| Message ID | 20230905183604.568996-3-hbathini@linux.ibm.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v2,1/3] powerpc/fadump: make is_fadump_active() visible for exporting vmcore | expand |
| Context | Check | Description |
|---|---|---|
| snowpatch_ozlabs/github-powerpc_ppctests | success | Successfully ran 8 jobs. |
| snowpatch_ozlabs/github-powerpc_selftests | success | Successfully ran 8 jobs. |
| snowpatch_ozlabs/github-powerpc_sparse | success | Successfully ran 4 jobs. |
| snowpatch_ozlabs/github-powerpc_kernel_qemu | success | Successfully ran 23 jobs. |
| snowpatch_ozlabs/github-powerpc_clang | success | Successfully ran 6 jobs. |
diff --git a/arch/powerpc/include/asm/kexec.h b/arch/powerpc/include/asm/kexec.h index b760ef459234..f0b9c3fd0618 100644 --- a/arch/powerpc/include/asm/kexec.h +++ b/arch/powerpc/include/asm/kexec.h @@ -101,6 +101,8 @@ void relocate_new_kernel(unsigned long indirection_page, unsigned long reboot_co void kexec_copy_flush(struct kimage *image); #if defined(CONFIG_CRASH_DUMP) +bool is_kdump_kernel(void); +#define is_kdump_kernel is_kdump_kernel #define is_fadump_active is_fadump_active #if defined(CONFIG_PPC_RTAS) void crash_free_reserved_phys_range(unsigned long begin, unsigned long end); diff --git a/arch/powerpc/kernel/crash_dump.c b/arch/powerpc/kernel/crash_dump.c index 9a3b85bfc83f..6d8e616ce3ce 100644 --- a/arch/powerpc/kernel/crash_dump.c +++ b/arch/powerpc/kernel/crash_dump.c @@ -92,6 +92,17 @@ ssize_t copy_oldmem_page(struct iov_iter *iter, unsigned long pfn, return csize; } +/* + * Return true only when kexec based kernel dump capturing method is used. + * This ensures all restritions applied for kdump case are not automatically + * applied for fadump case. + */ +bool is_kdump_kernel(void) +{ + return !is_fadump_active() && elfcorehdr_addr != ELFCORE_ADDR_MAX; +} +EXPORT_SYMBOL_GPL(is_kdump_kernel); + #ifdef CONFIG_PPC_RTAS /* * The crashkernel region will almost always overlap the RTAS region, so
Currently, is_kdump_kernel() returns true in crash dump capture kernel for both kdump and fadump crash dump capturing methods, as both these methods set elfcorehdr_addr. Some restrictions enforced for crash dump capture kernel, based on is_kdump_kernel(), are specifically meant for kdump case and not desirable for fadump - eg. IO queues restriction in device drivers. So, define is_kdump_kernel() to return false when f/w assisted dump is active. Signed-off-by: Hari Bathini <hbathini@linux.ibm.com> --- arch/powerpc/include/asm/kexec.h | 2 ++ arch/powerpc/kernel/crash_dump.c | 11 +++++++++++ 2 files changed, 13 insertions(+)