[PATCH 0/8] Add XHCI TR NOOP support, plus PCI, MSIX changes

[Nicholas Piggin]

Hi,

This series adds XHCI "TR NOOP" support, but adding qtests ran into
issues with PCI and MSIX, and fixing those irritated what looks like
a bug in the e1000e/igb tests.

Firstly, the XHCI NEC PCI host has a shared BAR for device registers
and MSIX space, which is not handled by qtest/pci. Keeping track of BAR
mappings in qtest and allowing MSIX to use an existing mapping seems to
work.

For the XHCI qtest, I added a MSIX check to ensure interrupts are working
correctly, similarly to e1000e it polls the PBA bit with the interrupt
masked. Doing this never actually clears the pending msix irq, because
that is not implemented in the hw/pci code. So a test that waits for an
interrupt to be triggered multiple times will fail.

Adding the PBA write operations to clear/trigger pending interrupts
breaks e1000e/igb tests that wait for multiple triggers, because they
are actually buggy and only triggering the irq once, but the missing
MSIX write support was saving them because it made it look like the
irq had triggered.

My XHCI qtest caught that issue because it has some code which
asserts that the interrupt is *not* pending.

Since RFC I fixed up some checkpatch issues as Fabiano pointed out,
and also dug into the e1000e/igb test failure a bit more and hopefully
fixed it properly. 

Thanks,
Nick

Nicholas Piggin (8):
  qtest/pci: Enforce balanced iomap/unmap
  qtest/libqos/pci: Fix qpci_msix_enable sharing bar0
  pci/msix: Implement PBA writes
  tests/qtest/e1000e|igb: Fix e1000e and igb tests to re-trigger
    interrupts
  hw/usb/xhci: Move HCD constants to a header and add register constants
  qtest/xhci: Add controller and device setup and ring tests
  hw/usb/xhci: Support TR NOOP commands
  qtest/xhci: add a test for TR NOOP commands

 hw/usb/hcd-xhci.h               | 197 ++++++++++++
 tests/qtest/libqos/ahci.h       |   1 +
 tests/qtest/libqos/pci.h        |   4 +
 tests/qtest/libqos/virtio-pci.h |   1 +
 hw/pci/msix.c                   |  16 +
 hw/usb/hcd-xhci.c               | 318 ++++++-------------
 tests/qtest/ahci-test.c         |   2 +
 tests/qtest/e1000e-test.c       |   8 +-
 tests/qtest/igb-test.c          |   8 +-
 tests/qtest/libqos/ahci.c       |   6 +
 tests/qtest/libqos/e1000e.c     |   2 +-
 tests/qtest/libqos/pci.c        |  92 +++++-
 tests/qtest/libqos/virtio-pci.c |   6 +-
 tests/qtest/usb-hcd-xhci-test.c | 535 +++++++++++++++++++++++++++++++-
 14 files changed, 943 insertions(+), 253 deletions(-)

-- 
2.45.2