1) dont register i386 qemu on x86_64 host
2) widen sparc and arm match
3) add sh4, based on patch by David Kozub <zub@linux.fjfi.cvut.cz>

Rest based on patch by Jan-Simon Möller <jsmoeller@linuxfoundation.org>

Some compilers detect that new_stack isnt used after dd75d784
Signed-off-by: NRiku Voipio <riku.voipio@nokia.com>

Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NRiku Voipio <riku.voipio@nokia.com>

Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NRiku Voipio <riku.voipio@nokia.com>

Restore the VFP registers from the ucontext on return from a signal
handler in linux-user mode. This means that signal handlers cannot
accidentally corrupt the interrupted code's VFP state, and allows
them to deliberately modify the state via the ucontext structure.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NRiku Voipio <riku.voipio@nokia.com>

For ARM linux-user mode signal handlers, fill in the ucontext with
VFP register contents in the same way that the kernel does. We only
do this for v2 format sigframe (2.6.12 and above); this is actually
bug-for-bug compatible with the older kernels, which don't save and
restore VFP registers either.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NRiku Voipio <riku.voipio@nokia.com>

Expose the vfp_get_fpscr() and vfp_set_fpscr() functions to C
code as well as generated code, so we can use them to read and
write the FPSCR when saving and restoring VFP registers across
signal handlers in linux-user mode.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NRiku Voipio <riku.voipio@nokia.com>

The padding in the target_ucontext_v2 is defined by the size of
the target's sigset_t type, not the host's. (This bug only causes
problems when we start using the uc_regspace[] array to expose
VFP registers to userspace signal handlers.)
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NRiku Voipio <riku.voipio@nokia.com>

In linux-user mode, the XScale/iWMMXT coprocessors must be enabled
at reset so that we can run code that uses these instructions.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

n setsockopt, the socket level options are translated to the hosts'
architecture before the real syscall is called, e.g.
TARGET_SO_TYPE -> SO_TYPE. This patch does the same with getsockopt.

Tested on a x86 host emulating MIPS.  Without it:-

$ grep getsockopt host.strace
31311 getsockopt(3, SOL_SOCKET, 0x1007 /* SO_??? */, 0xbff17208,
0xbff17204) = -1 ENOPROTOOPT (Protocol not available)

With:-

$ grep getsockopt host.strace
25706 getsockopt(3, SOL_SOCKET, SO_ERROR, [0], [4]) = 0

Whitespace cleanup: Riku Voipio
Signed-off-by: NJamie Lentin <jm@lentin.co.uk>
Signed-off-by: NRiku Voipio <riku.voipio@iki.fi>

Remove an unnecessary local variable from the __get_user() and
__put_user() macros. This avoids confusing compilation failures
if the name of the local variable ('size') happens to be the
same as the variable the macro user is trying to read/write.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NRiku Voipio <riku.voipio@nokia.com>

Running programs that create large numbers of threads, such as this
snippet from libstdc++'s pthread7-rope.cc:

  const int max_thread_count = 4;
  const int max_loop_count = 10000;
  ...
  for (int j = 0; j < max_loop_count; j++)
    {
      ...
      for (int i = 0; i < max_thread_count; i++)
	pthread_create (&tid[i], NULL, thread_main, 0);

      for (int i = 0; i < max_thread_count; i++)
	pthread_join (tid[i], NULL);
    }

in user-mode emulation will quickly run out of memory.  This is caused
by a failure to free memory in do_syscall prior to thread exit:

          /* TODO: Free CPU state.  */
          pthread_exit(NULL);

The first step in fixing this is to make all TaskStates used by QEMU
dynamically allocated.  The TaskState used by the initial thread was
not, as it was allocated on main's stack.  So fix that, free the
cpu_env, free the TaskState, and we're home free, right?

Not exactly.  When we create a thread, we do:

        ts = qemu_mallocz(sizeof(TaskState) + NEW_STACK_SIZE);
        ...
        new_stack = ts->stack;
        ...
        ret = pthread_attr_setstack(&attr, new_stack, NEW_STACK_SIZE);

If we blindly free the TaskState, then, we yank the current (host)
thread's stack out from underneath it while it still has things to do,
like calling pthread_exit.  That causes problems, as you might expect.

The solution adopted here is to let the C library allocate the thread's
stack (so the C library can properly clean it up at pthread_exit) and
provide a hint that we want NEW_STACK_SIZE bytes of stack.

With those two changes, we're done, right?  Well, almost.  You see,
we're creating all these host threads and their parent threads never
bother to check that their children are finished.  There's no good place
for the parent threads to do so.  Therefore, we need to create the
threads in a detached state so the parent thread doesn't have to call
pthread_join on the child to release the child's resources; the child
does so automatically.

With those three major changes, we can comfortably run programs like the
above without exhausting memory.  We do need to delete 'stack' from the
TaskState structure.
Signed-off-by: NNathan Froyd <froydnj@codesourcery.com>
Signed-off-by: NRiku Voipio <riku.voipio@nokia.com>

mmap_reserve() should be called only when RESERVED_VA is enabled.
Otherwise, unmaped virtual address space will never be reusable. This
bug will exhaust virtual address space in extreme conditions.
Signed-off-by: NRiku Voipio <riku.voipio@nokia.com>

Signed-off-by: NRiku Voipio <riku.voipio@nokia.com>

msix.o and msi.o get pulled into the build unconditionally for QMP.
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

We still need advance address even we find there's no dirty pages in
current chunk.
Signed-off-by: NJason Wang <jasowang@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

I'd like to disable bandwidth limit or make it very high,
Use int64_t all over to make values >= 4g work.
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Tested-by: NJason Wang <jasowang@redhat.com>

This makes ram block ordering under migration stable, ordered by offset.
This is especially useful for migration to exec, for debugging.
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Tested-by: NJason Wang <jasowang@redhat.com>

The usermode version of qemu_ld doesn't used mem_index,
leading to set-but-not-used warnings.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NEdgar E. Iglesias <edgar@axis.com>

A typo in the usermode address calculation path; R3 used where R2 needed.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NEdgar E. Iglesias <edgar@axis.com>

Use ld4 not ld8 for reading the tlb of 32-bit targets.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NEdgar E. Iglesias <edgar@axis.com>

The port was not properly merged following
86feb1c8Signed-off-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NEdgar E. Iglesias <edgar@axis.com>

Fix compilation error when GUEST_BASE is not defined.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NEdgar E. Iglesias <edgar@axis.com>

The arguments to tcg_gen_helper32 for these functions were not
updated correctly in rev 2bece2c8.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NEdgar E. Iglesias <edgar@axis.com>

Conflicts:
	Makefile.objs
	hw/virtio.c

I make no claims that this is accurate or exhaustive but I think it's a
reasonable place to start.

As the file mentions, the purpose of this file is to give contributors
information about who they can go to with questions about a particular piece of
code or who they can ask for review.

If you sign up for a piece of code and indicate that it's Maintained or
Supported, please be prepared to be responsive to questions about that
subsystem.
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
---

v1 -> v2
 - Sort alphabetically
 - Copy in instructions from linux MAINTAINERS
 - Fix entries based on review feedback

Whenever SSBM is reset in the command register all state information is lost.
Restarting DMA means that current_addr must be reset to the base address of the
PRD table. The OS is not required to change the base address register before
starting a DMA operation, it can reuse the value it wrote for an earlier
request.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Reviewed-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>

You can only start a DMA transfer if it's not running yet, and you can only
cancel it if it's running.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Reviewed-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>

BMIDEA in the status register must be cleared on error. This makes FreeBSD
respond (more) correctly to I/O errors.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Reviewed-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>

Several places that stop a DMA transfer duplicate this code. Factor it out into
a common function.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Reviewed-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>

Add file missing from last commit.
Signed-off-by: NPaul Brook <paul@codesourcery.com>

The core pcnet emulation code is used by both the PCI "pcnet" device
and the SPARC "lance" device.  Split the common code frm the PCI code so
that that can be configures independantly.
Signed-off-by: NPaul Brook <paul@codesourcery.com>

None of the (current) sparc32 machines have a PCI bus, so remove the PCI
code from these configs.
Signed-off-by: NPaul Brook <paul@codesourcery.com>

Terminate make_device_config.sh if the awk command fails.
Typically this means a missing file.
Signed-off-by: NPaul Brook <paul@codesourcery.com>

Fix breakage from previous commit (missing pci.mak, and incorrect
include in default-configs/s390x-softmmu.mak).
Signed-off-by: NPaul Brook <paul@codesourcery.com>

Make virtio devices optional.  Selecting individual devices is not useful
as the host bindings are all in one file.
Signed-off-by: NPaul Brook <paul@codesourcery.com>