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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 20AD6C388F7 for ; Thu, 5 Nov 2020 12:58:17 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9436B206D4 for ; Thu, 5 Nov 2020 12:58:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="BKBLn2RG" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9436B206D4 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:MIME-Version:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References:List-Owner; bh=gpFgyhnSUBBG2hKWAcWZqv/2LyPxAZnFVAkeL9li5GE=; b=BKBLn2RGe4j3htmLP10fUYwRXW DvnaNoNGhHOx4VNodUizXc0Mb+swib9I++gdbpBRAh2NwptAI8oXdpr2yQVetvsw3oaU+BTk59pNh bgTxIMiPwVDDF9Y/ROehU6OAIM76ECQ97yEvRTWpeY0MJcY9uCvDVsd/deuC7rS3urOurdZ8v42g6 HeMuYb4Ntt7sa44iWXdeBEaCLMNs58FabQCI7+Lc+qSMBoNQitGqNhdpQhBTcHtS//nysI7uJbDkX 84IafXzEKTt86YWIU6nol1R3dbG8GiYUXbxouFeD5C4v2Gb/ira1BzYgGyAh0eloENAwAEdRguxD7 0O7zWS6g==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kaepC-0004oL-Ck; Thu, 05 Nov 2020 12:57:10 +0000 Received: from foss.arm.com ([217.140.110.172]) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kaep9-0004nY-0v for linux-arm-kernel@lists.infradead.org; Thu, 05 Nov 2020 12:57:08 +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 79205142F; Thu, 5 Nov 2020 04:57:05 -0800 (PST) Received: from donnerap.arm.com (donnerap.cambridge.arm.com [10.1.195.35]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id CD4383F719; Thu, 5 Nov 2020 04:57:03 -0800 (PST) From: Andre Przywara To: Will Deacon , Catalin Marinas , Ard Biesheuvel , Russell King Subject: [PATCH v2 0/5] ARM: arm64: Add SMCCC TRNG entropy service Date: Thu, 5 Nov 2020 12:56:51 +0000 Message-Id: <20201105125656.25259-1-andre.przywara@arm.com> X-Mailer: git-send-email 2.17.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201105_075707_124077_5D3F150B X-CRM114-Status: GOOD ( 18.97 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Lorenzo Pieralisi , Linus Walleij , linux-kernel@vger.kernel.org, Mark Brown , Sudeep Holla , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The ARM architected TRNG firmware interface, described in ARM spec DEN0098[1], defines an ARM SMCCC based interface to a true random number generator, provided by firmware. This series collects all the patches implementing this in various places: as a user feeding into the ARCH_RANDOM pool, both for ARM and arm64, and as a service provider for KVM guests. Patch 1 introduces the interface definition used by all three entities. Patch 2 prepares the Arm SMCCC firmware driver to probe for the interface. This patch is needed to avoid a later dependency on *two* patches (there might be a better solution to this problem). Patch 3 implements the ARM part, patch 4 is the arm64 version. The final patch 5 adds support to provide random numbers to KVM guests. Compared to the initial posts, this version: - triggers the ARCH_RANDOM initialisation from the SMCCC firmware driver - uses a single bool in smccc.c to hold the initialisation state for arm64 - handles endianess correctly in the KVM provider This was tested on: - QEMU -kernel (no SMCCC, regression test) - Juno w/ standard firmware (SMCCC, but no TRNG: regression test) - Juno w/ "fake TRNG" firmware (to verify "random" numbers) - Juno w/ prototype of the h/w Trusted RNG support - mainline KVM (SMCCC, but no TRNG: regression test) - ARM and arm64 KVM guests, using the KVM service in patch 5/5 Based on v5.10-rc2, please let me know if I should rebased on something else. A git repo is accessible at: https://gitlab.arm.com/linux-arm/linux-ap/-/commits/smccc-trng/v2/ Cheers, Andre [1] https://developer.arm.com/documentation/den0098/latest/ Andre Przywara (2): firmware: smccc: Introduce SMCCC TRNG framework arm64: Add support for SMCCC TRNG entropy source Ard Biesheuvel (3): firmware: smccc: Add SMCCC TRNG function call IDs ARM: implement support for SMCCC TRNG entropy source KVM: arm64: implement the TRNG hypervisor call arch/arm/Kconfig | 4 ++ arch/arm/include/asm/archrandom.h | 74 +++++++++++++++++++++++ arch/arm64/include/asm/archrandom.h | 63 +++++++++++++++++--- arch/arm64/include/asm/kvm_host.h | 2 + arch/arm64/kvm/Makefile | 2 +- arch/arm64/kvm/hypercalls.c | 6 ++ arch/arm64/kvm/trng.c | 91 +++++++++++++++++++++++++++++ drivers/firmware/smccc/smccc.c | 5 ++ include/linux/arm-smccc.h | 31 ++++++++++ 9 files changed, 270 insertions(+), 8 deletions(-) create mode 100644 arch/arm/include/asm/archrandom.h create mode 100644 arch/arm64/kvm/trng.c -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel