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File _service:tar_scm:linux-headers-update-against-5.10-and-manual-clear-v.patch of Package qemu
From 2ccd1ec0d18070727ad9b9647da6b6937f16de2a Mon Sep 17 00:00:00 2001 From: Zenghui Yu <yuzenghui@huawei.com> Date: Sat, 8 May 2021 17:31:03 +0800 Subject: [PATCH] linux-headers: update against 5.10 and manual clear vfio dirty log series The new capability VFIO_DIRTY_LOG_MANUAL_CLEAR and the new ioctl VFIO_IOMMU_DIRTY_PAGES_FLAG_GET_BITMAP_NOCLEAR and VFIO_IOMMU_DIRTY_PAGES_FLAG_CLEAR_BITMAP have been introduced in the kernel, update the header to add them. Signed-off-by: Zenghui Yu <yuzenghui@huawei.com> Signed-off-by: Kunkun Jiang <jiangkunkun@huawei.com> --- linux-headers/linux/vfio.h | 36 +++++++++++++++++++++++++++++++++++- 1 file changed, 35 insertions(+), 1 deletion(-) diff --git a/linux-headers/linux/vfio.h b/linux-headers/linux/vfio.h index 8e175ece31..956154e509 100644 --- a/linux-headers/linux/vfio.h +++ b/linux-headers/linux/vfio.h @@ -56,6 +56,16 @@ */ #define VFIO_UPDATE_VADDR 10 +/* + * The vfio_iommu driver may support user clears dirty log manually, which means + * dirty log can be requested to not cleared automatically after dirty log is + * copied to userspace, it's user's duty to clear dirty log. + * + * Note: please refer to VFIO_IOMMU_DIRTY_PAGES_FLAG_GET_BITMAP_NOCLEAR and + * VFIO_IOMMU_DIRTY_PAGES_FLAG_CLEAR_BITMAP. + */ +#define VFIO_DIRTY_LOG_MANUAL_CLEAR 11 + /* * The IOCTL interface is designed for extensibility by embedding the * structure length (argsz) and flags into structures passed between @@ -1651,8 +1661,30 @@ struct vfio_iommu_type1_dma_unmap { * actual bitmap. If dirty pages logging is not enabled, an error will be * returned. * - * Only one of the flags _START, _STOP and _GET may be specified at a time. + * The VFIO_IOMMU_DIRTY_PAGES_FLAG_GET_BITMAP_NOCLEAR flag is almost same as + * VFIO_IOMMU_DIRTY_PAGES_FLAG_GET_BITMAP, except that it requires underlying + * dirty bitmap is not cleared automatically. The user can clear it manually by + * calling the IOCTL with VFIO_IOMMU_DIRTY_PAGES_FLAG_CLEAR_BITMAP flag set. * + * Calling the IOCTL with VFIO_IOMMU_DIRTY_PAGES_FLAG_CLEAR_BITMAP flag set, + * instructs the IOMMU driver to clear the dirty status of pages in a bitmap + * for IOMMU container for a given IOVA range. The user must specify the IOVA + * range, the bitmap and the pgsize through the structure + * vfio_iommu_type1_dirty_bitmap_get in the data[] portion. This interface + * supports clearing a bitmap of the smallest supported pgsize only and can be + * modified in future to clear a bitmap of any specified supported pgsize. The + * user must provide a memory area for the bitmap memory and specify its size + * in bitmap.size. One bit is used to represent one page consecutively starting + * from iova offset. The user should provide page size in bitmap.pgsize field. + * A bit set in the bitmap indicates that the page at that offset from iova is + * cleared the dirty status, and dirty tracking is re-enabled for that page. The + * caller must set argsz to a value including the size of structure + * vfio_iommu_dirty_bitmap_get, but excluing the size of the actual bitmap. If + * dirty pages logging is not enabled, an error will be returned. Note: user + * should clear dirty log before handle corresponding dirty pages. + * + * Only one of the flags _START, _STOP, _GET, _GET_NOCLEAR_, and _CLEAR may be + * specified at a time. */ struct vfio_iommu_type1_dirty_bitmap { __u32 argsz; @@ -1660,6 +1692,8 @@ struct vfio_iommu_type1_dirty_bitmap { #define VFIO_IOMMU_DIRTY_PAGES_FLAG_START (1 << 0) #define VFIO_IOMMU_DIRTY_PAGES_FLAG_STOP (1 << 1) #define VFIO_IOMMU_DIRTY_PAGES_FLAG_GET_BITMAP (1 << 2) +#define VFIO_IOMMU_DIRTY_PAGES_FLAG_GET_BITMAP_NOCLEAR (1 << 3) +#define VFIO_IOMMU_DIRTY_PAGES_FLAG_CLEAR_BITMAP (1 << 4) __u8 data[]; }; -- 2.27.0
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