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Date: Wed, 10 May 2023 18:18:57 +0800
From: Song Shuai <suagrfillet@...il.com>
To: paul.walmsley@...ive.com, palmer@...belt.com,
aou@...s.berkeley.edu, rostedt@...dmis.org, mhiramat@...nel.org,
mark.rutland@....com, guoren@...nel.org, suagrfillet@...il.com,
jszhang@...nel.org, e.shatokhin@...ro.com
Cc: linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux-trace-kernel@...r.kernel.org
Subject: [PATCH V9 4/4] samples: ftrace: Add riscv support for SAMPLE_FTRACE_DIRECT[_MULTI]
select HAVE_SAMPLE_FTRACE_DIRECT and HAVE_SAMPLE_FTRACE_DIRECT_MULTI
for ARCH_RV64I in arch/riscv/Kconfig. And add riscv asm code for
the ftrace-direct*.c files in samples/ftrace/.
Link: https://lore.kernel.org/linux-riscv/c68bac83-5c88-80b1-bac9-e1fd4ea8f07e@yadro.com/T/#ma13012560331c66b051b580b3ab4a04ba44455ec
Tested-by: Evgenii Shatokhin <e.shatokhin@...ro.com>
Signed-off-by: Song Shuai <suagrfillet@...il.com>
Tested-by: Guo Ren <guoren@...nel.org>
Signed-off-by: Guo Ren <guoren@...nel.org>
---
arch/riscv/Kconfig | 2 ++
samples/ftrace/ftrace-direct-modify.c | 33 +++++++++++++++++
samples/ftrace/ftrace-direct-multi-modify.c | 39 +++++++++++++++++++++
samples/ftrace/ftrace-direct-multi.c | 23 ++++++++++++
samples/ftrace/ftrace-direct-too.c | 26 ++++++++++++++
samples/ftrace/ftrace-direct.c | 22 ++++++++++++
6 files changed, 145 insertions(+)
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index fdf0b219a02c..cb94ef086f0c 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -121,6 +121,8 @@ config RISCV
select HAVE_POSIX_CPU_TIMERS_TASK_WORK
select HAVE_REGS_AND_STACK_ACCESS_API
select HAVE_RSEQ
+ select HAVE_SAMPLE_FTRACE_DIRECT
+ select HAVE_SAMPLE_FTRACE_DIRECT_MULTI
select HAVE_STACKPROTECTOR
select HAVE_SYSCALL_TRACEPOINTS
select IRQ_DOMAIN
diff --git a/samples/ftrace/ftrace-direct-modify.c b/samples/ftrace/ftrace-direct-modify.c
index 06d889149012..b355e6994c5c 100644
--- a/samples/ftrace/ftrace-direct-modify.c
+++ b/samples/ftrace/ftrace-direct-modify.c
@@ -22,6 +22,39 @@ extern void my_tramp2(void *);
static unsigned long my_ip = (unsigned long)schedule;
+#ifdef CONFIG_RISCV
+
+asm (" .pushsection .text, \"ax\", @progbits\n"
+" .type my_tramp1, @function\n"
+" .globl my_tramp1\n"
+" my_tramp1:\n"
+" addi sp,sp,-16\n"
+" sd t0,0(sp)\n"
+" sd ra,8(sp)\n"
+" call my_direct_func1\n"
+" ld t0,0(sp)\n"
+" ld ra,8(sp)\n"
+" addi sp,sp,16\n"
+" jr t0\n"
+" .size my_tramp1, .-my_tramp1\n"
+
+" .type my_tramp2, @function\n"
+" .globl my_tramp2\n"
+" my_tramp2:\n"
+" addi sp,sp,-16\n"
+" sd t0,0(sp)\n"
+" sd ra,8(sp)\n"
+" call my_direct_func2\n"
+" ld t0,0(sp)\n"
+" ld ra,8(sp)\n"
+" addi sp,sp,16\n"
+" jr t0\n"
+" .size my_tramp2, .-my_tramp2\n"
+" .popsection\n"
+);
+
+#endif /* CONFIG_RISCV */
+
#ifdef CONFIG_X86_64
#include <asm/ibt.h>
diff --git a/samples/ftrace/ftrace-direct-multi-modify.c b/samples/ftrace/ftrace-direct-multi-modify.c
index 62f6b681999e..6a4ee86d1f70 100644
--- a/samples/ftrace/ftrace-direct-multi-modify.c
+++ b/samples/ftrace/ftrace-direct-multi-modify.c
@@ -20,6 +20,45 @@ void my_direct_func2(unsigned long ip)
extern void my_tramp1(void *);
extern void my_tramp2(void *);
+#ifdef CONFIG_RISCV
+
+asm (" .pushsection .text, \"ax\", @progbits\n"
+" .type my_tramp1, @function\n"
+" .globl my_tramp1\n"
+" my_tramp1:\n"
+" addi sp,sp,-24\n"
+" sd a0,0(sp)\n"
+" sd t0,8(sp)\n"
+" sd ra,16(sp)\n"
+" mv a0,t0\n"
+" call my_direct_func1\n"
+" ld a0,0(sp)\n"
+" ld t0,8(sp)\n"
+" ld ra,16(sp)\n"
+" addi sp,sp,24\n"
+" jr t0\n"
+" .size my_tramp1, .-my_tramp1\n"
+
+" .type my_tramp2, @function\n"
+" .globl my_tramp2\n"
+" my_tramp2:\n"
+" addi sp,sp,-24\n"
+" sd a0,0(sp)\n"
+" sd t0,8(sp)\n"
+" sd ra,16(sp)\n"
+" mv a0,t0\n"
+" call my_direct_func2\n"
+" ld a0,0(sp)\n"
+" ld t0,8(sp)\n"
+" ld ra,16(sp)\n"
+" addi sp,sp,24\n"
+" jr t0\n"
+" .size my_tramp2, .-my_tramp2\n"
+" .popsection\n"
+);
+
+#endif /* CONFIG_RISCV */
+
#ifdef CONFIG_X86_64
#include <asm/ibt.h>
diff --git a/samples/ftrace/ftrace-direct-multi.c b/samples/ftrace/ftrace-direct-multi.c
index 5482cf616b43..e00a33b7d3c2 100644
--- a/samples/ftrace/ftrace-direct-multi.c
+++ b/samples/ftrace/ftrace-direct-multi.c
@@ -15,6 +15,29 @@ void my_direct_func(unsigned long ip)
extern void my_tramp(void *);
+#ifdef CONFIG_RISCV
+
+asm (" .pushsection .text, \"ax\", @progbits\n"
+" .type my_tramp, @function\n"
+" .globl my_tramp\n"
+" my_tramp:\n"
+" addi sp,sp,-24\n"
+" sd a0,0(sp)\n"
+" sd t0,8(sp)\n"
+" sd ra,16(sp)\n"
+" mv a0,t0\n"
+" call my_direct_func\n"
+" ld a0,0(sp)\n"
+" ld t0,8(sp)\n"
+" ld ra,16(sp)\n"
+" addi sp,sp,24\n"
+" jr t0\n"
+" .size my_tramp, .-my_tramp\n"
+" .popsection\n"
+);
+
+#endif /* CONFIG_RISCV */
+
#ifdef CONFIG_X86_64
#include <asm/ibt.h>
diff --git a/samples/ftrace/ftrace-direct-too.c b/samples/ftrace/ftrace-direct-too.c
index a05bc2cc2261..af0b90c4d6d5 100644
--- a/samples/ftrace/ftrace-direct-too.c
+++ b/samples/ftrace/ftrace-direct-too.c
@@ -17,6 +17,32 @@ void my_direct_func(struct vm_area_struct *vma,
extern void my_tramp(void *);
+#ifdef CONFIG_RISCV
+
+asm (" .pushsection .text, \"ax\", @progbits\n"
+" .type my_tramp, @function\n"
+" .globl my_tramp\n"
+" my_tramp:\n"
+" addi sp,sp,-40\n"
+" sd a0,0(sp)\n"
+" sd a1,8(sp)\n"
+" sd a2,16(sp)\n"
+" sd t0,24(sp)\n"
+" sd ra,32(sp)\n"
+" call my_direct_func\n"
+" ld a0,0(sp)\n"
+" ld a1,8(sp)\n"
+" ld a2,16(sp)\n"
+" ld t0,24(sp)\n"
+" ld ra,32(sp)\n"
+" addi sp,sp,40\n"
+" jr t0\n"
+" .size my_tramp, .-my_tramp\n"
+" .popsection\n"
+);
+
+#endif /* CONFIG_RISCV */
+
#ifdef CONFIG_X86_64
#include <asm/ibt.h>
diff --git a/samples/ftrace/ftrace-direct.c b/samples/ftrace/ftrace-direct.c
index 06879bbd3399..47977e262291 100644
--- a/samples/ftrace/ftrace-direct.c
+++ b/samples/ftrace/ftrace-direct.c
@@ -14,6 +14,28 @@ void my_direct_func(struct task_struct *p)
extern void my_tramp(void *);
+#ifdef CONFIG_RISCV
+
+asm (" .pushsection .text, \"ax\", @progbits\n"
+" .type my_tramp, @function\n"
+" .globl my_tramp\n"
+" my_tramp:\n"
+" addi sp,sp,-24\n"
+" sd a0,0(sp)\n"
+" sd t0,8(sp)\n"
+" sd ra,16(sp)\n"
+" call my_direct_func\n"
+" ld a0,0(sp)\n"
+" ld t0,8(sp)\n"
+" ld ra,16(sp)\n"
+" addi sp,sp,24\n"
+" jr t0\n"
+" .size my_tramp, .-my_tramp\n"
+" .popsection\n"
+);
+
+#endif /* CONFIG_RISCV */
+
#ifdef CONFIG_X86_64
#include <asm/ibt.h>
--
2.20.1
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