gwj / at91sam9263 · Commits

  • Fix gdbserver number of registers (Tristan Gingold) ...
    5a377912 
    git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6280 c046a42c-6fe2-441c-8c8c-71466251a162
    blueswir1 authored
     
    Browse Code »
  • RTL8139: Latch C+ mode state instead of inferring it from C+ Command register (Avi Kivity) ...
    2c3891ab 
    It was observed that Windows 2003 x64 hangs when shutting down if an
RTL8139 NIC and a USB device tablet are both present.  What seems to be
happening is:

- the guest shuts down the transmitter and receiver
- time passes
- the guest requests a tally counter dump

As it happens, the tally counter command register overlaps the transmit
status register in C mode.  Qemu determines whether the chip is in C or C+
mode by looking at the C+ transmit enable bit; as this is now unset, the
dump tally counter command is interpreted as a C mode transmit command.  The
guest doesn't think so, however, and continues to poll for completion of the
tally counter dump command.  This never occurs, so the guest hangs.

Fix by redefining C+ mode as "a write to the C+ command register has occurred
since the last reset".  The data sheet is silent on the matter.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6279 c046a42c-6fe2-441c-8c8c-71466251a162
    aliguori authored
     
    Browse Code »
  • Fix race in POSIX AIO emulation (Jan Kiszka) ...
    f094a782 
    When we cancel an AIO request that is already being processed by
aio_thread, qemu_paio_cancel should return QEMU_PAIO_NOTCANCELED as long
as aio_thread isn't done with this request. But as the latter currently
updates aiocb->ret after every block of the request, we may report
QEMU_PAIO_ALLDONE too early.

Futhermore, in case some zero-length request should have been queued,
aiocb->ret is never set to != -EINPROGRESS and callers like
raw_aio_cancel could get stuck in an endless loop.

Fix those issues by updating aiocb->ret _after_ the request has been
fully processed. This also simplifies the locking.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6278 c046a42c-6fe2-441c-8c8c-71466251a162
    aliguori authored
     
    Browse Code »