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=-26.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=ham 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 3B0ADC83019 for ; Thu, 26 Nov 2020 15:55:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 00F5921D46 for ; Thu, 26 Nov 2020 15:55:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="DW6HRBvH" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2403861AbgKZPzO (ORCPT ); Thu, 26 Nov 2020 10:55:14 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51268 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403858AbgKZPzN (ORCPT ); Thu, 26 Nov 2020 10:55:13 -0500 Received: from mail-wm1-x343.google.com (mail-wm1-x343.google.com [IPv6:2a00:1450:4864:20::343]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 52B3AC0617A7 for ; Thu, 26 Nov 2020 07:55:13 -0800 (PST) Received: by mail-wm1-x343.google.com with SMTP id s13so2858747wmh.4 for ; Thu, 26 Nov 2020 07:55:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=yy/LdNdSlEKXNA1O0CJPP3BR+TLcin0LNTWW2mqA/Ws=; b=DW6HRBvH1dMRy9410u25SEcLsIp2cGZuNo6NNar9dsMBlj7Q7JHURHQ2ZWwJ4jXPRq FACFV5c1R7NwwKB0Oib/MpTay9RuvI6yCYOXmhbV+Pr3HgDlXdyvlg4UItg4lhdUNGHa Ld69QoFi9l+cU2d7Jj3v+urROaKpzMnCR+uXap1CF7z5vcz37pqfkvZgvs19n+L89vHB EEJiRfonQQHkdGI2wagoH7mhFUxDpAHkdjQtb7l1WLX+s81JCnUu/JCu2sK0TldwqLJv vWKQT0qJDuODF6PdMxt4duYZuW8RI90XbH/vsvYAybJHI2J7TmqDikGk5/EKWk9vYwAn 9ECg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=yy/LdNdSlEKXNA1O0CJPP3BR+TLcin0LNTWW2mqA/Ws=; b=CIy0QhV8NtHxZYuiE4eAcHwuxAGR7xLyiPWKSVluiBYWQTo6ailoAQA8Q4jA4De1ZY me4JZXCEePIEbyd0XemLnf/2EAqx/A6gh/cgpDbr4Is4YciRJ+iQCzg4Wb7kh4mDMXky 6RySLY65Yb1Xnf9eP1bpGWAPD5Ro0GUIGNod9rNNroZqzwqJ7VS5NnL2LjZ47j9t3fk7 b6wr3ugK1wCJPJENQAmiVAstoicyQnxCVf7YOQG6BowPYnD8SsUVXIYa3IbTlHR9uNKf Wh8oMOcImr9/5hlY+iXxMidzdAx4XWzSMOyDf0va2sGWI+vkSArDpfpUYlclJ3xmau0D JWpg== X-Gm-Message-State: AOAM532mnbBgnAQbEFPJb17rfOvzdK8t03unC6cWv2oDMaLv+Nvwj6fW b0xxJEVRKs79+i0WruBDSnWgWw== X-Google-Smtp-Source: ABdhPJzVolDDwaIJ6HnyKtT7uOspSO1I6DuI7m5CXOsy4xcwwUFP5ghKEPUc3bw4ZpFlZEJaa1lvVQ== X-Received: by 2002:a1c:61c2:: with SMTP id v185mr4165642wmb.152.1606406111903; Thu, 26 Nov 2020 07:55:11 -0800 (PST) Received: from localhost ([2a01:4b00:8523:2d03:f008:704d:8d4b:9951]) by smtp.gmail.com with ESMTPSA id q25sm10978629wmq.37.2020.11.26.07.55.10 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 26 Nov 2020 07:55:10 -0800 (PST) From: David Brazdil To: kvmarm@lists.cs.columbia.edu Cc: Jonathan Corbet , Catalin Marinas , Will Deacon , Marc Zyngier , James Morse , Julien Thierry , Suzuki K Poulose , Dennis Zhou , Tejun Heo , Christoph Lameter , Mark Rutland , Lorenzo Pieralisi , Sudeep Holla , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel-team@android.com, David Brazdil Subject: [PATCH v3 21/23] kvm: arm64: Keep nVHE EL2 vector installed Date: Thu, 26 Nov 2020 15:54:19 +0000 Message-Id: <20201126155421.14901-22-dbrazdil@google.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201126155421.14901-1-dbrazdil@google.com> References: <20201126155421.14901-1-dbrazdil@google.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org KVM by default keeps the stub vector installed and installs the nVHE vector only briefly for init and later on demand. Change this policy to install the vector at init and then never uninstall it if the kernel was given the protected KVM command line parameter. Signed-off-by: David Brazdil --- arch/arm64/kvm/arm.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 7a17b5048454..6ec8ddf74643 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -1478,7 +1478,8 @@ static void _kvm_arch_hardware_disable(void *discard) void kvm_arch_hardware_disable(void) { - _kvm_arch_hardware_disable(NULL); + if (!is_protected_kvm_enabled()) + _kvm_arch_hardware_disable(NULL); } #ifdef CONFIG_CPU_PM @@ -1521,11 +1522,13 @@ static struct notifier_block hyp_init_cpu_pm_nb = { static void __init hyp_cpu_pm_init(void) { - cpu_pm_register_notifier(&hyp_init_cpu_pm_nb); + if (!is_protected_kvm_enabled()) + cpu_pm_register_notifier(&hyp_init_cpu_pm_nb); } static void __init hyp_cpu_pm_exit(void) { - cpu_pm_unregister_notifier(&hyp_init_cpu_pm_nb); + if (!is_protected_kvm_enabled()) + cpu_pm_unregister_notifier(&hyp_init_cpu_pm_nb); } #else static inline void hyp_cpu_pm_init(void) @@ -1617,7 +1620,8 @@ static int init_subsystems(void) kvm_sys_reg_table_init(); out: - on_each_cpu(_kvm_arch_hardware_disable, NULL, 1); + if (err || !is_protected_kvm_enabled()) + on_each_cpu(_kvm_arch_hardware_disable, NULL, 1); return err; } -- 2.29.2.454.gaff20da3a2-goog