diff options
| author | Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> | 2018-08-20 13:47:32 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-12 19:47:16 +0100 |
| commit | fc090081d76a5d8acb4b78864ad74147e83ada6e (patch) | |
| tree | 9ad5d5a6c2f7e650b36dd8c0bad64ab00c2cb1ea /arch/powerpc/include | |
| parent | 84a4572bf2779118b5586a442c5efad9726d92c3 (diff) | |
powerpc/fadump: Do not allow hot-remove memory from fadump reserved area.
[ Upstream commit 0db6896ff6332ba694f1e61b93ae3b2640317633 ]
For fadump to work successfully there should not be any holes in reserved
memory ranges where kernel has asked firmware to move the content of old
kernel memory in event of crash. Now that fadump uses CMA for reserved
area, this memory area is now not protected from hot-remove operations
unless it is cma allocated. Hence, fadump service can fail to re-register
after the hot-remove operation, if hot-removed memory belongs to fadump
reserved region. To avoid this make sure that memory from fadump reserved
area is not hot-removable if fadump is registered.
However, if user still wants to remove that memory, he can do so by
manually stopping fadump service before hot-remove operation.
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/fadump.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/fadump.h b/arch/powerpc/include/asm/fadump.h index 1e7a33592e29..15bc07a31c46 100644 --- a/arch/powerpc/include/asm/fadump.h +++ b/arch/powerpc/include/asm/fadump.h @@ -200,7 +200,7 @@ struct fad_crash_memory_ranges { unsigned long long size; }; -extern int is_fadump_boot_memory_area(u64 addr, ulong size); +extern int is_fadump_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); |