Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933221AbcDSRQU (ORCPT ); Tue, 19 Apr 2016 13:16:20 -0400 Received: from mail-wm0-f54.google.com ([74.125.82.54]:36308 "EHLO mail-wm0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932525AbcDSRNU (ORCPT ); Tue, 19 Apr 2016 13:13:20 -0400 From: Eric Auger To: eric.auger@st.com, eric.auger@linaro.org, robin.murphy@arm.com, 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 Cc: patches@linaro.org, linux-kernel@vger.kernel.org, Bharat.Bhushan@freescale.com, pranav.sawargaonkar@gmail.com, p.fedin@samsung.com, iommu@lists.linux-foundation.org, Jean-Philippe.Brucker@arm.com, julien.grall@arm.com Subject: [PATCH v7 1/8] genirq/msi: Add a new MSI_FLAG_IRQ_REMAPPING flag Date: Tue, 19 Apr 2016 17:13:03 +0000 Message-Id: <1461085990-2547-2-git-send-email-eric.auger@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1461085990-2547-1-git-send-email-eric.auger@linaro.org> References: <1461085990-2547-1-git-send-email-eric.auger@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 999 Lines: 32 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 IRQ remapping capability is abstracted on IOMMU side while on ARM it is abstracted on MSI controller side. This flag will be used to know whether the MSI passthrough is safe. Signed-off-by: Eric Auger --- v4 -> v5: - seperate flag introduction from first user addition (ITS) --- include/linux/msi.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/linux/msi.h b/include/linux/msi.h index 8b425c6..08441b1 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -270,6 +270,8 @@ 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