From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38413) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aOQVy-0002gG-9m for qemu-devel@nongnu.org; Wed, 27 Jan 2016 08:52:07 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aOQVv-00028X-PT for qemu-devel@nongnu.org; Wed, 27 Jan 2016 08:52:06 -0500 Received: from mail-wm0-x229.google.com ([2a00:1450:400c:c09::229]:33129) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aOQVv-00028F-IZ for qemu-devel@nongnu.org; Wed, 27 Jan 2016 08:52:03 -0500 Received: by mail-wm0-x229.google.com with SMTP id l66so3565358wml.0 for ; Wed, 27 Jan 2016 05:52:03 -0800 (PST) From: Eric Auger Date: Wed, 27 Jan 2016 13:51:49 +0000 Message-Id: <1453902715-25304-2-git-send-email-eric.auger@linaro.org> In-Reply-To: <1453902715-25304-1-git-send-email-eric.auger@linaro.org> References: <1453902715-25304-1-git-send-email-eric.auger@linaro.org> Subject: [Qemu-devel] [RFC 1/7] linux-headers: partial update for VFIO reserved IOVA registration List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: eric.auger@st.com, eric.auger@linaro.org, qemu-devel@nongnu.org, qemu-arm@nongnu.org, peter.maydell@linaro.org, alex.williamson@redhat.com, pranav.sawargaonkar@gmail.com, p.fedin@samsung.com, pbonzini@redhat.com, agraf@suse.de Cc: Bharat.Bhushan@freescale.com, suravee.suthikulpanit@amd.com, christoffer.dall@linaro.org This is a partial update aiming at enhancing the VFIO user API according to not yet upstreamed kernel developments available at: https://git.linaro.org/people/eric.auger/linux.git/shortlog/refs/heads/v4.5-rc1-pcie-passthrough-v1 See https://lkml.org/lkml/2016/1/26/371 for more details. Signed-off-by: Eric Auger --- linux-headers/linux/vfio.h | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/linux-headers/linux/vfio.h b/linux-headers/linux/vfio.h index aa276bc..ac6032e 100644 --- a/linux-headers/linux/vfio.h +++ b/linux-headers/linux/vfio.h @@ -8,8 +8,8 @@ * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ -#ifndef VFIO_H -#define VFIO_H +#ifndef _UAPIVFIO_H +#define _UAPIVFIO_H #include #include @@ -393,6 +393,7 @@ struct vfio_iommu_type1_info { __u32 argsz; __u32 flags; #define VFIO_IOMMU_INFO_PGSIZES (1 << 0) /* supported page sizes info */ +#define VFIO_IOMMU_INFO_REQUIRE_MSI_MAP (1 << 1)/* MSI must be mapped */ __u64 iova_pgsizes; /* Bitmap of supported page sizes */ }; @@ -403,12 +404,20 @@ struct vfio_iommu_type1_info { * * Map process virtual addresses to IO virtual addresses using the * provided struct vfio_dma_map. Caller sets argsz. READ &/ WRITE required. + * + * In case MSI_RESERVED_IOVA is set, the API only aims at registering an IOVA + * region which will be used on some platforms to map the host MSI frame. + * in that specific case, vaddr is ignored. The requirement for provisioning + * such IOVA range can be checked by calling VFIO_IOMMU_GET_INFO with the + * VFIO_IOMMU_INFO_REQUIRE_MSI_MAP attribute. */ struct vfio_iommu_type1_dma_map { __u32 argsz; __u32 flags; #define VFIO_DMA_MAP_FLAG_READ (1 << 0) /* readable from device */ #define VFIO_DMA_MAP_FLAG_WRITE (1 << 1) /* writable from device */ +/* reserved iova for MSI vectors*/ +#define VFIO_DMA_MAP_FLAG_MSI_RESERVED_IOVA (1 << 2) __u64 vaddr; /* Process virtual address */ __u64 iova; /* IO virtual address */ __u64 size; /* Size of mapping (bytes) */ @@ -591,4 +600,4 @@ struct vfio_iommu_spapr_tce_remove { /* ***************************************************************** */ -#endif /* VFIO_H */ +#endif /* _UAPIVFIO_H */ -- 1.9.1