From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3942AC433E2 for ; Wed, 24 Mar 2021 04:06:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0E8BB619F1 for ; Wed, 24 Mar 2021 04:06:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231185AbhCXEGA (ORCPT ); Wed, 24 Mar 2021 00:06:00 -0400 Received: from mailgw01.mediatek.com ([210.61.82.183]:33263 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S229957AbhCXEFi (ORCPT ); Wed, 24 Mar 2021 00:05:38 -0400 X-UUID: e34170eaa28946bdbf56de68a9d3745c-20210324 X-UUID: e34170eaa28946bdbf56de68a9d3745c-20210324 Received: from mtkexhb02.mediatek.inc [(172.21.101.103)] by mailgw01.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.14 Build 0819 with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 979377580; Wed, 24 Mar 2021 12:05:35 +0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs08n2.mediatek.inc (172.21.101.56) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 24 Mar 2021 12:05:33 +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; Wed, 24 Mar 2021 12:05:33 +0800 From: Lecopzer Chen To: , , , , CC: , , , , , , , , , , , Lecopzer Chen Subject: [PATCH v4 5/5] arm64: Kconfig: select KASAN_VMALLOC if KANSAN_GENERIC is enabled Date: Wed, 24 Mar 2021 12:05:22 +0800 Message-ID: <20210324040522.15548-6-lecopzer.chen@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20210324040522.15548-1-lecopzer.chen@mediatek.com> References: <20210324040522.15548-1-lecopzer.chen@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain X-TM-SNTS-SMTP: A3457C077D10D4C7DD6B3D9223F0B41AFC95665282A9E44F390A034C7FB65A4C2000:8 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Before this patch, someone who wants to use VMAP_STACK when KASAN_GENERIC enabled must explicitly select KASAN_VMALLOC. >From Will's suggestion [1]: > I would _really_ like to move to VMAP stack unconditionally, and > that would effectively force KASAN_VMALLOC to be set if KASAN is in use Because VMAP_STACK now depends on either HW_TAGS or KASAN_VMALLOC if KASAN enabled, in order to make VMAP_STACK selected unconditionally, we bind KANSAN_GENERIC and KASAN_VMALLOC together. Note that SW_TAGS supports neither VMAP_STACK nor KASAN_VMALLOC now, so this is the first step to make VMAP_STACK selected unconditionally. Bind KANSAN_GENERIC and KASAN_VMALLOC together is supposed to cost more memory at runtime, thus the alternative is using SW_TAGS KASAN instead. [1]: https://lore.kernel.org/lkml/20210204150100.GE20815@willie-the-truck/ Suggested-by: Will Deacon Signed-off-by: Lecopzer Chen --- arch/arm64/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 3e54fa938234..07762359d741 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -195,6 +195,7 @@ config ARM64 select IOMMU_DMA if IOMMU_SUPPORT select IRQ_DOMAIN select IRQ_FORCED_THREADING + select KASAN_VMALLOC if KASAN_GENERIC select MODULES_USE_ELF_RELA select NEED_DMA_MAP_STATE select NEED_SG_DMA_LENGTH -- 2.25.1