From nobody Mon Feb 9 16:06:32 2026 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 9EA06C4332F for ; Wed, 2 Nov 2022 23:22:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231379AbiKBXW0 (ORCPT ); Wed, 2 Nov 2022 19:22:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32824 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231354AbiKBXUi (ORCPT ); Wed, 2 Nov 2022 19:20:38 -0400 Received: from mail-pj1-x1049.google.com (mail-pj1-x1049.google.com [IPv6:2607:f8b0:4864:20::1049]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BCF979FD2 for ; Wed, 2 Nov 2022 16:19:54 -0700 (PDT) Received: by mail-pj1-x1049.google.com with SMTP id nl16-20020a17090b385000b002138288fd51so2482417pjb.6 for ; Wed, 02 Nov 2022 16:19:54 -0700 (PDT) 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=yE/4Y9j/oYhrNnppN3pBbrFR3yZQeQID1rXlzF1UIrs=; b=ay8cPyDCIqaMfo0DK1yGgX9Wb9Bl9/1fVHbdhv2aAy1cj0+xuZ97OrHcZUeV1cFb37 6xEzJJ8+vktqwJnTtuH1USFvq8dlhSmN+zODY90fpIycgDYl660YnoWyBjRJ4shxmyzm eiIMz6ZQ5l1bjRGivO4fA9kceUx/9ETkzTfr9tWJ9HyO6sppdHxDi6fl6UdHy8ptqT6P DK4l+CKIMpqMLCpZJAWwhuO/obSacLjdsxWR0MNI7G5lNuNRlHspSUm1vSdSmF25/DFv q5eNxeOVs/atfRGxPMYHZj9KnffzNZveBs/Mh+BUBe8auRPPWp99Q7jjD7exn9MfTR0m 9eDg== 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=yE/4Y9j/oYhrNnppN3pBbrFR3yZQeQID1rXlzF1UIrs=; b=osdmG+gMDwTiB8mLAmJb2vfGLQa54J9YD+jd0l3ptPjIsmNzM8Gf3VY1nVVIqHTCun 6LlYtC8uuRbhh/nJb2VqUyr0iDkOcBjyT3bZh7EzT+P8VYrzsynxioPWGMXH0zn3Ot9k E+Rnmzp1GNDWDJX3eDW0Ojo/XhQxYChJyNKwQi+7c0rHe2paU58OzqnMy5qq9iOdC5AN 0ShzN4DddQU+8CglcbdJxkyGkWQrcSWhp6JP4bWVMaesYK2kR2cGF/DRA3XnCgywioQl fbxcPf2QSAY+/VZW3OXJbXX5EwFuNEacvBPRnBh6UQ1E1j3p895l9u2hVryFBeqaDKHA 4GWw== X-Gm-Message-State: ACrzQf3LC+Ocxwi7D0AZpHyZeo0nJBLCfQ6LFtVSLQHtrHxXCbfA2zS2 Xbgpx53q5OHzI3TBDk3eUxYE9dVlMkY= X-Google-Smtp-Source: AMsMyM5/m9Qv5qe0i9jmB6ZTvP1qiSAaI3rCUeMWt3X4Tz8UOP4pahzgtmW58pUMKKKCCfw0sH3ElrsKh+M= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a62:d412:0:b0:56c:6f25:8b12 with SMTP id a18-20020a62d412000000b0056c6f258b12mr27322827pfh.60.1667431181026; Wed, 02 Nov 2022 16:19:41 -0700 (PDT) Reply-To: Sean Christopherson Date: Wed, 2 Nov 2022 23:18:43 +0000 In-Reply-To: <20221102231911.3107438-1-seanjc@google.com> Mime-Version: 1.0 References: <20221102231911.3107438-1-seanjc@google.com> X-Mailer: git-send-email 2.38.1.431.g37b22c650d-goog Message-ID: <20221102231911.3107438-17-seanjc@google.com> Subject: [PATCH 16/44] KVM: arm64: Unregister perf callbacks if hypervisor finalization fails 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 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, Isaku Yamahata , Fabiano Rosas , Michael Ellerman , Chao Gao , Thomas Gleixner , Yuan Yao Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Undo everything done by init_subsystems() if a later initialization step fails, i.e. unregister perf callbacks in addition to unregistering the power management notifier. Fixes: bfa79a805454 ("KVM: arm64: Elevate hypervisor mappings creation at E= L2") Signed-off-by: Sean Christopherson --- arch/arm64/kvm/arm.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 73644def7780..f400a8c029dd 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -1839,12 +1839,21 @@ static int init_subsystems(void) kvm_register_perf_callbacks(NULL); =20 out: + if (err) + hyp_cpu_pm_exit(); + if (err || !is_protected_kvm_enabled()) on_each_cpu(_kvm_arch_hardware_disable, NULL, 1); =20 return err; } =20 +static void teardown_subsystems(void) +{ + kvm_unregister_perf_callbacks(); + hyp_cpu_pm_exit(); +} + static void teardown_hyp_mode(void) { int cpu; @@ -2237,7 +2246,7 @@ int kvm_arch_init(void *opaque) =20 err =3D init_subsystems(); if (err) - goto out_subs; + goto out_hyp; =20 if (!in_hyp_mode) { err =3D finalize_hyp_mode(); @@ -2258,7 +2267,7 @@ int kvm_arch_init(void *opaque) return 0; =20 out_subs: - hyp_cpu_pm_exit(); + teardown_subsystems(); out_hyp: if (!in_hyp_mode) teardown_hyp_mode(); --=20 2.38.1.431.g37b22c650d-goog