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| author | Hari Bathini <hbathini@linux.ibm.com> | 2024-05-09 14:57:53 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2024-05-10 09:36:10 +0300 |
| commit | 78d5cc15fb7d1b2683f0baf418a9a870c02319fb (patch) | |
| tree | ea3a6361476b14d363b0fee5e73a9a51f829a282 /arch/powerpc/platforms/pseries/rtas-fadump.h | |
| parent | 98ec6d38ee57a734123c6f5d42640804034024ef (diff) | |
| download | linux-78d5cc15fb7d1b2683f0baf418a9a870c02319fb.tar.xz | |
powerpc/pseries/fadump: add support for multiple boot memory regions
Currently, fadump on pseries assumes a single boot memory region even
though f/w supports more than one boot memory region. Add support for
more boot memory regions to make the implementation flexible for any
enhancements that introduce other region types. For this, rtas memory
structure for fadump is updated to have multiple boot memory regions
instead of just one. Additionally, methods responsible for creating
the fadump memory structure during both the first and second kernel
boot have been modified to take these multiple boot memory regions
into account. Also, a new callback has been added to the fadump_ops
structure to get the maximum boot memory regions supported by the
platform.
Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com>
Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240509115755.519982-2-hbathini@linux.ibm.com
Diffstat (limited to 'arch/powerpc/platforms/pseries/rtas-fadump.h')
| -rw-r--r-- | arch/powerpc/platforms/pseries/rtas-fadump.h | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/arch/powerpc/platforms/pseries/rtas-fadump.h b/arch/powerpc/platforms/pseries/rtas-fadump.h index fd59bd7ca9c3..6740f4981bb8 100644 --- a/arch/powerpc/platforms/pseries/rtas-fadump.h +++ b/arch/powerpc/platforms/pseries/rtas-fadump.h @@ -29,6 +29,15 @@ /* Dump status flag */ #define RTAS_FADUMP_ERROR_FLAG 0x2000 +/* + * The Firmware Assisted Dump Memory structure supports a maximum of 10 sections + * in the dump memory structure. Presently, first two sections are used for + * CPU and HPTE data, while the remaining eight sections can be used for + * boot memory regions. + */ +#define MAX_SECTIONS 10 +#define RTAS_FADUMP_MAX_BOOT_MEM_REGS 8 + /* Kernel Dump section info */ struct rtas_fadump_section { __be32 request_flag; @@ -61,20 +70,15 @@ struct rtas_fadump_section_header { * Firmware Assisted dump memory structure. This structure is required for * registering future kernel dump with power firmware through rtas call. * - * No disk dump option. Hence disk dump path string section is not included. + * In version 1, the platform permits one section header, dump-disk path + * and ten sections. + * + * Note: No disk dump option. Hence disk dump path string section is not + * included. */ struct rtas_fadump_mem_struct { struct rtas_fadump_section_header header; - - /* Kernel dump sections */ - struct rtas_fadump_section cpu_state_data; - struct rtas_fadump_section hpte_region; - - /* - * TODO: Extend multiple boot memory regions support in the kernel - * for this platform. - */ - struct rtas_fadump_section rmr_region; + struct rtas_fadump_section rgn[MAX_SECTIONS]; }; /* |