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22f3787e9d
Setup a dax device. Use the shm capability to find the cache entry and map it. The DAX window is accessed by the fs/dax.c infrastructure and must have struct pages (at least on x86). Use devm_memremap_pages() to map the DAX window PCI BAR and allocate struct page. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com> Signed-off-by: Liu Bo <bo.liu@linux.alibaba.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
22 lines
588 B
C
22 lines
588 B
C
/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
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#ifndef _UAPI_LINUX_VIRTIO_FS_H
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#define _UAPI_LINUX_VIRTIO_FS_H
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#include <linux/types.h>
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#include <linux/virtio_ids.h>
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#include <linux/virtio_config.h>
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#include <linux/virtio_types.h>
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struct virtio_fs_config {
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/* Filesystem name (UTF-8, not NUL-terminated, padded with NULs) */
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__u8 tag[36];
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/* Number of request queues */
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__le32 num_request_queues;
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} __attribute__((packed));
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/* For the id field in virtio_pci_shm_cap */
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#define VIRTIO_FS_SHMCAP_ID_CACHE 0
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#endif /* _UAPI_LINUX_VIRTIO_FS_H */
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