RE instead, since
kexec_file_load also needs that code compiled in.
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/Kconfig | 2 +-
arch/powerpc/include/asm/debug.h | 2 +-
arch/powerpc/include/asm/kexec.h | 6 +++---
arch/powerpc/include/asm
This shows how kernel code can use the kexec buffer passing mechanism
to pass information to the next kernel.
This patch is not intended to be committed.
[a...@linux-foundation.org: coding-style fixes]
Signed-off-by: Thiago Jung Bauermann
Signed-off-by: Andrew Morton
---
include/linux/ima.h
that the purgatory can add those dot symbols.
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/Makefile | 4 +
arch/powerpc/boot/string.S| 67 ++--
arch/powerpc/purgatory/.gitignore | 2 +
arch/powerpc/purgatory/Makefile
nated initializers. Therefore,
there is no behavior change with this patch and all segments except the
purgatory are checksummed.
Signed-off-by: Thiago Jung Bauermann
---
include/linux/kexec.h | 23 ++-
kernel/kexec_file.c | 15 +++
2 files changed, 21 insertions(+
arch_kexec_walk_mem and arch_kexec_apply_relocations_add are used by
generic kexec code, while setup_purgatory is powerpc-specific and sets
runtime variables needed by the powerpc purgatory implementation.
Signed-off-by: Josh Sklar
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/Kconfig
The buffer hand-over mechanism allows the currently running kernel to pass
data to kernel that will be kexec'd via a kexec segment. The second kernel
can check whether the previous kernel sent data and retrieve it.
This is the architecture-specific part.
Signed-off-by: Thiago Jung Baue
hiago Jung Bauermann
---
include/linux/kexec.h | 31 +++
kernel/kexec_file.c | 68 +++
2 files changed, 99 insertions(+)
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index d419d0e51fe5..16561e96a6d7 100644
--- a/in
Enable CONFIG_KEXEC_FILE in powernv_defconfig, ppc64_defconfig and
pseries_defconfig.
It depends on CONFIG_CRYPTO_SHA256=y, so add that as well.
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/configs/powernv_defconfig | 2 ++
arch/powerpc/configs/ppc64_defconfig | 2 ++
arch/powerpc
ating the ELF structs. These functions will be used in the next
patch in the series.
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/include/asm/elf_util.h | 18 ++
arch/powerpc/kernel/Makefile| 2 +-
arch/powerpc/kernel/elf_util.c | 476 ++
kexec_file_load needs to set up the device tree that will be used
by the next kernel and check whether it provides a console
that can be used by the purgatory.
[a...@linux-foundation.org: coding-style fixes]
Signed-off-by: Thiago Jung Bauermann
Signed-off-by: Andrew Morton
---
arch/powerpc
s NULL in kexec_update_segment.
- Patch "IMA: Demonstration code for kexec buffer passing."
- Avoid registering reboot notifier again if kexec_file_load is called
more than once.
Thiago Jung Bauermann (5):
kexec_file: Add buffer hand-over support for the next kernel
powerpc: ke
et at its final location by adding an addr_base argument
to specify the address at which the section will be loaded, and rela,
loc_base and syms_base to point to the sections' contents.
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/include/asm/elf_util.h | 6 ++--
arch/powerpc/kernel/
Mohan Kumar M (mo...@in.ibm.com)
+ * Copyright (C) 2016 IBM Corporation
+ *
+ * Based on kexec-tools' kexec-elf-exec.c and kexec-elf-ppc64.c.
+ * Heavily modified for the kernel by
+ * Thiago Jung Bauermann .
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it
kexec_locate_mem_hole will be used by the PowerPC kexec_file_load
implementation to find free memory for the purgatory stack.
Signed-off-by: Thiago Jung Bauermann
Acked-by: Dave Young
---
include/linux/kexec.h | 1 +
kernel/kexec_file.c | 25 -
2 files changed, 21
kexec_update_segment allows a given segment in kexec_image to have
its contents updated. This is useful if the current kernel wants to
send information to the next kernel that is up-to-date at the time of
reboot.
Signed-off-by: Thiago Jung Bauermann
---
include/linux/kexec.h | 2 ++
kernel
alled from
elf64_apply_relocate_add.
local_entry_offset and squash_toc_save_inst were only used by
apply_rellocate_add, so they were moved to elf_util_64.c as well.
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/include/asm/elf_util.h | 70
arch/powerpc/include/asm/module.h
fixes]
Signed-off-by: Thiago Jung Bauermann
Signed-off-by: Andrew Morton
---
arch/powerpc/include/asm/elf_util.h | 2 +
arch/powerpc/kernel/elf_util_64.c | 100 +---
arch/powerpc/kernel/module_64.c | 6 ++-
3 files changed, 99 insertions(+), 9 deletions
C64_ELF_ABI_v2 macro.
Changes for v2:
- All patches: forgot to add Signed-off-by lines in v1, so added them now.
- Patch "kexec_file: Generalize kexec_add_buffer.": broke in two, one
adding arch_kexec_walk_mem and the other adding kexec_locate_mem_hole.
- Patch "powerpc: Implement
The buffer hand-over mechanism allows the currently running kernel to pass
data to kernel that will be kexec'd via a kexec segment. The second kernel
can check whether the previous kernel sent data and retrieve it.
This is the architecture-specific part.
Signed-off-by: Thiago Jung Baue
ce the "ima: carry the
> measurement list across kexec" series has stabilised, I should drop the
> demo patch and also grab those? If so, pelase start cc'ing me.
I'm not sure how Mimi is planning to upstream that series.
--
[]'s
Thiago Jung Bauermann
IBM Linux Technology Center
This shows how kernel code can use the kexec buffer passing mechanism
to pass information to the next kernel.
This patch is not intended to be committed.
Signed-off-by: Thiago Jung Bauermann
---
include/linux/ima.h | 11 +
kernel/kexec_file.c | 4
hiago Jung Bauermann
---
include/linux/kexec.h | 31 +++
kernel/kexec_file.c | 68 +++
2 files changed, 99 insertions(+)
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index d419d0e51fe5..16561e96a6d7 100644
--- a/in
nated initializers. Therefore,
there is no behavior change with this patch and all segments except the
purgatory are checksummed.
Signed-off-by: Thiago Jung Bauermann
---
include/linux/kexec.h | 23 ++-
kernel/kexec_file.c | 15 +++
2 files changed, 21 insertions(+
kexec_update_segment allows a given segment in kexec_image to have
its contents updated. This is useful if the current kernel wants to
send information to the next kernel that is up-to-date at the time of
reboot.
Signed-off-by: Thiago Jung Bauermann
---
include/linux/kexec.h | 2 ++
kernel
heck if kexec_image is NULL in kexec_update_segment.
- Patch "IMA: Demonstration code for kexec buffer passing."
- Avoid registering reboot notifier again if kexec_file_load is called
more than once.
Thiago Jung Bauermann (5):
kexec_file: Add buffer hand-over support for the next kernel
to free a NULL pointer.
Signed-off-by: Thiago Jung Bauermann
---
kernel/kexec_file.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c
index 503bc2d348e5..037c321c5618 100644
--- a/kernel/kexec_file.c
+++ b/kernel/kexec_file.c
@@ -887,7 +887,10 @@ i
mitation, cc'ing him
>
> I don't think it's ever worked so I wouldn't worry too much about
> supporting it. Fixing kexec-into-zImage and fixing the 32bit wrapper
> on 64bit BE kernel problem has been on my TODO list for a while, but
> it's not a priority.
Ok, thanks for your input.
--
[]'s
Thiago Jung Bauermann
IBM Linux Technology Center
Am Dienstag, 16 August 2016, 16:52:54 schrieb Balbir Singh:
> On 16/08/16 09:25, Thiago Jung Bauermann wrote:
> > Am Montag, 15 August 2016, 17:46:34 schrieb Balbir Singh:
> >> On Thu, Aug 11, 2016 at 08:08:09PM -0300, Thiago Jung Bauermann wrote:
> >>> +/**
>
Am Montag, 22 August 2016, 15:22:00 schrieb Dave Young:
> On 08/22/16 at 12:38am, Thiago Jung Bauermann wrote:
> > Am Montag, 22 August 2016, 11:21:35 schrieb Dave Young:
> > > On 08/13/16 at 12:18am, Thiago Jung Bauermann wrote:
> > > > diff --git a/arch/pow
Am Montag, 22 August 2016, 11:36:43 schrieb Dave Young:
> On 08/22/16 at 12:25am, Thiago Jung Bauermann wrote:
> > Am Montag, 22 August 2016, 11:17:45 schrieb Dave Young:
> > > On 08/18/16 at 06:09pm, Thiago Jung Bauermann wrote:
> > > > Am Donnerstag, 18 August 201
Am Montag, 22 August 2016, 11:36:43 schrieb Dave Young:
> On 08/22/16 at 12:25am, Thiago Jung Bauermann wrote:
> > Am Montag, 22 August 2016, 11:17:45 schrieb Dave Young:
> > > On 08/18/16 at 06:09pm, Thiago Jung Bauermann wrote:
> > > > Hello Dave,
> >
Am Montag, 22 August 2016, 11:21:35 schrieb Dave Young:
> On 08/13/16 at 12:18am, Thiago Jung Bauermann wrote:
> > diff --git a/arch/powerpc/kernel/machine_kexec_64.c
> > b/arch/powerpc/kernel/machine_kexec_64.c index
> > a484a6346146..190c652e49b7 100644
> >
Am Montag, 22 August 2016, 11:17:45 schrieb Dave Young:
> On 08/18/16 at 06:09pm, Thiago Jung Bauermann wrote:
> > Hello Dave,
> >
> > Thanks for your review!
> >
> > [ Trimming down Cc: list a little to try to clear the "too many
> > recipients"
existing casts to char * in the code.
Signed-off-by: Thiago Jung Bauermann
Acked-by: Dave Young
Acked-by: Balbir Singh
---
arch/x86/kernel/crash.c | 37
arch/x86/kernel/kexec-bzimage64.c | 48 +++--
include/linux/kexec.h | 8 +---
kernel
dd_buffer.": broke in two, one
adding arch_kexec_walk_mem and the other adding kexec_locate_mem_hole.
- Patch "powerpc: Implement kexec_file_load.":
- Moved relocation changes and the arch_kexec_walk_mem implementation
to the next patch in the series.
- Removed pr_fmt fro
Allow architectures to specify a different memory walking function for
kexec_add_buffer. x86 uses iomem to track reserved memory ranges, but
PowerPC uses the memblock subsystem.
Signed-off-by: Thiago Jung Bauermann
Acked-by: Dave Young
Acked-by: Balbir Singh
---
include/linux/kexec.h | 29
before relocating the module, while the latter does that
adjustment during relocation of the purgatory.
Also, add a check_symbols argument so that the kexec code can be stricter
about undefined symbols.
Finally, add relocation types used by the purgatory.
Signed-off-by: Thiago Jung Bauermann
alled from
elf64_apply_relocate_add.
local_entry_offset and squash_toc_save_inst were only used by
apply_rellocate_add, so they were moved to elf_util_64.c as well.
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/include/asm/elf_util.h | 70
arch/powerpc/include/asm/module.h
ating the ELF structs. These functions will be used in the next
patch in the series.
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/include/asm/elf_util.h | 18 ++
arch/powerpc/kernel/Makefile| 2 +-
arch/powerpc/kernel/elf_util.c | 476 ++
that the purgatory can add those dot symbols.
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/Makefile | 4 +
arch/powerpc/boot/string.S| 67 ++--
arch/powerpc/purgatory/.gitignore | 2 +
arch/powerpc/purgatory/Makefile
Enable CONFIG_KEXEC_FILE in powernv_defconfig, ppc64_defconfig and
pseries_defconfig.
It depends on CONFIG_CRYPTO_SHA256=y, so add that as well.
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/configs/powernv_defconfig | 2 ++
arch/powerpc/configs/ppc64_defconfig | 2 ++
arch/powerpc
kexec_file_load needs to set up the device tree that will be used
by the next kernel and check whether it provides a console
that can be used by the purgatory.
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/include/asm/kexec.h | 3 +
arch/powerpc/kernel/machine_kexec_64.c | 220
Mohan Kumar M (mo...@in.ibm.com)
+ * Copyright (C) 2016 IBM Corporation
+ *
+ * Based on kexec-tools' kexec-elf-exec.c and kexec-elf-ppc64.c.
+ * Heavily modified for the kernel by
+ * Thiago Jung Bauermann .
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it
arch_kexec_walk_mem and arch_kexec_apply_relocations_add are used by
generic kexec code, while setup_purgatory is powerpc-specific and sets
runtime variables needed by the powerpc purgatory implementation.
Signed-off-by: Josh Sklar
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/Kconfig
et at its final location by adding an addr_base argument
to specify the address at which the section will be loaded, and rela,
loc_base and syms_base to point to the sections' contents.
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/include/asm/elf_util.h | 6 ++--
arch/powerpc/kernel/
kexec_locate_mem_hole will be used by the PowerPC kexec_file_load
implementation to find free memory for the purgatory stack.
Signed-off-by: Thiago Jung Bauermann
Acked-by: Dave Young
---
include/linux/kexec.h | 1 +
kernel/kexec_file.c | 25 -
2 files changed, 21
Hello Dave,
Thanks for your review!
[ Trimming down Cc: list a little to try to clear the "too many recipients"
mailing list restriction. ]
Am Donnerstag, 18 August 2016, 17:03:30 schrieb Dave Young:
> On 08/13/16 at 12:18am, Thiago Jung Bauermann wrote:
> > Adds c
Hello Dave,
Am Mittwoch, 17 August 2016, 10:52:26 schrieb Dave Young:
> On 08/13/16 at 12:18am, Thiago Jung Bauermann wrote:
> > This series applies on top of v5 of the "kexec_file_load implementation
> > for PowerPC" patch series (which applies on top of
Am Dienstag, 16 August 2016, 16:15:55 schrieb Balbir Singh:
> On 16/08/16 00:49, Thiago Jung Bauermann wrote:
> > Am Montag, 15 August 2016, 17:30:49 schrieb Balbir Singh:
> >> On Thu, Aug 11, 2016 at 08:08:07PM -0300, Thiago Jung Bauermann wrote:
> >>> Adapt a
Hello Andrew,
Thank you for your review!
Am Montag, 15 August 2016, 15:27:56 schrieb Andrew Morton:
> On Sat, 13 Aug 2016 00:18:23 -0300 Thiago Jung Bauermann
> wrote:
> > +/**
> > + * kexec_update_segment - update the contents of a kimage segment
> > + * @buffer:
fdset"
argument points to the following struct buffer:
struct kexec_fdset {
int nr_fds;
struct kexec_file_fd fds[0];
}
Signed-off-by: AKASHI Takahiro
Signed-off-by: Thiago Jung Bauermann
---
include/linux/fs.h | 1 +
include/lin
Am Montag, 15 August 2016, 17:46:34 schrieb Balbir Singh:
> On Thu, Aug 11, 2016 at 08:08:09PM -0300, Thiago Jung Bauermann wrote:
> > +/**
> > + * elf64_apply_relocate_add - apply 64 bit RELA relocations
> > + * @elf_info: Support information for the ELF bi
Am Montag, 15 August 2016, 17:30:49 schrieb Balbir Singh:
> On Thu, Aug 11, 2016 at 08:08:07PM -0300, Thiago Jung Bauermann wrote:
> > Adapt all callers to the new function prototype.
>
> Could you please expand on this?
Is the following better?
Adapt all callers to set up a ke
Make kimage_load_normal_segment and kexec_update_segment share code
which they currently duplicate.
Signed-off-by: Thiago Jung Bauermann
---
kernel/kexec_core.c | 159 +++-
1 file changed, 95 insertions(+), 64 deletions(-)
diff --git a/kernel
This patch is not intended to be committed.
It shows how kernel code can use the kexec buffer passing mechanism
to pass information to the next kernel.
Signed-off-by: Thiago Jung Bauermann
---
include/linux/ima.h | 11 +
kernel/kexec_file.c | 4
kexec_update_segment allows a given segment in kexec_image to have
its contents updated. This is useful if the current kernel wants to
send information to the next kernel that is up-to-date at the time of
reboot.
Signed-off-by: Thiago Jung Bauermann
---
include/linux/kexec.h | 2 ++
kernel
hiago Jung Bauermann
---
include/linux/kexec.h | 29 ++
kernel/kexec_file.c | 68 +++
2 files changed, 97 insertions(+)
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index ceccc5856aab..4559a1a01b0a 100644
--- a/in
The buffer hand-over mechanism allows the currently running kernel to pass
data to kernel that will be kexec'd via a kexec segment. The second kernel
can check whether the previous kernel sent data and retrieve it.
This is the architecture-specific part.
Signed-off-by: Thiago Jung Baue
purgatory checksum verification to fail
when the machine is rebooted.
As a bonus, we don't need to special-case the purgatory segment anymore
to avoid checksumming it.
Adjust call sites for the new argument.
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/kernel/kexec_elf_64.c
oved unnecessary "#include " in kexec_file.c.
- Round up memsz argument to PAGE_SIZE.
- Check if kexec_image is NULL in kexec_update_segment.
- Patch "IMA: Demonstration code for kexec buffer passing."
- Avoid registering reboot notifier again if kexec_file_load is called
Hello Balbir,
Thank you for the review!
Am Freitag, 12 August 2016, 18:17:39 schrieb Balbir Singh:
> On Thu, Aug 11, 2016 at 08:03:58PM -0300, Thiago Jung Bauermann wrote:
> > diff --git a/include/linux/fs.h b/include/linux/fs.h
> > index 3523bf62f328..847d9c31f428 100644
> >
Hello Sam,
Thanks for the quick response.
Am Freitag, 12 August 2016, 10:45:00 schrieb Samuel Mendoza-Jonas:
> On Thu, 2016-08-11 at 20:08 -0300, Thiago Jung Bauermann wrote:
> > @@ -908,4 +909,245 @@ bool find_debug_console(const void *fdt, int
> > chosen_nod
Allow architectures to specify a different memory walking function for
kexec_add_buffer. x86 uses iomem to track reserved memory ranges, but
PowerPC uses the memblock subsystem.
Signed-off-by: Thiago Jung Bauermann
Acked-by: Dave Young
---
include/linux/kexec.h | 26
before relocating the module, while the latter does that
adjustment during relocation of the purgatory.
Also, add a check_symbols argument so that the kexec code can be stricter
about undefined symbols.
Finally, add relocation types used by the purgatory.
Signed-off-by: Thiago Jung Bauermann
alled from
elf64_apply_relocate_add.
local_entry_offset and squash_toc_save_inst were only used by
apply_rellocate_add, so they were moved to elf_util_64.c as well.
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/include/asm/elf_util.h | 70
arch/powerpc/include/asm/module.h
kexec_locate_mem_hole will be used by the PowerPC kexec_file_load
implementation to find free memory for the purgatory stack.
Signed-off-by: Thiago Jung Bauermann
Acked-by: Dave Young
---
include/linux/kexec.h | 1 +
kernel/kexec_file.c | 25 -
2 files changed, 21
arch_kexec_walk_mem and arch_kexec_apply_relocations_add are used by
generic kexec code, while setup_purgatory is powerpc-specific and sets
runtime variables needed by the powerpc purgatory implementation.
Signed-off-by: Josh Sklar
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/Kconfig
et at its final location by adding an addr_base argument
to specify the address at which the section will be loaded, and rela,
loc_base and syms_base to point to the sections' contents.
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/include/asm/elf_util.h | 6 ++--
arch/powerpc/kernel/
kexec_file_load needs to set up the device tree that will be used
by the next kernel and check whether it provides a console
that can be used by the purgatory.
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/include/asm/kexec.h | 3 +
arch/powerpc/kernel/machine_kexec_64.c | 222
Adapt all callers to the new function prototype.
In addition, change the type of kexec_buf.buffer from char * to void *.
There is no particular reason for it to be a char *, and the change
allows us to get rid of 3 existing casts to char * in the code.
Signed-off-by: Thiago Jung Bauermann
Acked
Enable CONFIG_KEXEC_FILE in powernv_defconfig, ppc64_defconfig and
pseries_defconfig.
It depends on CONFIG_CRYPTO_SHA256=y, so add that as well.
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/configs/powernv_defconfig | 2 ++
arch/powerpc/configs/ppc64_defconfig | 2 ++
arch/powerpc
Ellerman
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/include/asm/kexec.h | 1 +
arch/powerpc/kernel/kexec_elf_64.c | 9 ++
arch/powerpc/kernel/machine_kexec_64.c | 242 +
3 files changed, 252 insertions(+)
diff --git a/arch/powerpc/include
Mohan Kumar M (mo...@in.ibm.com)
+ * Copyright (C) 2016 IBM Corporation
+ *
+ * Based on kexec-tools' kexec-elf-exec.c and kexec-elf-ppc64.c.
+ * Heavily modified for the kernel by
+ * Thiago Jung Bauermann .
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it
A-256 implementation.
Also, some formatting warnings found by checkpatch.pl were fixed.
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/Makefile | 4 +
arch/powerpc/purgatory/.gitignore | 2 +
arch/powerpc/purgatory/Makefile | 36 +++
arch/powerpc/purg
;kexec_file: Generalize kexec_add_buffer.": broke in two, one
adding arch_kexec_walk_mem and the other adding kexec_locate_mem_hole.
- Patch "powerpc: Implement kexec_file_load.":
- Moved relocation changes and the arch_kexec_walk_mem implementation
to the next patch in the
ating the ELF structs. These functions will be used in the next
patch in the series.
Signed-off-by: Thiago Jung Bauermann
---
arch/powerpc/include/asm/elf_util.h | 19 ++
arch/powerpc/kernel/Makefile| 2 +-
arch/powerpc/kernel/elf_util.c | 476 ++
From: AKASHI Takahiro
Device tree blob must be passed to a second kernel on DTB-capable
archs, like powerpc and arm64, but the current kernel interface
lacks this support.
This patch adds dtb buffer information to struct kimage.
When users don't specify dtb explicitly and the one used for the cu
uot;binary
compatibility."
[1] http://lists.infradead.org/pipermail/kexec/2016-June/016276.html
AKASHI Takahiro (1):
kexec: add dtb info to struct kimage
Thiago Jung Bauermann (1):
kexec: extend kexec_file_load system call
include/linux/fs.h | 1 +
include/linux/kexec.h |
ct kexec_file_fd fds[0];
}
Signed-off-by: AKASHI Takahiro
Signed-off-by: Thiago Jung Bauermann
---
include/linux/fs.h | 1 +
include/linux/kexec.h | 7 ++--
include/linux/syscalls.h | 4 ++-
include/uapi/linux/kexec.h | 22
kernel/kexe
Am Mittwoch, 10 August 2016, 13:41:08 schrieb Michael Ellerman:
> Thiago Jung Bauermann writes:
> > Am Dienstag, 09 August 2016, 09:01:13 schrieb Mimi Zohar:
> >> On Tue, 2016-08-09 at 20:59 +1000, Michael Ellerman wrote:
> >> > Mimi Zohar writes:
> >> &g
ked;
> > > +
> >
> > Am I understanding it correctly that this structure is passed between
> > kernels?
> Yes, the header prefixes the measurement list, which is being passed on
> the same computer to the next kernel. Could the architecture (eg.
> LE/BE) change
Hi,
Am Dienstag, 26 Juli 2016, 21:24:29 schrieb Thiago Jung Bauermann:
> Notes:
> This is a new version of the last patch in this series which adds
> a function where each architecture can verify if the DTB is safe
> to load:
>
> int __weak arch_kexec_
Hello,
Am Donnerstag, 07 Juli 2016, 13:23:26 schrieb Thiago Jung Bauermann:
> Note: We are currently discussing whether we need a new syscall so that
> userspace can provide a custom device tree for the new kernel. Even if
> that ends up being the way forward, it would affect only patche
];
}
Signed-off-by: AKASHI Takahiro
Signed-off-by: Thiago Jung Bauermann
---
Notes:
This is a new version of the last patch in this series which adds
a function where each architecture can verify if the DTB is safe
to load:
int __weak arch_kexec_verify_buffer(enum
Am Freitag, 22 Juli 2016, 12:54:28 schrieb Michael Ellerman:
> Thiago Jung Bauermann writes:
> > So even if not ideal, the solution above is desirable for powerpc. We
> > would like to preserve the ability of allowing userspace to pass
> > parameters to the OS via the DTB, e
Am Freitag, 15 Juli 2016, 18:03:35 schrieb Thiago Jung Bauermann:
> Am Freitag, 15 Juli 2016, 22:26:09 schrieb Arnd Bergmann:
> > However, the powerpc specific RTAS runtime services provide a similar
> > interface to the UEFI runtime support and allow to call into
> > binary
"plugged" virtually by a managing system
(BMC) is considered a physical attack or a remote attack in the context of
UEFI Secure Boot.
--
[]'s
Thiago Jung Bauermann
IBM Linux Technology Center
patible properties in
/chosen to avoid the problem Mark mentioned.
Still doable, but not ideal. :-/
--
[]'s
Thiago Jung Bauermann
IBM Linux Technology Center
Am Freitag, 15 Juli 2016, 14:33:47 schrieb Mark Rutland:
> On Fri, Jul 15, 2016 at 09:26:10AM -0400, Vivek Goyal wrote:
> > On Fri, Jul 15, 2016 at 09:31:02AM +0200, Arnd Bergmann wrote:
> > > On Thursday, July 14, 2016 10:44:14 PM CEST Thiago Jung Bauermann
wrote:
> > &g
Am Donnerstag, 14 Juli 2016, 10:29:11 schrieb Arnd Bergmann:
> On Wednesday, July 13, 2016 11:18:04 PM CEST Thiago Jung Bauermann wrote:
> > Am Mittwoch, 13 Juli 2016, 21:59:18 schrieb Arnd Bergmann:
> > > On Wednesday, July 13, 2016 3:45:41 PM CEST Thiago Jung Bauermann
Am Mittwoch, 13 Juli 2016, 21:59:18 schrieb Arnd Bergmann:
> On Wednesday, July 13, 2016 3:45:41 PM CEST Thiago Jung Bauermann wrote:
> > Am Mittwoch, 13 Juli 2016, 15:13:42 schrieb Arnd Bergmann:
> > > On Wednesday, July 13, 2016 10:41:28 AM CEST Mark Rutland wrote:
> >
act with it, as Stewart mentioned in another email.
2. Set display properties on /pciex@n/.../vga@0 in machines with an
OpenFirmware framebuffer.
--
[]'s
Thiago Jung Bauermann
IBM Linux Technology Center
for this.
>
> Until a persuasive case can be made for going around the kernel and
> probably adding a feature (like code execution) that can be used to
> defeat the signature scheme I am going to nack this.
I also don't understand what you mean by code execution. How does passing a
device tree blob via kexec enables code execution? How can the signature
scheme be defeated?
--
[]'s
Thiago Jung Bauermann
IBM Linux Technology Center
. It has to modify the device tree that will be
used by the next kernel so that the next kernel uses the same console that
petitboot was configured to use (i.e., set the /chosen/linux,stdout-path
property). It also modifies the device tree to allow the kernel to inherit
Petitboot's Openfirmware framebuffer.
--
[]'s
Thiago Jung Bauermann
IBM Linux Technology Center
ish whether the process passed 5 or
6 arguments? How can it know whether extra_fds is a valid argument or just
garbage? I think we have to define a new flag KEXEC_FILE_EXTRA_FDS so that
the process can signal that it is using the new interface.
--
[]'s
Thiago Jung Bauermann
IBM Linux Technology Center
A-256 implementation.
Also, some formatting warnings found by checkpatch.pl were fixed.
Signed-off-by: Thiago Jung Bauermann
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
---
arch/powerpc/Makefile | 4 +
arch/powerpc/purgatory/.gitignore | 2 +
arch/po
Adapt all callers to the new function prototype.
In addition, change the type of kexec_buf.buffer from char * to void *.
There is no particular reason for it to be a char *, and the change
allows us to get rid of 3 existing casts to char * in the code.
Signed-off-by: Thiago Jung Bauermann
Cc
ating the ELF structs. These functions will be used in the next
patch in the series.
Signed-off-by: Thiago Jung Bauermann
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
---
arch/powerpc/include/asm/elf_util.h | 19 ++
arch/powerpc/kernel/Makefile| 2 +-
arch/po
Allow architectures to specify a different memory walking function for
kexec_add_buffer. x86 uses iomem to track reserved memory ranges, but
PowerPC uses the memblock subsystem.
Signed-off-by: Thiago Jung Bauermann
Cc: Eric Biederman
Cc: Dave Young
---
include/linux/kexec.h | 29
Adds the basic machinery needed by kexec_file_load.
Signed-off-by: Josh Sklar
Signed-off-by: Thiago Jung Bauermann
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: Michael Ellerman
---
arch/powerpc/Kconfig | 13 +
arch/powerpc/include/asm/systbl.h | 1
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