linux-kernel - [RESEND PATCH -fixes 2/2] Documentation: kdump: Add va_kernel_pa

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Message-Id: <20230724100917.309061-2-suagrfillet@gmail.com>
Date:   Mon, 24 Jul 2023 18:09:17 +0800
From:   Song Shuai <suagrfillet@...il.com>
To:     bhe@...hat.com, vgoyal@...hat.com, dyoung@...hat.com,
        corbet@....net, paul.walmsley@...ive.com, palmer@...belt.com,
        aou@...s.berkeley.edu, xianting.tian@...ux.alibaba.com,
        suagrfillet@...il.com, anup@...infault.org, robh@...nel.org,
        ajones@...tanamicro.com, alexghiti@...osinc.com,
        conor.dooley@...rochip.com
Cc:     kexec@...ts.infradead.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org
Subject: [RESEND PATCH -fixes 2/2] Documentation: kdump: Add va_kernel_pa_offset for RISCV64

RISC-V Linux exports "va_kernel_pa_offset" in vmcoreinfo to help
Crash-utility translate the kernel virtual address correctly.

Here adds the definition of "va_kernel_pa_offset".

Fixes: 3335068f8721 ("riscv: Use PUD/P4D/PGD pages for the linear mapping")
Link: https://lore.kernel.org/linux-riscv/20230724040649.220279-1-suagrfillet@gmail.com/
Signed-off-by: Song Shuai <suagrfillet@...il.com>
---
 Documentation/admin-guide/kdump/vmcoreinfo.rst | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/admin-guide/kdump/vmcoreinfo.rst b/Documentation/admin-guide/kdump/vmcoreinfo.rst
index c18d94fa6470..f8ebb63b6c5d 100644
--- a/Documentation/admin-guide/kdump/vmcoreinfo.rst
+++ b/Documentation/admin-guide/kdump/vmcoreinfo.rst
@@ -624,3 +624,9 @@ Used to get the correct ranges:
   * 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
+
+va_kernel_pa_offset
+-------------------
+
+Indicates the offset between the kernel virtual and physical mappings.
+Used to translate virtual to physical addresses.
-- 
2.20.1