From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752568AbcBKOhx (ORCPT ); Thu, 11 Feb 2016 09:37:53 -0500 Received: from mail-wm0-f48.google.com ([74.125.82.48]:36007 "EHLO mail-wm0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752413AbcBKOfi (ORCPT ); Thu, 11 Feb 2016 09:35:38 -0500 From: Eric Auger To: eric.auger@st.com, eric.auger@linaro.org, alex.williamson@redhat.com, will.deacon@arm.com, joro@8bytes.org, tglx@linutronix.de, jason@lakedaemon.net, marc.zyngier@arm.com, christoffer.dall@linaro.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Cc: suravee.suthikulpanit@amd.com, patches@linaro.org, linux-kernel@vger.kernel.org, Manish.Jaggi@caviumnetworks.com, Bharat.Bhushan@freescale.com, pranav.sawargaonkar@gmail.com, p.fedin@samsung.com, iommu@lists.linux-foundation.org, sherry.hurwitz@amd.com, brijesh.singh@amd.com, leo.duran@amd.com, Thomas.Lendacky@amd.com Subject: [RFC v2 11/15] msi: Add a new MSI_FLAG_IRQ_REMAPPING flag Date: Thu, 11 Feb 2016 14:34:18 +0000 Message-Id: <1455201262-5259-12-git-send-email-eric.auger@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1455201262-5259-1-git-send-email-eric.auger@linaro.org> References: <1455201262-5259-1-git-send-email-eric.auger@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Let's introduce a new msi_domain_info flag value, MSI_FLAG_IRQ_REMAPPING meant to tell the domain supports IRQ REMAPPING, also known as Interrupt Translation Service. On Intel HW this capability is abstracted on IOMMU side while on ARM it is abstracted on MSI controller side. GICv3 ITS HW is the first HW advertising that feature. Signed-off-by: Eric Auger --- drivers/irqchip/irq-gic-v3-its.c | 1 + include/linux/msi.h | 2 ++ 2 files changed, 3 insertions(+) diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 3447549..a5e0d8b 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -1544,6 +1544,7 @@ static int its_probe(struct device_node *node, struct irq_domain *parent) inner_domain->parent = parent; inner_domain->bus_token = DOMAIN_BUS_NEXUS; info->ops = &its_msi_domain_ops; + info->flags |= MSI_FLAG_IRQ_REMAPPING; info->data = its; inner_domain->host_data = info; } diff --git a/include/linux/msi.h b/include/linux/msi.h index a2a0068..03eda72 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -261,6 +261,8 @@ enum { MSI_FLAG_MULTI_PCI_MSI = (1 << 3), /* Support PCI MSIX interrupts */ MSI_FLAG_PCI_MSIX = (1 << 4), + /* Support MSI IRQ remapping service */ + MSI_FLAG_IRQ_REMAPPING = (1 << 5), }; int msi_domain_set_affinity(struct irq_data *data, const struct cpumask *mask, -- 1.9.1