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| author | Hari Bathini <hbathini@linux.ibm.com> | 2020-07-29 17:09:19 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-07-29 23:47:53 +1000 |
| commit | f891f19736bdf404845f97d8038054be37160ea8 (patch) | |
| tree | 7a715576cdcefd936729461820405ac0295965f2 /kernel/kexec_file.c | |
| parent | fdaa7ce2016ccd09a538b05bace5f4479662ddcb (diff) | |
| download | linux-f891f19736bdf404845f97d8038054be37160ea8.tar.gz linux-f891f19736bdf404845f97d8038054be37160ea8.tar.bz2 linux-f891f19736bdf404845f97d8038054be37160ea8.zip | |
kexec_file: Allow archs to handle special regions while locating memory hole
Some architectures may have special memory regions, within the given
memory range, which can't be used for the buffer in a kexec segment.
Implement weak arch_kexec_locate_mem_hole() definition which arch code
may override, to take care of special regions, while trying to locate
a memory hole.
Also, add the missing declarations for arch overridable functions and
and drop the __weak descriptors in the declarations to avoid non-weak
definitions from becoming weak.
Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Tested-by: Pingfan Liu <piliu@redhat.com>
Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Acked-by: Dave Young <dyoung@redhat.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/159602273603.575379.17665852963340380839.stgit@hbathini
Diffstat (limited to 'kernel/kexec_file.c')
| -rw-r--r-- | kernel/kexec_file.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c index bb05fd52de85..eb42d2efa16a 100644 --- a/kernel/kexec_file.c +++ b/kernel/kexec_file.c @@ -658,6 +658,19 @@ int kexec_locate_mem_hole(struct kexec_buf *kbuf) } /** + * arch_kexec_locate_mem_hole - Find free memory to place the segments. + * @kbuf: Parameters for the memory search. + * + * On success, kbuf->mem will have the start address of the memory region found. + * + * Return: 0 on success, negative errno on error. + */ +int __weak arch_kexec_locate_mem_hole(struct kexec_buf *kbuf) +{ + return kexec_locate_mem_hole(kbuf); +} + +/** * kexec_add_buffer - place a buffer in a kexec segment * @kbuf: Buffer contents and memory parameters. * @@ -669,7 +682,6 @@ int kexec_locate_mem_hole(struct kexec_buf *kbuf) */ int kexec_add_buffer(struct kexec_buf *kbuf) { - struct kexec_segment *ksegment; int ret; @@ -697,7 +709,7 @@ int kexec_add_buffer(struct kexec_buf *kbuf) kbuf->buf_align = max(kbuf->buf_align, PAGE_SIZE); /* Walk the RAM ranges and allocate a suitable range for the buffer */ - ret = kexec_locate_mem_hole(kbuf); + ret = arch_kexec_locate_mem_hole(kbuf); if (ret) return ret; |