On Wed, Oct 01, 2014 at 06:55:45PM -0400, John Snow wrote:
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(-)
Dropped the broken assert that Paolo spotted.
Thanks, applied to my block tree:
https://github.com/stefanha/qemu/commits/block
Stefan