From patchwork Sun Nov 23 17:57:00 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Auger X-Patchwork-Id: 5362061 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id CA1BC9F39D for ; Sun, 23 Nov 2014 18:01:14 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id DDEED20268 for ; Sun, 23 Nov 2014 18:01:13 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E37C120266 for ; Sun, 23 Nov 2014 18:01:12 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XsbRR-0001rr-5b; Sun, 23 Nov 2014 17:59:21 +0000 Received: from mail-wg0-f51.google.com ([74.125.82.51]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XsbRB-0001kj-IO for linux-arm-kernel@lists.infradead.org; Sun, 23 Nov 2014 17:59:06 +0000 Received: by mail-wg0-f51.google.com with SMTP id k14so10300226wgh.24 for ; Sun, 23 Nov 2014 09:58:41 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=HUprM28M7jFgQ3cKFiwnR4M1qOB5eONnUxJ0VgzseQ4=; b=GlbWxAb59uuosCLxq0WDfpGL6hT7CyRQA+fopVWZ09SgQQ5Ibx0EL049NKbGYZmgoL hD3gAiPG70Gjm27jO92rf+wQ4yypt3EMTp+nkWLb1GazMX/El4CaBOMpZ8iWOaRD3hW0 RF50mK16BFEF1s5Nvtp5NfZnx0yZW7UwGgMmemKURKCB7sikGg2znAw74P0+lNio5HYz ydsjpQVjAd5S3ZBjNiG0WlTdqOk79xrUVcegD8VpIq0fX5AFltW1JWmxM3Sb1xRDNPeI thfax4Y7SomddUFhj1QPma1pqNkYsgUrehbiS5HUYlAcTsqX7AXH6y6VOVP1R9m667qh wAbA== X-Gm-Message-State: ALoCoQk1NznbosfuwxyYig6HtCI0GCYQ1RkHJeUxQZBzAsj6IfO1ag5kPyy5uk4yBo5odqLW+LNY X-Received: by 10.194.193.38 with SMTP id hl6mr26942964wjc.38.1416765521474; Sun, 23 Nov 2014 09:58:41 -0800 (PST) Received: from gnx2579.gnb.st.com (weg38-3-78-232-41-119.fbx.proxad.net. [78.232.41.119]) by mx.google.com with ESMTPSA id vy7sm17407686wjc.27.2014.11.23.09.58.39 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sun, 23 Nov 2014 09:58:40 -0800 (PST) From: Eric Auger To: eric.auger@st.com, eric.auger@linaro.org, christoffer.dall@linaro.org, marc.zyngier@arm.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, alex.williamson@redhat.com, joel.schopp@amd.com, kim.phillips@freescale.com, paulus@samba.org, gleb@kernel.org, pbonzini@redhat.com Subject: [PATCH v4 3/3] KVM: arm64: add irqfd support Date: Sun, 23 Nov 2014 18:57:00 +0100 Message-Id: <1416765420-12057-4-git-send-email-eric.auger@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1416765420-12057-1-git-send-email-eric.auger@linaro.org> References: <1416765420-12057-1-git-send-email-eric.auger@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20141123_095905_856314_FD68527F X-CRM114-Status: GOOD ( 12.62 ) X-Spam-Score: -0.7 (/) Cc: feng.wu@intel.com, patches@linaro.org, john.liuli@huawei.com, ming.lei@canonical.com, will.deacon@arm.com, a.rigo@virtualopensystems.com, linux-kernel@vger.kernel.org, a.motakis@virtualopensystems.com X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_LOW, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Joel Schopp This patch enables irqfd for arm64. Signed-off-by: Joel Schopp Signed-off-by: Eric Auger --- [Eric Auger] - originates from Joel's [RFC PATCH] arm64: KVM: add irqfd support http://www.spinics.net/lists/kvm-arm/msg10798.html - isolates modifications really related to irqfd --- Documentation/virtual/kvm/api.txt | 4 ++-- arch/arm64/include/uapi/asm/kvm.h | 3 +++ arch/arm64/kvm/Kconfig | 2 ++ arch/arm64/kvm/Makefile | 2 +- 4 files changed, 8 insertions(+), 3 deletions(-) diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index 4deccc0..c76ce04 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -2206,7 +2206,7 @@ into the hash PTE second double word). 4.75 KVM_IRQFD Capability: KVM_CAP_IRQFD -Architectures: x86 s390 arm +Architectures: x86 s390 arm arm64 Type: vm ioctl Parameters: struct kvm_irqfd (in) Returns: 0 on success, -1 on error @@ -2232,7 +2232,7 @@ Note that closing the resamplefd is not sufficient to disable the irqfd. The KVM_IRQFD_FLAG_RESAMPLE is only necessary on assignment and need not be specified with KVM_IRQFD_FLAG_DEASSIGN. -On arm, the gsi must be a shared peripheral interrupt (SPI). +On arm/arm64, the gsi must be a shared peripheral interrupt (SPI). This means the corresponding programmed GIC interrupt ID is gsi+32. 4.76 KVM_PPC_ALLOCATE_HTAB diff --git a/arch/arm64/include/uapi/asm/kvm.h b/arch/arm64/include/uapi/asm/kvm.h index 8e38878..1ed4417 100644 --- a/arch/arm64/include/uapi/asm/kvm.h +++ b/arch/arm64/include/uapi/asm/kvm.h @@ -182,6 +182,9 @@ struct kvm_arch_memory_slot { /* Highest supported SPI, from VGIC_NR_IRQS */ #define KVM_ARM_IRQ_GIC_MAX 127 +/* One single KVM irqchip, ie. the VGIC */ +#define KVM_NR_IRQCHIPS 1 + /* PSCI interface */ #define KVM_PSCI_FN_BASE 0x95c1ba5e #define KVM_PSCI_FN(n) (KVM_PSCI_FN_BASE + (n)) diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig index 279e1a0..09c25c2 100644 --- a/arch/arm64/kvm/Kconfig +++ b/arch/arm64/kvm/Kconfig @@ -26,6 +26,7 @@ config KVM select KVM_ARM_HOST select KVM_ARM_VGIC select KVM_ARM_TIMER + select HAVE_KVM_EVENTFD ---help--- Support hosting virtualized guest machines. @@ -50,6 +51,7 @@ config KVM_ARM_MAX_VCPUS config KVM_ARM_VGIC bool depends on KVM_ARM_HOST && OF + select HAVE_KVM_IRQFD ---help--- Adds support for a hardware assisted, in-kernel GIC emulation. diff --git a/arch/arm64/kvm/Makefile b/arch/arm64/kvm/Makefile index 32a0961..2e6b827 100644 --- a/arch/arm64/kvm/Makefile +++ b/arch/arm64/kvm/Makefile @@ -11,7 +11,7 @@ ARM=../../../arch/arm/kvm obj-$(CONFIG_KVM_ARM_HOST) += kvm.o -kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/kvm_main.o $(KVM)/coalesced_mmio.o +kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/kvm_main.o $(KVM)/coalesced_mmio.o $(KVM)/eventfd.o kvm-$(CONFIG_KVM_ARM_HOST) += $(ARM)/arm.o $(ARM)/mmu.o $(ARM)/mmio.o kvm-$(CONFIG_KVM_ARM_HOST) += $(ARM)/psci.o $(ARM)/perf.o