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 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 D1714C4167B for ; Mon, 4 Dec 2023 03:02:28 +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: In-reply-to:Subject:Cc:To:From:References:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=Iz05UXtYc22xB5Karar0L24ZpeHW8zVazv60ioWQltY=; b=OOMCaQRd581KI0ygjcQ60ohMjY 2Kbkkyl4X883zLjVzypcwtnuj17ZCjEiiZSR+XXYIItpZ81mqVZD5jTvcOlvt2xbLQK6k/Kafie0Z noA6L8h7vpMTY1aXUVV44C1JVv64ZqdfWTlCF2BbhwHShephuceBLJIRzqhngLoM2CfVImvWzP6cK VgbnVwHFM6RqQ1crCYfaF83IBJIoNi7qWt0mUZbHsrKYsrjFAinNA5YOxPgNz5nssvOqBfMbFrqiJ r14YDzbJPVFOgZHZSxQlp/NCjoMFlRKiP76abfLskfNYA4XhVbL9GlQ9T8Vd6eu/TD+gfP/lnXYFd /DgxgRMA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1r9zDZ-002sYs-25; Mon, 04 Dec 2023 03:01:57 +0000 Received: from mail-pf1-x436.google.com ([2607:f8b0:4864:20::436]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1r9zDV-002sXv-1y for linux-arm-kernel@lists.infradead.org; Mon, 04 Dec 2023 03:01:55 +0000 Received: by mail-pf1-x436.google.com with SMTP id d2e1a72fcca58-6ce32821a53so269121b3a.0 for ; Sun, 03 Dec 2023 19:01:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1701658912; x=1702263712; darn=lists.infradead.org; h=mime-version:message-id:date:in-reply-to:subject:cc:to:from :user-agent:references:from:to:cc:subject:date:message-id:reply-to; bh=CQYiiiRLontcDI44whmeD/LoEJVxuqfkBiryqv/zBTg=; b=e3Q1W4Lq7iuaXXA1W75ZYoph517gaIVr/P19lnuJvKPGykJAlkHmWncBMgBzQ2cAT8 cAScqSyc/bJ93hIA4OIOSueWro4Fxi7femaLgFlu2NhIz/cnvTjhF9vowLbD9U5PZA9K fufxKeJ66zb2TobIfpbXFLvbcf+d6PlvlBa9AvhWT67pwlz2c4El2VXebsfJ0ZdFEclY r2GgsIlb7RsH8kn6xfd28ZT5uwTUDVcb8OGygWCfuS2c6qDTvMpPbfNtlRIAsmY119QW 6YJDz9qhLMECTJof1O64eGYF1r3mH9mXS/0JqxKqCAACuSZQIP0f6MVlZxizf9SiJWNG 0Jag== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1701658912; x=1702263712; h=mime-version:message-id:date:in-reply-to:subject:cc:to:from :user-agent:references:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=CQYiiiRLontcDI44whmeD/LoEJVxuqfkBiryqv/zBTg=; b=q7GwTXuGruONq9oQVW7CmtjiNDWnfc+XVcP8J31kqj4PvhFgBEgnaB+kxbqCXFBREe yexeKwMErLKJ4LTJ1b0buYMXUitfebTQ0jMvkJ30l9W/i4BqwI7z2LV4ljOLi5wc6UKJ CbmqWdREr1ntdYvO4fkpWzRBrzlM8ahWOxN29vCe6TOZu4dLeSt8lHscFEbqhVG2uD6L QAKzhaUmFuy4UDy1tqgTpJLxbMl38EG9cGjhyZhn2m98iDsB0SK09vB6MD47ibzTWRCk S8HrSEctWK6tYRzVprMSuUdVD5l6565aNKKRebDGJ12G1TYwG48rhsGb/4vcomu7NymP az+A== X-Gm-Message-State: AOJu0YxWb4j6PtxMM8GCPJjjxdiEdVst8tqb9qW6r88RBg64xW5WWqmn 2SvWXo3KtO99luZ8ht+TdpgCYg== X-Google-Smtp-Source: AGHT+IHFLJUBmtnWAvysao8TWHQlyk2Cfpox9jD8bkyNgUP4wKyxIxGZHkfjhvm//XUEUavLfPd53A== X-Received: by 2002:a05:6a20:748f:b0:18c:8fef:22cc with SMTP id p15-20020a056a20748f00b0018c8fef22ccmr1035248pzd.24.1701658911982; Sun, 03 Dec 2023 19:01:51 -0800 (PST) Received: from localhost ([2804:14d:7e39:8470:979a:226c:de55:73de]) by smtp.gmail.com with ESMTPSA id c24-20020aa78818000000b006cd88728572sm6562301pfo.211.2023.12.03.19.01.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 03 Dec 2023 19:01:51 -0800 (PST) References: <20231122-arm64-gcs-v7-0-201c483bd775@kernel.org> <20231122-arm64-gcs-v7-13-201c483bd775@kernel.org> User-agent: mu4e 1.10.8; emacs 29.1 From: Thiago Jung Bauermann To: Mark Brown Cc: Catalin Marinas , Will Deacon , Jonathan Corbet , Andrew Morton , Marc Zyngier , Oliver Upton , James Morse , Suzuki K Poulose , Arnd Bergmann , Oleg Nesterov , Eric Biederman , Kees Cook , Shuah Khan , "Rick P. Edgecombe" , Deepak Gupta , Ard Biesheuvel , Szabolcs Nagy , "H.J. Lu" , Paul Walmsley , Palmer Dabbelt , Albert Ou , Florian Weimer , Christian Brauner , linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, kvmarm@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org Subject: Re: [PATCH v7 13/39] arm64/mm: Map pages for guarded control stack In-reply-to: <20231122-arm64-gcs-v7-13-201c483bd775@kernel.org> Date: Mon, 04 Dec 2023 00:01:49 -0300 Message-ID: <87a5qqisbm.fsf@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231203_190153_753282_BD7E5021 X-CRM114-Status: GOOD ( 14.16 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hello, Mark Brown writes: > diff --git a/arch/arm64/mm/mmap.c b/arch/arm64/mm/mmap.c > index 645fe60d000f..605d4e6edc1d 100644 > --- a/arch/arm64/mm/mmap.c > +++ b/arch/arm64/mm/mmap.c > @@ -79,9 +79,20 @@ arch_initcall(adjust_protection_map); > > pgprot_t vm_get_page_prot(unsigned long vm_flags) > { > - pteval_t prot = pgprot_val(protection_map[vm_flags & > + pteval_t prot; > + > + /* If this is a GCS then only interpret VM_WRITE. */ > + if (system_supports_gcs() && (vm_flags & VM_SHADOW_STACK)) { > + if (vm_flags & VM_WRITE) > + prot = _PAGE_GCS; > + else > + prot = _PAGE_GCS_RO; > + } else { > + prot = pgprot_val(protection_map[vm_flags & > (VM_READ|VM_WRITE|VM_EXEC|VM_SHARED)]); > + } > > + /* VM_ARM64_BTI on a GCS is rejected in arch_valdiate_flags() */ s/valdiate/validate/ > if (vm_flags & VM_ARM64_BTI) > prot |= PTE_GP; -- Thiago _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel