[Qemu-devel] [Bug 1333688] Re: vhost-user: VHOST_USER_SET_MEM_TABLE doesn't contain all regions

[Damjan Marion]

Problem fixed in qemu commit 3fd74b84.

** Changed in: qemu
       Status: New => Fix Committed

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https://bugs.launchpad.net/bugs/1333688

Title:
  vhost-user: VHOST_USER_SET_MEM_TABLE doesn't contain all regions

Status in QEMU:
  Fix Committed

Bug description:

  vhost-user implementation doesn't provide information about all memory 
regions, 
  and in some cases client is not able to map buffer memory as he is missing 
  memory region information for specific address.

  Same thing is implemented properly for vhost-net. Below gdb outputs are 
  showing memory regions information provided to the vhost-net and vhost-user.


  ==== memory regions information provided to vhost-net  ====

  (gdb) p/x hdev->mem->regions[0]
  $21 = {
    guest_phys_addr = 0x100000000,
    memory_size = 0xc0000000,
    userspace_addr = 0x2aab6ac00000,
    flags_padding = 0x0
  }
  (gdb) p/x hdev->mem->regions[1]
  $22 = {
    guest_phys_addr = 0xfffc0000,
    memory_size = 0x40000,
    userspace_addr = 0x7ffff4a00000,
    flags_padding = 0x0
  }
  (gdb) p/x hdev->mem->regions[2]
  $23 = {
    guest_phys_addr = 0x0,
    memory_size = 0xa0000,
    userspace_addr = 0x2aaaaac00000,
    flags_padding = 0x0
  }
  (gdb) p/x hdev->mem->regions[3]
  $24 = {
    guest_phys_addr = 0xc0000,
    memory_size = 0xbff40000,
    userspace_addr = 0x2aaaaacc0000,
    flags_padding = 0x0
  }
  (gdb)

  
  ==== memory regions information provided to vhost-user  ====

  (gdb) p/x msg.memory.nregions
  $28 = 0x1
  (gdb) p/x msg.memory.regions[0]
  $29 = {
    guest_phys_addr = 0x0,
    memory_size = 0x180000000,
    userspace_addr = 0x2aaaaac00000
  }
  (gdb)

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