for MPIPL support:
https://patchwork.ozlabs.org/project/skiboot/list/?series=119169
("MPIPL support")
Changes in v4:
* Split the patches.
* Rebased to latest upstream kernel version.
* Updated according to latest OPAL changes.
---
Hari Bathini (25):
powerpc/fa
Kernel config option CONFIG_PRESERVE_FA_DUMP is introduced to ensure
crash data, from previously crash'ed kernel, is preserved. Update
documentation with this details.
Signed-off-by: Hari Bathini
---
Documentation/powerpc/firmware-assisted-dump.txt |9 +
1 file changed, 9 insertions
Writing '1' to /sys/kernel/fadump_release_opalcore would release the
memory held by kernel in exporting /sys/firmware/opal/core file.
Signed-off-by: Hari Bathini
---
arch/powerpc/platforms/powernv/opal-core.c | 38
1 file changed, 38 insertions(+)
diff --git
Make RTAS calls to register and un-register for FADump. Also, update
how fadump_region contents are diplayed to provide more information.
Signed-off-by: Hari Bathini
---
arch/powerpc/kernel/fadump-common.h |2
arch/powerpc/kernel/fadump.c | 164
From: Hari Bathini
Firmware provides architected register state data at the time of crash.
Process this data and build CPU notes to append to ELF core.
Signed-off-by: Hari Bathini
Signed-off-by: Vasant Hegde
---
arch/powerpc/kernel/fadump-common.h |4 +
arch/powerpc/platforms
enforce a minimum boot memory size of 768MB on OPAL platform.
Also, skip using FADump if a newer F/W version loads kernel & initrd
above 768MB.
Signed-off-by: Hari Bathini
---
arch/powerpc/kernel/fadump-common.h | 11 +-
arch/powerpc/kernel/fadump.c
fadump is pronounced f-a-dump. Update documentation accordingly. Also,
update how fadump_region contents look like with recent changes.
Signed-off-by: Hari Bathini
---
Documentation/powerpc/firmware-assisted-dump.txt | 71 --
1 file changed, 39 insertions(+), 32 deletions
If not all kernel boot memory regions are registered for MPIPL before
system crashes, try processing the partial crashdump but warn the user
before proceeding.
Signed-off-by: Hari Bathini
---
arch/powerpc/platforms/powernv/opal-fadump.c | 21 +
1 file changed, 21
Currently, FADump is only supported on pSeries but that is going to
change soon with FADump support being added on PowerNV platform. So,
move rtas specific definitions to platform code to allow FADump
to have multiple platforms support.
Signed-off-by: Hari Bathini
---
arch/powerpc/include/asm
Add support in the kernel to process the crash'ed kernel's memory
preserved during MPIPL and export it as /proc/vmcore file for the
userland scripts to filter and analyze it later.
Signed-off-by: Hari Bathini
---
arch/powerpc/platforms/powernv/opal-fadump.c | 190 ++
1
Introduce callback functions for platform specific operations like
register, unregister, invalidate & such. Also, define place-holders
for the same on pSeries platform.
Signed-off-by: Hari Bathini
---
arch/powerpc/kernel/fadump-common.h | 33 ++
arch/powerpc/kernel/fadu
Make OPAL calls to register and un-register with firmware for MPIPL.
Signed-off-by: Hari Bathini
---
arch/powerpc/platforms/powernv/opal-fadump.c | 71 +-
1 file changed, 69 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/opal-fadump.c
b
ved ranges is not overlapped with memory released by capture
kernel aftering saving vmcore. Also, fix the off-by-one error in
fadump_release_reserved_area function while releasing memory.
Signed-off-by: Hari Bathini
---
arch/powerpc/kernel/fadump.c | 61 +-
1 file c
From: Hari Bathini
Export /sys/firmware/opal/core file to analyze opal crashes. Since OPAL
core can be generated independent of CONFIG_FA_DUMP support in kernel,
add this support under a new kernel config option CONFIG_OPAL_CORE.
Also, avoid code duplication by moving common code used while
Make way for refactoring platform specific FADump code by moving code
that could be referenced from multiple places to fadump-common.c file.
Signed-off-by: Hari Bathini
---
arch/powerpc/kernel/Makefile|2
arch/powerpc/kernel/fadump-common.c | 144
memory regions. This allows having an adequate FADump
capture kernel size for different scenarios.
Signed-off-by: Hari Bathini
---
arch/powerpc/kernel/fadump-common.c | 15 ++
arch/powerpc/kernel/fadump-common.h | 16 ++
arch/powerpc/kernel/fadump.c | 173
for this config option is petitboot kernel.
As OPAL allows registering address with it in the first kernel and
retrieving it after MPIPL, use it to store the top of boot memory.
A kernel that intends to preserve crash data retrieves it and avoids
using memory beyond this address.
Signed-off-by: Hari Bathini
The figures depicting FADump's (Firmware-Assisted Dump) memory layout
are missing some finer details like different memory regions and what
they represent. Improve the documentation by updating those details.
Signed-off-by: Hari Bathini
---
Documentation/powerpc/firmware-assisted-dump.txt
Add basic callback functions for FADump on PowerNV platform.
Signed-off-by: Hari Bathini
---
arch/powerpc/Kconfig |5 +
arch/powerpc/kernel/fadump-common.h | 10 +++
arch/powerpc/kernel/fadump.c |3 +
arch/powerpc/platforms/powernv
With FADump support now available on both pseries and OPAL platforms,
update FADump documentation with these details.
Signed-off-by: Hari Bathini
---
Documentation/powerpc/firmware-assisted-dump.txt | 104 +-
1 file changed, 63 insertions(+), 41 deletions(-)
diff --git
With /sys/firmware/opal/core support available on OPAL based machines
and an option to the release memory used by kernel in exporting this
core file, update FADump documentation with these details.
Signed-off-by: Hari Bathini
---
Documentation/powerpc/firmware-assisted-dump.txt | 19
On 13/08/19 4:11 PM, Mahesh J Salgaonkar wrote:
> On 2019-07-16 17:03:15 Tue, Hari Bathini wrote:
>> OPAL allows registering address with it in the first kernel and
>> retrieving it after MPIPL. Setup kernel metadata and register its
>> address with OPAL to use it for proc
On 12/08/19 3:12 PM, Mahesh J Salgaonkar wrote:
> On 2019-07-16 17:02:30 Tue, Hari Bathini wrote:
>> Introduce callback functions for platform specific operations like
>> register, unregister, invalidate & such. Also, define place-holders
>> for the same on pSeries p
On 12/08/19 9:31 PM, Mahesh J Salgaonkar wrote:
> On 2019-07-16 17:02:38 Tue, Hari Bathini wrote:
>> Make RTAS calls to register and un-register for FADump. Also, update
>> how fadump_region contents are diplayed to provide more information.
>>
>> Signed-off-by: Ha
On 13/08/19 8:04 PM, Mahesh J Salgaonkar wrote:
> On 2019-07-16 17:03:23 Tue, Hari Bathini wrote:
>> Make OPAL calls to register and un-register with firmware for MPIPL.
>>
>> Signed-off-by: Hari Bathini
>> ---
>> arch/powerpc/platf
On 13/08/19 8:33 PM, Mahesh J Salgaonkar wrote:
> On 2019-07-16 17:03:30 Tue, Hari Bathini wrote:
>> Firmware uses 32-bit field for region size while copying/backing-up
>> memory during MPIPL. So, the maximum copy size for a region would
>> be a page less than 4GB
On 14/08/19 3:48 PM, Mahesh J Salgaonkar wrote:
> On 2019-07-16 17:03:38 Tue, Hari Bathini wrote:
>> Add support in the kernel to process the crash'ed kernel's memory
>> preserved during MPIPL and export it as /proc/vmcore file for the
>> userland scripts to filter
On 14/08/19 10:45 PM, Mahesh J Salgaonkar wrote:
> On 2019-07-16 17:04:08 Tue, Hari Bathini wrote:
>> From: Hari Bathini
>>
>> Firmware provides architected register state data at the time of crash.
>> Process this data and build CPU notes to append to ELF core
On 14/08/19 3:51 PM, Mahesh Jagannath Salgaonkar wrote:
> On 8/14/19 12:36 PM, Hari Bathini wrote:
>>
>>
>> On 13/08/19 4:11 PM, Mahesh J Salgaonkar wrote:
>>> On 2019-07-16 17:03:15 Tue, Hari Bathini wrote:
>>>> OPAL allows registering address with
hesh on V4.
---
Hari Bathini (31):
powerpc/fadump: move internal macros/definitions to a new header
powerpc/fadump: move internal code to a new file
powerpc/fadump: Improve fadump documentation
pseries/fadump: move rtas specific definitions to platform code
pseries/fadump:
Though asm/fadump.h is meant to be used by other components dealing
with FADump, it also has macros/definitions internal to FADump code.
Move them to a new header file used within FADump code. This also
makes way for refactoring platform specific FADump code.
Signed-off-by: Hari Bathini
Except for reserve dump area which is permanent reserved, all memory
above boot memory size is released when the dump is invalidated. Make
this a bit more explicit in the code.
Signed-off-by: Hari Bathini
---
arch/powerpc/kernel/fadump.c | 34 ++
1 file changed
Make way for refactoring platform specific FADump code by moving code
that could be referenced from multiple places to fadump-common.c file.
Signed-off-by: Hari Bathini
---
arch/powerpc/kernel/Makefile|2
arch/powerpc/kernel/fadump-common.c | 140
Signed-off-by: Hari Bathini
---
arch/powerpc/include/asm/opal-api.h| 50 +++-
arch/powerpc/include/asm/opal.h|6 +++
arch/powerpc/platforms/powernv/opal-call.c |3 ++
3 files changed, 58 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc
errors.
So, request firmware to copy multiple kernel boot memory regions
instead of just one (which worked fine for pseries as 64-bit field
was used for size there).
Signed-off-by: Hari Bathini
---
arch/powerpc/platforms/powernv/opal-fadump.c | 35 +-
1 file changed, 28
failure.
Signed-off-by: Hari Bathini
---
arch/powerpc/kernel/fadump-common.h |8
arch/powerpc/kernel/fadump.c|2 +-
2 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/fadump-common.h
b/arch/powerpc/kernel/fadump-common.h
index d2dd117
The size parameter to fadump_reserve_crash_area() function is not needed
as all the memory above boot memory size must be preserved anyway. Update
the function by dropping this redundant parameter.
Signed-off-by: Hari Bathini
---
arch/powerpc/kernel/fadump.c | 53
Writing '1' to /sys/kernel/fadump_release_opalcore would release the
memory held by kernel in exporting /sys/firmware/opal/core file.
Signed-off-by: Hari Bathini
---
arch/powerpc/platforms/powernv/opal-core.c | 38
1 file changed, 38 insertions(+)
diff --git
Introduce callback functions for platform specific operations like
register, unregister, invalidate & such. Also, define place-holders
for the same on pSeries platform.
Signed-off-by: Hari Bathini
---
arch/powerpc/kernel/fadump-common.h | 26 +
arch/powerpc/kernel/fadu
From: Hari Bathini
Firmware provides architected register state data at the time of crash.
Process this data and build CPU notes to append to ELF core.
Signed-off-by: Hari Bathini
Signed-off-by: Vasant Hegde
---
arch/powerpc/kernel/fadump-common.h |4 +
arch/powerpc/platforms
Kernel config option CONFIG_PRESERVE_FA_DUMP is introduced to ensure
crash data, from previously crash'ed kernel, is preserved. Update
documentation with this details.
Signed-off-by: Hari Bathini
---
Documentation/powerpc/firmware-assisted-dump.rst |9 +
1 file changed, 9 insertions
fadump is pronounced f-a-dump. Update documentation accordingly. Also,
update how fadump_region contents look like with recent changes.
Signed-off-by: Hari Bathini
---
Documentation/powerpc/firmware-assisted-dump.rst | 55 --
1 file changed, 30 insertions(+), 25 deletions
Add support in the kernel to process the crash'ed kernel's memory
preserved during MPIPL and export it as /proc/vmcore file for the
userland scripts to filter and analyze it later.
Signed-off-by: Hari Bathini
---
arch/powerpc/platforms/powernv/opal-fadump.c | 165 ++
1
ved ranges is not overlapped with memory released by capture
kernel aftering saving vmcore. Also, fix the off-by-one error in
fadump_release_reserved_area function while releasing memory.
Signed-off-by: Hari Bathini
---
arch/powerpc/kernel/fadump.c | 150 +++---
1 file ch
From: Hari Bathini
Export /sys/firmware/opal/core file to analyze opal crashes. Since OPAL
core can be generated independent of CONFIG_FA_DUMP support in kernel,
add this support under a new kernel config option CONFIG_OPAL_CORE.
Also, avoid code duplication by moving common code used while
Make RTAS calls to register and un-register for FADump. Also, update
how fadump_region contents are diplayed to provide more information.
Signed-off-by: Hari Bathini
Reviewed-by: Mahesh Salgaonkar
---
arch/powerpc/kernel/fadump-common.h |2
arch/powerpc/kernel/fadump.c
With FADump support now available on both pseries and OPAL platforms,
update FADump documentation with these details.
Signed-off-by: Hari Bathini
---
Documentation/powerpc/firmware-assisted-dump.rst | 104 +-
1 file changed, 63 insertions(+), 41 deletions(-)
diff --git
arch_reserved_kernel_pages() function as it is needed for both
FA_DUMP and PRESERVE_FA_DUMP configurations.
Signed-off-by: Hari Bathini
---
arch/powerpc/Kconfig |9 +++
arch/powerpc/include/asm/fadump.h|9 ++-
arch/powerpc/kernel/Makefile |6 ++
arch
Currently, FADump is only supported on pSeries but that is going to
change soon with FADump support being added on PowerNV platform. So,
move rtas specific definitions to platform code to allow FADump
to have multiple platforms support.
Signed-off-by: Hari Bathini
---
arch/powerpc/include/asm
OPAL allows registering address with it in the first kernel and
retrieving it after MPIPL. Setup kernel metadata and register its
address with OPAL to use it for processing the crash dump.
Signed-off-by: Hari Bathini
---
arch/powerpc/kernel/fadump-common.h |4 +
arch/powerpc/kernel
The figures depicting FADump's (Firmware-Assisted Dump) memory layout
are missing some finer details like different memory regions and what
they represent. Improve the documentation by updating those details.
Signed-off-by: Hari Bathini
---
Documentation/powerpc/firmware-assisted-dump.rst
Move code that supports processing the crash'ed kernel's memory
preserved by firmware to platform specific callback functions.
Signed-off-by: Hari Bathini
---
arch/powerpc/kernel/fadump.c | 343 +-
arch/powerpc/platforms/pseries/rtas-fadump.c | 280
Add basic callback functions for FADump on PowerNV platform.
Signed-off-by: Hari Bathini
---
arch/powerpc/Kconfig |5 +
arch/powerpc/kernel/fadump-common.h |9 ++
arch/powerpc/kernel/fadump.c |3 +
arch/powerpc/platforms/powernv
Make OPAL calls to register and un-register with firmware for MPIPL.
Signed-off-by: Hari Bathini
---
arch/powerpc/platforms/powernv/opal-fadump.c | 79 +-
1 file changed, 77 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/platforms/powernv/opal-fadump.c
b
Make allocate_crash_memory_ranges() and free_crash_memory_ranges()
functions generic to reuse them for memory management of all types of
dynamic memory range arrays. This change helps in memory management
of reserved ranges array to be added later.
Signed-off-by: Hari Bathini
---
arch/powerpc
With support to copy multiple kernel boot memory regions owing to copy
size limitation, also handle holes in the memory area to be preserved.
Support as many as 128 kernel boot memory regions. This allows having
an adequate FADump capture kernel size for different scenarios.
Signed-off-by: Hari
During kexec boot, metadata address needs to be reset to avoid running
into errors interpreting stale metadata address, in case the kexec'ed
kernel crashes before metadata address could be setup again.
Signed-off-by: Hari Bathini
---
arch/powerpc/kernel/fadump-common.h |1 +
arch
Make OPAL call to indicate that the dump is processed and the metadata
area in OPAL can be cleared/released. Also, setup/initialize FADump
for re-registration.
Signed-off-by: Hari Bathini
---
arch/powerpc/kernel/fadump.c |7 ++-
arch/powerpc/platforms/powernv/opal
requirements on systems with 512M/1024M RMA size.
Signed-off-by: Hari Bathini
---
arch/powerpc/kernel/fadump-common.h | 11 +-
arch/powerpc/kernel/fadump.c | 11 +-
arch/powerpc/platforms/powernv/opal-fadump.c | 29 ++
arch/power
If all kernel boot memory regions are not registered for MPIPL before
system crashes, try processing the partial crashdump but warn the user
before proceeding.
Signed-off-by: Hari Bathini
---
arch/powerpc/platforms/powernv/opal-fadump.c | 24
1 file changed, 24
With /sys/firmware/opal/core support available on OPAL based machines
and an option to the release memory used by kernel in exporting this
core file, update FADump documentation with these details.
Signed-off-by: Hari Bathini
---
Documentation/powerpc/firmware-assisted-dump.rst | 19
On 27/08/19 8:49 AM, Michael Ellerman wrote:
> Hari Bathini writes:
>> On 26/08/19 4:14 PM, Sourabh Jain wrote:
>>> On 8/26/19 3:46 PM, Sourabh Jain wrote:
>>>> On 8/26/19 3:29 PM, Hari Bathini wrote:
>>>>> On 10/08/19 11:29 PM, Sourabh Jain wrote:
During kexec boot, metadata address needs to be reset to avoid running
into errors interpreting stale metadata address, in case the kexec'ed
kernel crashes before metadata address could be setup again.
Signed-off-by: Hari Bathini
---
* Added check in fadump_cleanup() function for whether FADump
On 20/08/19 5:35 PM, Hari Bathini wrote:
> During kexec boot, metadata address needs to be reset to avoid running
> into errors interpreting stale metadata address, in case the kexec'ed
> kernel crashes before metadata address could be setup again.
>
> Signed-off-b
Hi Michal,
Thanks for the patch.
On 20/08/19 11:42 PM, Michal Suchanek wrote:
> Currently it is not possible to distinguish the case when fadump is
> supported by firmware and disabled in kernel and completely unsupported
> using the kernel sysfs interface. User can investigate the devicetree
On 03/09/19 4:39 PM, Michael Ellerman wrote:
> Hari Bathini writes:
>> Though asm/fadump.h is meant to be used by other components dealing
>> with FADump, it also has macros/definitions internal to FADump code.
>> Move them to a new header file used within FADump code. T
On 03/09/19 4:40 PM, Michael Ellerman wrote:
> Hari Bathini writes:
>> Add basic callback functions for FADump on PowerNV platform.
>
> I assume this doesn't actually work yet?
>
> Does something block it from appearing to work at runtime?
With this patch, "fadum
On 03/09/19 4:40 PM, Michael Ellerman wrote:
> Hari Bathini writes:
>
>> Except for reserve dump area which is permanent reserved, all memory
> permanently
>
>> above boot memory size is released when the dump is invalidated.
On 03/09/19 4:39 PM, Michael Ellerman wrote:
> Hari Bathini writes:
>> Make way for refactoring platform specific FADump code by moving code
>> that could be referenced from multiple places to fadump-common.c file.
>>
>> Signed-off-by: Hari Bathini
>> ---
On 03/09/19 4:40 PM, Michael Ellerman wrote:
> Hari Bathini writes:
>> Introduce callback functions for platform specific operations like
>> register, unregister, invalidate & such. Also, define place-holders
>> for the same on pSeries platform.
>
> W
On 03/09/19 4:40 PM, Michael Ellerman wrote:
> Hari Bathini writes:
>> diff --git a/arch/powerpc/include/asm/opal-api.h
>> b/arch/powerpc/include/asm/opal-api.h
>> index 383242e..c8a5665 100644
>> --- a/arch/powerpc/include/asm/opal-api.h
>> +++ b/ar
On 03/09/19 4:40 PM, Michael Ellerman wrote:
> Hari Bathini writes:
>> Make RTAS calls to register and un-register for FADump. Also, update
>> how fadump_region contents are diplayed to provide more information.
>
> That sounds like two independent changes, so can t
On 10/08/19 11:29 PM, Sourabh Jain wrote:
> Add a sys interface to allow querying the memory reserved by
> fadump for saving the crash dump.
>
> Add an ABI doc entry for new sysfs interface.
>- /sys/kernel/fadump_mem_reserved
>
> Signed-off-by: Sourabh Jain
> ---
> Changelog:
> v1 -> v2:
On 26/08/19 4:14 PM, Sourabh Jain wrote:
>
>
> On 8/26/19 3:46 PM, Sourabh Jain wrote:
>>
>>
>> On 8/26/19 3:29 PM, Hari Bathini wrote:
>>>
>>>
>>> On 10/08/19 11:29 PM, Sourabh Jain wrote:
>>>> Add a sys interface to allow que
On 28/08/19 10:37 PM, Michal Suchánek wrote:
> On Tue, 27 Aug 2019 17:57:31 +0530
> Hari Bathini wrote:
>
[...]
>> Also, get rid of the error message when fadump is
>> not supported as it is already taken care of in fadump_reserve_mem()
>> function.
>
message already logged during
early boot in fadump_reserve_mem() function. I am not strongly against
this though. So...
Acked-by: Hari Bathini
On 04/09/19 2:32 PM, Mahesh Jagannath Salgaonkar wrote:
> On 9/3/19 9:35 PM, Hari Bathini wrote:
>>
>>
>> On 03/09/19 4:39 PM, Michael Ellerman wrote:
>>> Hari Bathini writes:
>>>> Make way for refactoring platform specific FADump code by moving code
&
On 03/09/19 10:01 PM, Hari Bathini wrote:
>
[...]
>>> diff --git a/arch/powerpc/kernel/fadump-common.h
>>> b/arch/powerpc/kernel/fadump-common.h
>>> index d2c5b16..f6c52d3 100644
>>> --- a/arch/powerpc/kernel/fadump-common.h
>>> +++ b/arch/powe
On 04/09/19 5:00 PM, Michael Ellerman wrote:
> Hari Bathini writes:
>> Firmware uses 32-bit field for region size while copying/backing-up
>
> Which firmware exactly is imposing that limit?
I think the MDST/MDRT tables in the f/w. Vasant,
On 03/09/19 9:36 PM, Hari Bathini wrote:
>
>
> On 03/09/19 4:40 PM, Michael Ellerman wrote:
>> Hari Bathini writes:
>>> Introduce callback functions for platform specific operations like
>>> register, unregister, invalidate & such. Also, define plac
On 09/09/19 9:03 PM, Oliver O'Halloran wrote:
> On Mon, Sep 9, 2019 at 11:23 PM Hari Bathini wrote:
>>
>> On 04/09/19 5:50 PM, Michael Ellerman wrote:
>>> Hari Bathini writes:
>>>
>>
>> [...]
>>
>>>> +/*
>>>> + * CPU
On 10/09/19 7:35 PM, Michael Ellerman wrote:
> Hari Bathini writes:
>> On 09/09/19 9:03 PM, Oliver O'Halloran wrote:
>>> On Mon, Sep 9, 2019 at 11:23 PM Hari Bathini wrote:
>>>> On 04/09/19 5:50 PM, Michael Ellerman wrote:
>>>>> Hari Bathini writ
On 04/09/19 5:50 PM, Michael Ellerman wrote:
> Hari Bathini writes:
>
[...]
>> +/*
>> + * CPU state data is provided by f/w. Below are the definitions
>> + * provided in HDAT spec. Refer to latest HDAT specification for
>> + * any update to this format.
>>
On 04/09/19 5:12 PM, Michael Ellerman wrote:
> Hari Bathini writes:
>> diff --git a/arch/powerpc/platforms/powernv/opal-fadump.c
>> b/arch/powerpc/platforms/powernv/opal-fadump.c
>> index a755705..10f6086 100644
>> --- a/arch/powerpc/platforms/powernv/opal-fad
On 05/09/19 12:53 PM, Michael Ellerman wrote:
> Hari Bathini writes:
>> diff --git a/arch/powerpc/platforms/powernv/opal-fadump.c
>> b/arch/powerpc/platforms/powernv/opal-fadump.c
>> index e466f7e..91fb909 100644
>> --- a/arch/powerpc/platforms/powernv/opal-fad
tual address is used often.
Signed-off-by: Hari Bathini
---
* New patch to add a few helper functions. Also, save vaddr for CPU notes
buffer in fw_dump structure.
arch/powerpc/include/asm/fadump-internal.h |2
arch/powerpc/kernel/fadump.c | 127 +++
The figures depicting FADump's (Firmware-Assisted Dump) memory layout
are missing some finer details like different memory regions and what
they represent. Improve the documentation by updating those details.
Signed-off-by: Hari Bathini
---
* No changes in v6.
Documentation/powerpc/firmware
Move platform specific register/un-register code, the RTAS calls, to
register/un-register callback functions. This would also mean moving
code that initializes and prints the platform specific FADump data.
Signed-off-by: Hari Bathini
Reviewed-by: Mahesh Salgaonkar
---
Changes in v6:
* Split
the patches based on discussions with mahesh on V4.
---
Hari Bathini (36):
powerpc/fadump: move internal macros/definitions to a new header
powerpc/fadump: add helper functions
powerpc/fadump: declare helper functions in internal header file
powerpc/fadump: Improve fadump
Use helper functions to simplify memory allocation, pinning down and
freeing the memory used for CPU notes buffer.
Signed-off-by: Hari Bathini
---
* New patch to improve CPU notes buffer allocation.
arch/powerpc/kernel/fadump.c | 21 ++---
1 file changed, 6 insertions
Currently, FADump is only supported on pSeries but that is going to
change soon with FADump support being added on PowerNV platform. So,
move rtas specific definitions to platform code to allow FADump
to have multiple platforms support.
Signed-off-by: Hari Bathini
---
Changes in v6:
* Use
Introduce callback functions for platform specific operations like
register, unregister, invalidate & such. Also, define place-holders
for the same on pSeries platform.
Signed-off-by: Hari Bathini
---
Changes in v6:
* Drop using unnecessary return type for platform specific DT scan func
Improve how fadump_region contents are displayed by adding source
information of memory regions that are to be dumped by f/w.
Signed-off-by: Hari Bathini
---
* New patch to update how fadump region contents are displayed.
arch/powerpc/platforms/pseries/rtas-fadump.c |8
1 file
Though asm/fadump.h is meant to be used by other components dealing
with FADump, it also has macros/definitions internal to FADump code.
Move them to a new header file used within FADump code. This also
makes way for refactoring platform specific FADump code.
Signed-off-by: Hari Bathini
Declare helper functions, that can be reused by multiple platforms,
in the internal header file.
Signed-off-by: Hari Bathini
---
Changes in v6:
* Declare helper functions in internal header while keeping the definitions
in arch/powerpc/kernel/fadump.c itself.
arch/powerpc/include/asm
), is released when the dump is invalidated. Make
this a bit more explicit in the code.
Signed-off-by: Hari Bathini
---
Changes in v6:
* Changelog update.
arch/powerpc/kernel/fadump.c | 34 ++
1 file changed, 10 insertions(+), 24 deletions(-)
diff --git a/arch
Move code that supports processing the crash'ed kernel's memory
preserved by firmware to platform specific callback functions.
Signed-off-by: Hari Bathini
---
* No major changes in v6.
arch/powerpc/kernel/fadump.c | 329 +-
arch/powerpc/platforms
fadump is pronounced f-a-dump. Update documentation accordingly. Also,
update how fadump_region contents look like with recent changes.
Signed-off-by: Hari Bathini
---
* No changes in v6.
Documentation/powerpc/firmware-assisted-dump.rst | 55 --
1 file changed, 30
Add basic callback functions for FADump on PowerNV platform.
Signed-off-by: Hari Bathini
---
Changes in v6:
* Drop using unnecessary return type for platform specific DT scan function.
arch/powerpc/Kconfig |5 +
arch/powerpc/include/asm/fadump-internal.h
OPAL allows registering address with it in the first kernel and
retrieving it after MPIPL. Setup kernel metadata and register its
address with OPAL to use it for processing the crash dump.
Signed-off-by: Hari Bathini
---
Changes in v6:
* Use kernel types instead of ulong and such
* Drop
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