From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 38B6028EF; Fri, 27 Jan 2023 11:28:25 +0000 (UTC) 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> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 prot); #define ioremap_allowed ioremap_allowed -#define _PAGE_IOREMAP PROT_DEVICE_nGnRE +#define _PAGE_IOREMAP (PROT_DEVICE_nGnRE | PROT_NS_SHARED) #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)) /* * io{read,write}{16,32,64}be() macros -- 2.34.1