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=-21.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL 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 108D3C432BE for ; Mon, 2 Aug 2021 19:28:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ECC8F61050 for ; Mon, 2 Aug 2021 19:28:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231314AbhHBT21 (ORCPT ); Mon, 2 Aug 2021 15:28:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39512 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231186AbhHBT2Y (ORCPT ); Mon, 2 Aug 2021 15:28:24 -0400 Received: from mail-qt1-x84a.google.com (mail-qt1-x84a.google.com [IPv6:2607:f8b0:4864:20::84a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 29D49C061760 for ; Mon, 2 Aug 2021 12:28:14 -0700 (PDT) Received: by mail-qt1-x84a.google.com with SMTP id m2-20020ac807c20000b0290269bd8044e1so10513372qth.10 for ; Mon, 02 Aug 2021 12:28:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:message-id:mime-version:subject:from:to:cc; bh=7p7mJlnVfl7T+hlkAFYQVL3Is2jTnSQaIAIQgTOcTTk=; b=OY292XYyvnBQO68s2vxsf3lDot6Bl03ugOYkZXMJ9nkuBk+VuvbVvn/odIPpSKl276 xD0eqPI8jPoX/TF86opk9ZaMJQWa2HRJOq94tzbxlPWK8vES8KnmkizzX+2ms4SdkJJ6 OAEGDsS4vYub5LQa1QcPWHWhWX9ACr/85Dk+uBeK3Sgz0w17r8COtDiuMi5Eq4Hpqqcy FgTth+PT7AlHU0Y4O1Ql51fYFcVknWX7ukp6pFJ/ozpKLOPNo0Mma784d+wGq25wDBsO 8sl1aV66fmgfyNYGSCjjzQaZZDi76dVnOSRnA0hS9eEjO/QAPnioTibV1YLced4eE/us 9tLg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=7p7mJlnVfl7T+hlkAFYQVL3Is2jTnSQaIAIQgTOcTTk=; b=ROKYdexkRSO7ZeVWP9q/e8rJH7Y51UFgc4zWTCTGNFlzrXgJnimFrbMnzY30r71OPv AO2ceVYpt8ZU4jlD04KVsredroVrXo3BuKKl0nLucbrYl6DJ1uNG5bbE/Kxa2kjpZygC 4kxLCxDnCs9n3CJS1p0eTmDQEZ6DDOvar+uwPBRDcxjNdlrN/GdYfRhobwbJxiq8sztC CvhrVoa7A8ai/C+j6wbL6Hkw2IvgKGj3CyvpvsvgEBKO2PUnDM30j5XpWQdlYjA3jVbA 0t+4Q3BPuv0qX/lV9Vb80Eo1M1nlnjAz5O3GsSMZvHS4+sSHbbZ3JxVwTC6CqVNJQFjJ 9/IA== X-Gm-Message-State: AOAM532NJBJbwziJBK/xqpn4xVK4egB92yaC38XEJ72xoW189/2wZ0QL FGL5no9r0XQ4o7/khH7oV4lkEEMiqTg= X-Google-Smtp-Source: ABdhPJwgN1HZ3KJQEcy/2zN9k/TS5BpBTtk4TBxtE7nS2taL/Exse1zhnY7xm/INDrcGXMRjZGi0yvlXbY0= X-Received: from oupton.c.googlers.com ([fda3:e722:ac3:cc00:2b:ff92:c0a8:404]) (user=oupton job=sendgmr) by 2002:a05:6214:18c7:: with SMTP id cy7mr17647152qvb.59.1627932493300; Mon, 02 Aug 2021 12:28:13 -0700 (PDT) Date: Mon, 2 Aug 2021 19:28:06 +0000 Message-Id: <20210802192809.1851010-1-oupton@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.32.0.554.ge1b32706d8-goog Subject: [PATCH v3 0/3] KVM: arm64: Use generic guest entry infrastructure From: Oliver Upton To: kvmarm@lists.cs.columbia.edu Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Paolo Bonzini , Marc Zyngier , James Morse , Alexandru Elisei , Suzuki K Poulose , Catalin Marinas , Will Deacon , Thomas Gleixner , Peter Zijlstra , Andy Lutomirski , linux-arm-kernel@lists.infradead.org, Peter Shier , Shakeel Butt , Guangyu Shi , Oliver Upton Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The arm64 kernel doesn't yet support the full generic entry infrastructure. That being said, KVM/arm64 doesn't properly handle TIF_NOTIFY_RESUME and could pick this up by switching to the generic guest entry infrasturture. Patch 1 adds a missing vCPU stat to ARM64 to record the number of signal exits to userspace. Patch 2 unhitches entry-kvm from entry-generic, as ARM64 doesn't currently support the generic infrastructure. Patch 3 replaces the open-coded entry handling with the generic xfer function. This series was tested on an Ampere Mt. Jade reference system. The series cleanly applies to kvm/queue (note that this is deliberate as the generic kvm stats patches have not yet propagated to kvm-arm/queue) at the following commit: 8ad5e63649ff ("KVM: Don't take mmu_lock for range invalidation unless necessary") v1 -> v2: - Address Jing's comment - Carry Jing's r-b tag v2 -> v3: - Roll all exit conditions into kvm_vcpu_exit_request() (Marc) - Avoid needlessly checking for work twice (Marc) v1: http://lore.kernel.org/r/20210729195632.489978-1-oupton@google.com v2: http://lore.kernel.org/r/20210729220916.1672875-1-oupton@google.com Oliver Upton (3): KVM: arm64: Record number of signal exits as a vCPU stat entry: KVM: Allow use of generic KVM entry w/o full generic support KVM: arm64: Use generic KVM xfer to guest work function arch/arm64/include/asm/kvm_host.h | 1 + arch/arm64/kvm/Kconfig | 1 + arch/arm64/kvm/arm.c | 71 +++++++++++++++++++------------ arch/arm64/kvm/guest.c | 1 + include/linux/entry-kvm.h | 6 ++- 5 files changed, 52 insertions(+), 28 deletions(-) -- 2.32.0.554.ge1b32706d8-goog