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Tue, 23 Feb 2021 16:07:29 -0500 X-MC-Unique: TVbmlccvOb6B0ll0BxUn1w-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 4886B803F59; Tue, 23 Feb 2021 21:07:26 +0000 (UTC) Received: from laptop.redhat.com (ovpn-114-34.ams2.redhat.com [10.36.114.34]) by smtp.corp.redhat.com (Postfix) with ESMTP id E0FCF5D9D0; Tue, 23 Feb 2021 21:07:16 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, will@kernel.org, maz@kernel.org, robin.murphy@arm.com, joro@8bytes.org, alex.williamson@redhat.com, tn@semihalf.com, zhukeqian1@huawei.com Subject: [PATCH v12 07/13] vfio: Use capability chains to handle device specific irq Date: Tue, 23 Feb 2021 22:06:19 +0100 Message-Id: <20210223210625.604517-8-eric.auger@redhat.com> In-Reply-To: <20210223210625.604517-1-eric.auger@redhat.com> References: <20210223210625.604517-1-eric.auger@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Cc: jean-philippe@linaro.org, wangxingang5@huawei.com, lushenming@huawei.com, jiangkunkun@huawei.com, vivek.gautam@arm.com, vsethi@nvidia.com, zhangfei.gao@linaro.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" From: Tina Zhang Caps the number of irqs with fixed indexes and uses capability chains to chain device specific irqs. Signed-off-by: Tina Zhang Signed-off-by: Eric Auger [Eric: Put cap_offset at the end of the vfio_irq_info struct, remove GFX IRQ at the moment and remove any reference to this latter in the commit message] --- --- include/uapi/linux/vfio.h | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index bc46e5d6daa4..3688215843fe 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -702,11 +702,27 @@ struct vfio_irq_info { #define VFIO_IRQ_INFO_MASKABLE (1 << 1) #define VFIO_IRQ_INFO_AUTOMASKED (1 << 2) #define VFIO_IRQ_INFO_NORESIZE (1 << 3) +#define VFIO_IRQ_INFO_FLAG_CAPS (1 << 4) /* Info supports caps */ __u32 index; /* IRQ index */ __u32 count; /* Number of IRQs within this index */ + __u32 cap_offset; /* Offset within info struct of first cap */ }; #define VFIO_DEVICE_GET_IRQ_INFO _IO(VFIO_TYPE, VFIO_BASE + 9) +/* + * The irq type capability allows IRQs unique to a specific device or + * class of devices to be exposed. + * + * The structures below define version 1 of this capability. + */ +#define VFIO_IRQ_INFO_CAP_TYPE 3 + +struct vfio_irq_info_cap_type { + struct vfio_info_cap_header header; + __u32 type; /* global per bus driver */ + __u32 subtype; /* type specific */ +}; + /** * VFIO_DEVICE_SET_IRQS - _IOW(VFIO_TYPE, VFIO_BASE + 10, struct vfio_irq_set) * @@ -808,7 +824,8 @@ enum { VFIO_PCI_MSIX_IRQ_INDEX, VFIO_PCI_ERR_IRQ_INDEX, VFIO_PCI_REQ_IRQ_INDEX, - VFIO_PCI_NUM_IRQS + VFIO_PCI_NUM_IRQS = 5 /* Fixed user ABI, IRQ indexes >=5 use */ + /* device specific cap to define content */ }; /* -- 2.26.2 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu