From: Xianting Tian Date: Wed, 26 Oct 2022 14:42:08 +0000 (+0800) Subject: Documentation: kdump: describe VMCOREINFO export for RISCV64 X-Git-Tag: v6.6.7~3898^2~18^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c5b4216929ebc8ac9107a373db65babc14ba4e80;p=platform%2Fkernel%2Flinux-starfive.git 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 Signed-off-by: Xianting Tian Acked-by: Baoquan He Link: https://lore.kernel.org/r/20221026144208.373504-3-xianting.tian@linux.alibaba.com [Palmer: wrap commit text] Signed-off-by: Palmer Dabbelt --- diff --git a/Documentation/admin-guide/kdump/vmcoreinfo.rst b/Documentation/admin-guide/kdump/vmcoreinfo.rst index 6726f43..86fd884 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