diff options
| author | Hari Bathini <hbathini@linux.ibm.com> | 2024-05-09 17:27:54 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2024-05-10 16:36:10 +1000 |
| commit | 683eab94da75bcf55a9c65e0c31d0529edebe86d (patch) | |
| tree | 709d2b7b19383de9c91841183e0e5111260e2ad7 /arch/powerpc/include/asm | |
| parent | 78d5cc15fb7d1b2683f0baf418a9a870c02319fb (diff) | |
powerpc/fadump: setup additional parameters for dump capture kernel
For fadump case, passing additional parameters to dump capture kernel
helps in minimizing the memory footprint for it and also provides the
flexibility to disable components/modules, like hugepages, that are
hindering the boot process of the special dump capture environment.
Set up a dedicated parameter area to be passed to the capture kernel.
This area type is defined as RTAS_FADUMP_PARAM_AREA. Sysfs attribute
'/sys/kernel/fadump/bootargs_append' is exported to the userspace to
specify the additional parameters to be passed to the capture kernel
Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240509115755.519982-3-hbathini@linux.ibm.com
Diffstat (limited to 'arch/powerpc/include/asm')
| -rw-r--r-- | arch/powerpc/include/asm/fadump-internal.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/fadump-internal.h b/arch/powerpc/include/asm/fadump-internal.h index 35787fa1ac60..e83869a4eb6a 100644 --- a/arch/powerpc/include/asm/fadump-internal.h +++ b/arch/powerpc/include/asm/fadump-internal.h @@ -124,6 +124,8 @@ struct fw_dump { unsigned long cpu_notes_buf_vaddr; unsigned long cpu_notes_buf_size; + unsigned long param_area; + /* * Maximum size supported by firmware to copy from source to * destination address per entry. @@ -138,6 +140,7 @@ struct fw_dump { unsigned long dump_active:1; unsigned long dump_registered:1; unsigned long nocma:1; + unsigned long param_area_supported:1; struct fadump_ops *ops; }; |