From nobody Thu Nov 28 06:33:03 2024 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id CCCAD219496; Fri, 4 Oct 2024 14:43:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728053034; cv=none; b=EvR2o+g4IOcZfuoNcpwy5zH+kLq6f+gTzKLvF4qhUhDHfiucbfd0usWe9+/EDDrwEiH1xuKiQZv8Bxn64N277AwpAqjCpC2if7JTdJdpUKHxQtrHyACihFzABfrs6qXh1f0rMw2eSx/wfvzK0eKCcpLGuwCZfc7ljkD0SWlXl+o= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728053034; c=relaxed/simple; bh=rHfXJeAwAi9TMqENy4pVL5TGkcKZ21cIhK6xKWjOs5c=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=XuRk+8bv0RIWzQBpezXupGuvs8ux/EKuW2ipzDAYxYaOqrenlQ24ElZ2pRrlCMsabaiFdnILyxfLyv+vG0hmBRUI/ffB3jC59TaSVD3jsqOrig0Wv52bScyuU3z5SSmlqOVeW0eM3HvRT8gfQF/eIpKZBXyZ1EIoMKz3NtjxGRg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com 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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 Reviewed-by: Catalin Marinas Reviewed-by: Gavin Shan --- 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_mem= ory_desc_t *md) u64 attr =3D md->attribute; u32 type =3D md->type; =20 - if (type =3D=3D EFI_MEMORY_MAPPED_IO) - return PROT_DEVICE_nGnRE; + if (type =3D=3D EFI_MEMORY_MAPPED_IO) { + pgprot_t prot =3D __pgprot(PROT_DEVICE_nGnRE); + + if (arm64_is_mmio_private(md->phys_addr, + md->num_pages << EFI_PAGE_SHIFT)) + prot =3D pgprot_encrypted(prot); + else + prot =3D pgprot_decrypted(prot); + return pgprot_val(prot); + } =20 if (region_is_misaligned(md)) { static bool __initdata code_is_misaligned; --=20 2.34.1