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| author | Hari Bathini <hbathini@linux.ibm.com> | 2019-09-11 17:56:59 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-09-13 17:04:45 +0300 |
| commit | 7b1b3b48250acbfd7f15ba950d4654b7f02a8300 (patch) | |
| tree | 483109c7a7956322efab7ae8b3ed71cebb7ceec7 /arch/powerpc/include/asm | |
| parent | 845426f3f3443c3f60737751b7af0142e3020f08 (diff) | |
| download | linux-7b1b3b48250acbfd7f15ba950d4654b7f02a8300.tar.xz | |
powerpc/fadump: consider f/w load area
OPAL loads kernel & initrd at 512MB offset (256MB size), also exported
as ibm,opal/dump/fw-load-area. So, if boot memory size of FADump is
less than 768MB, kernel memory to be exported as '/proc/vmcore' would
be overwritten by f/w while loading kernel & initrd. To avoid such a
scenario, enforce a minimum boot memory size of 768MB on OPAL platform
and skip using FADump if a newer F/W version loads kernel & initrd
above 768MB.
Also, irrespective of RMA size, set the minimum boot memory size
expected on pseries platform at 320MB. This is to avoid inflating the
minimum memory requirements on systems with 512M/1024M RMA size.
Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/156821381414.5656.1592867278535469652.stgit@hbathini.in.ibm.com
Diffstat (limited to 'arch/powerpc/include/asm')
| -rw-r--r-- | arch/powerpc/include/asm/fadump-internal.h | 11 |
1 files changed, 1 insertions, 10 deletions
diff --git a/arch/powerpc/include/asm/fadump-internal.h b/arch/powerpc/include/asm/fadump-internal.h index 6c2868d38bd3..a669aaa7c610 100644 --- a/arch/powerpc/include/asm/fadump-internal.h +++ b/arch/powerpc/include/asm/fadump-internal.h @@ -19,16 +19,6 @@ #define RMA_START 0x0 #define RMA_END (ppc64_rma_size) -/* - * On some Power systems where RMO is 128MB, it still requires minimum of - * 256MB for kernel to boot successfully. When kdump infrastructure is - * configured to save vmcore over network, we run into OOM issue while - * loading modules related to network setup. Hence we need additional 64M - * of memory to avoid OOM issue. - */ -#define MIN_BOOT_MEM (((RMA_END < (0x1UL << 28)) ? (0x1UL << 28) : RMA_END) \ - + (0x1UL << 26)) - /* The upper limit percentage for user specified boot memory size (25%) */ #define MAX_BOOT_MEM_RATIO 4 @@ -128,6 +118,7 @@ struct fadump_ops { u64 (*fadump_init_mem_struct)(struct fw_dump *fadump_conf); u64 (*fadump_get_metadata_size)(void); int (*fadump_setup_metadata)(struct fw_dump *fadump_conf); + u64 (*fadump_get_bootmem_min)(void); int (*fadump_register)(struct fw_dump *fadump_conf); int (*fadump_unregister)(struct fw_dump *fadump_conf); int (*fadump_invalidate)(struct fw_dump *fadump_conf); |