From patchwork Wed Nov 2 23:18:44 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Christopherson X-Patchwork-Id: 13029172 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 9085DC4167B for ; Wed, 2 Nov 2022 23:20:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230303AbiKBXUp (ORCPT ); Wed, 2 Nov 2022 19:20:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34108 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229487AbiKBXUO (ORCPT ); Wed, 2 Nov 2022 19:20:14 -0400 Received: from mail-pl1-x64a.google.com (mail-pl1-x64a.google.com [IPv6:2607:f8b0:4864:20::64a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 374CD5F7F for ; Wed, 2 Nov 2022 16:19:43 -0700 (PDT) Received: by mail-pl1-x64a.google.com with SMTP id b2-20020a170902d50200b001871a3c51afso228499plg.8 for ; Wed, 02 Nov 2022 16:19:43 -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=KSp9zIzHXrxcJceHX59wYlpimn2+3DBl6/EkdM22YDo=; b=GazJIJPM/pHmiFZ05wEIEUmIWAlYuh2ZlyTopcNekluhV4UHGi1yTDkMNANFS1jscV sHaoW06GH/7QoV/u1MZ9MSnC1FGAiLQO/y23W8/5eah4jm88WvvNxPaF2O5WlqNX6AA2 8Gs4UT7UUi7/ZwHf5DCZWbM2vulQhHbwn2WtGD6rJzl/FOBfxZ8G3NM+geD74+eDAUum o1o3demNZa7SFz5SsAwJ7XKog0NdlraaEfYhRzZpffEE3gOpiTfLkShIIvuV3L13yEjN xam914sm21iReYi10+r23ej5bJnTbIKx2d2irwZwjp5ibbzs0gCmvLJoawOipg8dYos5 2Zgg== 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=KSp9zIzHXrxcJceHX59wYlpimn2+3DBl6/EkdM22YDo=; b=lSUrk9h2xVzj/tKtAOQQKVLiX2AiRSNxsz9ufs71xP2xyiX0f6rIOqJDQicVJkA2nj F4X0sth7aT/MDH2/xXB44BIQBgR1tm87aF7li4mfCe8a+8YqOqSszZlwHCmqJCrAfJMU MsFhlfQ8r+pxuVs2u1qCUVRYfhRk0R/XgxUgjD8gidnVhWShkZ50y4GcG9XgnlUVSwD3 S8he1HUSMytfBROTVP9+rwIOJWUqTNdJqT9BpdxWO3c2fR3cxgoaGLIqCETmpH/tcoSP La8N0HT/ZxceFw5RUFi+fyEoKt5GRJO7JjImeVGUvDBVF8NKxFRYd43yxHxdyRYbc9+3 Wrtg== X-Gm-Message-State: ACrzQf3o/OdXbjQE8xCfnq5eB0TB1Wcscb+Ha2yhVf13YwEz7J8bg6mY 4qLbHr4Z5FyqLwuw/mwtVNKmkXazkX8= X-Google-Smtp-Source: AMsMyM5Lv2JMFeAlRDTbvWUtcHml4s/PYrbj2uJcHSHWkZsi31gUm2Ed915QDdWGieIzAX5rFOQTrQSszmI= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a05:6a00:e0b:b0:56c:8c13:2a54 with SMTP id bq11-20020a056a000e0b00b0056c8c132a54mr27442020pfb.17.1667431182821; Wed, 02 Nov 2022 16:19:42 -0700 (PDT) Reply-To: Sean Christopherson Date: Wed, 2 Nov 2022 23:18:44 +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: <20221102231911.3107438-18-seanjc@google.com> Subject: [PATCH 17/44] KVM: arm64: Do arm/arch initialiation without bouncing through kvm_init() 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-mips@vger.kernel.org Move arm/arch specific initialization directly in arm's module_init(), now called kvm_arm_init(), instead of bouncing through kvm_init() to reach kvm_arch_init(). Invoking kvm_arch_init() is the very first action performed by kvm_init(), i.e. this is a glorified nop. Making kvm_arch_init() a nop will allow dropping it entirely once all other architectures follow suit. No functional change intended. Signed-off-by: Sean Christopherson --- arch/arm64/kvm/arm.c | 25 ++++++++++++++++--------- 1 file changed, 16 insertions(+), 9 deletions(-) diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index f400a8c029dd..bfa2dcd3db11 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -2190,7 +2190,7 @@ void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *cons) /** * Initialize Hyp-mode and memory mappings on all CPUs. */ -int kvm_arch_init(void *opaque) +int kvm_arm_init(void) { int err; bool in_hyp_mode; @@ -2264,6 +2264,14 @@ int kvm_arch_init(void *opaque) kvm_info("Hyp mode initialized successfully\n"); } + /* + * FIXME: Do something reasonable if kvm_init() fails after pKVM + * hypervisor protection is finalized. + */ + err = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); + if (err) + goto out_subs; + return 0; out_subs: @@ -2276,10 +2284,15 @@ int kvm_arch_init(void *opaque) return err; } +int kvm_arch_init(void *opaque) +{ + return 0; +} + /* NOP: Compiling as a module not supported */ void kvm_arch_exit(void) { - kvm_unregister_perf_callbacks(); + } static int __init early_kvm_mode_cfg(char *arg) @@ -2320,10 +2333,4 @@ enum kvm_mode kvm_get_mode(void) return kvm_mode; } -static int arm_init(void) -{ - int rc = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); - return rc; -} - -module_init(arm_init); +module_init(kvm_arm_init);