Hello Vineet,
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc.git
> for-next
> head: e88856183749fd59759cd4c617f9ecec8280d8fa
> commit: b08a66fb680018b621fd8be641c537c625132ab3 [3/4] ARC: disasm: handle
> ARCv2 case in kprobe get/set functions
> config: arc-randconfig-r0
Fixes: b08a66fb680018b6 ("ARC: disasm: handle ARCv2 case in kprobe
get/set functions").
Signed-off-by: Sergey Matyukevich
Reported-by: kernel test robot
---
arch/arc/kernel/disasm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arc/kernel/disasm.c b/arch/
From: Sergey Matyukevich
Enable HAVE_REGS_AND_STACK_ACCESS_API feature for ARC architecture,
including ARCcompact and ARCv2 flavors. Add supporting functions
and defines.
Signed-off-by: Sergey Matyukevich
---
arch/arc/Kconfig | 1 +
arch/arc/include/asm/ptrace.h | 27
From: Sergey Matyukevich
Function syscall_trace_exit expects pointer to pt_regs. However
r0 is also used to keep syscall return value. Restore pointer
to pt_regs before calling syscall_trace_exit.
Signed-off-by: Sergey Matyukevich
---
arch/arc/kernel/entry.S | 1 +
1 file changed, 1 insertion
.
Regards,
Sergey
v1 -> v2:
- drop path with uapi for BPF_PROG_TYPE_PERF_EVENT program type: send it via
bpf mailing list
- add patch with ARCv2 changes for kprobe disasm
Sergey Matyukevich (4):
ARC: enable HAVE_REGS_AND_STACK_ACCESS_API feature
ARC: entry: fix syscall_trace_exit argum
From: Sergey Matyukevich
Implement all the bits required to support HAVE_SYSCALL_TRACEPOINTS
according to Documentation/trace/ftrace-design.rst.
Signed-off-by: Sergey Matyukevich
---
arch/arc/Kconfig | 1 +
arch/arc/include/asm/syscall.h | 2 ++
arch/arc/include/asm
From: Sergey Matyukevich
Current implementation of get_reg/set_reg implies ARCompact layout
of pt_regs structure. Meanwhile pt_regs structure differs between
ARCompact and ARCv2. Update those functions to handle ARCv2.
Signed-off-by: Sergey Matyukevich
---
arch/arc/kernel/disasm.c | 64
From: Sergey Matyukevich
Define appropriate uapi for the BPF_PROG_TYPE_PERF_EVENT program type
by exporting the user_regs_struct structure instead of the pt_regs
structure that is in-kernel only.
Signed-off-by: Sergey Matyukevich
---
arch/arc/include/asm/perf_event.h | 4
arch
From: Sergey Matyukevich
Implement all the bits required to support HAVE_SYSCALL_TRACEPOINTS
according to Documentation/trace/ftrace-design.rst.
Signed-off-by: Sergey Matyukevich
---
arch/arc/Kconfig | 1 +
arch/arc/include/asm/syscall.h | 2 ++
arch/arc/include/asm
From: Sergey Matyukevich
Enable HAVE_REGS_AND_STACK_ACCESS_API feature for ARC architecture,
including ARCcompact and ARCv2 flavors. Add supporting functions
and defines.
Signed-off-by: Sergey Matyukevich
---
arch/arc/Kconfig | 1 +
arch/arc/include/asm/ptrace.h | 27
Hi Vineet and all,
This patch set implements the following two features for ARC:
- HAVE_REGS_AND_STACK_ACCESS_API
- HAVE_SYSCALL_TRACEPOINTS
Adding these features enables more BPF programs for ARC kernels,
including KPROBE, TRACEPOINT, PERF_EVENT program types.
Regards,
Sergey
Sergey
From: Sergey Matyukevich
Function syscall_trace_exit expects pointer to pt_regs. However
r0 is also used to keep syscall return value. Restore pointer
to pt_regs before calling syscall_trace_exit.
Signed-off-by: Sergey Matyukevich
---
arch/arc/kernel/entry.S | 1 +
1 file changed, 1 insertion
Hi Vineet,
> Thx for doing this. I think the series mixes a few things not related to ZOL
> removal - the changelog for removal of -Os specific code seems incorrect
> etc.
> Let me repost with slight more cleanups.
Let me know if you don't have capacity to work on v2 at the moment.
In this case
Hi Vineet,
> Thx for doing this. I think the series mixes a few things not related to ZOL
> removal - the changelog for removal of -Os specific code seems incorrect
> etc.
> Let me repost with slight more cleanups.
Great. I will help with testing of the updated version.
Regards,
Sergey
From: Vineet Gupta
Inhibit ZOL generation by compiler if configuration states
the lack of it. This is done before we remove the ZOL regs
save/restore in entry code
Signed-off-by: Vineet Gupta
---
arch/arc/Makefile | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arc/Makefile b/arch/a
From: Vineet Gupta
- Entry code (interrupts/exceptions) need not save/restore ZOL regs
- Any userspace ZOL references (ptrace, signal frame, process start)
reworked such that ZOL regs are Zero-on-read, Ingore-on-write since
the ptrace ABI need not change
Signed-off-by: Vineet Gupta
---
arc
From: Vineet Gupta
Add checksum implementation based on double load/stores
if ZOL is not supported.
Signed-off-by: Vineet Gupta
---
arch/arc/include/asm/checksum.h | 58 ++---
1 file changed, 53 insertions(+), 5 deletions(-)
diff --git a/arch/arc/include/asm/checks
From: Vineet Gupta
Add entry implementation based on double load/stores
if ZOL is not supported.
Signed-off-by: Vineet Gupta
---
arch/arc/include/asm/asm-macro-ll64-emul.h | 3 +++
arch/arc/include/asm/entry.h | 2 ++
arch/arc/kernel/head.S | 8 +++-
arch/
From: Vineet Gupta
Add __delay implementation based on DBNZ if ZOL is not supported.
Signed-off-by: Vineet Gupta
---
arch/arc/include/asm/delay.h | 16
1 file changed, 16 insertions(+)
diff --git a/arch/arc/include/asm/delay.h b/arch/arc/include/asm/delay.h
index 54db798f0aa0
From: Vineet Gupta
Switch to generic C code when ZOL is not supported.
Generic code lacks memzero, so define it.
Signed-off-by: Vineet Gupta
---
arch/arc/include/asm/string.h | 15 ++-
arch/arc/kernel/arcksyms.c| 2 ++
arch/arc/lib/Makefile | 4
3 files changed,
From: Vineet Gupta
Signed-off-by: Vineet Gupta
---
arch/arc/lib/memset-archs.S | 112 ++--
1 file changed, 43 insertions(+), 69 deletions(-)
diff --git a/arch/arc/lib/memset-archs.S b/arch/arc/lib/memset-archs.S
index 330e22f7cf3c..a9a0ccef761d 100644
--- a/arch
From: Vineet Gupta
Upcoming ARCv3 lacks ZOL support, so provide alternative
uaccess implementations based on 64-bit memory operations.
Signed-off-by: Vineet Gupta
---
arch/arc/include/asm/asm-macro-ll64-emul.h | 28
arch/arc/include/asm/asm-macro-ll64.h | 20 +++
arch/arc/include/a
From: Vineet Gupta
The only functional change is eliding the unaligned buffer head
handling. Also cleanup macros adding argument default values.
Signed-off-by: Vineet Gupta
---
arch/arc/lib/memset-archs.S | 34 +-
1 file changed, 17 insertions(+), 17 deletions(-
From: Vineet Gupta
This avoids potential "bleeding" when size == 0 as cache line
would be dirtied (and possibly fetched from other cores) and
due to the same reasons more optimal too.
Signed-off-by: Vineet Gupta
---
arch/arc/lib/memset-archs.S | 3 ++-
1 file changed, 2 insertions(+), 1 deleti
From: Vineet Gupta
Currently ARC uses CC_OPTIMIZE_FOR_PERFORMANCE_O3, which excludes
CC_OPTIMIZE_FOR_SIZE. So drop unused define branch.
Signed-off-by: Vineet Gupta
---
arch/arc/include/asm/uaccess.h | 11 ++-
arch/arc/mm/extable.c | 11 ---
2 files changed, 2 insertio
From: Sergey Matyukevich
Hi Vineet and all,
This patch series continues to prepare arch/arc for the upcoming ARCv3
support. ARCv3 does not support zero-overhead-loop (ZOL). So this patch
series provides a set of changes that make ZOL support optional.
The patch series is based on top of Linux
From: Vineet Gupta
Upcoming ARCv3 lacks ZOL support, so provide alternatives
based on DBNZ instruction inrtroduced in ARCv2.
Signed-off-by: Vineet Gupta
---
arch/arc/Kconfig | 10
arch/arc/Makefile | 1 +
arch/arc/include/asm/asm-mac
From: Vineet Gupta
Signed-off-by: Vineet Gupta
---
arch/arc/include/asm/uaccess.h | 10 ++
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/arch/arc/include/asm/uaccess.h b/arch/arc/include/asm/uaccess.h
index 783bfdb3bfa3..d78aae76831f 100644
--- a/arch/arc/include/asm/uac
From: Sergey Matyukevich
Hi Vineet and all,
This patch set provides cleanup for atomic-llsc code and fixes for
unwanted compiler optimizations in ARCv2 32bit and 64bit atomics.
Regards,
Sergey
Sergey Matyukevich (2):
ARC: atomic: cleanup atomic-llsc definitions
ARC: atomic: avoid unwanted
From: Sergey Matyukevich
All the llock/scond based atomic operations read and write atomic counter
field. However write operation performed by the scond instruction is not
properly communicated to the compiler: inline assembly shows atomic
argument as an input parameter and its clobber list does
From: Sergey Matyukevich
Remove redundant c_op macro argument. Only asm_op is needed
to define atomic operations using llock/scond.
Signed-off-by: Sergey Matyukevich
---
arch/arc/include/asm/atomic-llsc.h | 32 +++---
1 file changed, 16 insertions(+), 16 deletions
CONFIG_SET_FS gone, so drop all remaining references to
> set_fs()/get_fs(), mm_segment_t and uaccess_kernel().
>
> Signed-off-by: Arnd Bergmann
Tested-by: Sergey Matyukevich # for arc
changes
Regards,
Sergey
___
linux-snps-arc mailing lis
Hi Vineet,
> > Hi all,
> >
> > This patch series removes SET_FS support for arc.
> >
> > Sergey Matyukevich (3):
> >arc: use BUILD_BUG for invalid sizes in get_user/put_user
> >arc: provide __{get,put}_kernel_nofault
> >
Hi all,
This patch series removes SET_FS support for arc.
Sergey Matyukevich (3):
arc: use BUILD_BUG for invalid sizes in get_user/put_user
arc: provide __{get,put}_kernel_nofault
arc: remove set_fs()
arch/arc/Kconfig | 1 -
arch/arc/include/asm/segment.h | 20
From: Sergey Matyukevich
Use BUILD_BUG for compile-time check of invalid sizes passed
to get_user/put_user functions.
Signed-off-by: Sergey Matyukevich
---
arch/arc/include/asm/uaccess.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arc/include/asm/uaccess.h b/arch/arc/include
From: Sergey Matyukevich
Implement the non-faulting kernel access helpers directly
instead of using uaccess routines under set_fs(KERNEL_DS).
Signed-off-by: Sergey Matyukevich
---
arch/arc/include/asm/uaccess.h | 22 ++
1 file changed, 22 insertions(+)
diff --git a/arch
From: Sergey Matyukevich
Kernel __{get,put}_kernel_nofault operations are implemented for ARC.
There are no other remaining arch/arc specific callers of set_fs().
So just remove it and all the supporting code.
Signed-off-by: Sergey Matyukevich
---
arch/arc/Kconfig | 1
37 matches
Mail list logo
