From patchwork Fri Oct 4 14:43:00 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Price X-Patchwork-Id: 13822508 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 4C298CF8842 for ; Fri, 4 Oct 2024 14:51:40 +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=6rAAUQ76vUrwQ62HbSdfHlFx91FIkrRY+YD+wJrFL4o=; b=RIW/oD1oAQgRSM2n85CkYLi4OB OuK7j76EYldAc+OEhQyLSrulDtGNnytv7o/ClTmeAjAyh4/qX9UbYaU6eyXRonmd5uV0eXQ8uprHY 4+7YStW1ghCpfBWD3h90yKLu1VQ2qmazbJsHzYnX98HJ165zAhd15QKqx22E74pndkUtUAJko7Al4 L0F9nx6yHUctfKczxiq8OE0FtldQqS9Pnm285mo+dcOi58MO6XnKuj2aPYgMVckhzppW13pcHTc4M EgRtKWzYLoOqIRHDnCApUw2ButWk6KOLZk5XbGONJf3EfqZF7PG/zAZuz9WLDqpVz9QB0kwfe34Pa 3rmiRX0g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1swjeR-0000000CrfC-3WLR; Fri, 04 Oct 2024 14:51:27 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1swjX4-0000000CpK4-1bmn for linux-arm-kernel@lists.infradead.org; Fri, 04 Oct 2024 14:43:51 +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 F100C339; Fri, 4 Oct 2024 07:44:17 -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 ED6403F58B; Fri, 4 Oct 2024 07:43:44 -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 05/11] arm64: rsi: Map unprotected MMIO as decrypted Date: Fri, 4 Oct 2024 15:43:00 +0100 Message-Id: <20241004144307.66199-6-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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241004_074350_498022_D6EB5B6E X-CRM114-Status: UNSURE ( 9.47 ) X-CRM114-Notice: Please train this message. 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 Instead of marking every MMIO as shared, check if the given region is "Protected" and apply the permissions accordingly. Signed-off-by: Suzuki K Poulose Signed-off-by: Steven Price Reviewed-by: Gavin Shan Reviewed-by: Catalin Marinas --- New patch for v5 --- arch/arm64/kernel/rsi.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/arch/arm64/kernel/rsi.c b/arch/arm64/kernel/rsi.c index d7bba4cee627..f1add76f89ce 100644 --- a/arch/arm64/kernel/rsi.c +++ b/arch/arm64/kernel/rsi.c @@ -6,6 +6,8 @@ #include #include #include + +#include #include struct realm_config config; @@ -92,6 +94,16 @@ bool arm64_is_protected_mmio(phys_addr_t base, size_t size) } EXPORT_SYMBOL(arm64_is_protected_mmio); +static int realm_ioremap_hook(phys_addr_t phys, size_t size, pgprot_t *prot) +{ + if (arm64_is_protected_mmio(phys, size)) + *prot = pgprot_encrypted(*prot); + else + *prot = pgprot_decrypted(*prot); + + return 0; +} + void __init arm64_rsi_init(void) { if (arm_smccc_1_1_get_conduit() != SMCCC_CONDUIT_SMC) @@ -102,6 +114,9 @@ void __init arm64_rsi_init(void) return; prot_ns_shared = BIT(config.ipa_bits - 1); + if (arm64_ioremap_prot_hook_register(realm_ioremap_hook)) + return; + arm64_rsi_setup_memory(); static_branch_enable(&rsi_present);