From patchwork Thu Apr 21 05:12:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxim Levitsky X-Patchwork-Id: 12821094 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 499D7C43217 for ; Thu, 21 Apr 2022 05:14:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1384350AbiDUFQq (ORCPT ); Thu, 21 Apr 2022 01:16:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49812 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1384251AbiDUFQ2 (ORCPT ); Thu, 21 Apr 2022 01:16:28 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id E0C2ADED5 for ; Wed, 20 Apr 2022 22:13:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1650518017; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=bFfak0fL1x1PD2NGlDq0gbCHu4stLjWexcxTqgBpjZU=; b=IxDvtY4pLKokF401M+qD8TDKUBa/eBcQKmJHGLKO21pLWioNCQ+hMOK/GQ1TiSXbQTiAe0 vBoAhPUWvP4msHesoZzToT/tBWFg2sCNYYN2VR2xfL9LyK1L1ROgXL/9dAsQCmJ6HkQ/qn 3qJ8Fs0nIz4DlQ4T2a4ZJfAV4GOp238= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-210-E-cy5rt1PnWU_0o6vX-bsg-1; Thu, 21 Apr 2022 01:13:33 -0400 X-MC-Unique: E-cy5rt1PnWU_0o6vX-bsg-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 16E3D8038E3; Thu, 21 Apr 2022 05:13:32 +0000 (UTC) Received: from localhost.localdomain (unknown [10.40.194.231]) by smtp.corp.redhat.com (Postfix) with ESMTP id BD2DE145BA5A; Thu, 21 Apr 2022 05:13:26 +0000 (UTC) From: Maxim Levitsky To: kvm@vger.kernel.org Cc: Rodrigo Vivi , Paolo Bonzini , intel-gfx@lists.freedesktop.org, Joonas Lahtinen , Jani Nikula , Thomas Gleixner , linux-kernel@vger.kernel.org, Wanpeng Li , Jim Mattson , Tvrtko Ursulin , "H. Peter Anvin" , Vitaly Kuznetsov , Zhi Wang , Daniel Vetter , intel-gvt-dev@lists.freedesktop.org, dri-devel@lists.freedesktop.org, x86@kernel.org, David Airlie , Sean Christopherson , Ingo Molnar , Joerg Roedel , Dave Hansen , Borislav Petkov , Zhenyu Wang , Maxim Levitsky Subject: [RFC PATCH v2 07/10] KVM: x86: SVM: move avic state to separate struct Date: Thu, 21 Apr 2022 08:12:41 +0300 Message-Id: <20220421051244.187733-8-mlevitsk@redhat.com> In-Reply-To: <20220421051244.187733-1-mlevitsk@redhat.com> References: <20220421051244.187733-1-mlevitsk@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.85 on 10.11.54.7 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This will make the code a bit easier to read when nested AVIC support is added. No functional change intended. Signed-off-by: Maxim Levitsky --- arch/x86/kvm/svm/avic.c | 49 +++++++++++++++++++++++------------------ arch/x86/kvm/svm/svm.h | 14 +++++++----- 2 files changed, 36 insertions(+), 27 deletions(-) diff --git a/arch/x86/kvm/svm/avic.c b/arch/x86/kvm/svm/avic.c index f375ca1d6518e..87756237c646d 100644 --- a/arch/x86/kvm/svm/avic.c +++ b/arch/x86/kvm/svm/avic.c @@ -69,6 +69,8 @@ int avic_ga_log_notifier(u32 ga_tag) unsigned long flags; struct kvm_svm *kvm_svm; struct kvm_vcpu *vcpu = NULL; + struct kvm_svm_avic *avic; + u32 vm_id = AVIC_GATAG_TO_VMID(ga_tag); u32 vcpu_id = AVIC_GATAG_TO_VCPUID(ga_tag); @@ -76,9 +78,13 @@ int avic_ga_log_notifier(u32 ga_tag) trace_kvm_avic_ga_log(vm_id, vcpu_id); spin_lock_irqsave(&svm_vm_data_hash_lock, flags); - hash_for_each_possible(svm_vm_data_hash, kvm_svm, hnode, vm_id) { - if (kvm_svm->avic_vm_id != vm_id) + hash_for_each_possible(svm_vm_data_hash, avic, hnode, vm_id) { + + + if (avic->vm_id != vm_id) continue; + + kvm_svm = container_of(avic, struct kvm_svm, avic); vcpu = kvm_get_vcpu_by_id(&kvm_svm->kvm, vcpu_id); break; } @@ -98,18 +104,18 @@ int avic_ga_log_notifier(u32 ga_tag) void avic_vm_destroy(struct kvm *kvm) { unsigned long flags; - struct kvm_svm *kvm_svm = to_kvm_svm(kvm); + struct kvm_svm_avic *avic = &to_kvm_svm(kvm)->avic; if (!enable_apicv) return; - if (kvm_svm->avic_logical_id_table_page) - __free_page(kvm_svm->avic_logical_id_table_page); - if (kvm_svm->avic_physical_id_table_page) - __free_page(kvm_svm->avic_physical_id_table_page); + if (avic->logical_id_table_page) + __free_page(avic->logical_id_table_page); + if (avic->physical_id_table_page) + __free_page(avic->physical_id_table_page); spin_lock_irqsave(&svm_vm_data_hash_lock, flags); - hash_del(&kvm_svm->hnode); + hash_del(&avic->hnode); spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags); } @@ -117,10 +123,9 @@ int avic_vm_init(struct kvm *kvm) { unsigned long flags; int err = -ENOMEM; - struct kvm_svm *kvm_svm = to_kvm_svm(kvm); - struct kvm_svm *k2; struct page *p_page; struct page *l_page; + struct kvm_svm_avic *avic = &to_kvm_svm(kvm)->avic; u32 vm_id; if (!enable_apicv) @@ -131,14 +136,14 @@ int avic_vm_init(struct kvm *kvm) if (!p_page) goto free_avic; - kvm_svm->avic_physical_id_table_page = p_page; + avic->physical_id_table_page = p_page; /* Allocating logical APIC ID table (4KB) */ l_page = alloc_page(GFP_KERNEL_ACCOUNT | __GFP_ZERO); if (!l_page) goto free_avic; - kvm_svm->avic_logical_id_table_page = l_page; + avic->logical_id_table_page = l_page; spin_lock_irqsave(&svm_vm_data_hash_lock, flags); again: @@ -149,13 +154,15 @@ int avic_vm_init(struct kvm *kvm) } /* Is it still in use? Only possible if wrapped at least once */ if (next_vm_id_wrapped) { - hash_for_each_possible(svm_vm_data_hash, k2, hnode, vm_id) { - if (k2->avic_vm_id == vm_id) + struct kvm_svm_avic *avic2; + + hash_for_each_possible(svm_vm_data_hash, avic2, hnode, vm_id) { + if (avic2->vm_id == vm_id) goto again; } } - kvm_svm->avic_vm_id = vm_id; - hash_add(svm_vm_data_hash, &kvm_svm->hnode, kvm_svm->avic_vm_id); + avic->vm_id = vm_id; + hash_add(svm_vm_data_hash, &avic->hnode, avic->vm_id); spin_unlock_irqrestore(&svm_vm_data_hash_lock, flags); return 0; @@ -169,8 +176,8 @@ void avic_init_vmcb(struct vcpu_svm *svm, struct vmcb *vmcb) { struct kvm_svm *kvm_svm = to_kvm_svm(svm->vcpu.kvm); phys_addr_t bpa = __sme_set(page_to_phys(svm->avic_backing_page)); - phys_addr_t lpa = __sme_set(page_to_phys(kvm_svm->avic_logical_id_table_page)); - phys_addr_t ppa = __sme_set(page_to_phys(kvm_svm->avic_physical_id_table_page)); + phys_addr_t lpa = __sme_set(page_to_phys(kvm_svm->avic.logical_id_table_page)); + phys_addr_t ppa = __sme_set(page_to_phys(kvm_svm->avic.physical_id_table_page)); vmcb->control.avic_backing_page = bpa & AVIC_HPA_MASK; vmcb->control.avic_logical_id = lpa & AVIC_HPA_MASK; @@ -193,7 +200,7 @@ static u64 *avic_get_physical_id_entry(struct kvm_vcpu *vcpu, if (index >= AVIC_MAX_PHYSICAL_ID_COUNT) return NULL; - avic_physical_id_table = page_address(kvm_svm->avic_physical_id_table_page); + avic_physical_id_table = page_address(kvm_svm->avic.physical_id_table_page); return &avic_physical_id_table[index]; } @@ -387,7 +394,7 @@ static u32 *avic_get_logical_id_entry(struct kvm_vcpu *vcpu, u32 ldr, bool flat) index = (cluster << 2) + apic; } - logical_apic_id_table = (u32 *) page_address(kvm_svm->avic_logical_id_table_page); + logical_apic_id_table = (u32 *) page_address(kvm_svm->avic.logical_id_table_page); return &logical_apic_id_table[index]; } @@ -737,7 +744,7 @@ int avic_pi_update_irte(struct kvm *kvm, unsigned int host_irq, /* Try to enable guest_mode in IRTE */ pi.base = __sme_set(page_to_phys(svm->avic_backing_page) & AVIC_HPA_MASK); - pi.ga_tag = AVIC_GATAG(to_kvm_svm(kvm)->avic_vm_id, + pi.ga_tag = AVIC_GATAG(to_kvm_svm(kvm)->avic.vm_id, svm->vcpu.vcpu_id); pi.is_guest_mode = true; pi.vcpu_data = &vcpu_info; diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h index e246793cbeaeb..96390fa5e3917 100644 --- a/arch/x86/kvm/svm/svm.h +++ b/arch/x86/kvm/svm/svm.h @@ -88,15 +88,17 @@ struct kvm_sev_info { atomic_t migration_in_progress; }; -struct kvm_svm { - struct kvm kvm; - /* Struct members for AVIC */ - u32 avic_vm_id; - struct page *avic_logical_id_table_page; - struct page *avic_physical_id_table_page; +struct kvm_svm_avic { + u32 vm_id; + struct page *logical_id_table_page; + struct page *physical_id_table_page; struct hlist_node hnode; +}; +struct kvm_svm { + struct kvm kvm; + struct kvm_svm_avic avic; struct kvm_sev_info sev_info; };