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 8DA41CF8843 for ; Fri, 4 Oct 2024 14:52:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=BdKH6JWrmifgvkoq1NTExyK8i/ckTcok+TJwygulkXU=; b=e77vixsYbqhPZqP6pj5QzdJZu3 /Fj/9wAgFOVBkdidPZhFhWiv/eCrjiiqTVntu4YgPyDG0voyZhbW4MnS2oiPha9kKXtiitUGROraD HDZymnIxzjTT+g3Uf3IA0ohXKRWDRQKXY4xfx9WAgvmTvde436goAC/6IjrbkmchOO4da6hCKrHK1 HgnRPzAVskf5PE1k9qa4yNKf6kGgHdiWG8wvS2kk/DbcPkANGW0nRSdTPS3O0LG4C5pJ1Ke7hj4wz CiNEOPLuX5imULLqtXXj/N0pXDh3qfEE7TwuCyVGQ5onuINjAocAHIrY5HaUS9f8Km+urt+G84+YY eFP9rg+Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1swjfk-0000000Cs2D-0Zvu; Fri, 04 Oct 2024 14:52:48 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1swjX8-0000000CpLQ-2pjO for linux-arm-kernel@lists.infradead.org; Fri, 04 Oct 2024 14:43:56 +0000 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 C1A341063; Fri, 4 Oct 2024 07:44:21 -0700 (PDT) Received: from e122027.cambridge.arm.com (unknown [10.1.25.25]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id D45BE3F58B; Fri, 4 Oct 2024 07:43:48 -0700 (PDT) From: Steven Price To: kvm@vger.kernel.org, kvmarm@lists.linux.dev Cc: Suzuki K Poulose , Catalin Marinas , Marc Zyngier , Will Deacon , James Morse , Oliver Upton , Zenghui Yu , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Joey Gouly , Alexandru Elisei , Christoffer Dall , Fuad Tabba , linux-coco@lists.linux.dev, Ganapatrao Kulkarni , Gavin Shan , Shanker Donthineni , Alper Gun , "Aneesh Kumar K . V" , Steven Price Subject: [PATCH v6 06/11] efi: arm64: Map Device with Prot Shared Date: Fri, 4 Oct 2024 15:43:01 +0100 Message-Id: <20241004144307.66199-7-steven.price@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241004144307.66199-1-steven.price@arm.com> References: <20241004144307.66199-1-steven.price@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241004_074354_779543_3C3F0952 X-CRM114-Status: GOOD ( 11.81 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Suzuki K Poulose Device mappings need to be emulated by the VMM so must be mapped shared with the host. Signed-off-by: Suzuki K Poulose Signed-off-by: Steven Price --- Changes since v4: * Reworked to use arm64_is_iomem_private() to decide whether the memory needs to be decrypted or not. --- arch/arm64/kernel/efi.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c index 712718aed5dd..1cc64053d6b1 100644 --- a/arch/arm64/kernel/efi.c +++ b/arch/arm64/kernel/efi.c @@ -34,8 +34,16 @@ static __init pteval_t create_mapping_protection(efi_memory_desc_t *md) u64 attr = md->attribute; u32 type = md->type; - if (type == EFI_MEMORY_MAPPED_IO) - return PROT_DEVICE_nGnRE; + if (type == EFI_MEMORY_MAPPED_IO) { + pgprot_t prot = __pgprot(PROT_DEVICE_nGnRE); + + if (arm64_is_mmio_private(md->phys_addr, + md->num_pages << EFI_PAGE_SHIFT)) + prot = pgprot_encrypted(prot); + else + prot = pgprot_decrypted(prot); + return pgprot_val(prot); + } if (region_is_misaligned(md)) { static bool __initdata code_is_misaligned; -- 2.34.1