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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 11359C352A1 for ; Wed, 30 Nov 2022 23:10:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229763AbiK3XKB (ORCPT ); Wed, 30 Nov 2022 18:10:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46142 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229632AbiK3XJo (ORCPT ); Wed, 30 Nov 2022 18:09:44 -0500 Received: from mail-pg1-x54a.google.com (mail-pg1-x54a.google.com [IPv6:2607:f8b0:4864:20::54a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 11C7C60376 for ; Wed, 30 Nov 2022 15:09:43 -0800 (PST) Received: by mail-pg1-x54a.google.com with SMTP id 11-20020a63000b000000b004776fe2eebfso85027pga.9 for ; Wed, 30 Nov 2022 15:09:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=kawSfeiAQQiBaQdAeCS12WX5tLp3dBMfNzsm6MZMVDM=; b=FuPyDk5HrtCF5qsfcl43lYyhvkgSpcbbsM90YW/3vO3HUB6l7+MBsntxd3/q8gIxoj rdKuy8tsa4qXKw46UszgYe7A8/TdMyQmeCoF+YYW9dIEj0dViDiBTtgxBOSRXDRa96/f KliWaD9EYRQHMZlNfki4Q8T7/+zZVlwydZoPGCadpemWGxJB7IFN8q6Q93mpMbE0d+Tv Gf+jRZICWLnpxC3g1kbOTurVfxPkN8C+UYy/6R3UIEQErk2k3Er1Jkq5UmKt+OcBkjXI DwaZ1o75hI5oxdTAgGbi6NECIv+ulAm+Z4MzH2VhP/t3nIxcOzScSD0PtVDNJOMhMUZG LZUw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=kawSfeiAQQiBaQdAeCS12WX5tLp3dBMfNzsm6MZMVDM=; b=xd/5xLW/vhBc4fXdo/0hk0ZhI6rAwe1vHXtG7tUQ9lKeEMLm+RXbtEudWc6NBwgaG7 Xt4BM1LsBk3Pw0B5GEEjk4O1PBbZBI0BkvTWf+CewXZ0+nfvg7j2nJcdPmwkZXFQQmtD tUSsbw8D6De2ta0g7vnIKHR4jVUpjMBT22pCLDBEKvin/1ZGzkle7yIklIwUBJTvKyeI fyyoS7emL96JRp18SmeSEbICzgUzNMs03irVJHn0+4LxVYWxucyGMuG8C5VoFuLs1RRh DtibDKPsjw6pphcys1s1VNGwiypIpM9UNRQ7Ea8arsKbfmeZo4xqjVY5k0+jXHPDOKGW a5/A== X-Gm-Message-State: ANoB5plNJDh8P18Lf3DosReDn0WlDm9DBA7aTjMkS1ZHY3KycilNfk03 JYZveGr5o5/WgX9agUfdBa8240fioqM= X-Google-Smtp-Source: AA0mqf6wj4HWNV+5cP60rIX6ofADo44xPOiR/JXYf/UmKFCdE5+oZoM8ajSF5PuZFF+kh92E+ZGoi4VvFjg= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a62:82c7:0:b0:575:398:468c with SMTP id w190-20020a6282c7000000b005750398468cmr21072041pfd.23.1669849782508; Wed, 30 Nov 2022 15:09:42 -0800 (PST) Reply-To: Sean Christopherson Date: Wed, 30 Nov 2022 23:08:47 +0000 In-Reply-To: <20221130230934.1014142-1-seanjc@google.com> Mime-Version: 1.0 References: <20221130230934.1014142-1-seanjc@google.com> X-Mailer: git-send-email 2.38.1.584.g0f3c55d4c2-goog Message-ID: <20221130230934.1014142-4-seanjc@google.com> Subject: [PATCH v2 03/50] KVM: Allocate cpus_hardware_enabled after arch hardware setup From: Sean Christopherson To: Paolo Bonzini , Marc Zyngier , Huacai Chen , Aleksandar Markovic , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Matthew Rosato , Eric Farman , Sean Christopherson , Vitaly Kuznetsov , David Woodhouse , Paul Durrant Cc: James Morse , Alexandru Elisei , Suzuki K Poulose , Oliver Upton , Atish Patra , David Hildenbrand , kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, kvmarm@lists.cs.columbia.edu, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, Yuan Yao , Cornelia Huck , Isaku Yamahata , "=?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?=" , Fabiano Rosas , Michael Ellerman , Kai Huang , Chao Gao , Thomas Gleixner Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-s390@vger.kernel.org Allocate cpus_hardware_enabled after arch hardware setup so that arch "init" and "hardware setup" are called back-to-back and thus can be combined in a future patch. cpus_hardware_enabled is never used before kvm_create_vm(), i.e. doesn't have a dependency with hardware setup and only needs to be allocated before /dev/kvm is exposed to userspace. Free the object before the arch hooks are invoked to maintain symmetry, and so that arch code can move away from the hooks without having to worry about ordering changes. Signed-off-by: Sean Christopherson Reviewed-by: Yuan Yao --- virt/kvm/kvm_main.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 43e2e4f38151..ded88ad6c2d8 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -5862,15 +5862,15 @@ int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align, if (r) return r; + r = kvm_arch_hardware_setup(opaque); + if (r < 0) + goto err_hw_setup; + if (!zalloc_cpumask_var(&cpus_hardware_enabled, GFP_KERNEL)) { r = -ENOMEM; goto err_hw_enabled; } - r = kvm_arch_hardware_setup(opaque); - if (r < 0) - goto out_free_1; - c.ret = &r; c.opaque = opaque; for_each_online_cpu(cpu) { @@ -5956,10 +5956,10 @@ int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align, unregister_reboot_notifier(&kvm_reboot_notifier); cpuhp_remove_state_nocalls(CPUHP_AP_KVM_STARTING); out_free_2: - kvm_arch_hardware_unsetup(); -out_free_1: free_cpumask_var(cpus_hardware_enabled); err_hw_enabled: + kvm_arch_hardware_unsetup(); +err_hw_setup: kvm_arch_exit(); return r; } @@ -5986,9 +5986,9 @@ void kvm_exit(void) cpuhp_remove_state_nocalls(CPUHP_AP_KVM_STARTING); on_each_cpu(hardware_disable_nolock, NULL, 1); kvm_irqfd_exit(); + free_cpumask_var(cpus_hardware_enabled); kvm_arch_hardware_unsetup(); kvm_arch_exit(); - free_cpumask_var(cpus_hardware_enabled); kvm_vfio_ops_exit(); } EXPORT_SYMBOL_GPL(kvm_exit); -- 2.38.1.584.g0f3c55d4c2-goog