From patchwork Fri Aug 2 09:25:10 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jinjie Ruan X-Patchwork-Id: 13751343 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7BFCDC3DA4A for ; Fri, 2 Aug 2024 09:22:18 +0000 (UTC) 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-Type: Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC: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=4TRZ40sXWO15LnJU6TH3kBvoW+7yhv2d3kWTgHAvYbA=; b=DFHIawNB9iZxGLAXpN4/aWaAfw TKc1IRPPkida3Wg2SPFIRveupv3m3SkTkh6z0CDUBTIJs50Ts66Byv2mv9NxEGsqFC/VUV3M5YwGt NjaRurOtWDjFpvchZveU2JE60SEiyiIKOSZAun23mh7uQimt6svsVi7a/lIoro7M2CUjBsfXmzJTM 8yeCqcSlovaVOjZBNNyjYYfnQiMA129+fyu8pKd4iKeNKE+L2hBFmhBsBP/zIdVXUYDM5wt1JXT86 eUsDmEtU1Y+gSPHXVmo7AYCYY9dV5KT+aBkGN6s1s2xn5P7eKqHh4pg0jrmNWzftcDAoM73x2e7p6 yqr/AyYQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sZoUD-00000008GA8-0rtn; Fri, 02 Aug 2024 09:22:09 +0000 Received: from szxga02-in.huawei.com ([45.249.212.188]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sZoRS-00000008FQ4-2hzi for linux-arm-kernel@lists.infradead.org; Fri, 02 Aug 2024 09:19:20 +0000 Received: from mail.maildlp.com (unknown [172.19.162.254]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4Wb0bQ3KtkzfZFj; Fri, 2 Aug 2024 17:17:22 +0800 (CST) Received: from kwepemi100008.china.huawei.com (unknown [7.221.188.57]) by mail.maildlp.com (Postfix) with ESMTPS id DD02D180101; Fri, 2 Aug 2024 17:19:13 +0800 (CST) Received: from huawei.com (10.90.53.73) by kwepemi100008.china.huawei.com (7.221.188.57) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Fri, 2 Aug 2024 17:19:13 +0800 From: Jinjie Ruan To: , , , , CC: Subject: [RFC PATCH] ARM: Support allocating crashkernel above 4G for LPAE Date: Fri, 2 Aug 2024 17:25:10 +0800 Message-ID: <20240802092510.3915986-1-ruanjinjie@huawei.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Originating-IP: [10.90.53.73] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To kwepemi100008.china.huawei.com (7.221.188.57) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240802_021918_874594_D1D69E77 X-CRM114-Status: UNSURE ( 7.78 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org As ARM LPAE feature support accessing memory beyond the 4G limit, define HAVE_ARCH_CRASHKERNEL_RESERVATION_HIGH macro to support reserving crash memory above 4G for ARM32 LPAE. No test because there is no LPAE ARM32 hardware. Signed-off-by: Jinjie Ruan --- arch/arm/include/asm/crash_reserve.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/arm/include/asm/crash_reserve.h b/arch/arm/include/asm/crash_reserve.h index 85c9298bd3b7..33a2f18b0ec1 100644 --- a/arch/arm/include/asm/crash_reserve.h +++ b/arch/arm/include/asm/crash_reserve.h @@ -19,6 +19,10 @@ static inline unsigned long crash_addr_low_max(void) return (crash_max > lowmem_max) ? lowmem_max : crash_max; } - #define HAVE_ARCH_ADD_CRASH_RES_TO_IOMEM_EARLY + +#if defined(CONFIG_ARM_LPAE) && defined(CONFIG_HIGHMEM) +#define HAVE_ARCH_CRASHKERNEL_RESERVATION_HIGH +#endif + #endif