From: Haiqing Bai <haiqing....@windriver.com>
When "CONFIG_ARM_LPAE" is enabled,3 level page table
is used by MMU, the "SECTION_SIZE" is defined with
(1 << 21), but 'add_buffer_phys_virt()' hardcode this
to (1 << 20).
Suggested-By: fredrik.markst...@gmail.com
Signed-off-by: Haiqing Bai <haiqing....@windriver.com>
Signed-off-by: Alexander Kanavin <a...@linutronix.de>
---
kexec/arch/arm/crashdump-arm.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/kexec/arch/arm/crashdump-arm.c b/kexec/arch/arm/crashdump-arm.c
index 1ec1826..cc20f63 100644
--- a/kexec/arch/arm/crashdump-arm.c
+++ b/kexec/arch/arm/crashdump-arm.c
@@ -242,6 +242,7 @@ int load_crashdump_segments(struct kexec_info *info, char
*mod_cmdline)
void *buf;
int err;
int last_ranges;
+ unsigned short align_bit_shift = 20;
/*
* First fetch all the memory (RAM) ranges that we are going to pass to
@@ -283,6 +284,7 @@ int load_crashdump_segments(struct kexec_info *info, char
*mod_cmdline)
/* for support LPAE enabled kernel*/
elf_info.class = ELFCLASS64;
+ align_bit_shift = 21;
err = crash_create_elf64_headers(info, &elf_info,
usablemem_rgns.ranges,
@@ -304,8 +306,9 @@ int load_crashdump_segments(struct kexec_info *info, char
*mod_cmdline)
* 1MB) so that available memory passed in kernel command line will be
* aligned to 1MB. This is because kernel create_mapping() wants memory
* regions to be aligned to SECTION_SIZE.
+ * The SECTION_SIZE of LPAE kernel is '1UL << 21' defined in
pgtable-3level.h
*/
- elfcorehdr = add_buffer_phys_virt(info, buf, bufsz, bufsz, 1 << 20,
+ elfcorehdr = add_buffer_phys_virt(info, buf, bufsz, bufsz, 1 <<
align_bit_shift,
crash_kernel_mem.start,
crash_kernel_mem.end, -1, 0);
--
2.39.2
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