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[v5,2/5] powerpc/crash hp: update kimage_arch struct

Message ID 20220620070106.93141-3-sourabhjain@linux.ibm.com (mailing list archive)
State Changes Requested
Headers show
Series [v5,1/5] powerpc/kexec: make update_cpus_node non-static | expand

Commit Message

Sourabh Jain June 20, 2022, 7:01 a.m. UTC 
Once the kimage is prepared the only way to identify which kexec segment
holds FDT is by looping through all kexec segments. To avoid this a new
member "fdt_index" is added to kimage_arch struct. The new member holds
the index of FDT segment in the kexec segment array which gives direct
access to FDT segment.

The fdt_index will be populated during kexec load for both kexec_load
and kexec_file_load case.

Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com>
---
 arch/powerpc/include/asm/kexec.h | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/arch/powerpc/include/asm/kexec.h b/arch/powerpc/include/asm/kexec.h
index c8040c93b15a..9489e5ca93fb 100644
--- a/arch/powerpc/include/asm/kexec.h
+++ b/arch/powerpc/include/asm/kexec.h
@@ -106,6 +106,9 @@  extern const struct kexec_file_ops kexec_elf64_ops;
 struct kimage_arch {
 	struct crash_mem *exclude_ranges;
 
+#if defined(CONFIG_HOTPLUG_CPU)
+	int fdt_index;
+#endif
 	unsigned long backup_start;
 	void *backup_buf;
 	void *fdt;