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=-3.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,T_DKIMWL_WL_HIGH,USER_AGENT_GIT autolearn=unavailable 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 412A5C282CE for ; Tue, 4 Jun 2019 20:31:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 17C14208CB for ; Tue, 4 Jun 2019 20:31:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amazon.com header.i=@amazon.com header.b="Ta7hdhGD" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726716AbfFDUb5 (ORCPT ); Tue, 4 Jun 2019 16:31:57 -0400 Received: from smtp-fw-6001.amazon.com ([52.95.48.154]:10746 "EHLO smtp-fw-6001.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726312AbfFDUbd (ORCPT ); Tue, 4 Jun 2019 16:31:33 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1559680292; x=1591216292; h=from:to:cc:subject:date:message-id:mime-version; bh=Qvgi9EebcCKTkJL3XH6n75abRSmA+1KjL0uPQ7HHAeo=; b=Ta7hdhGDoJNbDuzf92aEfFIfqNN7443vpBk8sGQTF9UWGhbUKN9ieR59 gsOnxsL2GrXJiVmfPM2HkOzhTY9q92lesBR/VXMUAM+pHEjrLOA09O8jI BKOzdV6ci24zWxs9CLvPCpUGLHq9Yr61HX8G6106erqcQDVO2MscpDLhF o=; X-IronPort-AV: E=Sophos;i="5.60,550,1549929600"; d="scan'208";a="399352827" Received: from iad6-co-svc-p1-lb1-vlan3.amazon.com (HELO email-inbound-relay-2a-e7be2041.us-west-2.amazon.com) ([10.124.125.6]) by smtp-border-fw-out-6001.iad6.amazon.com with ESMTP; 04 Jun 2019 20:31:30 +0000 Received: from EX13MTAUEB001.ant.amazon.com (pdx1-ws-svc-p6-lb9-vlan3.pdx.amazon.com [10.236.137.198]) by email-inbound-relay-2a-e7be2041.us-west-2.amazon.com (Postfix) with ESMTPS id 4FA1CA21DD; Tue, 4 Jun 2019 20:31:29 +0000 (UTC) Received: from EX13D08UEB001.ant.amazon.com (10.43.60.245) by EX13MTAUEB001.ant.amazon.com (10.43.60.96) with Microsoft SMTP Server (TLS) id 15.0.1367.3; Tue, 4 Jun 2019 20:31:28 +0000 Received: from EX13MTAUEB001.ant.amazon.com (10.43.60.96) by EX13D08UEB001.ant.amazon.com (10.43.60.245) with Microsoft SMTP Server (TLS) id 15.0.1367.3; Tue, 4 Jun 2019 20:31:28 +0000 Received: from dev-dsk-alisaidi-i31e-4ac69482.us-east-1.amazon.com (10.200.136.151) by mail-relay.amazon.com (10.43.60.129) with Microsoft SMTP Server id 15.0.1367.3 via Frontend Transport; Tue, 4 Jun 2019 20:31:28 +0000 Received: by dev-dsk-alisaidi-i31e-4ac69482.us-east-1.amazon.com (Postfix, from userid 5131138) id 9A8BA47DE4; Tue, 4 Jun 2019 20:31:28 +0000 (UTC) From: Ali Saidi To: , , CC: Catalin Marinas , Will Deacon , Matt Mackall , Herbert Xu , Arnd Bergmann , "Greg Kroah-Hartman" , Ali Saidi , Ron Rindjunsky , Benjamin Herrenschmidt , David Woodhouse Subject: [PATCH 0/3] Add support for Graviton TRNG Date: Tue, 4 Jun 2019 20:30:57 +0000 Message-ID: <20190604203100.15050-1-alisaidi@amazon.com> X-Mailer: git-send-email 2.15.3.AMZN MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org AWS Graviton based systems provide an Arm SMC call in the vendor defined hypervisor region to read random numbers from a HW TRNG and return them to the guest. We've observed slower guest boot and especially reboot times due to lack of entropy and providing access to a TRNG is meant to address this. Ali Saidi (3): arm/arm64: Add smccc hypervisor service identifiers arm64: export acpi_psci_use_hvc hwrng: Add support for AWS Graviton TRNG MAINTAINERS | 6 ++ arch/arm64/kernel/acpi.c | 1 + drivers/char/hw_random/Kconfig | 13 ++++ drivers/char/hw_random/Makefile | 1 + drivers/char/hw_random/graviton-rng.c | 123 ++++++++++++++++++++++++++++++++++ include/linux/arm-smccc.h | 2 + 6 files changed, 146 insertions(+) create mode 100644 drivers/char/hw_random/graviton-rng.c -- 2.15.3.AMZN