From nobody Mon Feb 9 07:22:54 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1568217305; cv=none; d=zoho.com; s=zohoarc; b=dDPzA8is3eCBBKiotfnzqlqJwC980h/stQ2UPnO2VKSiasjphaIjS9xIUjsUSszQCE0giaLNCgy2teGCVKIavPp+K0BXBSecBcIDTkpFh7JAKVj/p8NIJFF0lr8CdjNSe2xnUcAcil1QdhpvGGBydqGCcOb0SetbMEFQBR/B7pc= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1568217305; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To:ARC-Authentication-Results; bh=jK1NDxcmxoKmiez8HqSYx3CbAZD9ZZWDDJpTkK8T83c=; b=EGrMzX2NMEEXoaNEkt5C1+0SfQPjwzYv5eSk0C+LOotY6RsA86jkZ1tuYFKpNlXpCj4lKLNyykAmHyHQzRpk0Wv9w6/GFQAkpEsjq2KWP9K/9a8WwY6OSErLV7LU1/G2RipeprLSni9KyEtB3BIRjDv/oQvUMJaIuEb9kJcjSt4= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1568217305764788.1891666042008; Wed, 11 Sep 2019 08:55:05 -0700 (PDT) Received: from localhost ([::1]:52934 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i84xT-00059o-Vz for importer@patchew.org; Wed, 11 Sep 2019 11:55:04 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:59908) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i84uK-0002HN-8g for qemu-devel@nongnu.org; Wed, 11 Sep 2019 11:51:49 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i84uI-00037e-Pc for qemu-devel@nongnu.org; Wed, 11 Sep 2019 11:51:48 -0400 Received: from mx1.redhat.com ([209.132.183.28]:50088) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i84uE-00035N-3z; Wed, 11 Sep 2019 11:51:42 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 6DA4B10CC1F1; Wed, 11 Sep 2019 15:51:41 +0000 (UTC) Received: from laptop.redhat.com (ovpn-116-168.ams2.redhat.com [10.36.116.168]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1304E60872; Wed, 11 Sep 2019 15:51:38 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, peter.maydell@linaro.org Date: Wed, 11 Sep 2019 17:51:24 +0200 Message-Id: <20190911155125.11932-3-eric.auger@redhat.com> In-Reply-To: <20190911155125.11932-1-eric.auger@redhat.com> References: <20190911155125.11932-1-eric.auger@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.65]); Wed, 11 Sep 2019 15:51:41 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [RFC v2 2/3] intc/arm_gic: Support IRQ injection for more than 256 vpus X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: yuzenghui@huawei.com, maz@kernel.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" Host kernels that expose the KVM_CAP_ARM_IRQ_LINE_LAYOUT_2 capability allow injection of interrupts along with vcpu ids larger than 255. Let's encode the vpcu id on 12 bits according to the upgraded KVM_IRQ_LINE ABI when needed. Given that we have two callsites that need to assemble the value for kvm_set_irq(), a new helper routine, kvm_arm_set_irq is introduced. Without that patch qemu exits with "kvm_set_irq: Invalid argument" message. Signed-off-by: Eric Auger Reported-by: Zenghui Yu --- hw/intc/arm_gic_kvm.c | 7 ++----- target/arm/cpu.c | 10 ++++------ target/arm/kvm.c | 16 ++++++++++++++++ target/arm/kvm_arm.h | 1 + 4 files changed, 23 insertions(+), 11 deletions(-) diff --git a/hw/intc/arm_gic_kvm.c b/hw/intc/arm_gic_kvm.c index b56fda144f..9deb15e7e6 100644 --- a/hw/intc/arm_gic_kvm.c +++ b/hw/intc/arm_gic_kvm.c @@ -55,7 +55,7 @@ void kvm_arm_gic_set_irq(uint32_t num_irq, int irq, int l= evel) * has separate fields in the irq number for type, * CPU number and interrupt number. */ - int kvm_irq, irqtype, cpu; + int irqtype, cpu; =20 if (irq < (num_irq - GIC_INTERNAL)) { /* External interrupt. The kernel numbers these like the GIC @@ -72,10 +72,7 @@ void kvm_arm_gic_set_irq(uint32_t num_irq, int irq, int = level) cpu =3D irq / GIC_INTERNAL; irq %=3D GIC_INTERNAL; } - kvm_irq =3D (irqtype << KVM_ARM_IRQ_TYPE_SHIFT) - | (cpu << KVM_ARM_IRQ_VCPU_SHIFT) | irq; - - kvm_set_irq(kvm_state, kvm_irq, !!level); + kvm_arm_set_irq(cpu, irqtype, irq, !!level); } =20 static void kvm_arm_gicv2_set_irq(void *opaque, int irq, int level) diff --git a/target/arm/cpu.c b/target/arm/cpu.c index 2399c14471..13813fb213 100644 --- a/target/arm/cpu.c +++ b/target/arm/cpu.c @@ -576,16 +576,16 @@ static void arm_cpu_kvm_set_irq(void *opaque, int irq= , int level) ARMCPU *cpu =3D opaque; CPUARMState *env =3D &cpu->env; CPUState *cs =3D CPU(cpu); - int kvm_irq =3D KVM_ARM_IRQ_TYPE_CPU << KVM_ARM_IRQ_TYPE_SHIFT; uint32_t linestate_bit; + int irq_id; =20 switch (irq) { case ARM_CPU_IRQ: - kvm_irq |=3D KVM_ARM_IRQ_CPU_IRQ; + irq_id =3D KVM_ARM_IRQ_CPU_IRQ; linestate_bit =3D CPU_INTERRUPT_HARD; break; case ARM_CPU_FIQ: - kvm_irq |=3D KVM_ARM_IRQ_CPU_FIQ; + irq_id =3D KVM_ARM_IRQ_CPU_FIQ; linestate_bit =3D CPU_INTERRUPT_FIQ; break; default: @@ -597,9 +597,7 @@ static void arm_cpu_kvm_set_irq(void *opaque, int irq, = int level) } else { env->irq_line_state &=3D ~linestate_bit; } - - kvm_irq |=3D cs->cpu_index << KVM_ARM_IRQ_VCPU_SHIFT; - kvm_set_irq(kvm_state, kvm_irq, level ? 1 : 0); + kvm_arm_set_irq(cs->cpu_index, KVM_ARM_IRQ_TYPE_CPU, irq_id, !!level); #endif } =20 diff --git a/target/arm/kvm.c b/target/arm/kvm.c index b2eaa50b8d..6cdfa2204f 100644 --- a/target/arm/kvm.c +++ b/target/arm/kvm.c @@ -744,6 +744,22 @@ int kvm_arm_vgic_probe(void) } } =20 +int kvm_arm_set_irq(int cpu, int irqtype, int irq, int level) +{ + int kvm_irq =3D 0; + + kvm_irq =3D (irqtype << KVM_ARM_IRQ_TYPE_SHIFT) | irq; + + if (cpu !=3D 0) { + int cpu_idx2 =3D cpu / 256; + int cpu_idx1 =3D cpu % 256; + + kvm_irq |=3D (cpu_idx1 << KVM_ARM_IRQ_VCPU_SHIFT) | + ((cpu_idx2 & KVM_ARM_IRQ_VCPU2_MASK) << KVM_ARM_IRQ_VCPU2_SHIFT= ); + } + return kvm_set_irq(kvm_state, kvm_irq, !!level); +} + int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route, uint64_t address, uint32_t data, PCIDevice *d= ev) { diff --git a/target/arm/kvm_arm.h b/target/arm/kvm_arm.h index b3106c8600..b4e19457a0 100644 --- a/target/arm/kvm_arm.h +++ b/target/arm/kvm_arm.h @@ -253,6 +253,7 @@ int kvm_arm_vgic_probe(void); =20 void kvm_arm_pmu_set_irq(CPUState *cs, int irq); void kvm_arm_pmu_init(CPUState *cs); +int kvm_arm_set_irq(int cpu, int irqtype, int irq, int level); =20 #else =20 --=20 2.20.1