53 lines
1.9 KiB
Diff
53 lines
1.9 KiB
Diff
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From 78e497fb69950665e639cfab8f4fb50cc404a1eb Mon Sep 17 00:00:00 2001
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From: Haiqing Bai <Haiqing.Bai@windriver.com>
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Date: Mon, 9 Jan 2017 15:26:29 +0800
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Subject: [PATCH] kexec: ARM: Fix add_buffer_phys_virt() align issue
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When "CONFIG_ARM_LPAE" is enabled,3 level page table
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is used by MMU, the "SECTION_SIZE" is defined with
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(1 << 21), but 'add_buffer_phys_virt()' hardcode this
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to (1 << 20).
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Upstream-Status: Pending
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Suggested-By:fredrik.markstrom@gmail.com
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Signed-off-by: Haiqing Bai <Haiqing.Bai@windriver.com>
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---
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kexec/arch/arm/crashdump-arm.c | 5 ++++-
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1 file changed, 4 insertions(+), 1 deletion(-)
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diff --git a/kexec/arch/arm/crashdump-arm.c b/kexec/arch/arm/crashdump-arm.c
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index 245c21a..12139c3 100644
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--- a/kexec/arch/arm/crashdump-arm.c
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+++ b/kexec/arch/arm/crashdump-arm.c
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@@ -240,6 +240,7 @@ int load_crashdump_segments(struct kexec_info *info, char *mod_cmdline)
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void *buf;
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int err;
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int last_ranges;
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+ unsigned short align_bit_shift = 20;
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/*
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* First fetch all the memory (RAM) ranges that we are going to pass to
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@@ -281,6 +282,7 @@ int load_crashdump_segments(struct kexec_info *info, char *mod_cmdline)
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/* for support LPAE enabled kernel*/
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elf_info.class = ELFCLASS64;
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+ align_bit_shift = 21;
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err = crash_create_elf64_headers(info, &elf_info,
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usablemem_rgns.ranges,
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@@ -302,8 +304,9 @@ int load_crashdump_segments(struct kexec_info *info, char *mod_cmdline)
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* 1MB) so that available memory passed in kernel command line will be
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* aligned to 1MB. This is because kernel create_mapping() wants memory
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* regions to be aligned to SECTION_SIZE.
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+ * The SECTION_SIZE of LPAE kernel is '1UL << 21' defined in pgtable-3level.h
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*/
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- elfcorehdr = add_buffer_phys_virt(info, buf, bufsz, bufsz, 1 << 20,
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+ elfcorehdr = add_buffer_phys_virt(info, buf, bufsz, bufsz, 1 << align_bit_shift,
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crash_kernel_mem.start,
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crash_kernel_mem.end, -1, 0);
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--
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1.9.1
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