diff options
| author | Hari Bathini <hbathini@linux.ibm.com> | 2025-09-16 10:10:35 +0530 |
|---|---|---|
| committer | Madhavan Srinivasan <maddy@linux.ibm.com> | 2025-09-16 16:13:00 +0530 |
| commit | 7cec88bfdd33434d62d4d5ba664127fa175b50e7 (patch) | |
| tree | d12ba3f9d872088f86d8312decae628a680df425 | |
| parent | d733f18a6da6fb719450d5122162556d785ed580 (diff) | |
powerpc/fprobe: fix updated fprobe for function-graph tracer
Since commit 4346ba160409 ("fprobe: Rewrite fprobe on function-graph
tracer"), FPROBE depends on HAVE_FUNCTION_GRAPH_FREGS. With previous
patch adding HAVE_FUNCTION_GRAPH_FREGS for powerpc, FPROBE can be
enabled on powerpc. But with the commit b5fa903b7f7c ("fprobe: Add
fprobe_header encoding feature"), asm/fprobe.h header is needed to
define arch dependent encode/decode macros. The fprobe header MSB
pattern on powerpc is not 0xf. So, define FPROBE_HEADER_MSB_PATTERN
expected on powerpc.
Also, commit 762abbc0d09f ("fprobe: Use ftrace_regs in fprobe exit
handler") introduced HAVE_FTRACE_REGS_HAVING_PT_REGS for archs that
have pt_regs in ftrace_regs. Advertise that on powerpc to reuse
common definitions like ftrace_partial_regs().
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Signed-off-by: Aditya Bodkhe <aditya.b1@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20250916044035.29033-2-adityab1@linux.ibm.com
| -rw-r--r-- | arch/powerpc/Kconfig | 1 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/fprobe.h | 12 |
2 files changed, 13 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 449404d3932b..325c1171894d 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -243,6 +243,7 @@ config PPC select HAVE_EFFICIENT_UNALIGNED_ACCESS select HAVE_GUP_FAST select HAVE_FTRACE_GRAPH_FUNC + select HAVE_FTRACE_REGS_HAVING_PT_REGS select HAVE_FUNCTION_ARG_ACCESS_API select HAVE_FUNCTION_DESCRIPTORS if PPC64_ELF_ABI_V1 select HAVE_FUNCTION_ERROR_INJECTION diff --git a/arch/powerpc/include/asm/fprobe.h b/arch/powerpc/include/asm/fprobe.h new file mode 100644 index 000000000000..d64bc28fb3d3 --- /dev/null +++ b/arch/powerpc/include/asm/fprobe.h @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_PPC_FPROBE_H +#define _ASM_PPC_FPROBE_H + +#include <asm-generic/fprobe.h> + +#ifdef CONFIG_64BIT +#undef FPROBE_HEADER_MSB_PATTERN +#define FPROBE_HEADER_MSB_PATTERN (PAGE_OFFSET & ~FPROBE_HEADER_MSB_MASK) +#endif + +#endif /* _ASM_PPC_FPROBE_H */ |