From nobody Thu Apr 9 07:52:54 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 6E2ABC433FE for ; Thu, 3 Nov 2022 15:04:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232032AbiKCPEs (ORCPT ); Thu, 3 Nov 2022 11:04:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43832 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231941AbiKCPDJ (ORCPT ); Thu, 3 Nov 2022 11:03:09 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0B9271900A for ; Thu, 3 Nov 2022 08:02:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1667487726; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=NQfBuXDOrH1Yycxs8u+vcZb8jI8Lwx8edK3ZcCfcDBg=; b=YrJiATz6zie9jzcC40lGlSVZUz9LaW0kbA/9OCG47R8/PwWtTQIa9AYyxdo/5kWct6Q9jb GgJN2YBifV9UPkx4aBch3eDSEneTf2cLWg91SbhO7tzupUrOTZcEVqRIZs3y8271VwbfHm OD3BmrFJp1kO0HwVN6i82rxfgAd5nh8= 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-29-5urxHFDhNc25cYgOjomTUw-1; Thu, 03 Nov 2022 11:02:04 -0400 X-MC-Unique: 5urxHFDhNc25cYgOjomTUw-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 676D61064B5E; Thu, 3 Nov 2022 15:01:52 +0000 (UTC) Received: from virtlab701.virt.lab.eng.bos.redhat.com (virtlab701.virt.lab.eng.bos.redhat.com [10.19.152.228]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5019A200BA7A; Thu, 3 Nov 2022 15:01:52 +0000 (UTC) From: Paolo Bonzini To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Subject: [PATCH] KVM: replace direct irq.h inclusion Date: Thu, 3 Nov 2022 11:01:51 -0400 Message-Id: <20221103150151.4057338-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.4 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" virt/kvm/irqchip.c is including "irq.h" from the arch-specific KVM source directory (i.e. not from arch/*/include) for the sole purpose of retrieving irqchip_in_kernel. Making the function inline in a header that is already included, such as asm/kvm_host.h, is not possible because it needs to look at struct kvm which is defined after asm/kvm_host.h is included. So add a kvm_arch_irqchip_in_kernel non-inline function; irqchip_in_kernel() is only performance critical on arm64 and x86, and the non-inline function is enough on all other architectures. irq.h can then be deleted from all architectures except x86. Signed-off-by: Paolo Bonzini --- arch/arm64/kvm/arm.c | 5 +++++ arch/arm64/kvm/irq.h | 16 ---------------- arch/powerpc/kvm/irq.h | 22 ---------------------- arch/powerpc/kvm/powerpc.c | 18 ++++++++++++++++-- arch/s390/kvm/irq.h | 19 ------------------- arch/s390/kvm/kvm-s390.c | 5 +++++ arch/x86/kvm/irq.c | 5 +++++ include/linux/kvm_host.h | 2 ++ virt/kvm/irqchip.c | 3 +-- 9 files changed, 34 insertions(+), 61 deletions(-) delete mode 100644 arch/arm64/kvm/irq.h delete mode 100644 arch/powerpc/kvm/irq.h delete mode 100644 arch/s390/kvm/irq.h diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 94d33e296e10..7b107fa540fa 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -2130,6 +2130,11 @@ struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, = unsigned long mpidr) return NULL; } =20 +bool kvm_arch_irqchip_in_kernel(struct kvm *kvm) +{ + return irqchip_in_kernel(kvm); +} + bool kvm_arch_has_irq_bypass(void) { return true; diff --git a/arch/arm64/kvm/irq.h b/arch/arm64/kvm/irq.h deleted file mode 100644 index 0d257de42c10..000000000000 --- a/arch/arm64/kvm/irq.h +++ /dev/null @@ -1,16 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * irq.h: in kernel interrupt controller related definitions - * Copyright (c) 2016 Red Hat, Inc. - * - * This header is included by irqchip.c. However, on ARM, interrupt - * controller declarations are located in include/kvm/arm_vgic.h since - * they are mostly shared between arm and arm64. - */ - -#ifndef __IRQ_H -#define __IRQ_H - -#include - -#endif diff --git a/arch/powerpc/kvm/irq.h b/arch/powerpc/kvm/irq.h deleted file mode 100644 index e6463f866abc..000000000000 --- a/arch/powerpc/kvm/irq.h +++ /dev/null @@ -1,22 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef __IRQ_H -#define __IRQ_H - -#include - -static inline int irqchip_in_kernel(struct kvm *kvm) -{ - int ret =3D 0; - -#ifdef CONFIG_KVM_MPIC - ret =3D ret || (kvm->arch.mpic !=3D NULL); -#endif -#ifdef CONFIG_KVM_XICS - ret =3D ret || (kvm->arch.xics !=3D NULL); - ret =3D ret || (kvm->arch.xive !=3D NULL); -#endif - smp_rmb(); - return ret; -} - -#endif diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index b850b0efa201..04494a4fb37a 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -36,7 +36,6 @@ #include =20 #include "timing.h" -#include "irq.h" #include "../mm/mmu_decl.h" =20 #define CREATE_TRACE_POINTS @@ -2165,10 +2164,25 @@ static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_p= vinfo *pvinfo) return 0; } =20 +bool kvm_arch_irqchip_in_kernel(struct kvm *kvm) +{ + int ret =3D 0; + +#ifdef CONFIG_KVM_MPIC + ret =3D ret || (kvm->arch.mpic !=3D NULL); +#endif +#ifdef CONFIG_KVM_XICS + ret =3D ret || (kvm->arch.xics !=3D NULL); + ret =3D ret || (kvm->arch.xive !=3D NULL); +#endif + smp_rmb(); + return ret; +} + int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event, bool line_status) { - if (!irqchip_in_kernel(kvm)) + if (!kvm_arch_irqchip_in_kernel(kvm)) return -ENXIO; =20 irq_event->status =3D kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, diff --git a/arch/s390/kvm/irq.h b/arch/s390/kvm/irq.h deleted file mode 100644 index 484608c71dd0..000000000000 --- a/arch/s390/kvm/irq.h +++ /dev/null @@ -1,19 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * s390 irqchip routines - * - * Copyright IBM Corp. 2014 - * - * Author(s): Cornelia Huck - */ -#ifndef __KVM_IRQ_H -#define __KVM_IRQ_H - -#include - -static inline int irqchip_in_kernel(struct kvm *kvm) -{ - return 1; -} - -#endif diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 45d4b8182b07..b08586bebf78 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -5559,6 +5559,11 @@ vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu= , struct vm_fault *vmf) return VM_FAULT_SIGBUS; } =20 +bool kvm_arch_irqchip_in_kernel(struct kvm *kvm) +{ + return true; +} + /* Section: memory related */ int kvm_arch_prepare_memory_region(struct kvm *kvm, const struct kvm_memory_slot *old, diff --git a/arch/x86/kvm/irq.c b/arch/x86/kvm/irq.c index f371f1292ca3..d8d50558f165 100644 --- a/arch/x86/kvm/irq.c +++ b/arch/x86/kvm/irq.c @@ -165,3 +165,8 @@ bool kvm_arch_irqfd_allowed(struct kvm *kvm, struct kvm= _irqfd *args) =20 return resample ? irqchip_kernel(kvm) : irqchip_in_kernel(kvm); } + +bool kvm_arch_irqchip_in_kernel(struct kvm *kvm) +{ + return irqchip_in_kernel(kvm); +} diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 18592bdf4c1b..12cfc935a9f1 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -653,6 +653,8 @@ struct kvm_irq_routing_table { */ struct hlist_head map[]; }; + +bool kvm_arch_irqchip_in_kernel(struct kvm *kvm); #endif =20 #ifndef KVM_INTERNAL_MEM_SLOTS diff --git a/virt/kvm/irqchip.c b/virt/kvm/irqchip.c index 58e4f88b2b9f..1e567d1f6d3d 100644 --- a/virt/kvm/irqchip.c +++ b/virt/kvm/irqchip.c @@ -17,7 +17,6 @@ #include #include #include -#include "irq.h" =20 int kvm_irq_map_gsi(struct kvm *kvm, struct kvm_kernel_irq_routing_entry *entries, int gsi) @@ -50,7 +49,7 @@ int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_ms= i *msi) { struct kvm_kernel_irq_routing_entry route; =20 - if (!irqchip_in_kernel(kvm) || (msi->flags & ~KVM_MSI_VALID_DEVID)) + if (!kvm_arch_irqchip_in_kernel(kvm) || (msi->flags & ~KVM_MSI_VALID_DEVI= D)) return -EINVAL; =20 route.msi.address_lo =3D msi->address_lo; --=20 2.31.1