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| author | Huang Shijie <shijie@os.amperecomputing.com> | 2022-02-09 09:26:42 +0000 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2022-03-07 21:25:47 +0000 |
| commit | 2369f171d5c5550b85ce96fd35d4438cf2e6b09e (patch) | |
| tree | c96c9d94249053d2f46c15520192a74bb3479974 | |
| parent | a8a733b20109fc85a5b2e0318cef036b2c818ac3 (diff) | |
| download | lwn-2369f171d5c5550b85ce96fd35d4438cf2e6b09e.tar.gz lwn-2369f171d5c5550b85ce96fd35d4438cf2e6b09e.zip | |
arm64: crash_core: Export MODULES, VMALLOC, and VMEMMAP ranges
The following interrelated ranges are needed by the kdump crash tool:
MODULES_VADDR ~ MODULES_END,
VMALLOC_START ~ VMALLOC_END,
VMEMMAP_START ~ VMEMMAP_END
Since these values change from time to time, it is preferable to export
them via vmcoreinfo than to change the crash's code frequently.
Signed-off-by: Huang Shijie <shijie@os.amperecomputing.com>
Link: https://lore.kernel.org/r/20220209092642.9181-1-shijie@os.amperecomputing.com
Signed-off-by: Will Deacon <will@kernel.org>
| -rw-r--r-- | Documentation/admin-guide/kdump/vmcoreinfo.rst | 8 | ||||
| -rw-r--r-- | arch/arm64/kernel/crash_core.c | 6 |
2 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kdump/vmcoreinfo.rst b/Documentation/admin-guide/kdump/vmcoreinfo.rst index 3861a25faae1..a339af45a22e 100644 --- a/Documentation/admin-guide/kdump/vmcoreinfo.rst +++ b/Documentation/admin-guide/kdump/vmcoreinfo.rst @@ -494,6 +494,14 @@ architecture which is used to lookup the page-tables for the Virtual addresses in the higher VA range (refer to ARMv8 ARM document for more details). +MODULES_VADDR|MODULES_END|VMALLOC_START|VMALLOC_END|VMEMMAP_START|VMEMMAP_END +------------- + +Used to get the correct ranges: + MODULES_VADDR ~ MODULES_END-1 : Kernel module space. + VMALLOC_START ~ VMALLOC_END-1 : vmalloc() / ioremap() space. + VMEMMAP_START ~ VMEMMAP_END-1 : vmemmap region, used for struct page array. + arm === diff --git a/arch/arm64/kernel/crash_core.c b/arch/arm64/kernel/crash_core.c index 314391a156ee..2b65aae332ce 100644 --- a/arch/arm64/kernel/crash_core.c +++ b/arch/arm64/kernel/crash_core.c @@ -20,6 +20,12 @@ void arch_crash_save_vmcoreinfo(void) { VMCOREINFO_NUMBER(VA_BITS); /* Please note VMCOREINFO_NUMBER() uses "%d", not "%x" */ + vmcoreinfo_append_str("NUMBER(MODULES_VADDR)=0x%lx\n", MODULES_VADDR); + vmcoreinfo_append_str("NUMBER(MODULES_END)=0x%lx\n", MODULES_END); + vmcoreinfo_append_str("NUMBER(VMALLOC_START)=0x%lx\n", VMALLOC_START); + vmcoreinfo_append_str("NUMBER(VMALLOC_END)=0x%lx\n", VMALLOC_END); + vmcoreinfo_append_str("NUMBER(VMEMMAP_START)=0x%lx\n", VMEMMAP_START); + vmcoreinfo_append_str("NUMBER(VMEMMAP_END)=0x%lx\n", VMEMMAP_END); vmcoreinfo_append_str("NUMBER(kimage_voffset)=0x%llx\n", kimage_voffset); vmcoreinfo_append_str("NUMBER(PHYS_OFFSET)=0x%llx\n", |