Skip to content

Q
qemu

openeuler / qemu

通知 10
Star 0
Fork 0
Q
qemu

体验新版 GitCode，发现更多精彩内容 >>

切换分支/标签
  1. 04 7月, 2016 1 次提交
  3. 27 6月, 2016 1 次提交
  5. 16 2月, 2016 1 次提交
    • G
      virtio-net: use the backend cross-endian capabilities · 1bfa316c
      由 Greg Kurz 提交于 
      When running a fully emulated device in cross-endian conditions, including
a virtio 1.0 device offered to a big endian guest, we need to fix the vnet
headers. This is currently handled by the virtio_net_hdr_swap() function
in the core virtio-net code but it should actually be handled by the net
backend.

With this patch, virtio-net now tries to configure the backend to do the
endian fixing when the device starts (i.e. drivers sets the CONFIG_OK bit).
If the backend cannot support the requested endiannes, we have to fallback
onto virtio_net_hdr_swap(): this is recorded in the needs_vnet_hdr_swap flag,
to be used in the TX and RX paths.

Note that we reset the backend to the default behaviour (guest native
endianness) when the device stops (i.e. device status had CONFIG_OK bit and
driver unsets it). This is needed, with the linux tap backend at least,
otherwise the guest may lose network connectivity if rebooted into a
different endianness.

The current vhost-net code also tries to configure net backends. This will
be no more needed and will be reverted in a subsequent patch.
Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: NLaurent Vivier <lvivier@redhat.com>
Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: NLaurent Vivier <lvivier@redhat.com>
      1bfa316c
  7. 07 2月, 2016 1 次提交
    • P
      virtio: move allocation to virtqueue_pop/vring_pop · 51b19ebe
      由 Paolo Bonzini 提交于 
      The return code of virtqueue_pop/vring_pop is unused except to check for
errors or 0.  We can thus easily move allocation inside the functions
and just return a pointer to the VirtQueueElement.

The advantage is that we will be able to allocate only the space that
is needed for the actual size of the s/g list instead of the full
VIRTQUEUE_MAX_SIZE items.  Currently VirtQueueElement takes about 48K
of memory, and this kind of allocation puts a lot of stress on malloc.
By cutting the size by two or three orders of magnitude, malloc can
use much more efficient algorithms.

The patch is pretty large, but changes to each device are testable
more or less independently.  Splitting it would mostly add churn.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: NCornelia Huck <cornelia.huck@de.ibm.com>
      51b19ebe
  9. 29 1月, 2016 1 次提交
  11. 01 10月, 2015 1 次提交
  13. 24 9月, 2015 2 次提交
  15. 10 9月, 2015 1 次提交
  17. 13 8月, 2015 1 次提交
  19. 27 7月, 2015 2 次提交
  21. 20 7月, 2015 3 次提交
  23. 13 7月, 2015 1 次提交
  25. 19 6月, 2015 1 次提交
  27. 11 6月, 2015 4 次提交
  29. 04 6月, 2015 1 次提交
  31. 01 6月, 2015 1 次提交
  33. 31 5月, 2015 2 次提交
  35. 11 5月, 2015 1 次提交
  37. 30 4月, 2015 1 次提交
  39. 28 4月, 2015 2 次提交
  41. 25 3月, 2015 1 次提交
  43. 10 3月, 2015 1 次提交
    • R
      fix GCC 5.0.0 logical-not-parentheses warnings · 8c1ac475
      由 Radim Krčmář 提交于 
      man gcc:
  Warn about logical not used on the left hand side operand of a
  comparison.  This option does not warn if the RHS operand is of a
  boolean type.

By preferring bool over int where sensible, but without modifying any
depending code, make GCC happy in cases like this,
  qemu-img.c: In function ‘compare_sectors’:
  qemu-img.c:992:39: error: logical not is only applied to the left hand
  side of comparison [-Werror=logical-not-parentheses]
           if (!!memcmp(buf1, buf2, 512) != res) {

hw/ide/core.c:1836 doesn't throw an error,
  assert(!!s->error == !!(s->status & ERR_STAT));
even thought the second operand is int (and first hunk of this patch has
a very similar case), maybe GCC developers still have a little faith in
C programmers.
Signed-off-by: NRadim Krčmář <rkrcmar@redhat.com>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>
      8c1ac475
  45. 26 2月, 2015 2 次提交
  47. 12 1月, 2015 1 次提交
    • P
      net: remove all cleanup methods from NIC NetClientInfos · 57407ea4
      由 Paolo Bonzini 提交于 
      All NICs have a cleanup function that, in most cases, zeroes the pointer
to the NICState.  In some cases, it frees data belonging to the NIC.

However, this function is never called except when exiting from QEMU.
It is not necessary to NULL pointers and free data here; the right place
to do that would be in the device's unrealize function, after calling
qemu_del_nic.  Zeroing the NIC multiple times is also wrong for multiqueue
devices.

This cleanup function gets in the way of making the NetClientStates for
the NIC hold an object_ref reference to the object, so get rid of it.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
      57407ea4
  49. 28 11月, 2014 1 次提交
  51. 15 10月, 2014 2 次提交
  53. 19 9月, 2014 1 次提交
  55. 05 9月, 2014 2 次提交