Wrap also simple operations consisting only of a single step with
memory_region_transaction_begin/commit. This allows to perform
additional steps like coalesced MMIO flushing from a single place.

This requires dropping some micro-optimizations: The skipping of
topology updates after updating disabled or unregistered regions.
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>

Instead of flushing pending coalesced MMIO requests on every vmexit,
this provides a mechanism to selectively flush when memory regions
related to the coalesced one are accessed. This first of all includes
the coalesced region itself but can also applied to other regions, e.g.
of the same device, by calling memory_region_set_flush_coalesced.
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>

Move the init of the irqchip_inject_ioctl field of KVMState out of
kvm_irqchip_create() and into kvm_init(), so that kvm_set_irq()
can be used even when no irqchip is created (for architectures
that support async interrupt notification even without an in
kernel irqchip).
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>

Rather than hardcoding the list of architectures in the kernel
header update script, just import headers for every architecture
which supports KVM (with a blacklist exception for ia64 which
has KVM headers but is dead). This reduces the number of QEMU
files which need to be updated to add support for a new KVM
architecture.
Acked-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>

* 'usb.64' of git://git.kraxel.org/qemu: (54 commits)
  xhci: allow bytewise capability register reads
  xhci: kill xhci_mem_{read,write} dispatcher functions
  xhci: support multiple interrupters
  xhci: pick target interrupter
  xhci: prepare xhci_runtime_{read,write} for multiple interrupters
  xhci: add XHCIInterrupter
  xhci: move register update into xhci_intr_raise
  xhci: add msix support
  xhci: rework interrupt handling
  xhci: fix & cleanup msi.
  usb-storage: usb3 support
  usb3: bos decriptor
  usb3: superspeed endpoint companion
  usb3: superspeed descriptors
  xhci: update port handling
  xhci: update register layout
  xhci: fix runtime write tracepoint
  xhci: add trace_usb_xhci_ep_set_dequeue
  xhci: trace cc codes in cleartext
  xhci: iso xfer support
  ...

optimizer.c contains some cases were the break is appearing in both the
if and the else parts. Fix that by moving it to the outer part. Also
move some common code there.
Reviewed-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Reviewed-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Reviewed-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

brcond and setcond ops are not commutative, but it's easy to compute the
new condition after swapping the arguments. Try to always put the constant
argument in second position like for commutative ops, to help backends to
generate better code.
Reviewed-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

shift/rot r, 0, a is equivalent to movi r, 0.
Reviewed-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

and r, a, 0 is equivalent to a movi r, 0.
Reviewed-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

or/xor r, a, 0 is equivalent to a mov r, a.
Reviewed-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Split expression simplification in multiple parts so that a given op
can appear multiple times. This patch should not change anything.
Reviewed-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Now that there are two passes of optimization (optimize.c, liveness)
there is no point of outputing the statistics of the liveness part
only. Update the code to take into account both optimizations.
Reviewed-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Some guests need this according to
Alejandro Martinez Ruiz <alex@securiforest.com>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

... and register subregions instead, so we offload the dispatching
to the the memory subsystem which is designed to handle it.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Everything is in place, flip the big switch now
and enable support for multiple interrupters.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Pick the correct interrupter when queuing an event.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Prepare xhci runtime register access function for multiple interrupters.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Move all state belonging to the (single) interrupter into a separate
struct.  First step in adding support for multiple interrupters.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Now that we have a separate function to raise an IRQ we can move
some comon code into the function.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Split xhci_irq_update into a function which handles intx updates
(including lowering the irq line once the guests acks the interrupt)
and one which is used for raising an irq only.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Drop custom write_config function which isn't needed any more.
Make the msi property a bit property so it accepts 'on' & 'off'.
Enable MSI by default.

TODO: add compat property to disable on old machine types.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Add usb3 descriptors to usb-storage, so it shows up as superspeed
device when connected to xhci.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Add support for creating BOS descriptor and
device cappability descriptors.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Add support for building superspeed endpoint companion descriptors,
create them for superspeed usb devices.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Add superspeed descriptor entry to USBDesc,
advertise superspeed support when present.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

This patch changes the way xhci ports are linked to USBPorts.  The fixed
1:1 relationship between xhci ports and USBPorts is gone.  Now each
USBPort represents a physical plug which has usually two xhci ports
assigned: one usb2 and ond usb3 port.  usb devices show up at one or the
other, depending on whenever they support superspeed or not.

This patch also makes the number of usb2 and usb3 ports runtime
configurable by adding 'p2' and 'p3' properties.  It is allowed to
have different numbers of usb2 and usb3 ports.  Specifying p2=4,p3=2
will give you an xhci adapter which supports all speeds on physical
ports 1+2 and usb2 only on ports 3+4.

Change the register layout to be a bit more sparse and also not depend
on the number of ports.  Useful when for making the number of ports
runtime-configurable.

Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Add support for iso transfers.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Implement mfindex register and mfindex wrap event.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

This patch splits the xhci_xfer_data function into three.
The xhci_xfer_data function used to do does two things:

  (1) copy transfer data between guest memory and a temporary buffer.
  (2) report transfer results to the guest using events.

Now we three functions to handle this:

  (1) xhci_xfer_map creates a scatter list for the transfer and
      uses that (instead of the temporary buffer) to build a
      USBPacket.
  (2) xhci_xfer_unmap undoes the mapping.
  (3) xhci_xfer_report sends out events.

The patch also fixes reporting of transaction errors which must be
reported unconditinally, not only in case the guest asks for it
using the ISP flag.

[ v2: fix warning ]
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

original xhci code (the one which used libusb directly) used to use
'background transfers' for iso streams.  In upstream qemu the iso
stream buffering is handled by usb-host & usb-redir, so we will
never ever need this.  It has been left in as reference, but is dead
code anyway.  Rip it out.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

usb-audio is a full speed (1.1) device,
but bcdUSB claims it is usb 2.0.  Fix it.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

Windows users need to know that they have to use the Baum driver to make
the qemu braille device work.
Signed-off-by: NSamuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>