracing_struct.c
index 515daef3c84b..c435a3a8328a 100644
--- a/tools/testing/selftests/bpf/progs/tracing_struct.c
+++ b/tools/testing/selftests/bpf/progs/tracing_struct.c
@@ -18,11 +18,6 @@ struct bpf_testmod_struct_arg_3 {
int b[];
};
-struct bpf_testmod_struct_arg_4 {
- u64 a;
- int b;
-};
-
long t1_a_a, t1_a_b, t1_b, t1_c, t1_ret, t1_nregs;
__u64 t1_reg0, t1_reg1, t1_reg2, t1_reg3;
long t2_a, t2_b_a, t2_b_b, t2_c, t2_ret;
@@ -30,9 +25,6 @@ long t3_a, t3_b, t3_c_a, t3_c_b, t3_ret;
long t4_a_a, t4_b, t4_c, t4_d, t4_e_a, t4_e_b, t4_ret;
long t5_ret;
int t6;
-long t7_a, t7_b, t7_c, t7_d, t7_e, t7_f_a, t7_f_b, t7_ret;
-long t8_a, t8_b, t8_c, t8_d, t8_e, t8_f_a, t8_f_b, t8_g, t8_ret;
-
SEC("fentry/bpf_testmod_test_struct_arg_1")
int BPF_PROG2(test_struct_arg_1, struct bpf_testmod_struct_arg_2, a, int, b, int, c)
@@ -138,50 +130,4 @@ int BPF_PROG2(test_struct_arg_11, struct bpf_testmod_struct_arg_3 *, a)
return 0;
}
-SEC("fentry/bpf_testmod_test_struct_arg_7")
-int BPF_PROG2(test_struct_arg_12, __u64, a, void *, b, short, c, int, d,
- void *, e, struct bpf_testmod_struct_arg_4, f)
-{
- t7_a = a;
- t7_b = (long)b;
- t7_c = c;
- t7_d = d;
- t7_e = (long)e;
- t7_f_a = f.a;
- t7_f_b = f.b;
- return 0;
-}
-
-SEC("fexit/bpf_testmod_test_struct_arg_7")
-int BPF_PROG2(test_struct_arg_13, __u64, a, void *, b, short, c, int, d,
- void *, e, struct bpf_testmod_struct_arg_4, f, int, ret)
-{
- t7_ret = ret;
- return 0;
-}
-
-SEC("fentry/bpf_testmod_test_struct_arg_8")
-int BPF_PROG2(test_struct_arg_14, __u64, a, void *, b, short, c, int, d,
- void *, e, struct bpf_testmod_struct_arg_4, f, int, g)
-{
- t8_a = a;
- t8_b = (long)b;
- t8_c = c;
- t8_d = d;
- t8_e = (long)e;
- t8_f_a = f.a;
- t8_f_b = f.b;
- t8_g = g;
- return 0;
-}
-
-SEC("fexit/bpf_testmod_test_struct_arg_8")
-int BPF_PROG2(test_struct_arg_15, __u64, a, void *, b, short, c, int, d,
- void *, e, struct bpf_testmod_struct_arg_4, f, int, g,
- int, ret)
-{
- t8_ret = ret;
- return 0;
-}
-
char _license[] SEC("license") = "GPL";
diff --git a/tools/testing/selftests/bpf/progs/tracing_struct_many_args.c b/tools/testing/selftests/bpf/progs/tracing_struct_many_args.c
new file mode 100644
index 000000000000..8bd696dc81d9
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/tracing_struct_many_args.c
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (C) 2024. Huawei Technologies Co., Ltd */
+
+#include <vmlinux.h>
+#include <bpf/bpf_tracing.h>
+#include <bpf/bpf_helpers.h>
+
+struct bpf_testmod_struct_arg_4 {
+ u64 a;
+ int b;
+};
+
+long t7_a, t7_b, t7_c, t7_d, t7_e, t7_f_a, t7_f_b, t7_ret;
+long t8_a, t8_b, t8_c, t8_d, t8_e, t8_f_a, t8_f_b, t8_g, t8_ret;
+
+SEC("fentry/bpf_testmod_test_struct_arg_7")
+int BPF_PROG2(test_struct_many_args_1, __u64, a, void *, b, short, c, int, d,
+ void *, e, struct bpf_testmod_struct_arg_4, f)
+{
+ t7_a = a;
+ t7_b = (long)b;
+ t7_c = c;
+ t7_d = d;
+ t7_e = (long)e;
+ t7_f_a = f.a;
+ t7_f_b = f.b;
+ return 0;
+}
+
+SEC("fexit/bpf_testmod_test_struct_arg_7")
+int BPF_PROG2(test_struct_many_args_2, __u64, a, void *, b, short, c, int, d,
+ void *, e, struct bpf_testmod_struct_arg_4, f, int, ret)
+{
+ t7_ret = ret;
+ return 0;
+}
+
+SEC("fentry/bpf_testmod_test_struct_arg_8")
+int BPF_PROG2(test_struct_many_args_3, __u64, a, void *, b, short, c, int, d,
+ void *, e, struct bpf_testmod_struct_arg_4, f, int, g)
+{
+ t8_a = a;
+ t8_b = (long)b;
+ t8_c = c;
+ t8_d = d;
+ t8_e = (long)e;
+ t8_f_a = f.a;
+ t8_f_b = f.b;
+ t8_g = g;
+ return 0;
+}
+
+SEC("fexit/bpf_testmod_test_struct_arg_8")
+int BPF_PROG2(test_struct_many_args_4, __u64, a, void *, b, short, c, int, d,
+ void *, e, struct bpf_testmod_struct_arg_4, f, int, g,
+ int, ret)
+{
+ t8_ret = ret;
+ return 0;
+}
+
+char _license[] SEC("license") = "GPL";
--
2.34.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH RESEND bpf-next v4 3/3] selftests/bpf: Add testcase where 7th argment is struct
2024-06-22 2:21 [PATCH RESEND bpf-next v4 0/3] Add 12-argument support for RV64 bpf trampoline Pu Lehui
2024-06-22 2:21 ` [PATCH RESEND bpf-next v4 1/3] riscv, bpf: " Pu Lehui
2024-06-22 2:21 ` [PATCH RESEND bpf-next v4 2/3] selftests/bpf: Factor out many args tests from tracing_struct Pu Lehui
@ 2024-06-22 2:21 ` Pu Lehui
2 siblings, 0 replies; 6+ messages in thread
From: Pu Lehui @ 2024-06-22 2:21 UTC (permalink / raw)
To: bpf, linux-riscv, netdev
Cc: Björn Töpel, Alexei Starovoitov, Daniel Borkmann,
Andrii Nakryiko, Martin KaFai Lau, Eduard Zingerman, Song Liu,
Yonghong Song, John Fastabend, KP Singh, Stanislav Fomichev,
Hao Luo, Jiri Olsa, Puranjay Mohan, Palmer Dabbelt, Pu Lehui
From: Pu Lehui <pulehui@huawei.com>
Add testcase where 7th argument is struct for architectures with 8
argument registers, and increase the complexity of the struct.
Signed-off-by: Pu Lehui <pulehui@huawei.com>
Acked-by: Björn Töpel <bjorn@kernel.org>
Reviewed-by: Björn Töpel <bjorn@rivosinc.com>
---
tools/testing/selftests/bpf/DENYLIST.aarch64 | 1 +
.../selftests/bpf/bpf_testmod/bpf_testmod.c | 19 ++++++++++
.../selftests/bpf/prog_tests/tracing_struct.c | 14 ++++++++
.../bpf/progs/tracing_struct_many_args.c | 35 +++++++++++++++++++
4 files changed, 69 insertions(+)
diff --git a/tools/testing/selftests/bpf/DENYLIST.aarch64 b/tools/testing/selftests/bpf/DENYLIST.aarch64
index 0445ac38bc07..3c7c3e79aa93 100644
--- a/tools/testing/selftests/bpf/DENYLIST.aarch64
+++ b/tools/testing/selftests/bpf/DENYLIST.aarch64
@@ -6,6 +6,7 @@ kprobe_multi_test # needs CONFIG_FPROBE
module_attach # prog 'kprobe_multi': failed to auto-attach: -95
fentry_test/fentry_many_args # fentry_many_args:FAIL:fentry_many_args_attach unexpected error: -524
fexit_test/fexit_many_args # fexit_many_args:FAIL:fexit_many_args_attach unexpected error: -524
+tracing_struct/struct_many_args # struct_many_args:FAIL:tracing_struct_many_args__attach unexpected error: -524
fill_link_info/kprobe_multi_link_info # bpf_program__attach_kprobe_multi_opts unexpected error: -95
fill_link_info/kretprobe_multi_link_info # bpf_program__attach_kprobe_multi_opts unexpected error: -95
fill_link_info/kprobe_multi_invalid_ubuff # bpf_program__attach_kprobe_multi_opts unexpected error: -95
diff --git a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c
index d8bd01d8560b..f8962a1dd397 100644
--- a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c
+++ b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c
@@ -53,6 +53,13 @@ struct bpf_testmod_struct_arg_4 {
int b;
};
+struct bpf_testmod_struct_arg_5 {
+ char a;
+ short b;
+ int c;
+ long d;
+};
+
__bpf_hook_start();
noinline int
@@ -110,6 +117,15 @@ bpf_testmod_test_struct_arg_8(u64 a, void *b, short c, int d, void *e,
return bpf_testmod_test_struct_arg_result;
}
+noinline int
+bpf_testmod_test_struct_arg_9(u64 a, void *b, short c, int d, void *e, char f,
+ short g, struct bpf_testmod_struct_arg_5 h, long i)
+{
+ bpf_testmod_test_struct_arg_result = a + (long)b + c + d + (long)e +
+ f + g + h.a + h.b + h.c + h.d + i;
+ return bpf_testmod_test_struct_arg_result;
+}
+
noinline int
bpf_testmod_test_arg_ptr_to_struct(struct bpf_testmod_struct_arg_1 *a) {
bpf_testmod_test_struct_arg_result = a->a;
@@ -305,6 +321,7 @@ bpf_testmod_test_read(struct file *file, struct kobject *kobj,
struct bpf_testmod_struct_arg_2 struct_arg2 = {2, 3};
struct bpf_testmod_struct_arg_3 *struct_arg3;
struct bpf_testmod_struct_arg_4 struct_arg4 = {21, 22};
+ struct bpf_testmod_struct_arg_5 struct_arg5 = {23, 24, 25, 26};
int i = 1;
while (bpf_testmod_return_ptr(i))
@@ -319,6 +336,8 @@ bpf_testmod_test_read(struct file *file, struct kobject *kobj,
(void *)20, struct_arg4);
(void)bpf_testmod_test_struct_arg_8(16, (void *)17, 18, 19,
(void *)20, struct_arg4, 23);
+ (void)bpf_testmod_test_struct_arg_9(16, (void *)17, 18, 19, (void *)20,
+ 21, 22, struct_arg5, 27);
(void)bpf_testmod_test_arg_ptr_to_struct(&struct_arg1_2);
diff --git a/tools/testing/selftests/bpf/prog_tests/tracing_struct.c b/tools/testing/selftests/bpf/prog_tests/tracing_struct.c
index 2820fd912f2f..1e7ac6fc34bf 100644
--- a/tools/testing/selftests/bpf/prog_tests/tracing_struct.c
+++ b/tools/testing/selftests/bpf/prog_tests/tracing_struct.c
@@ -95,6 +95,20 @@ static void test_struct_many_args(void)
ASSERT_EQ(skel->bss->t8_g, 23, "t8:g");
ASSERT_EQ(skel->bss->t8_ret, 156, "t8 ret");
+ ASSERT_EQ(skel->bss->t9_a, 16, "t9:a");
+ ASSERT_EQ(skel->bss->t9_b, 17, "t9:b");
+ ASSERT_EQ(skel->bss->t9_c, 18, "t9:c");
+ ASSERT_EQ(skel->bss->t9_d, 19, "t9:d");
+ ASSERT_EQ(skel->bss->t9_e, 20, "t9:e");
+ ASSERT_EQ(skel->bss->t9_f, 21, "t9:f");
+ ASSERT_EQ(skel->bss->t9_g, 22, "t9:f");
+ ASSERT_EQ(skel->bss->t9_h_a, 23, "t9:h.a");
+ ASSERT_EQ(skel->bss->t9_h_b, 24, "t9:h.b");
+ ASSERT_EQ(skel->bss->t9_h_c, 25, "t9:h.c");
+ ASSERT_EQ(skel->bss->t9_h_d, 26, "t9:h.d");
+ ASSERT_EQ(skel->bss->t9_i, 27, "t9:i");
+ ASSERT_EQ(skel->bss->t9_ret, 258, "t9 ret");
+
tracing_struct_many_args__detach(skel);
destroy_skel:
tracing_struct_many_args__destroy(skel);
diff --git a/tools/testing/selftests/bpf/progs/tracing_struct_many_args.c b/tools/testing/selftests/bpf/progs/tracing_struct_many_args.c
index 8bd696dc81d9..ea634a818345 100644
--- a/tools/testing/selftests/bpf/progs/tracing_struct_many_args.c
+++ b/tools/testing/selftests/bpf/progs/tracing_struct_many_args.c
@@ -10,8 +10,16 @@ struct bpf_testmod_struct_arg_4 {
int b;
};
+struct bpf_testmod_struct_arg_5 {
+ char a;
+ short b;
+ int c;
+ long d;
+};
+
long t7_a, t7_b, t7_c, t7_d, t7_e, t7_f_a, t7_f_b, t7_ret;
long t8_a, t8_b, t8_c, t8_d, t8_e, t8_f_a, t8_f_b, t8_g, t8_ret;
+long t9_a, t9_b, t9_c, t9_d, t9_e, t9_f, t9_g, t9_h_a, t9_h_b, t9_h_c, t9_h_d, t9_i, t9_ret;
SEC("fentry/bpf_testmod_test_struct_arg_7")
int BPF_PROG2(test_struct_many_args_1, __u64, a, void *, b, short, c, int, d,
@@ -59,4 +67,31 @@ int BPF_PROG2(test_struct_many_args_4, __u64, a, void *, b, short, c, int, d,
return 0;
}
+SEC("fentry/bpf_testmod_test_struct_arg_9")
+int BPF_PROG2(test_struct_many_args_5, __u64, a, void *, b, short, c, int, d, void *, e,
+ char, f, short, g, struct bpf_testmod_struct_arg_5, h, long, i)
+{
+ t9_a = a;
+ t9_b = (long)b;
+ t9_c = c;
+ t9_d = d;
+ t9_e = (long)e;
+ t9_f = f;
+ t9_g = g;
+ t9_h_a = h.a;
+ t9_h_b = h.b;
+ t9_h_c = h.c;
+ t9_h_d = h.d;
+ t9_i = i;
+ return 0;
+}
+
+SEC("fexit/bpf_testmod_test_struct_arg_9")
+int BPF_PROG2(test_struct_many_args_6, __u64, a, void *, b, short, c, int, d, void *, e,
+ char, f, short, g, struct bpf_testmod_struct_arg_5, h, long, i, int, ret)
+{
+ t9_ret = ret;
+ return 0;
+}
+
char _license[] SEC("license") = "GPL";
--
2.34.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH RESEND bpf-next v4 2/3] selftests/bpf: Factor out many args tests from tracing_struct
2024-06-22 2:21 ` [PATCH RESEND bpf-next v4 2/3] selftests/bpf: Factor out many args tests from tracing_struct Pu Lehui
@ 2024-07-01 16:12 ` Daniel Borkmann
2024-07-02 1:24 ` Pu Lehui
0 siblings, 1 reply; 6+ messages in thread
From: Daniel Borkmann @ 2024-07-01 16:12 UTC (permalink / raw)
To: Pu Lehui, bpf, linux-riscv, netdev
Cc: Björn Töpel, Alexei Starovoitov, Andrii Nakryiko,
Martin KaFai Lau, Eduard Zingerman, Song Liu, Yonghong Song,
John Fastabend, KP Singh, Stanislav Fomichev, Hao Luo, Jiri Olsa,
Puranjay Mohan, Palmer Dabbelt, Pu Lehui
On 6/22/24 4:21 AM, Pu Lehui wrote:
> From: Pu Lehui <pulehui@huawei.com>
>
> Factor out many args tests from tracing_struct and rename some function
> names to make more sense.
>
> Signed-off-by: Pu Lehui <pulehui@huawei.com>
[...]
> diff --git a/tools/testing/selftests/bpf/progs/tracing_struct_many_args.c b/tools/testing/selftests/bpf/progs/tracing_struct_many_args.c
> new file mode 100644
> index 000000000000..8bd696dc81d9
> --- /dev/null
> +++ b/tools/testing/selftests/bpf/progs/tracing_struct_many_args.c
> @@ -0,0 +1,62 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/* Copyright (C) 2024. Huawei Technologies Co., Ltd */
Overall looks good and ready to land, one small request: lets drop the copyright
comment here since this commit is only moving the existing tests out to its own
file which have been added originally via 5e9cf77d81f9 ("selftests/bpf: add testcase
for TRACING with 6+ arguments").
Thanks,
Daniel
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH RESEND bpf-next v4 2/3] selftests/bpf: Factor out many args tests from tracing_struct
2024-07-01 16:12 ` Daniel Borkmann
@ 2024-07-02 1:24 ` Pu Lehui
0 siblings, 0 replies; 6+ messages in thread
From: Pu Lehui @ 2024-07-02 1:24 UTC (permalink / raw)
To: Daniel Borkmann, Pu Lehui, bpf, linux-riscv, netdev
Cc: Björn Töpel, Alexei Starovoitov, Andrii Nakryiko,
Martin KaFai Lau, Eduard Zingerman, Song Liu, Yonghong Song,
John Fastabend, KP Singh, Stanislav Fomichev, Hao Luo, Jiri Olsa,
Puranjay Mohan, Palmer Dabbelt
On 2024/7/2 0:12, Daniel Borkmann wrote:
> On 6/22/24 4:21 AM, Pu Lehui wrote:
>> From: Pu Lehui <pulehui@huawei.com>
>>
>> Factor out many args tests from tracing_struct and rename some function
>> names to make more sense.
>>
>> Signed-off-by: Pu Lehui <pulehui@huawei.com>
> [...]
>> diff --git
>> a/tools/testing/selftests/bpf/progs/tracing_struct_many_args.c
>> b/tools/testing/selftests/bpf/progs/tracing_struct_many_args.c
>> new file mode 100644
>> index 000000000000..8bd696dc81d9
>> --- /dev/null
>> +++ b/tools/testing/selftests/bpf/progs/tracing_struct_many_args.c
>> @@ -0,0 +1,62 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/* Copyright (C) 2024. Huawei Technologies Co., Ltd */
>
> Overall looks good and ready to land, one small request: lets drop the
> copyright
Sure, will drop it in next version.
> comment here since this commit is only moving the existing tests out to
> its own
> file which have been added originally via 5e9cf77d81f9 ("selftests/bpf:
> add testcase
> for TRACING with 6+ arguments").
>
> Thanks,
> Daniel
>
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2024-07-02 1:24 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2024-06-22 2:21 [PATCH RESEND bpf-next v4 0/3] Add 12-argument support for RV64 bpf trampoline Pu Lehui
2024-06-22 2:21 ` [PATCH RESEND bpf-next v4 1/3] riscv, bpf: " Pu Lehui
2024-06-22 2:21 ` [PATCH RESEND bpf-next v4 2/3] selftests/bpf: Factor out many args tests from tracing_struct Pu Lehui
2024-07-01 16:12 ` Daniel Borkmann
2024-07-02 1:24 ` Pu Lehui
2024-06-22 2:21 ` [PATCH RESEND bpf-next v4 3/3] selftests/bpf: Add testcase where 7th argment is struct Pu Lehui
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