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| author | Xianting Tian <xianting.tian@linux.alibaba.com> | 2022-10-26 17:42:08 +0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2022-12-03 03:48:58 +0300 |
| commit | c5b4216929ebc8ac9107a373db65babc14ba4e80 (patch) | |
| tree | 8c155c007fdc9842c7cb9d2fb3030f090b03b41c /Documentation/admin-guide | |
| parent | 649d6b1019a2f243bc3a98cb85902a8ebf74289a (diff) | |
| download | linux-c5b4216929ebc8ac9107a373db65babc14ba4e80.tar.xz | |
Documentation: kdump: describe VMCOREINFO export for RISCV64
The following interrelated definitions and ranges are needed by the
kdump crash tool, which are exported by
"arch/riscv/kernel/crash_core.c":
VA_BITS,
PAGE_OFFSET,
phys_ram_base,
KERNEL_LINK_ADDR,
MODULES_VADDR ~ MODULES_END,
VMALLOC_START ~ VMALLOC_END,
VMEMMAP_START ~ VMEMMAP_END,
Document these RISCV64 exports above.
Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Xianting Tian <xianting.tian@linux.alibaba.com>
Acked-by: Baoquan He <bhe@redhat.com>
Link: https://lore.kernel.org/r/20221026144208.373504-3-xianting.tian@linux.alibaba.com
[Palmer: wrap commit text]
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'Documentation/admin-guide')
| -rw-r--r-- | Documentation/admin-guide/kdump/vmcoreinfo.rst | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kdump/vmcoreinfo.rst b/Documentation/admin-guide/kdump/vmcoreinfo.rst index 6726f439958c..86fd88492870 100644 --- a/Documentation/admin-guide/kdump/vmcoreinfo.rst +++ b/Documentation/admin-guide/kdump/vmcoreinfo.rst @@ -595,3 +595,32 @@ X2TLB ----- Indicates whether the crashed kernel enabled SH extended mode. + +RISCV64 +======= + +VA_BITS +------- + +The maximum number of bits for virtual addresses. Used to compute the +virtual memory ranges. + +PAGE_OFFSET +----------- + +Indicates the virtual kernel start address of the direct-mapped RAM region. + +phys_ram_base +------------- + +Indicates the start physical RAM address. + +MODULES_VADDR|MODULES_END|VMALLOC_START|VMALLOC_END|VMEMMAP_START|VMEMMAP_END|KERNEL_LINK_ADDR +---------------------------------------------------------------------------------------------- + +Used to get the correct ranges: + + * MODULES_VADDR ~ MODULES_END : Kernel module space. + * VMALLOC_START ~ VMALLOC_END : vmalloc() / ioremap() space. + * VMEMMAP_START ~ VMEMMAP_END : vmemmap space, used for struct page array. + * KERNEL_LINK_ADDR : start address of Kernel link and BPF |