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Tue, 30 Jun 2026 00:49:10 -0700 (PDT) From: Wandun Chen 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 Message-ID: <20260630074715.4126796-11-chenwandun1@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260630074715.4126796-1-chenwandun1@gmail.com> References: <20260630074715.4126796-1-chenwandun1@gmail.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Wandun Chen 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 --- 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 #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_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