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  1. 28 2月, 2016 1 次提交
    • G
      xics: report errors with the QEMU Error API · a005b3ef
      由 Greg Kurz 提交于 
      Using the return value to report errors is error prone:
- xics_alloc() returns -1 on error but spapr_vio_busdev_realize() errors
  on 0
- xics_alloc_block() returns the unclear value of ics->offset - 1 on error
  but both rtas_ibm_change_msi() and spapr_phb_realize() error on 0

This patch adds an errp argument to xics_alloc() and xics_alloc_block() to
report errors. The return value of these functions is a valid IRQ number
if errp is NULL. It is undefined otherwise.

The corresponding error traces get promotted to error messages. Note that
the "can't allocate IRQ" error message in spapr_vio_busdev_realize() also
moves to xics_alloc(). Similar error message consolidation isn't really
applicable to xics_alloc_block() because callers have extra context (device
config address, MSI or MSIX).

This fixes the issues mentioned above.

Based on previous work from Brian W. Hart.
Signed-off-by: NGreg Kurz <gkurz@linux.vnet.ibm.com>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
      a005b3ef
  3. 25 2月, 2016 1 次提交
  5. 09 2月, 2016 1 次提交
    • P
      hw: Add support for LSI SAS1068 (mptsas) device · e351b826
      由 Paolo Bonzini 提交于 
      This adds the SAS1068 device, a SAS disk controller used in VMware that
is oldish but widely supported and has decent performance.  Unlike
megasas, it presents itself as a SAS controller and not as a RAID
controller.  The device corresponds to the mptsas kernel driver in
Linux.

A few small things in the device setup are based on Don Slutz's old
patch, but the device emulation was written from scratch based on Don's
SeaBIOS patch and on the FreeBSD and Linux drivers.  It is 2400 lines
shorter than Don's patch (and roughly the same size as MegaSAS---also
because it doesn't support the similar SPI controller), implements SCSI
task management functions (with asynchronous cancellation), supports
big-endian hosts, has complete support for migration and follows the
QEMU coding standards much more closely.

To write the driver, I first split Don's patch in two parts, with
the configuration bits in one file and the rest in a separate file.
I first left mptconfig.c in place and rewrote the rest, then deleted
mptconfig.c as well.  The configuration pages are still based mostly on
VirtualBox's, though not exactly the same.  However, the implementation
is completely different.  The contents of the pages themselves should
not be copyrightable.
Signed-off-by: NDon Slutz <Don@CloudSwitch.com>
Message-Id: <1347382813-5662-1-git-send-email-Don@CloudSwitch.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
      e351b826
  7. 20 1月, 2016 1 次提交
    • A
      vfio/pci: Lazy PBA emulation · 95239e16
      由 Alex Williamson 提交于 
      The PCI spec recommends devices use additional alignment for MSI-X
data structures to allow software to map them to separate processor
pages.  One advantage of doing this is that we can emulate those data
structures without a significant performance impact to the operation
of the device.  Some devices fail to implement that suggestion and
assigned device performance suffers.

One such case of this is a Mellanox MT27500 series, ConnectX-3 VF,
where the MSI-X vector table and PBA are aligned on separate 4K
pages.  If PBA emulation is enabled, performance suffers.  It's not
clear how much value we get from PBA emulation, but the solution here
is to only lazily enable the emulated PBA when a masked MSI-X vector
fires.  We then attempt to more aggresively disable the PBA memory
region any time a vector is unmasked.  The expectation is then that
a typical VM will run entirely with PBA emulation disabled, and only
when used is that emulation re-enabled.
Reported-by: NShyam Kaushik <shyam.kaushik@gmail.com>
Tested-by: NShyam Kaushik <shyam.kaushik@gmail.com>
Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>
      95239e16
  9. 07 1月, 2016 2 次提交
  11. 18 12月, 2015 8 次提交
    • D
      io: add QIOChannelCommand class · 195e14d0
      由 Daniel P. Berrange 提交于 
      Add a QIOChannel subclass that is capable of performing I/O
to/from a separate process, via a pair of pipes. The command
can be used for unidirectional or bi-directional I/O.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
      195e14d0
    • D
      io: add QIOChannelWebsock class · 2d1d0e70
      由 Daniel P. Berrange 提交于 
      Add a QIOChannel subclass that can run the websocket protocol over
the top of another QIOChannel instance. This initial implementation
is only capable of acting as a websockets server. There is no support
for acting as a websockets client yet.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
      2d1d0e70
    • D
      io: add QIOChannelTLS class · ed8ee42c
      由 Daniel P. Berrange 提交于 
      Add a QIOChannel subclass that can run the TLS protocol over
the top of another QIOChannel instance. The object provides a
simplified API to perform the handshake when starting the TLS
session. The layering of TLS over the underlying channel does
not have to be setup immediately. It is possible to take an
existing QIOChannel that has done some handshake and then swap
in the QIOChannelTLS layer. This allows for use with protocols
which start TLS right away, and those which start plain text
and then negotiate TLS.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
      ed8ee42c
    • D
      io: add QIOChannelFile class · d6e48869
      由 Daniel P. Berrange 提交于 
      Add a QIOChannel subclass that is capable of operating on things
that are files, such as plain files, pipes, character/block
devices, but notably not sockets.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
      d6e48869
    • D
      io: add QIOChannelSocket class · 559607ea
      由 Daniel P. Berrange 提交于 
      Implement a QIOChannel subclass that supports sockets I/O.
The implementation is able to manage a single socket file
descriptor, whether a TCP/UNIX listener, TCP/UNIX connection,
or a UDP datagram. It provides APIs which can listen and
connect either asynchronously or synchronously. Since there
is no asynchronous DNS lookup API available, it uses the
QIOTask helper for spawning a background thread to ensure
non-blocking operation.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
      559607ea
    • D
      io: add QIOTask class for async operations · b02db2d9
      由 Daniel P. Berrange 提交于 
      A number of I/O operations need to be performed asynchronously
to avoid blocking the main loop. The caller of such APIs need
to provide a callback to be invoked on completion/error and
need access to the error, if any. The small QIOTask provides
a simple framework for dealing with such probes. The API
docs inline provide an outline of how this is to be used.

Some functions don't have the ability to run asynchronously
(eg getaddrinfo always blocks), so to facilitate their use,
the task class provides a mechanism to run a blocking
function in a thread, while triggering the completion
callback in the main event loop thread. This easily allows
any synchronous function to be made asynchronous, albeit
at the cost of spawning a thread.

In this series, the QIOTask class will be used for things like
the TLS handshake, the websockets handshake and TCP connect()
progress.

The concept of QIOTask is inspired by the GAsyncResult
interface / GTask class in the GIO libraries. The min
version requirements on glib don't allow those to be
used from QEMU, so QIOTask provides a facsimilie which
can be easily switched to GTask in the future if the
min version is increased.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
      b02db2d9
    • P
      linux-user: convert DEBUG_SIGNAL logging to tracepoints · c8ee0a44
      由 Paolo Bonzini 提交于 
      "Unimplemented" messages go to stderr, everything else goes to tracepoints
Reviewed-by: NLaurent Vivier <lvivier@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
      c8ee0a44
    • P
      alpha: convert "naked" qemu_log to tracepoint · c6ce9f17
      由 Paolo Bonzini 提交于 
      Reviewed-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
      c6ce9f17
  13. 15 12月, 2015 3 次提交
    • G
      fw_cfg: add generic non-DMA read method · 38bf2093
      由 Gabriel L. Somlo 提交于 
      Introduce fw_cfg_data_read(), a generic read method which works
on all access widths (1 through 8 bytes, inclusive), and can be
used during both IOPort and MMIO read accesses.

To maintain legibility, only fw_cfg_data_mem_read() (the MMIO
data read method) is replaced by this patch. The new method
essentially unwinds the fw_cfg_data_mem_read() + fw_cfg_read()
combo, but without unnecessarily repeating all the validity
checks performed by the latter on each byte being read.

This patch also modifies the trace_fw_cfg_read prototype to
accept a 64-bit value argument, allowing it to work properly
with the new read method, but also remain backward compatible
with existing call sites.

Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Marc Marí <markmb@redhat.com>
Signed-off-by: NGabriel Somlo <somlo@cmu.edu>
Reviewed-by: NLaszlo Ersek <lersek@redhat.com>
Message-id: 1446733972-1602-6-git-send-email-somlo@cmu.edu
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
      38bf2093
    • B
      usb-mtp: Add support for inotify based file monitoring · 8e3e3897
      由 Bandan Das 提交于 
      For now, we use inotify watches to track only a small number of
events, namely, add, delete and modify. Note that for delete, the kernel
already deactivates the watch for us and we just need to
take care of modifying our internal state.

inotify is a linux only mechanism.
Suggested-by: NGerd Hoffman <kraxel@redhat.com>
Signed-off-by: NBandan Das <bsd@redhat.com>
Message-id: 1448314625-3855-4-git-send-email-bsd@redhat.com
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
      8e3e3897
    • B
      usb-mtp: use a list for keeping track of children · 4c7a67f5
      由 Bandan Das 提交于 
      To support adding/removal of objects, we will need to update
the object cache hierarchy we have built internally. Convert
to using a Qlist for easier management.
Signed-off-by: NBandan Das <bsd@redhat.com>
Message-id: 1448314625-3855-2-git-send-email-bsd@redhat.com
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
      4c7a67f5
  15. 03 12月, 2015 1 次提交
  17. 10 11月, 2015 22 次提交