diff options
| author | Hari Bathini <hbathini@linux.vnet.ibm.com> | 2017-06-01 22:51:26 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-06-28 13:08:09 +1000 |
| commit | eae0dfcc44320c79a05637534d59af4643b2ee7b (patch) | |
| tree | 0ba49c4ad13332234ad09dd34f339ac6ed839351 /arch/powerpc/include/asm/fadump.h | |
| parent | a77af552ccc9d4d54459a39f9e5f7ad307aeb4f9 (diff) | |
| download | linux-eae0dfcc44320c79a05637534d59af4643b2ee7b.tar.bz2 | |
powerpc/fadump: avoid holes in boot memory area when fadump is registered
To register fadump, boot memory area - the size of low memory chunk that
is required for a kernel to boot successfully when booted with restricted
memory, is assumed to have no holes. But this memory area is currently
not protected from hot-remove operations. So, fadump could fail to
re-register after a memory hot-remove operation, if memory is removed
from boot memory area. To avoid this, ensure that memory from boot
memory area is not hot-removed when fadump is registered.
Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
Reviewed-by: Mahesh J Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/fadump.h')
| -rw-r--r-- | arch/powerpc/include/asm/fadump.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/fadump.h b/arch/powerpc/include/asm/fadump.h index a3de219073af..ce88bbe1d809 100644 --- a/arch/powerpc/include/asm/fadump.h +++ b/arch/powerpc/include/asm/fadump.h @@ -203,6 +203,7 @@ struct fad_crash_memory_ranges { unsigned long long size; }; +extern int is_fadump_boot_memory_area(u64 addr, ulong size); extern int early_init_dt_scan_fw_dump(unsigned long node, const char *uname, int depth, void *data); extern int fadump_reserve_mem(void); |