From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 57CF6606A319 for ; Wed, 21 Oct 2026 08:32:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=Nv7bFi6B; dkim=fail reason="signature verification failed" (2048-bit key, unprotected) header.d=infradead.org header.i=@infradead.org header.a=rsa-sha256 header.s=desiato.20200630 header.b=VYrevuUS; dkim=pass (2048-bit key, unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20251104 header.b=XmGW3ZVF DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=gUG85+B7KqrDZpPXGb0QyiCfKe+tueHmqLD38rgeJ0Q=; b=Nv7bFi6BorgAJ/d2mginFKIWiP G0FCt7NsujOmlZu4XBG7OzncYDNjouRbsLvyL7uJThbq+yxY2fuFPYwe3jPWpq3l4PAYBZcmD6tnB krNDeH6eId1UzR3/Tg2/FmPylwPrBZEqQOKQITEXK8mfbCZAdK7dk8c1MgYhv39yw41WeZ0ZLW+Ip 2jzvLvDTE4+1Hgim7U2uvjh/FaTT97cf8W9N+SyepMP/aHK004uFzBiRA69zVjdnJ9lITgej7GwxE kJLBfHMddVq7u1eMrAawvpVyA/XJVLW1FRZ/VX0ruJmw4HhMIxn9vVCBFS9Ly2ODKKZkqoOVjPlkk kjZBOhmw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1xJRkJ-0000000BNOF-1MBX; Wed, 21 Oct 2026 08:32:27 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1xJRkI-0000000BNMJ-0CjE for linux-arm-kernel@bombadil.infradead.org; Wed, 21 Oct 2026 08:32:26 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Transfer-Encoding:MIME-Version :References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=gUG85+B7KqrDZpPXGb0QyiCfKe+tueHmqLD38rgeJ0Q=; b=VYrevuUSSlR6oMVk+0AFi39dFt WYr100PzLCEHDzF4WaPChXryfpEI3juSLo6d3Jglj1w5AeHqJrGBKqw06UD1+9kQGBUyNDARxuBN8 Ud7JUbWyCxg8z/fhp9HrSIGkmim6udH+lsQrhnGPBa/j4BUcqQGRMSPDigavoF9SfX2673ARuGfex n29kYQtAunEuILrDn062EREovdGxOOEjbi45O/pcRLwrkkLJvhlw8GxeZTtgoU/pGIIZt91BCijxo pJS4ta70Jcmp5A1vO6YexgYJzrHsAZ1inAV/nh4gc1VqAXVJQIozSN0IQVit3Af4lHjVk+TtriQ+N nmXhV4Ww==; Received: from mail-pz2-x07.google.com ([2607:f8b0:4864:3b::7]) by desiato.infradead.org with esmtps (Exim 4.99.5 #2 (Red Hat Linux)) id 1xJRkD-00000005bHv-2NCc for linux-arm-kernel@lists.infradead.org; Wed, 21 Oct 2026 08:32:24 +0000 Received: by mail-pz2-x07.google.com with SMTP id 41be03b00d2f7-cc7c286026aso155121a12.0 for ; Wed, 21 Oct 2026 01:32:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1792571539; x=1793176339; darn=lists.infradead.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=gUG85+B7KqrDZpPXGb0QyiCfKe+tueHmqLD38rgeJ0Q=; b=XmGW3ZVFrgzye0+AsPU8BKAONp3N4Fw8GwhB60TUlmPdr9IJnwy+zvdFde3kVgDIbh UZAhOYIm/C44cxeAVM7n3sckPgekeQMuEnFsNy/oHHTwsP9SXZ7nMRIFuArbcaj/FIPq REhUEy0yzlYythPQ3D7tM6/N/5b9+WqrOAqNRK/NtfH9cOw5t4wCCObqllDYD4lYeeeC MqCYmASR/gCHOL7YNdN9+w0+RK7FnsPtVD5TeRYj5We1L98y9aqA7xAUwkHTUf/+a9x8 hyJen3mkgWkjFvEIzoamgsE/gOJdiS7CIjZ+2dRW3OPCh0PDb//1bDn4RWwzACkR/sfa 6/0Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1792571539; x=1793176339; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=gUG85+B7KqrDZpPXGb0QyiCfKe+tueHmqLD38rgeJ0Q=; b=FYJeJ73js6XgX2z7qMjwU3VSs6syRLj+QyU1z78ouRrvlcCSBiOYLFgFb8Ihj7LLIQ hdQosb0ZwS7WgzQ+xwLEDfXz/pa52ibG/t4pQ9sGdKcHZJvRzt7kFuloFHWuvfZZxoiI 9NSJLokcJYb0bpwgUJXIuXsiuQtBNDbgTHbTpHb16EErH1EFf9QAPk3OL4CFzt64uV7h xzZzMYiiwVqP22YLfsNKKCsYaFnSR/s4fv3SZZzTt5irX+gZudgz2swRu85SAibYOPXo I+Xhve8zvy9AVLgqW67dtWc478wuk6r+lRvRAUKNgDaxDVr8S4Ryrijsa/Ipv0799OoH aMTg== X-Forwarded-Encrypted: i=1; AKwUvBzc9ngseRFkI5IIAPgASlgyn2QJ6c92a/+DGDhePOWqGc9/8dZHE3DL7KRVDgL3ClvNAbknwr+98tu6vIP4BZ+q@lists.infradead.org X-Gm-Message-State: AFq9FYLaBTz+YWphmXjDt1yerJtVYRUFhJ1cUv6OYIMg0Oo01UIoYegl HeEWw0QZLa97+skB8WwHTtQaBLDjGsDisJNJn1gUw7S0DhZ823Dx5xwN X-Gm-Gg: AYBFou233YglGOCdFyFvJlO+DuGEUUd1/0NhFE0+tKI865JTJ5GbDT/9TOK4q3vhFYK uUzrlP+E15KM2evFp9AO1RujcW5K55+Nd2Ns4UtcXJGLA40rvuhckqHyxqEgRQWCOwU0QEw154h OuKtz/yLX+S2o+FZdyOp0HFSludvNYrFJPocSiduHExTDPnoEr91v38gH/SHTmueXc/U/yBro1e e32/B6E3RddFqIIcd//hfJ9qTJ5BwkmmtkJ5MkzOylsgTXBGKt9t3y4TXfCSpRPgK6xcofy9Wh3 wo+L8SaskVBZEOTHNqKySyV/xom5J7PTcGyIkmip9mctNoRJ/VROTGZsoGzHz6ZuovNXC9xeW23 OqlM8zEIoDdhBFsMdyynjJJSo8qv22/saNdRRHDHU51vofmfYv+Rfa9LMQ4ljE2+WEdz+//+bL1 NHj5+yOz77J/bdVHg62gz9uMcOT5kBqqG8BaQYm+P/RzV5COg771J88hPa98mTATiHx5onMqt0F xYX3UggJ8rtqiLCOM3eUNVn0ROIkKZ05zJR2sFzaxTMkPytXZj1wrJ5pkoIkLsp9CMi X-Received: by 2002:a05:6a00:a0e:b0:8a0:1435:fda0 with SMTP id d2e1a72fcca58-8a089d4702cmr1201474b3a.51.1792571538862; Wed, 21 Oct 2026 01:32:18 -0700 (PDT) Received: from intel.company.local ([122.11.210.25]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-8a0895e273bsm600653b3a.41.2026.10.21.01.31.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Oct 2026 01:32:09 -0700 (PDT) From: Wandun Chen To: robh@kernel.org, baoquan.he@linux.dev, rppt@kernel.org, m.szyprowski@samsung.com Cc: catalin.marinas@arm.com, will@kernel.org, mark.rutland@arm.com, chenhuacai@kernel.org, kernel@xen0n.name, pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr, tglx@kernel.org, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, saravanak@kernel.org, akpm@linux-foundation.org, pasha.tatashin@soleen.com, pratyush@kernel.org, ruirui.yang@linux.dev, robin.murphy@arm.com, 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, linux-mm@kvack.org, iommu@lists.linux.dev Subject: [PATCH v9 7/8] of: reserved_mem: mark /reserved-memory entries with MEMBLOCK_NODUMP Date: Wed, 21 Oct 2026 16:30:10 +0800 Message-ID: <20261021083011.2170525-8-chenwandun1@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261021083011.2170525-1-chenwandun1@gmail.com> References: <20261021083011.2170525-1-chenwandun1@gmail.com> X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261021_093221_840306_B2ABD9DD X-CRM114-Status: GOOD ( 15.86 ) X-Spam-Score: 0.1 (/) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 From: Wandun Chen Mark non-dumpable reserved-memory regions with MEMBLOCK_NODUMP so kdump can omit them from the vmcore. The marking is guarded by CONFIG_CRASH_DUMP and either CONFIG_KEXEC_FILE or CONFIG_CRASH_HOTPLUG, so kernels that do not build or update crash ELF headers do not pay the cost of splitting memblock.memory entries at NODUMP boundaries. Signed-off-by: Wandun Chen Tested-by: Meijing Zhao Acked-by: Marek Szyprowski Reviewed-by: Rob Herring (Arm) --- drivers/of/fdt.c | 1 + drivers/of/of_private.h | 1 + drivers/of/of_reserved_mem.c | 18 ++++++++++++++++++ 3 files changed, 20 insertions(+) diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index ecc923102622..a5f223a74b7e 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -1285,6 +1285,7 @@ void __init unflatten_device_tree(void) /* Save the statically-placed regions in the reserved_mem array */ fdt_scan_reserved_mem_late(); + fdt_mark_reserve_mem_nodump(); /* Populate an empty root node when bootloader doesn't provide one */ if (!fdt) { diff --git a/drivers/of/of_private.h b/drivers/of/of_private.h index 0ae16da066e2..505735732c13 100644 --- a/drivers/of/of_private.h +++ b/drivers/of/of_private.h @@ -187,6 +187,7 @@ static inline struct device_node *__of_get_dma_parent(const struct device_node * int fdt_scan_reserved_mem(void); void __init fdt_scan_reserved_mem_late(void); +void __init fdt_mark_reserve_mem_nodump(void); bool of_fdt_device_is_available(const void *blob, unsigned long node); diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c index 8c9d6395d6a3..db2bf76000d2 100644 --- a/drivers/of/of_reserved_mem.c +++ b/drivers/of/of_reserved_mem.c @@ -677,6 +677,24 @@ static void __init fdt_init_reserved_mem_node(unsigned long node, const char *un reserved_mem_count++; } +void __init fdt_mark_reserve_mem_nodump(void) +{ + struct reserved_mem *rmem; + int i; + + if (!IS_ENABLED(CONFIG_CRASH_DUMP)) + return; + + if (!IS_ENABLED(CONFIG_KEXEC_FILE) && !IS_ENABLED(CONFIG_CRASH_HOTPLUG)) + return; + + for (i = 0; i < reserved_mem_count; i++) { + rmem = &reserved_mem[i]; + if (rmem->size && !rmem->dumpable) + memblock_mark_nodump(rmem->base, rmem->size); + } +} + struct rmem_assigned_device { struct device *dev; struct reserved_mem *rmem; -- 2.43.0