From: Wandun Chen <chenwandun1@gmail.com>
To: chenhuacai@kernel.org, kernel@xen0n.name, pjw@kernel.org,
palmer@dabbelt.com, aou@eecs.berkeley.edu, robh@kernel.org,
saravanak@kernel.org, bhe@redhat.com, rppt@kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, loongarch@lists.linux.dev,
linux-riscv@lists.infradead.org, devicetree@vger.kernel.org,
kexec@lists.infradead.org, iommu@lists.linux.dev,
zhaomeijing@lixiang.com
Cc: catalin.marinas@arm.com, will@kernel.org, alex@ghiti.fr,
akpm@linux-foundation.org, pasha.tatashin@soleen.com,
pratyush@kernel.org, ruirui.yang@linux.dev,
m.szyprowski@samsung.com, robin.murphy@arm.com
Subject: [PATCH v4 10/10] loongarch: kdump: exclude non-dumpable reserved memory regions from vmcore
Date: Tue, 30 Jun 2026 15:47:14 +0800 [thread overview]
Message-ID: <20260630074715.4126796-11-chenwandun1@gmail.com> (raw)
In-Reply-To: <20260630074715.4126796-1-chenwandun1@gmail.com>
From: Wandun Chen <chenwandun@lixiang.com>
Apply the same non-dumpable reserved memory filtering to LoongArch
kdump as was done for arm64. Use of_reserved_mem_kdump_exclude() to
drop flagged regions from the elfcorehdr PT_LOAD segments, and
of_reserved_mem_kdump_nr_ranges() to pre-size the crash_mem array.
Signed-off-by: Wandun Chen <chenwandun@lixiang.com>
---
arch/loongarch/kernel/machine_kexec_file.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/loongarch/kernel/machine_kexec_file.c b/arch/loongarch/kernel/machine_kexec_file.c
index 5584b798ba46..4b918c3d4a28 100644
--- a/arch/loongarch/kernel/machine_kexec_file.c
+++ b/arch/loongarch/kernel/machine_kexec_file.c
@@ -14,6 +14,7 @@
#include <linux/kernel.h>
#include <linux/kexec.h>
#include <linux/memblock.h>
+#include <linux/of_reserved_mem.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/types.h>
@@ -67,6 +68,7 @@ static int prepare_elf_headers(void **addr, unsigned long *sz)
nr_ranges = 2; /* for exclusion of crashkernel region */
for_each_mem_range(i, &start, &end)
nr_ranges++;
+ nr_ranges += of_reserved_mem_kdump_nr_ranges();
cmem = kmalloc_flex(*cmem, ranges, nr_ranges);
if (!cmem)
@@ -91,6 +93,10 @@ static int prepare_elf_headers(void **addr, unsigned long *sz)
goto out;
}
+ ret = of_reserved_mem_kdump_exclude(cmem);
+ if (ret)
+ goto out;
+
ret = crash_prepare_elf64_headers(cmem, true, addr, sz);
out:
--
2.43.0
_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv
next prev parent reply other threads:[~2026-06-30 7:49 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-30 7:47 [PATCH v4 00/10] kdump: reduce vmcore size and capture time Wandun Chen
2026-06-30 7:47 ` [PATCH v4 01/10] kexec/crash: provide crash_exclude_mem_range() stub when CONFIG_CRASH_DUMP=n Wandun Chen
2026-06-30 11:05 ` Pratyush Yadav
2026-06-30 7:47 ` [PATCH v4 02/10] of: reserved_mem: dedup and relocate reserved-memory messages Wandun Chen
2026-06-30 7:47 ` [PATCH v4 03/10] of: reserved_mem: skip late scan when no regions are reserved Wandun Chen
2026-06-30 7:47 ` [PATCH v4 04/10] of: reserved_mem: split alloc_reserved_mem_array() from fdt_scan_reserved_mem_late() Wandun Chen
2026-06-30 7:47 ` [PATCH v4 05/10] of: reserved_mem: add dumpable flag to opt-in vmcore Wandun Chen
2026-06-30 7:47 ` [PATCH v4 06/10] of: reserved_mem: save /memreserve/ entries into the reserved_mem array Wandun Chen
2026-06-30 7:47 ` [PATCH v4 07/10] of: reserved_mem: add kdump helpers to exclude non-dumpable regions Wandun Chen
2026-06-30 11:06 ` Pratyush Yadav
2026-06-30 7:47 ` [PATCH v4 08/10] arm64: kdump: exclude non-dumpable reserved memory regions from vmcore Wandun Chen
2026-06-30 11:06 ` Pratyush Yadav
2026-06-30 7:47 ` [PATCH v4 09/10] riscv: " Wandun Chen
2026-06-30 11:12 ` Pratyush Yadav
2026-06-30 12:00 ` Wandun
2026-06-30 7:47 ` Wandun Chen [this message]
2026-06-30 11:13 ` [PATCH v4 10/10] loongarch: " Pratyush Yadav
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260630074715.4126796-11-chenwandun1@gmail.com \
--to=chenwandun1@gmail.com \
--cc=akpm@linux-foundation.org \
--cc=alex@ghiti.fr \
--cc=aou@eecs.berkeley.edu \
--cc=bhe@redhat.com \
--cc=catalin.marinas@arm.com \
--cc=chenhuacai@kernel.org \
--cc=devicetree@vger.kernel.org \
--cc=iommu@lists.linux.dev \
--cc=kernel@xen0n.name \
--cc=kexec@lists.infradead.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-riscv@lists.infradead.org \
--cc=loongarch@lists.linux.dev \
--cc=m.szyprowski@samsung.com \
--cc=palmer@dabbelt.com \
--cc=pasha.tatashin@soleen.com \
--cc=pjw@kernel.org \
--cc=pratyush@kernel.org \
--cc=robh@kernel.org \
--cc=robin.murphy@arm.com \
--cc=rppt@kernel.org \
--cc=ruirui.yang@linux.dev \
--cc=saravanak@kernel.org \
--cc=will@kernel.org \
--cc=zhaomeijing@lixiang.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox