From patchwork Fri May 6 10:45:43 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andre Przywara X-Patchwork-Id: 9031101 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id AB2D6BF440 for ; Fri, 6 May 2016 10:46:46 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id CA5D420376 for ; Fri, 6 May 2016 10:46:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B3C032038A for ; Fri, 6 May 2016 10:46:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758304AbcEFKqj (ORCPT ); Fri, 6 May 2016 06:46:39 -0400 Received: from foss.arm.com ([217.140.101.70]:54716 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758362AbcEFKq3 (ORCPT ); Fri, 6 May 2016 06:46:29 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id E642663D; Fri, 6 May 2016 03:46:36 -0700 (PDT) Received: from e104803-lin.lan (unknown [10.1.203.153]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id AF7CA3F252; Fri, 6 May 2016 03:46:27 -0700 (PDT) From: Andre Przywara To: Marc Zyngier , Christoffer Dall Cc: Eric Auger , kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 30/55] KVM: arm/arm64: vgic-new: Add SGIR register handler Date: Fri, 6 May 2016 11:45:43 +0100 Message-Id: <1462531568-9799-31-git-send-email-andre.przywara@arm.com> X-Mailer: git-send-email 2.7.3 In-Reply-To: <1462531568-9799-1-git-send-email-andre.przywara@arm.com> References: <1462531568-9799-1-git-send-email-andre.przywara@arm.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Spam-Status: No, score=-9.0 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, 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 Triggering an IPI via this register is v2 specific, so the implementation lives entirely in vgic-mmio-v2.c. Signed-off-by: Andre Przywara Reviewed-by: Christoffer Dall --- Changelog RFC..v1: - silently return on illegal TargetListFilter value (=3) Changelog v1 .. v2: - adapt to new MMIO framework virt/kvm/arm/vgic/vgic-mmio-v2.c | 43 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 42 insertions(+), 1 deletion(-) diff --git a/virt/kvm/arm/vgic/vgic-mmio-v2.c b/virt/kvm/arm/vgic/vgic-mmio-v2.c index 888529e..8f8ea57 100644 --- a/virt/kvm/arm/vgic/vgic-mmio-v2.c +++ b/virt/kvm/arm/vgic/vgic-mmio-v2.c @@ -66,6 +66,47 @@ static void vgic_mmio_write_v2_misc(struct kvm_vcpu *vcpu, } } +static void vgic_mmio_write_sgir(struct kvm_vcpu *source_vcpu, + gpa_t addr, unsigned int len, + unsigned long val) +{ + int nr_vcpus = atomic_read(&source_vcpu->kvm->online_vcpus); + int intid = val & 0xf; + int targets = (val >> 16) & 0xff; + int mode = (val >> 24) & 0x03; + int c; + struct kvm_vcpu *vcpu; + + switch (mode) { + case 0x0: /* as specified by targets */ + break; + case 0x1: + targets = (1U << nr_vcpus) - 1; /* all, ... */ + targets &= ~(1U << source_vcpu->vcpu_id); /* but self */ + break; + case 0x2: /* this very vCPU only */ + targets = (1U << source_vcpu->vcpu_id); + break; + case 0x3: /* reserved */ + return; + } + + kvm_for_each_vcpu(c, vcpu, source_vcpu->kvm) { + struct vgic_irq *irq; + + if (!(targets & (1U << c))) + continue; + + irq = vgic_get_irq(source_vcpu->kvm, vcpu, intid); + + spin_lock(&irq->irq_lock); + irq->pending = true; + irq->source |= 1U << source_vcpu->vcpu_id; + + vgic_queue_irq_unlock(source_vcpu->kvm, irq); + } +} + static unsigned long vgic_mmio_read_target(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len) { @@ -131,7 +172,7 @@ static const struct vgic_register_region vgic_v2_dist_registers[] = { REGISTER_DESC_WITH_BITS_PER_IRQ(GIC_DIST_CONFIG, vgic_mmio_read_config, vgic_mmio_write_config, 2), REGISTER_DESC_WITH_LENGTH(GIC_DIST_SOFTINT, - vgic_mmio_read_raz, vgic_mmio_write_wi, 4), + vgic_mmio_read_raz, vgic_mmio_write_sgir, 4), REGISTER_DESC_WITH_LENGTH(GIC_DIST_SGI_PENDING_CLEAR, vgic_mmio_read_raz, vgic_mmio_write_wi, 16), REGISTER_DESC_WITH_LENGTH(GIC_DIST_SGI_PENDING_SET,