From nobody Sun Sep 14 03:51:53 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AA4BDC38142 for ; Fri, 27 Jan 2023 11:30:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233383AbjA0LaW (ORCPT ); Fri, 27 Jan 2023 06:30:22 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38040 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233356AbjA0L3n (ORCPT ); Fri, 27 Jan 2023 06:29:43 -0500 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id D499C72649 for ; Fri, 27 Jan 2023 03:28:57 -0800 (PST) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id C9BDF15BF; Fri, 27 Jan 2023 03:29:06 -0800 (PST) Received: from e122027.cambridge.arm.com (e122027.cambridge.arm.com [10.1.35.16]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6CF793F64C; Fri, 27 Jan 2023 03:28:22 -0800 (PST) From: Steven Price To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org Cc: Steven Price , Catalin Marinas , Ard Biesheuvel , Marc Zyngier , Will Deacon , Suzuki K Poulose , James Morse , Oliver Upton , Zenghui Yu , linux-kernel@vger.kernel.org, Joey Gouly , Alexandru Elisei , Christoffer Dall , Fuad Tabba , linux-coco@lists.linux.dev Subject: [RFC PATCH 05/14] arm64: Mark all I/O as non-secure shared Date: Fri, 27 Jan 2023 11:27:49 +0000 Message-Id: <20230127112758.37891-6-steven.price@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230127112758.37891-1-steven.price@arm.com> References: <20230127112248.136810-1-suzuki.poulose@arm.com> <20230127112758.37891-1-steven.price@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" All I/O is by default considered non-secure for realms. As such mark them as shared with the host. Co-developed-by: Suzuki K Poulose Signed-off-by: Suzuki K Poulose Signed-off-by: Steven Price --- arch/arm64/include/asm/io.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h index 877495a0fd0c..b1a9c22aed72 100644 --- a/arch/arm64/include/asm/io.h +++ b/arch/arm64/include/asm/io.h @@ -142,12 +142,12 @@ extern void __memset_io(volatile void __iomem *, int,= size_t); bool ioremap_allowed(phys_addr_t phys_addr, size_t size, unsigned long pro= t); #define ioremap_allowed ioremap_allowed =20 -#define _PAGE_IOREMAP PROT_DEVICE_nGnRE +#define _PAGE_IOREMAP (PROT_DEVICE_nGnRE | PROT_NS_SHARED) =20 #define ioremap_wc(addr, size) \ - ioremap_prot((addr), (size), PROT_NORMAL_NC) + ioremap_prot((addr), (size), (PROT_NORMAL_NC | PROT_NS_SHARED)) #define ioremap_np(addr, size) \ - ioremap_prot((addr), (size), PROT_DEVICE_nGnRnE) + ioremap_prot((addr), (size), (PROT_DEVICE_nGnRnE | PROT_NS_SHARED)) =20 /* * io{read,write}{16,32,64}be() macros --=20 2.34.1