From patchwork Tue Aug 22 13:56:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 13360927 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 E2B63EE4993 for ; Tue, 22 Aug 2023 14:03:19 +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:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=wKbGSXLy/76KlFHrIPK0uz1kbE6vufVjKVbgKLgZK5k=; b=BH2FIYQolPqCW7 MTNGO/G0kGxV6sbn/pXwTY+AAFAXorVdYQmAsyuzfE9SicggLzoIrO7RW/OWox0QsigkJrcDcvKSo i5SQCQk8FOmWdDGT/DJKUiRvb9fz5k90GFh61NsiKyhAPIKYYDXufLNn9jk8rnTHzomJT5rECRywA e6B7T9+foR/K8rGAk9qPay/CWUBbhJuihgsPHTEzNYWhoESes1d6QcAC++0HA+rtwYxJoI/+2QquB dKS4C1NZ7WKCt2wZwXA1wESQeWB4/A9fDDNZdZMq1WHTfeTrjEXUZKh3ALb5+QMqAatTEGUPpk23M CDuQqiVZOA2lUV8HpR2g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qYRyW-00G66Q-07; Tue, 22 Aug 2023 14:03:16 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qYRyO-00G63Q-12; Tue, 22 Aug 2023 14:03:09 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id B1EF765764; Tue, 22 Aug 2023 14:03:07 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9638EC433CC; Tue, 22 Aug 2023 14:03:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1692712987; bh=pFAvrTvTUMO0xGKH/cMXrv1R9nlyUOOKoHgSKri2XFo=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=qTm9XTGvcYh+Br8eJUAeGbO/I6+6TObGxYTwfAxErZq7Ntyj+r+ZjZ36mVjjS7fby MGJHkozGMXiQgElJ1L/hdHWK5jS6K1IdwfgG9KFB0cPquHiAoreyGmmIaE94d5auZT rjpYop2VCduatHJPECR0bjHwBO9GubtNMy0N/6iGoLAWZEN1/T1a/pZ56+uoTSGifm wnKHoGJpjPpQVFEbG7W8LrY+Y/HsoFR9s1p6c//axRtaZ4h28qBqfFbSfM57TLqGYm bBjhEAgEE4xe1eR1F9baQN7ZtJmG9EQIaDzevsFHbvH7o4lc5g6GpvtWWOhLpiaI8I 5jsTDl5jo/oGQ== From: Mark Brown Date: Tue, 22 Aug 2023 14:56:34 +0100 Subject: [PATCH v5 01/37] arm64/mm: Restructure arch_validate_flags() for extensibility MIME-Version: 1.0 Message-Id: <20230822-arm64-gcs-v5-1-9ef181dd6324@kernel.org> References: <20230822-arm64-gcs-v5-0-9ef181dd6324@kernel.org> In-Reply-To: <20230822-arm64-gcs-v5-0-9ef181dd6324@kernel.org> To: 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 Cc: "H.J. Lu" , Paul Walmsley , Palmer Dabbelt , Albert Ou , 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, Mark Brown X-Mailer: b4 0.13-dev-034f2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1303; i=broonie@kernel.org; h=from:subject:message-id; bh=pFAvrTvTUMO0xGKH/cMXrv1R9nlyUOOKoHgSKri2XFo=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBk5L/wf8ItiVhhsjU1U1pKaopo/uh7rIWP4I7WMtBO inLmxduJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCZOS/8AAKCRAk1otyXVSH0AV6B/ 9NgV9lhw6oHPGtixcm5V3lAr7z+o9fWsFcBTBXWxSurUlb0XFjc+t7fDH7SvXhVDsM3caWcvDpNysc rUzR8kRdWUsc2c9LvqoaTcUMfW7SZ4LidddLAhjU+PCa1JGQoP92n9jN6TStbJ85YIH9l9KVVshmVZ XiPc6ANN4NmBzgKj9JGYlITGz4YnTicnXsOeD1e2p0e45JZx9f0hBIkU/lKRzsyIRzwpsY90K00Qz9 YGG3gusgb5P00L14xVRHrVAbuNMepnYq7a4rPyLGjenQCUiv8inCi9K4DWKE0JohN+V9sSbORNNply wIdHzUINXrAPZmj+TfHarlSM6uY9B7 X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230822_070308_444165_9056780F X-CRM114-Status: GOOD ( 13.12 ) X-BeenThere: linux-riscv@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-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Currently arch_validate_flags() is written in a very non-extensible fashion, returning immediately if MTE is not supported and writing the MTE check as a direct return. Since we will want to add more checks for GCS refactor the existing code to be more extensible, no functional change intended. Signed-off-by: Mark Brown --- arch/arm64/include/asm/mman.h | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/arch/arm64/include/asm/mman.h b/arch/arm64/include/asm/mman.h index 5966ee4a6154..c21849ffdd88 100644 --- a/arch/arm64/include/asm/mman.h +++ b/arch/arm64/include/asm/mman.h @@ -52,11 +52,17 @@ static inline bool arch_validate_prot(unsigned long prot, static inline bool arch_validate_flags(unsigned long vm_flags) { - if (!system_supports_mte()) - return true; + if (system_supports_mte()) { + /* + * only allow VM_MTE if VM_MTE_ALLOWED has been set + * previously + */ + if ((vm_flags & VM_MTE) && !(vm_flags & VM_MTE_ALLOWED)) + return false; + } + + return true; - /* only allow VM_MTE if VM_MTE_ALLOWED has been set previously */ - return !(vm_flags & VM_MTE) || (vm_flags & VM_MTE_ALLOWED); } #define arch_validate_flags(vm_flags) arch_validate_flags(vm_flags)