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[80.11.198.90]) by smtp.gmail.com with ESMTPSA id t9sm6345866wjf.33.2016.01.27.05.51.59 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 27 Jan 2016 05:52:01 -0800 (PST) From: Eric Auger 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 Date: Wed, 27 Jan 2016 13:51:49 +0000 Message-Id: <1453902715-25304-2-git-send-email-eric.auger@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1453902715-25304-1-git-send-email-eric.auger@linaro.org> References: <1453902715-25304-1-git-send-email-eric.auger@linaro.org> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2a00:1450:400c:c09::229 Cc: Bharat.Bhushan@freescale.com, suravee.suthikulpanit@amd.com, christoffer.dall@linaro.org Subject: [Qemu-devel] [RFC 1/7] linux-headers: partial update for VFIO reserved IOVA registration X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.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(-) -- 1.9.1 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 */