From patchwork Sun Feb 27 13:47:24 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lecopzer Chen X-Patchwork-Id: 12761698 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 6B62FC433EF for ; Sun, 27 Feb 2022 13:49:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id: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=Hav53rz6yakCbMiq3JkZxXNMZmd9hxA10xe3bV6L/zc=; b=JnU0hd1i2+XVkj avMocMQoQFRrKun/9nxo5/Tlf2IZpk4AzeBeX8FQTgz0lkM8jhvraw3/F2U5wYAD9iap5QmvqLQek 7ZB6XFjNGTmVQckZQb1lFLBhWklwkLIrtl8YrHV5n9dtD8XLL/QQv/bOdVJTC1Ovn2nEVX7jlSFu2 5jKXMzCpF6zmgBgdEj1WWNHwEzto4VeysyHedg5+LIaqf4dQ9XlxbgWPZQMbU6iNcFDIyhrGD24Uf QKJDSkzbKK8IYeAkXue640YfITyUY0hGcgGauLaAO9I8dNsXQrAkUkc+MdfmW+74xIG3om1W5lkkX t7mR/a23mW7UbdnNsxzQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nOJuL-009H4R-IX; Sun, 27 Feb 2022 13:48:17 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nOJuE-009H46-0r for linux-arm-kernel@lists.infradead.org; Sun, 27 Feb 2022 13:48:12 +0000 X-UUID: 7d3c4c6dd3024203827cc879c1cb0592-20220227 X-UUID: 7d3c4c6dd3024203827cc879c1cb0592-20220227 Received: from mtkcas68.mediatek.inc [(172.29.94.19)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1850800210; Sun, 27 Feb 2022 06:48:03 -0700 Received: from mtkmbs10n1.mediatek.inc (172.21.101.34) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sun, 27 Feb 2022 05:48:01 -0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.15; Sun, 27 Feb 2022 21:48:00 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Sun, 27 Feb 2022 21:48:00 +0800 From: Lecopzer Chen To: , CC: , , , , , , , , , , , , , , , , , Subject: [PATCH v3 0/2] arm: kasan: support CONFIG_KASAN_VMALLOC Date: Sun, 27 Feb 2022 21:47:24 +0800 Message-ID: <20220227134726.27584-1-lecopzer.chen@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220227_054810_115957_2D551F1B X-CRM114-Status: UNSURE ( 9.65 ) 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 Since the framework of KASAN_VMALLOC is well-developed, It's easy to support for ARM that simply not to map shadow of VMALLOC area on kasan_init. Since the virtual address of vmalloc for Arm is also between MODULE_VADDR and 0x100000000 (ZONE_HIGHMEM), which means the shadow address has already included between KASAN_SHADOW_START and KASAN_SHADOW_END. Thus we need to change nothing for memory map of Arm. This can fix ARM_MODULE_PLTS with KASan, support KASan for higmem and provide the first step to support CONFIG_VMAP_STACK with Arm. Test on 1. Qemu with memory 2G and vmalloc=500M for 3G/1G mapping. 2. Qemu with memory 2G and vmalloc=500M for 3G/1G mapping + LPAE. 3. Qemu with memory 2G and vmalloc=500M for 2G/2G mapping. v3: rebase on 5.17-rc5. Add simple doc for "arm: kasan: support CONFIG_KASAN_VMALLOC" Tweak commit message. v2: rebase on 5.17-rc3 Lecopzer Chen (2): arm: kasan: support CONFIG_KASAN_VMALLOC arm: kconfig: fix MODULE_PLTS for KASAN with KASAN_VMALLOC arch/arm/Kconfig | 2 ++ arch/arm/include/asm/kasan_def.h | 11 ++++++++++- arch/arm/mm/kasan_init.c | 6 +++++- 3 files changed, 17 insertions(+), 2 deletions(-) Tested-by: Linus Walleij Reviewed-by: Linus Walleij