From patchwork Tue Apr 16 11:35:15 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: chenzhou X-Patchwork-Id: 10902761 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 610E61515 for ; Tue, 16 Apr 2019 11:25:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4446D27165 for ; Tue, 16 Apr 2019 11:25:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 373F027853; Tue, 16 Apr 2019 11:25:05 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id D6E7F27165 for ; Tue, 16 Apr 2019 11:25:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=CusqiczXsl3R8uSljvYp0z0Viq8inhYExrLaFzg1LiA=; b=bJtjw8kapBOPQv eCz3nik8c9Q2YfX86lCEAnFR4IeQDFts7O9xTyJsbj04G/zNtT6Pd8W4Wb222YzzLLi+z6c+GYjKZ hehJ+Su9lE5suMNPSTRRr+TeelOoPfZqe2YfVChtwn4LCnBMvDqgLrwowrq2bY+bGDSxsFlJyKyp9 3VuV055GGNv0k/1U/vfAcJLZXabbA5Zr/BDyTr2nazYEXPuj6BGYLJfm9Rg1kcI53+9nLWNaPTWdh Za3317YQSolLXPkVB9GgTcLmbEEOTIA+Y2es23hWXxlfGrOYl0vCjHQIg9LJHiQzZIT5Xz8pCBRvW Az0iDKIyZvxlj4hb236g==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hGMCx-0005CK-2Q; Tue, 16 Apr 2019 11:24:59 +0000 Received: from szxga06-in.huawei.com ([45.249.212.32] helo=huawei.com) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hGMCs-0005AI-TZ; Tue, 16 Apr 2019 11:24:56 +0000 Received: from DGGEMS413-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 3EB6F6BD1735FA38CE48; Tue, 16 Apr 2019 19:24:49 +0800 (CST) Received: from localhost.localdomain.localdomain (10.175.113.25) by DGGEMS413-HUB.china.huawei.com (10.3.19.213) with Microsoft SMTP Server id 14.3.408.0; Tue, 16 Apr 2019 19:24:40 +0800 From: Chen Zhou To: , , , , , , , , Subject: [RESEND PATCH v5 0/4] support reserving crashkernel above 4G on arm64 kdump Date: Tue, 16 Apr 2019 19:35:15 +0800 Message-ID: <20190416113519.90507-1-chenzhou10@huawei.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-Originating-IP: [10.175.113.25] X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190416_042455_130237_27DD9B9C X-CRM114-Status: UNSURE ( 8.37 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: wangkefeng.wang@huawei.com, linux-mm@kvack.org, Chen Zhou , kexec@lists.infradead.org, linux-kernel@vger.kernel.org, takahiro.akashi@linaro.org, horms@verge.net.au, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP When crashkernel is reserved above 4G in memory, kernel should reserve some amount of low memory for swiotlb and some DMA buffers. So there may be two crash kernel regions, one is below 4G, the other is above 4G. Crash dump kernel reads more than one crash kernel regions via a dtb property under node /chosen, linux,usable-memory-range = . Besides, we need to modify kexec-tools: arm64: support more than one crash kernel regions(see [1]) Changes since [v4] - reimplement memblock_cap_memory_ranges for multiple ranges by Mike. Changes since [v3] - Add memblock_cap_memory_ranges for multiple ranges. - Split patch "arm64: kdump: support more than one crash kernel regions" as two. One is above "Add memblock_cap_memory_ranges", the other is using memblock_cap_memory_ranges to support multiple crash kernel regions. - Fix some compiling warnings. Changes since [v2] - Split patch "arm64: kdump: support reserving crashkernel above 4G" as two. Put "move reserve_crashkernel_low() into kexec_core.c" in a separate patch. Changes since [v1]: - Move common reserve_crashkernel_low() code into kernel/kexec_core.c. - Remove memblock_cap_memory_ranges() i added in v1 and implement that in fdt_enforce_memory_region(). There are at most two crash kernel regions, for two crash kernel regions case, we cap the memory range [min(regs[*].start), max(regs[*].end)] and then remove the memory range in the middle. [1]: http://lists.infradead.org/pipermail/kexec/2019-April/022792.html [v1]: https://lkml.org/lkml/2019/4/8/628 [v2]: https://lkml.org/lkml/2019/4/9/86 [v3]: https://lkml.org/lkml/2019/4/15/6 [v4]: https://lkml.org/lkml/2019/4/15/273 Chen Zhou (3): x86: kdump: move reserve_crashkernel_low() into kexec_core.c arm64: kdump: support reserving crashkernel above 4G kdump: update Documentation about crashkernel on arm64 Mike Rapoport (1): memblock: extend memblock_cap_memory_range to multiple ranges Documentation/admin-guide/kernel-parameters.txt | 4 +- arch/arm64/include/asm/kexec.h | 3 ++ arch/arm64/kernel/setup.c | 3 ++ arch/arm64/mm/init.c | 59 ++++++++++++++++------ arch/x86/include/asm/kexec.h | 3 ++ arch/x86/kernel/setup.c | 66 +++---------------------- include/linux/kexec.h | 5 ++ include/linux/memblock.h | 2 +- kernel/kexec_core.c | 56 +++++++++++++++++++++ mm/memblock.c | 44 ++++++++--------- 10 files changed, 144 insertions(+), 101 deletions(-)