[PATCH 1/7] tracing: add ftrace_regs to function_graph_enter()

Will be used later for showing function arguments in the function graph tracer. Signed-off-by: Sven Schnelle --- arch/arm/kernel/ftrace.c | 2 +- arch/arm64/kernel/ftrace.c | 2 +- arch/csky/kernel/ftrace.c | 2 +- arch/loongarch/kernel/ftrace.c | 2 +- arch

Re: [PATCH v2 1/4] mm: Add optional close() to struct vm_special_mapping

Linus Torvalds writes: > On Mon, 2 Sept 2024 at 13:49, Andrew Morton wrote: >> >> uprobe_clear_state() is a pretty simple low-level thing. Side-effects >> seem unlikely? > > I think uprobe_clear_state() should be removed from fork.c entirely, > made 'static', and then we'd have > > area

Re: [PATCH v2 1/4] mm: Add optional close() to struct vm_special_mapping

Nathan Chancellor writes: > Hi Michael, > > On Mon, Aug 12, 2024 at 06:26:02PM +1000, Michael Ellerman wrote: >> Add an optional close() callback to struct vm_special_mapping. It will >> be used, by powerpc at least, to handle unmapping of the VDSO. >> >> Although support for unmapping the VDSO w

Re: [PATCH] bug: Use normal relative pointers in 'struct bug_entry'

to both humans and tools by > calculating them the normal way. > > Signed-off-by: Josh Poimboeuf Acked-by: Sven Schnelle # s390 > --- > arch/arm64/include/asm/asm-bug.h | 4 ++-- > arch/powerpc/include/asm/bug.h | 5 +++-- > arch/riscv/include/asm/bug.h | 4 ++-- >

Re: [PATCH v2 09/13] powerpc/ftrace: Implement CONFIG_DYNAMIC_FTRACE_WITH_ARGS

Heiko Carstens writes: > So, the in both variants s390 provides nearly identical data. The only > difference is that for FL_SAVE_REGS the program status word mask is > missing; therefore it is not possible to figure out the condition code > or if interrupts were enabled/disabled. > > Vasily, Sven

Re: ftrace hangs waiting for rcu

Hi Mark, Mark Rutland writes: > On Fri, Jan 28, 2022 at 05:08:48PM +0100, Sven Schnelle wrote: >> We noticed the PR from Paul and are currently testing the fix. So far >> it's looking good. The configuration where we have seen the hang is a >> bit unusual: >>

Re: ftrace hangs waiting for rcu

Hi Mark, Mark Rutland writes: > On arm64 I bisected this down to: > > 7a30871b6a27de1a ("rcu-tasks: Introduce ->percpu_enqueue_shift for dynamic > queue selection") > > Which was going wrong because ilog2() rounds down, and so the shift was wrong > for any nr_cpus that was not a power-of-two.

ftrace hangs waiting for rcu (was: Re: [PATCH] ftrace: Have architectures opt-in for mcount build time sorting)

Hi Mark, Mark Rutland writes: > * I intermittently see a hang when running the tests. I previously hit that > when originally trying to bisect this issue (and IIRC that bisected down to > some RCU changes, but I need to re-run that). When the tests hang I > magic-srsrq + L tells me: > >

Re: [powerpc] ftrace warning kernel/trace/ftrace.c:2068 with code-patching selftests

Mark Rutland writes: > On Thu, Jan 27, 2022 at 07:46:01AM -0500, Steven Rostedt wrote: >> On Thu, 27 Jan 2022 12:27:04 + >> Mark Rutland wrote: >> >> > Ah, so those non-ELF relocations for the mcount_loc table just mean "apply >> > the >> > KASLR offset here", which is equivalent for all e

Re: [powerpc] ftrace warning kernel/trace/ftrace.c:2068 with code-patching selftests

Mark Rutland writes: >> Isn't x86 relocatable in some configurations (e.g. for KASLR)? >> >> I can't see how the sort works for those cases, because the mcount_loc >> entries >> are absolute, and either: >> >> * The sorted entries will get overwritten by the unsorted relocation entries, >> a

[PATCH v5 5/7] kexec_elf: remove Elf_Rel macro

It wasn't used anywhere, so lets drop it. Reviewed-by: Christophe Leroy Reviewed-by: Thiago Jung Bauermann Signed-off-by: Sven Schnelle --- kernel/kexec_elf.c | 4 1 file changed, 4 deletions(-) diff --git a/kernel/kexec_elf.c b/kernel/kexec_elf.c index 87935bd5e2ba..6c806ce96ac1 1

[PATCH v5 7/7] kexec_elf: support 32 bit ELF files

The powerpc version only supported 64 bit. Add some code to switch decoding of fields during runtime so we can kexec a 32 bit kernel from a 64 bit kernel and vice versa. Signed-off-by: Sven Schnelle Reviewed-by: Thiago Jung Bauermann --- kernel/kexec_elf.c | 57

[PATCH v5 4/7] kexec_elf: remove PURGATORY_STACK_SIZE

It's not used anywhere so just drop it. Signed-off-by: Sven Schnelle Reviewed-by: Thiago Jung Bauermann --- kernel/kexec_elf.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/kernel/kexec_elf.c b/kernel/kexec_elf.c index 137037603117..87935bd5e2ba 100644 --- a/kernel/kexec_elf.c

[PATCH v5 3/7] kexec_elf: remove parsing of section headers

We're not using them, so we can drop the parsing. Signed-off-by: Sven Schnelle Reviewed-by: Thiago Jung Bauermann --- include/linux/kexec.h | 1 - kernel/kexec_elf.c| 137 -- 2 files changed, 138 deletions(-) diff --git a/include/linux/kexe

[PATCH v5 1/7] kexec: add KEXEC_ELF

Right now powerpc provides an implementation to read elf files with the kexec_file_load() syscall. Make that available as a public kexec interface so it can be re-used on other architectures. Signed-off-by: Sven Schnelle --- arch/Kconfig | 3 + arch/powerpc

[PATCH v5 6/7] kexec_elf: remove unused variable in kexec_elf_load()

base was never assigned, so we can remove it. Reviewed-by: Christophe Leroy Reviewed-by: Thiago Jung Bauermann Signed-off-by: Sven Schnelle --- kernel/kexec_elf.c | 7 ++- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/kernel/kexec_elf.c b/kernel/kexec_elf.c index

[PATCH v5 2/7] kexec_elf: change order of elf_*_to_cpu() functions

Change the order to have a 64/32/16 order, no functional change. Signed-off-by: Sven Schnelle Reviewed-by: Thiago Jung Bauermann --- kernel/kexec_elf.c | 12 ++-- 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/kernel/kexec_elf.c b/kernel/kexec_elf.c index 26c6310167a0

[PATCH v5 0/7] kexec: add generic support for elf kernel images

smaller pieces - rebase onto powerpc/next - remove unused variable in kexec_elf_load() Changes to RFC version: - remove unused Elf_Rel macro - remove section header parsing - remove PURGATORY_STACK_SIZE - change order of elf_*_to_cpu() functions - remove elf_addr_to_cpu macro Sven Schnelle

Re: [PATCH 1/2] arch: mark syscall number 435 reserved for clone3

Hi, [Adding Helge to CC list] On Tue, Jul 16, 2019 at 03:06:33PM +0200, Christian Brauner wrote: > On Mon, Jul 15, 2019 at 03:56:04PM +0200, Christian Borntraeger wrote: > > I think Vasily already has a clone3 patch for s390x with 435. > > A quick follow-up on this. Helge and Michael have asked

[PATCH v4 1/7] kexec: add KEXEC_ELF

Right now powerpc provides an implementation to read elf files with the kexec_file() syscall. Make that available as a public kexec interface so it can be re-used on other architectures. Signed-off-by: Sven Schnelle --- arch/Kconfig | 3 + arch/powerpc/Kconfig

[PATCH v4 0/7] kexec: add generic support for elf kernel images

header parsing - remove PURGATORY_STACK_SIZE - change order of elf_*_to_cpu() functions - remove elf_addr_to_cpu macro Sven Schnelle (7): kexec: add KEXEC_ELF kexec_elf: change order of elf_*_to_cpu() functions kexec_elf: remove parsing of section headers kexec_elf: remove

[PATCH v4 3/7] kexec_elf: remove parsing of section headers

We're not using them, so we can drop the parsing. Signed-off-by: Sven Schnelle --- include/linux/kexec.h | 1 - kernel/kexec_elf.c| 137 -- 2 files changed, 138 deletions(-) diff --git a/include/linux/kexec.h b/include/linux/kexec.h

[PATCH v4 2/7] kexec_elf: change order of elf_*_to_cpu() functions

Change the order to have a 64/32/16 order, no functional change. Signed-off-by: Sven Schnelle --- kernel/kexec_elf.c | 12 ++-- 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/kernel/kexec_elf.c b/kernel/kexec_elf.c index 6e9f52171ede..76e7df64d715 100644 --- a/kernel

[PATCH v4 5/7] kexec_elf: remove Elf_Rel macro

It wasn't used anywhere, so lets drop it. Reviewed-by: Christophe Leroy Signed-off-by: Sven Schnelle --- kernel/kexec_elf.c | 4 1 file changed, 4 deletions(-) diff --git a/kernel/kexec_elf.c b/kernel/kexec_elf.c index 70d31b8feeae..e346659af324 100644 --- a/kernel/kexec_elf.c

[PATCH v4 6/7] kexec_elf: remove unused variable in kexec_elf_load()

base was never assigned, so we can remove it. Reviewed-by: Christophe Leroy Signed-off-by: Sven Schnelle --- kernel/kexec_elf.c | 7 ++- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/kernel/kexec_elf.c b/kernel/kexec_elf.c index e346659af324..9421eebbacf0 100644 --- a

[PATCH v4 4/7] kexec_elf: remove PURGATORY_STACK_SIZE

It's not used anywhere so just drop it. Signed-off-by: Sven Schnelle --- kernel/kexec_elf.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/kernel/kexec_elf.c b/kernel/kexec_elf.c index effe9dc0b055..70d31b8feeae 100644 --- a/kernel/kexec_elf.c +++ b/kernel/kexec_elf.c @@ -8,8

[PATCH v4 7/7] kexec_elf: support 32 bit ELF files

The powerpc version only supported 64 bit. Add some code to switch decoding of fields during runtime so we can kexec a 32 bit kernel from a 64 bit kernel and vice versa. Signed-off-by: Sven Schnelle --- kernel/kexec_elf.c | 57 ++ 1 file changed, 42

Re: [PATCH v3 5/7] kexec_elf: remove elf_addr_to_cpu macro

Hi Michael, On Thu, Jul 11, 2019 at 09:08:51PM +1000, Michael Ellerman wrote: > Sven Schnelle writes: > > On Wed, Jul 10, 2019 at 05:09:29PM +0200, Christophe Leroy wrote: > >> Le 10/07/2019 à 16:29, Sven Schnelle a écrit : > >> > It had only one definition, so

Re: [PATCH v3 5/7] kexec_elf: remove elf_addr_to_cpu macro

Hi Christophe, On Wed, Jul 10, 2019 at 05:09:29PM +0200, Christophe Leroy wrote: > > > Le 10/07/2019 à 16:29, Sven Schnelle a écrit : > > It had only one definition, so just use the function directly. > > It had only one definition because it was for ppc64 only. > Bu

[PATCH v3 3/7] kexec_elf: remove parsing of section headers

We're not using them, so we can drop the parsing. Signed-off-by: Sven Schnelle --- include/linux/kexec.h | 1 - kernel/kexec_elf.c| 137 -- 2 files changed, 138 deletions(-) diff --git a/include/linux/kexec.h b/include/linux/kexec.h

[PATCH v3 7/7] kexec_elf: remove unused variable in kexec_elf_load()

base was never unsigned, so we can remove it. Signed-off-by: Sven Schnelle --- kernel/kexec_elf.c | 7 ++- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/kernel/kexec_elf.c b/kernel/kexec_elf.c index b7e47ddd7cad..a56ec5481e71 100644 --- a/kernel/kexec_elf.c +++ b/kernel

[PATCH v3 5/7] kexec_elf: remove elf_addr_to_cpu macro

It had only one definition, so just use the function directly. Signed-off-by: Sven Schnelle --- kernel/kexec_elf.c | 20 +--- 1 file changed, 9 insertions(+), 11 deletions(-) diff --git a/kernel/kexec_elf.c b/kernel/kexec_elf.c index 70d31b8feeae..99e6d63b5dfc 100644 --- a

[PATCH v3 4/7] kexec_elf: remove PURGATORY_STACK_SIZE

It's not used anywhere so just drop it. Signed-off-by: Sven Schnelle --- kernel/kexec_elf.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/kernel/kexec_elf.c b/kernel/kexec_elf.c index effe9dc0b055..70d31b8feeae 100644 --- a/kernel/kexec_elf.c +++ b/kernel/kexec_elf.c @@ -8,8

[PATCH v3 2/7] kexec_elf: change order of elf_*_to_cpu() functions

Change the order to have a 64/32/16 order, no functional change. Signed-off-by: Sven Schnelle --- kernel/kexec_elf.c | 12 ++-- 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/kernel/kexec_elf.c b/kernel/kexec_elf.c index 6e9f52171ede..76e7df64d715 100644 --- a/kernel

[PATCH v3 1/7] kexec: add KEXEC_ELF

Right now powerpc provides an implementation to read elf files with the kexec_file() syscall. Make that available as a public kexec interface so it can be re-used on other architectures. Signed-off-by: Sven Schnelle --- arch/Kconfig | 3 + arch/powerpc/Kconfig

[PATCH v3 6/7] kexec_elf: remove Elf_Rel macro

It wasn't used anywhere, so lets drop it. Signed-off-by: Sven Schnelle --- kernel/kexec_elf.c | 4 1 file changed, 4 deletions(-) diff --git a/kernel/kexec_elf.c b/kernel/kexec_elf.c index 99e6d63b5dfc..b7e47ddd7cad 100644 --- a/kernel/kexec_elf.c +++ b/kernel/kexec_elf.c @@ -8,10

[PATCH v3 0/7] kexec: add generic support for elf kernel images

Elf_Rel macro - remove section header parsing - remove PURGATORY_STACK_SIZE - change order of elf_*_to_cpu() functions - remove elf_addr_to_cpu macro Sven Schnelle (7): kexec: add KEXEC_ELF kexec_elf: change order of elf_*_to_cpu() functions kexec_elf: remove parsing of section headers

Re: [PATCH v2 1/7] kexec: add KEXEC_ELF

Hi Christophe, On Wed, Jul 10, 2019 at 01:19:13PM +, Christophe Leroy wrote: > Hi Sven, > > On 07/09/2019 07:43 PM, Sven Schnelle wrote: > > Right now powerpc provides an implementation to read elf files > > with the kexec_file() syscall. Make that available as a publi

[PATCH v2 3/7] kexec_elf: remove parsing of section headers

We're not using them, so we can drop the parsing. Signed-off-by: Sven Schnelle --- include/linux/kexec.h | 1 - kernel/kexec_elf.c| 137 -- 2 files changed, 138 deletions(-) diff --git a/include/linux/kexec.h b/include/linux/kexec.h

[PATCH v2 6/7] kexec_elf: remove Elf_Rel macro

It wasn't used anywhere, so lets drop it. Signed-off-by: Sven Schnelle --- kernel/kexec_elf.c | 4 1 file changed, 4 deletions(-) diff --git a/kernel/kexec_elf.c b/kernel/kexec_elf.c index 99e6d63b5dfc..b7e47ddd7cad 100644 --- a/kernel/kexec_elf.c +++ b/kernel/kexec_elf.c @@ -8,10

[PATCH v2 2/7] kexec_elf: change order of elf_*_to_cpu() functions

Change the order to have a 64/32/16 order, no functional change. Signed-off-by: Sven Schnelle --- kernel/kexec_elf.c | 12 ++-- 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/kernel/kexec_elf.c b/kernel/kexec_elf.c index 6e9f52171ede..76e7df64d715 100644 --- a/kernel

[PATCH v2 1/7] kexec: add KEXEC_ELF

Right now powerpc provides an implementation to read elf files with the kexec_file() syscall. Make that available as a public kexec interface so it can be re-used on other architectures. Signed-off-by: Sven Schnelle --- arch/Kconfig | 3 + arch/powerpc/Kconfig

[PATCH v2 4/7] kexec_elf: remove PURGATORY_STACK_SIZE

It's not used anywhere so just drop it. Signed-off-by: Sven Schnelle --- kernel/kexec_elf.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/kernel/kexec_elf.c b/kernel/kexec_elf.c index effe9dc0b055..70d31b8feeae 100644 --- a/kernel/kexec_elf.c +++ b/kernel/kexec_elf.c @@ -8,8

[PATCH v2 5/7] kexec_elf: remove elf_addr_to_cpu macro

It had only one definition, so just use the function directly. Signed-off-by: Sven Schnelle --- kernel/kexec_elf.c | 20 +--- 1 file changed, 9 insertions(+), 11 deletions(-) diff --git a/kernel/kexec_elf.c b/kernel/kexec_elf.c index 70d31b8feeae..99e6d63b5dfc 100644 --- a

[PATCH v2 0/7] kexec: add generic support for elf kernel images

into smaller pieces - rebase onto powerpc/next - remove unused variable in kexec_elf_load() Changes to RFC version: - remove unused Elf_Rel macro - remove section header parsing - remove PURGATORY_STACK_SIZE - change order of elf_*_to_cpu() functions - remove elf_addr_to_cpu macro Sven Schnel

[PATCH v2 7/7] kexec_elf: remove unused variable in kexec_elf_load()

base was never unsigned, so we can remove it. Signed-off-by: Sven Schnelle --- kernel/kexec_elf.c | 7 ++- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/kernel/kexec_elf.c b/kernel/kexec_elf.c index b7e47ddd7cad..a56ec5481e71 100644 --- a/kernel/kexec_elf.c +++ b/kernel

Re: [PATCH using git format-patch -C] kexec: add generic support for elf kernel images

Hi Christophe, On Mon, Jul 08, 2019 at 12:40:52PM +0200, Christophe Leroy wrote: > > From: Sven Schnelle > > Please describe you patch. > > All the changes you are doing to the ppc64 version in order to make it > generic should be described. > > Those changes are

[PATCH] kexec: add generic support for elf kernel images

Signed-off-by: Sven Schnelle --- arch/Kconfig | 3 + arch/powerpc/Kconfig | 1 + arch/powerpc/kernel/kexec_elf_64.c | 547 + include/linux/kexec.h | 35 ++ kernel/Makefile| 1 + kernel

Re: [PATCH RFC] generic ELF support for kexec

Hi Philipp, On Mon, Jul 01, 2019 at 02:31:20PM +0200, Philipp Rudo wrote: > Sven Schnelle wrote: > > > I'm attaching the patch to this Mail. What do you think about that change? > > s390 also uses ELF files, and (maybe?) could also switch to this > > impleme

Re: [PATCH RFC] generic ELF support for kexec

Hi Michael, On Fri, Jun 28, 2019 at 12:04:11PM +1000, Michael Ellerman wrote: > Sven Schnelle writes: > https://github.com/linuxppc/wiki/wiki/Booting-with-Qemu > > But I'm not sure where you get a version of kexec that uses kexec_file(). kexec-tools HEAD supports it, so tha

[PATCH RFC] generic ELF support for kexec

out. Regards, Sven [PATCH] kexec: add generic support for elf kernel images Signed-off-by: Sven Schnelle --- arch/Kconfig | 3 + arch/powerpc/Kconfig | 1 + arch/powerpc/kernel/kexec_elf_64.c | 547 +-- include/linux/kexec.