11  * the COPYING file in the top-level directory.
13  * Based on qemu-kvm device-assignment:
14  *  Adapted for KVM by Qumranet.
19  *  Copyright (C) 2008, IBM, Muli Ben-Yehuda (muli@il.ibm.com)
22 #include "qemu/osdep.h"
25 #include "system/kvm.h"
26 #include "hw/vfio/vfio-device.h"
29 #include "vfio-helpers.h"
33     vbmap->pages = REAL_HOST_PAGE_ALIGN(size) / qemu_real_host_page_size();  in vfio_bitmap_alloc()
34     vbmap->size = ROUND_UP(vbmap->pages, sizeof(__u64) * BITS_PER_BYTE) /  in vfio_bitmap_alloc()
36     vbmap->bitmap = g_try_malloc0(vbmap->size);  in vfio_bitmap_alloc()
37     if (!vbmap->bitmap) {  in vfio_bitmap_alloc()
38         return -ENOMEM;  in vfio_bitmap_alloc()
49     for (hdr = ptr + cap_offset; hdr != ptr; hdr = ptr + hdr->next) {  in vfio_get_cap()
50         if (hdr->id == id) {  in vfio_get_cap()
61     if (!(info->flags & VFIO_REGION_INFO_FLAG_CAPS)) {  in vfio_get_region_info_cap()
65     return vfio_get_cap((void *)info, info->cap_offset, id);  in vfio_get_region_info_cap()
71     if (!(info->flags & VFIO_DEVICE_FLAGS_CAPS)) {  in vfio_get_device_info_cap()
75     return vfio_get_cap((void *)info, info->cap_offset, id);  in vfio_get_device_info_cap()
81     if (!(info->flags & VFIO_IOMMU_INFO_CAPS)) {  in vfio_get_iommu_type1_info_cap()
85     return vfio_get_cap((void *)info, info->cap_offset, id);  in vfio_get_iommu_type1_info_cap()
103         *avail = cap->avail;  in vfio_get_info_dma_avail()
111  * We have a single VFIO pseudo device per KVM VM.  Once created it lives
113  * reference to it and the device's reference to kvm.  Therefore once
114  * initialized, this file descriptor is only released on QEMU exit and
115  * we'll re-use it should another vfio device be attached before then.
117 int vfio_kvm_device_fd = -1;
124     if (vfio_kvm_device_fd != -1) {  in vfio_kvm_device_close()
126         vfio_kvm_device_fd = -1;  in vfio_kvm_device_close()
150             error_setg_errno(errp, errno, "Failed to create KVM VFIO device");  in vfio_kvm_device_add_fd()
151             return -errno;  in vfio_kvm_device_add_fd()
158         error_setg_errno(errp, errno, "Failed to add fd %d to KVM VFIO device",  in vfio_kvm_device_add_fd()
160         return -errno;  in vfio_kvm_device_add_fd()
176         error_setg(errp, "KVM VFIO device isn't created yet");  in vfio_kvm_device_del_fd()
177         return -EINVAL;  in vfio_kvm_device_del_fd()
182                          "Failed to remove fd %d from KVM VFIO device", fd);  in vfio_kvm_device_del_fd()
183         return -errno;  in vfio_kvm_device_del_fd()
197     info->argsz = argsz;  in vfio_get_device_info()
204     if (info->argsz > argsz) {  in vfio_get_device_info()
205         argsz = info->argsz;  in vfio_get_device_info()