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Wed, 29 Apr 2026 00:00:22 -0700 (PDT) From: Chen Wandun X-Google-Original-From: Chen Wandun To: kexec@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linux-riscv@lists.infradead.org, devicetree@vger.kernel.org Cc: akpm@linux-foundation.org, bhe@redhat.com, rppt@kernel.org, pasha.tatashin@soleen.com, pratyush@kernel.org, ruirui.yang@linux.dev, corbet@lwn.net, skhan@linuxfoundation.org, catalin.marinas@arm.com, will@kernel.org, chenhuacai@kernel.org, kernel@xen0n.name, pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu, robh@kernel.org, saravanak@kernel.org, chenwandun@lixiang.com, zhaomeijing@lixiang.com, everyzhao@126.com Subject: [PATCH 10/11] loongarch: kdump: exclude no-dump reserved memory regions from vmcore Date: Wed, 29 Apr 2026 14:58:30 +0800 Message-ID: <20260429065831.1510858-11-chenwandun@lixiang.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260429065831.1510858-1-chenwandun@lixiang.com> References: <20260429065831.1510858-1-chenwandun@lixiang.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Apply the same no-dump reserved memory filtering to LoongArch kdump as was done for arm64. Use of_reserved_mem_exclude_no_dump() to drop flagged regions from the elfcorehdr PT_LOAD segments, and of_reserved_mem_no_dump_nr_ranges() to pre-size the crash_mem array. Signed-off-by: Chen Wandun --- 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..742fb9affcb9 100644 --- a/arch/loongarch/kernel/machine_kexec_file.c +++ b/arch/loongarch/kernel/machine_kexec_file.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include @@ -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_no_dump_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_exclude_no_dump(cmem); + if (ret < 0) + goto out; + ret = crash_prepare_elf64_headers(cmem, true, addr, sz); out: -- 2.43.0