From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pz2-f7.google.com (mail-pz2-f7.google.com [74.125.228.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5EA153E5A31 for ; Wed, 2 Sep 2026 07:33:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.228.7 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788334400; cv=none; b=NMRmL2plAieXHsT/B1gaLh5DAOUM5YAoY+FN+vHPiqqiQBN2PY8YhYWqFoKcFHQEPTzQNAnlOZa7lSNs0TTN9RCwCE+YLa4kwks/XyGkpCrnFGravy9cyTXFchcFTpoBx8XfQJQgo1x2fC0uUrqdAYEMb4eidaqKs/6BQBVZZzo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788334400; c=relaxed/simple; bh=LdiDKcxoqOK6v7YCmPqCiMeNyxA1ek7PYiNAuO0m/sQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=fEHOrhq2ANvtBOZQKXVwIy3dhP+rLPUmmyGVPSFNDk6yocXrT5ISBuu8eClKO4VAtpl5Oswk7XbjisJEl4n0fULWNq0Cl3O0gOEftmIBSG0HvLmI7l2qNeCRjCRfocjscaJLwerglNQdDT9o2rx+CbturFf7Lg4pQVke3436NeA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=k1Uu0CaT; arc=none smtp.client-ip=74.125.228.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="k1Uu0CaT" Received: by mail-pz2-f7.google.com with SMTP id 41be03b00d2f7-cc1ddb3ba3eso440124a12.1 for ; Wed, 02 Sep 2026 00:33:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1788334397; x=1788939197; darn=vger.kernel.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=fTBZpbSvsidLVDHHiShy9f+wnGid6sRS2qRO19KqwKw=; b=k1Uu0CaTQQoNIKgE107gAXwujbBTJeuT6Ry5xh985OJF2njz5Zhxr3/0XAMn9Uw0SM LWEb07ukzcB1d1KewKWd8ppvsi+FyjRphUz1ZRa4c81LB7dnEN7+Ll2FGuFt3l4Yak0n 57lfBI9pEpIH1ZuEdH4uL3oN09GEg1sg7zo9xHO0uCG/iEwE1U+nsVeNDu2GF+qsJaLJ jZrtAy+JxQ3LDe+sHZa7Oqp7tWirdBAsJs1Td28y0V4e+vbXO2A6NwFPbvGdBa9rfJfq ddnBLuIFF5JwwnrP/UvC6aMLg4uE7p6EFflWn86mvuyFeNs1PHNoNXdq6TcF3sBWLKy5 SotQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788334397; x=1788939197; 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=fTBZpbSvsidLVDHHiShy9f+wnGid6sRS2qRO19KqwKw=; b=Bikvqx8olYelV8ZZOvPGwTD9G4SlMY2bUWq/f0/K9SSgeilTTv9MTFeKljXv/7WziD lsMfnbYXF3H7rY0okoSNbosfLmw1b9qb0AAp0DgwlQ2hju+3c+JW+FiNga/kquZE+bLt hK/ssIPuIEUKMfVpgnphwO8iLeArKo+WbCrxMwNqpsd9WBs/PnHVl9kcjllvdx2yNICX xqkyALtwU2u45m4azMvaQgvL7xEohHFpwuv/ozKmMu+KAI5+RboWIUM6gPenQL7xS/05 si4n3jwGburE5OpIIiIFcSVrbYx16b9VERH8Y986LcLYNMHMr5cPpQ8L57OPc0v98y/u Yv9A== X-Forwarded-Encrypted: i=1; AKwUvByErPTTwbOquExlZqw0PvIGh+zyZTvdIRMtS5OsFo3qba+4gJpr90LfasLQYh09z6/f9DwcmzbmrAkK@vger.kernel.org X-Gm-Message-State: AFuF++leieE/xnlKYwZJONiQN2yjt84MglSql9uVhSxf9hGBKOSo8Gy/ D8A0FUaRsgjQpHQUGbiHFMZ7LuhVbKr86KwaJvo0Ld1ERGS5dp6jmNf/ X-Gm-Gg: AYBFou0l5YrnYZ4+1XJ9Z1Tq0KQWohIAMgsEuhexUS9+al3vVuHrmqF95v03NZq6I/I TXKIq2pegCOMlR3BzUoxrU80uEk4XkjWTCJ4r/QKcFsv6EHz94CNAy4UW+3wgVcnl/mfl0ebwjA 2vUlWjjzL+SEvK2vObiedjHW1JyY5A3MrQt5rR/vfHArSaZlgMGLh9A4laVoem55d9p0Ah+ZNf8 8kUTC+d4omJ+PGUZid0kQz0wbaKRgbAQoo98LhT1DrWTlDON8cyXf/pQuaLrEJWWRJD12DNRfLG Wb+WeHMjPK3Wk47088IubTbIttnp/WlPrghzCnqMhFb6sdafMqvXpTw16JVGZeVuZPKxEFwj9Rs helQY6aCWuLlc3R1Gq74Ji8r9+B42ATtdNzsfi+i817lQM41ha7WfdxkxuKukeKEfg1OGJ+LrZ0 djs/WynzMfp+AiTsj//j7UgTNjCR3N79ZOt2OfGtpRd4NMigypP7LdMokKFlTqzYTBoMk/nrHGS Wto1BTyJa0= X-Received: by 2002:a05:6a00:4f83:b0:857:72f8:dc99 with SMTP id d2e1a72fcca58-85ed8fd714cmr4354975b3a.26.1788334396619; Wed, 02 Sep 2026 00:33:16 -0700 (PDT) Received: from intel.company.local ([122.11.210.25]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-85db2adcbedsm926914b3a.20.2026.09.02.00.33.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Sep 2026 00:33:14 -0700 (PDT) From: Wandun Chen To: catalin.marinas@arm.com, will@kernel.org, chenhuacai@kernel.org, pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu, tglx@kernel.org, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, robh@kernel.org, saravanak@kernel.org, akpm@linux-foundation.org, baoquan.he@linux.dev, rppt@kernel.org, pasha.tatashin@soleen.com, pratyush@kernel.org, m.szyprowski@samsung.com Cc: mark.rutland@arm.com, kernel@xen0n.name, alex@ghiti.fr, hpa@zytor.com, 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 v6 08/10] of: reserved_mem: mark /reserved-memory entries with MEMBLOCK_NODUMP Date: Wed, 2 Sep 2026 15:31:14 +0800 Message-ID: <20260902073116.802752-9-chenwandun1@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260902073116.802752-1-chenwandun1@gmail.com> References: <20260902073116.802752-1-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 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 so non-kdump kernels do not pay the cost of splitting memblock.memory entries at NODUMP boundaries. Signed-off-by: Wandun Chen Tested-by: Meijing Zhao --- drivers/of/fdt.c | 1 + drivers/of/of_private.h | 1 + drivers/of/of_reserved_mem.c | 15 +++++++++++++++ 3 files changed, 17 insertions(+) diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index a64afc3ded3d..286fd4db6312 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..f29a07e8fb23 100644 --- a/drivers/of/of_reserved_mem.c +++ b/drivers/of/of_reserved_mem.c @@ -677,6 +677,21 @@ 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; + + 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