[Qemu-devel] [PATCH 0/6] AHCI Device Fixes

[John Snow]

Based off of feedback from the RFC of the same name,
this series batches together a group of fixes that
improve the AHCI device to fix a number of bugs.

A number of fixes included in the RFC that provide more
radical changes are omitted for now in favor of a smaller,
more easily reviewable set for QEMU 2.2.

In summary:

Patch #1 and #6 correct the format of FIS packet responses
that are available to the guest operating system upon interrupt.

Patch #2 corrects an oversight where we do not inform the
guest how many bytes we've transferred. This is relied upon
for non-NCQ modes and in some early bootup and shutdown code.

Patch #5 corrects cases with malformed scatter-gather lists that
may cause leaks, or cause QEMU to hang in an allocation loop.

Patch #4 attempts to continue minimizing the divergence of the
multiple pathways through the AHCI device by re-using existing
callbacks.

Taken together, these patches should allow non-ncq operation
for Windows hosts, as well as enable hibernation for Windows 7.

Hibernation for Windows 8 and AHCI remains non-functional.

John Snow (6):
  ahci: Correct PIO/D2H FIS responses
  ahci: Update byte count after DMA completion
  ide: repair PIO transfers for cases where nsector > 1
  ahci: unify sglist preparation
  ide: Correct handling of malformed/short PRDTs
  ahci: Fix SDB FIS Construction

 dma-helpers.c     |   3 ++
 hw/ide/ahci.c     | 113 ++++++++++++++++++++++++++++++++----------------------
 hw/ide/ahci.h     |   8 ++++
 hw/ide/core.c     |  17 ++++++--
 hw/ide/internal.h |   2 +
 hw/ide/pci.c      |   5 ++-
 6 files changed, 97 insertions(+), 51 deletions(-)

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1.9.3