diff options
| author | Hari Bathini <hbathini@linux.ibm.com> | 2024-11-07 11:28:16 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2024-11-10 22:33:52 +1100 |
| commit | f4892c68ecc1cf45e41a78820dd2eebccc945b66 (patch) | |
| tree | d9d7b9f779ea18c6533816c78116a1299d2c2409 /arch/powerpc/include | |
| parent | cfec8463d9a19ec043845525fe5fd675e59a8aab (diff) | |
powerpc/fadump: allocate memory for additional parameters early
Memory for passing additional parameters to fadump capture kernel
is allocated during subsys_initcall level, using memblock. But
as slab is already available by this time, allocation happens via
the buddy allocator. This may work for radix MMU but is likely to
fail in most cases for hash MMU as hash MMU needs this memory in
the first memory block for it to be accessible in real mode in the
capture kernel (second boot). So, allocate memory for additional
parameters area as soon as MMU mode is obvious.
Fixes: 683eab94da75 ("powerpc/fadump: setup additional parameters for dump capture kernel")
Reported-by: Venkat Rao Bagalkote <venkat88@linux.vnet.ibm.com>
Closes: https://lore.kernel.org/lkml/a70e4064-a040-447b-8556-1fd02f19383d@linux.vnet.ibm.com/T/#u
Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com>
Tested-by: Venkat Rao Bagalkote <venkat88@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://patch.msgid.link/20241107055817.489795-1-sourabhjain@linux.ibm.com
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/fadump.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/fadump.h b/arch/powerpc/include/asm/fadump.h index 3638f04447f5..a48f54dde4f6 100644 --- a/arch/powerpc/include/asm/fadump.h +++ b/arch/powerpc/include/asm/fadump.h @@ -19,6 +19,7 @@ extern int is_fadump_active(void); extern int should_fadump_crash(void); extern void crash_fadump(struct pt_regs *, const char *); extern void fadump_cleanup(void); +void fadump_setup_param_area(void); extern void fadump_append_bootargs(void); #else /* CONFIG_FA_DUMP */ @@ -26,6 +27,7 @@ static inline int is_fadump_active(void) { return 0; } static inline int should_fadump_crash(void) { return 0; } static inline void crash_fadump(struct pt_regs *regs, const char *str) { } static inline void fadump_cleanup(void) { } +static inline void fadump_setup_param_area(void) { } static inline void fadump_append_bootargs(void) { } #endif /* !CONFIG_FA_DUMP */ |