From patchwork Fri Jan 27 11:29:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Price X-Patchwork-Id: 49271 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:eb09:0:0:0:0:0 with SMTP id s9csp786973wrn; Fri, 27 Jan 2023 03:43:03 -0800 (PST) X-Google-Smtp-Source: AK7set8iuM9AIPflydgNdHzBnExKmGUXeSXr+tWmHd0AOcgB2kJ3eWq1yKhvJoxl+OiDlm87VRLR X-Received: by 2002:a05:6a20:8427:b0:bb:c422:809f with SMTP id c39-20020a056a20842700b000bbc422809fmr15703960pzd.4.1674819783227; Fri, 27 Jan 2023 03:43:03 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1674819783; cv=none; d=google.com; s=arc-20160816; b=TocghoLFsixK+HefyVinhFJQVc/eCHZT0Iu6yERL40/6ZZmdHfxYqabEcVNA2jNyhZ zcsvJvOQfOZDpWGdZXuZPttBKII1hy++bfBpLweN7GjCkroBxi4IF7bRX7ASdffG93Qw ZJ2XWmY5F9uB6G68JruJLYimUJcs+ZWqFVGUtiMTgNQehr9b9HCJMcBnsAe3ke34JUPY DuwClrsF5FVGtsERSjl7dEbG4ax3Vdw2sJhlkgEKeEl7H1oz6r8ignP98GZkMBGP5CMp CxMhBRth6UkpIh/vEN5+FRYYKRUj8vMmShJivPWETqo5IGieu2zNXDNgzATe4RWUOb9E rbZw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=kZJA/ys1VclTPGUWTGo4QpDJ9gGYmHyZgAYTZSfcaSs=; b=f7B//E0t1hzcEGiTu6eP+MmZY3hj2k6CNhE6e0kpAOHtzUxHNpyZ71z+Vo7iIX47vD iK3U3J5IcJIdkrU/6QqEpdNKP+pfEQmc1RE0rxD7QFYNg6SbcTT0gb40RAUnRUY5+NUd Cl0m2wqJEepxy0BzBJCbjJtyck9g15jlMr77tH6pChboimPjRB6mftnSeqMM+/mZls/R Ezter/VEfNz1JEjxnH9dq4bZbcNxus8EWKQp/WKd5c5AwUpsgAJ2agCV8JccleKnAqB4 TVMM7JJf4/wvvQ0OvXPeBjwu8yx2fzfzVQzVSVW1T3zb1pj7fBnMeJi5LyAmNtQ8CA1N sRjQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id j29-20020a637a5d000000b0047854cf6b6csi4020946pgn.513.2023.01.27.03.42.50; Fri, 27 Jan 2023 03:43:03 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232965AbjA0Ldr (ORCPT + 99 others); Fri, 27 Jan 2023 06:33:47 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48680 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233754AbjA0LdP (ORCPT ); Fri, 27 Jan 2023 06:33:15 -0500 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id EE6767C72A; Fri, 27 Jan 2023 03:31:34 -0800 (PST) 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 ED163175A; Fri, 27 Jan 2023 03:31:35 -0800 (PST) Received: from e122027.cambridge.arm.com (e122027.cambridge.arm.com [10.1.35.16]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id DA7843F64C; Fri, 27 Jan 2023 03:30:51 -0800 (PST) From: Steven Price To: kvm@vger.kernel.org, kvmarm@lists.linux.dev Cc: Steven Price , Catalin Marinas , Marc Zyngier , Will Deacon , James Morse , Oliver Upton , Suzuki K Poulose , 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 Subject: [RFC PATCH 28/28] HACK: Accept prototype RMI versions Date: Fri, 27 Jan 2023 11:29:32 +0000 Message-Id: <20230127112932.38045-29-steven.price@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230127112932.38045-1-steven.price@arm.com> References: <20230127112248.136810-1-suzuki.poulose@arm.com> <20230127112932.38045-1-steven.price@arm.com> MIME-Version: 1.0 X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1756175829100690172?= X-GMAIL-MSGID: =?utf-8?q?1756175829100690172?= The upstream RMM currently advertises the major version of an internal prototype (v56.0) rather than the expected version from the RMM architecture specification (v1.0). Add a config option to enable support for the prototype RMI v56.0. Signed-off-by: Steven Price --- arch/arm64/include/asm/rmi_smc.h | 7 +++++++ arch/arm64/kvm/Kconfig | 8 ++++++++ arch/arm64/kvm/rme.c | 8 ++++++++ 3 files changed, 23 insertions(+) diff --git a/arch/arm64/include/asm/rmi_smc.h b/arch/arm64/include/asm/rmi_smc.h index 16ff65090f3a..d6bbd7d92b8f 100644 --- a/arch/arm64/include/asm/rmi_smc.h +++ b/arch/arm64/include/asm/rmi_smc.h @@ -6,6 +6,13 @@ #ifndef __ASM_RME_SMC_H #define __ASM_RME_SMC_H +#ifdef CONFIG_RME_USE_PROTOTYPE_HACKS + +// Allow the prototype RMI version +#define PROTOTYPE_RMI_ABI_MAJOR_VERSION 56 + +#endif /* CONFIG_RME_USE_PROTOTYPE_HACKS */ + #include #define SMC_RxI_CALL(func) \ diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig index 05da3c8f7e88..13858a5047fd 100644 --- a/arch/arm64/kvm/Kconfig +++ b/arch/arm64/kvm/Kconfig @@ -58,6 +58,14 @@ config NVHE_EL2_DEBUG If unsure, say N. +config RME_USE_PROTOTYPE_HACKS + bool "Allow RMM prototype version numbers" + default y + help + For compatibility with the the current RMM code allow versions + numbers from a prototype implementation as well as the expected + version number from the RMM specification. + config PROTECTED_NVHE_STACKTRACE bool "Protected KVM hypervisor stacktraces" depends on NVHE_EL2_DEBUG diff --git a/arch/arm64/kvm/rme.c b/arch/arm64/kvm/rme.c index 1eb76cbee267..894060635226 100644 --- a/arch/arm64/kvm/rme.c +++ b/arch/arm64/kvm/rme.c @@ -67,6 +67,14 @@ static int rmi_check_version(void) version_major = RMI_ABI_VERSION_GET_MAJOR(res.a0); version_minor = RMI_ABI_VERSION_GET_MINOR(res.a0); +#ifdef PROTOTYPE_RMI_ABI_MAJOR_VERSION + // Support the prototype + if (version_major == PROTOTYPE_RMI_ABI_MAJOR_VERSION) { + kvm_err("Using prototype RMM support (version %d.%d)\n", + version_major, version_minor); + return 0; + } +#endif if (version_major != RMI_ABI_MAJOR_VERSION) { kvm_err("Unsupported RMI ABI (version %d.%d) we support %d\n", version_major, version_minor,