Jan Kiszka [Tue, 1 Feb 2011 21:15:58 +0000 (22:15 +0100)]
kvm: Add MCE signal support for !CONFIG_IOTHREAD
Currently, we only configure and process MCE-related SIGBUS events if
CONFIG_IOTHREAD is enabled. The groundwork is laid, we just need to
factor out the required handler registration and system configuration.
Jan Kiszka [Tue, 1 Feb 2011 21:15:57 +0000 (22:15 +0100)]
kvm: Fix race between timer signals and vcpu entry under !IOTHREAD
Found by Stefan Hajnoczi: There is a race in kvm_cpu_exec between
checking for exit_request on vcpu entry and timer signals arriving
before KVM starts to catch them. Plug it by blocking both timer related
signals also on !CONFIG_IOTHREAD and process those via signalfd.
As this fix depends on real signalfd support (otherwise the timer
signals only kick the compat helper thread, and the main thread hangs),
we need to detect the invalid constellation and abort configure.
Jan Kiszka [Tue, 1 Feb 2011 21:15:54 +0000 (22:15 +0100)]
kvm: Refactor qemu_kvm_eat_signals
We do not use the timeout, so drop its logic. As we always poll our
signals, we do not need to drop the global lock. Removing those calls
allows some further simplifications. Also fix the error processing of
sigpending at this chance.
Jan Kiszka [Tue, 1 Feb 2011 21:15:53 +0000 (22:15 +0100)]
kvm: Set up signal mask also for !CONFIG_IOTHREAD
Block SIG_IPI, unblock it during KVM_RUN, just like in io-thread mode.
It's unused so far, but this infrastructure will be required for
self-IPIs and to process SIGBUS plus, in KVM mode, SIGIO and SIGALRM. As
Windows doesn't support signal services, we need to provide a stub for
the init function.
Jan Kiszka [Tue, 1 Feb 2011 21:15:52 +0000 (22:15 +0100)]
Refactor signal setup functions in cpus.c
Move {tcg,kvm}_init_ipi and block_io_signals to avoid prototypes, rename
the former two to clarify that they deal with more than SIG_IPI. No
functional changes - except for the tiny fixup of strerror usage.
The forward declaration of sigbus_handler is just temporarily, it will
be moved in a succeeding patch. dummy_signal is moved into the !_WIN32
block as we will soon need it also for !CONFIG_IOTHREAD.
Jan Kiszka [Tue, 1 Feb 2011 21:15:51 +0000 (22:15 +0100)]
kvm: Provide sigbus services arch-independently
Provide arch-independent kvm_on_sigbus* stubs to remove the #ifdef'ery
from cpus.c. This patch also fixes --disable-kvm build by providing the
missing kvm_on_sigbus_vcpu kvm-stub.
Jan Kiszka [Tue, 1 Feb 2011 21:15:47 +0000 (22:15 +0100)]
Flatten the main loop
First of all, vm_can_run is a misnomer, it actually means "no request
pending". Moreover, there is no need to check all pending requests
twice, the first time via the inner loop check and then again when
actually processing the requests. We can simply remove the inner loop
and do the checks directly.
Jan Kiszka [Tue, 1 Feb 2011 21:15:46 +0000 (22:15 +0100)]
Leave inner main_loop faster on pending requests
If there is any pending request that requires us to leave the inner loop
if main_loop, makes sure we do this as soon as possible by enforcing
non-blocking IO processing.
At this change, move variable definitions out of the inner loop to
improve readability.
Jan Kiszka [Tue, 1 Feb 2011 21:15:45 +0000 (22:15 +0100)]
Trigger exit from cpu_exec_all on pending IO events
Except for timer events, we currently do not leave the loop over all
VCPUs if an IO event was filed. That may cause unexpected IO latencies
under !CONFIG_IOTHREAD in SMP scenarios. Fix it by setting the global
exit_request which breaks the loop.
Jan Kiszka [Tue, 1 Feb 2011 21:15:44 +0000 (22:15 +0100)]
Process vmstop requests in IO thread
A pending vmstop request is also a reason to leave the inner main loop.
So far we ignored it, and pending stop requests issued over VCPU threads
were simply ignored.
Jan Kiszka [Tue, 1 Feb 2011 21:15:43 +0000 (22:15 +0100)]
Stop current VCPU on synchronous reset requests
If some I/O operation ends up calling qemu_system_reset_request in VCPU
context, we record this and inform the io-thread, but we do not
terminate the VCPU loop. This can lead to fairly unexpected behavior if
the triggering reset operation is supposed to work synchronously.
Fix this for TCG (when run in deterministic I/O mode) by setting the
VCPU on stop and issuing a cpu_exit. KVM requires some more work on its
VCPU loop.
Jan Kiszka [Tue, 1 Feb 2011 21:15:42 +0000 (22:15 +0100)]
Prevent abortion on multiple VCPU kicks
If we call qemu_cpu_kick more than once before the target was able to
process the signal, pthread_kill will fail, and qemu will abort. Prevent
this by avoiding the redundant signal.
Peter Maydell [Thu, 10 Feb 2011 15:47:14 +0000 (15:47 +0000)]
target-arm: Remove stray #include from middle of neon_helper.c
Remove a stray #include <stdio.h> from the middle of neon_helper.c:
it was harmless but pointless since we include stdio.h at the top
of the file anyway.
Peter Maydell [Thu, 10 Feb 2011 13:59:34 +0000 (13:59 +0000)]
softfloat: Fix compilation failures with USE_SOFTFLOAT_STRUCT_TYPES
Make softfloat compile with USE_SOFTFLOAT_STRUCT_TYPES defined, by
adding and using new macros const_float16(), const_float32() and
const_float64() so you can use array initializers in an array of
float16/float32/float64 whether the types are bare or wrapped in the
structs.
Peter Maydell [Thu, 10 Feb 2011 11:29:01 +0000 (11:29 +0000)]
target-arm: Use standard FPSCR for Neon half-precision operations
The Neon half-precision conversion operations (VCVT.F16.F32 and
VCVT.F32.F16) use ARM standard floating-point arithmetic, unlike
the VFP versions (VCVTB and VCVTT).
Fix various bugs in the single-to-half-precision conversion code:
* input NaNs not correctly converted in IEEE mode
(fixed by defining and using a commonNaNToFloat16())
* wrong values returned when converting NaN/Inf into non-IEEE
half precision value
* wrong values returned for conversion of values which are
on the boundary between denormal and zero for the half
precision format
* zeroes not correctly identified
* excessively large results in non-IEEE mode should
generate InvalidOp, not Overflow
Christophe Lyon [Thu, 10 Feb 2011 11:28:57 +0000 (11:28 +0000)]
softfloat: Honour default_nan_mode for float-to-float conversions
Honour the default_nan_mode flag when doing conversions between
different floating point formats, as well as when returning a NaN from
a two-operand floating point function. This corrects the behaviour
of float<->double conversions on both ARM and SH4.
Peter Maydell [Thu, 10 Feb 2011 11:28:56 +0000 (11:28 +0000)]
softfloat: Add float16 type and float16 NaN handling functions
Add a float16 type to softfloat, rather than using bits16 directly.
Also add the missing functions float16_is_quiet_nan(),
float16_is_signaling_nan() and float16_maybe_silence_nan(),
which are needed for the float16 conversion routines.
Aurelien Jarno [Wed, 9 Feb 2011 18:53:36 +0000 (19:53 +0100)]
Merge branch 'linux-user-for-upstream' of git://gitorious.org/qemu-maemo/qemu
* 'linux-user-for-upstream' of git://gitorious.org/qemu-maemo/qemu:
linux-user: fix for loopmount ioctl
linux-user: fix build errors for mmap2-only ports
user: speed up init_paths a bit
linux-user: implement sched_{g,s}etaffinity
linux-user/FLAT: allow targets to override FLAT processing
linux-user/FLAT: fix auto-stack sizing
linux-user: decode MAP_{UNINITIALIZED,EXECUTABLE} in strace
linux-user: add ppoll syscall support
linux-user/elfload: add FDPIC support
linux-user: fix sizeof handling for getsockopt
linux-user: Fix possible realloc memory leak
linux-user: Add support for -version option
Chris Dearman [Wed, 9 Feb 2011 03:03:30 +0000 (19:03 -0800)]
[PATCH] [MIPS] Clear softfpu exception state for round, trunc, ceil and floor
MIPS FPU instructions should start with a clean softfpu status. This
is done for the arithmetic operations and cvt instructions, but not
for round, trunc, ceil and floor.
Juha Riihimäki [Wed, 9 Feb 2011 15:42:32 +0000 (15:42 +0000)]
target-arm: Fix VQMOVUN Neon instruction.
VQMOVUN does a signed-to-unsigned saturating conversion. This is
different from both the signed-to-signed and unsigned-to-unsigned
conversions already implemented, so we need a new set of helper
functions (neon_unarrow_sat*).
Martin Mohring [Tue, 8 Feb 2011 12:48:56 +0000 (14:48 +0200)]
linux-user: fix for loopmount ioctl
In case a chrooted build uses XEN or KVM, a looped mount needs to be done to setup the chroot.
The ioctl for loop mount works correctly for arm, mips, ppc32 and sh4, so its now activated.
Mike Frysinger [Mon, 7 Feb 2011 06:05:57 +0000 (01:05 -0500)]
linux-user: fix build errors for mmap2-only ports
The current print_mmap func is only enabled when the target supports the
mmap syscall, but both mmap and mmap2 syscalls use it. This leads to a
build failure when the target supports mmap2 but not mmap.
Mike Frysinger [Mon, 7 Feb 2011 06:05:56 +0000 (01:05 -0500)]
user: speed up init_paths a bit
The current init_paths code will attempt to opendir() every single file it
finds. This can obviously generated a huge number of syscalls with even a
moderately small sysroot that will fail. Since the readdir() call provides
the file type in the struct itself, use it. On my system, this prevents
over 1000 syscalls from being made at every invocation of a target binary,
and I only have a C library installed.
Mike Frysinger [Mon, 7 Feb 2011 06:05:54 +0000 (01:05 -0500)]
linux-user/FLAT: allow targets to override FLAT processing
This brings flatload.c more in line with the current Linux FLAT loader
which allows targets to handle various FLAT aspects in their own way.
For the common behavior, the new functions get stubbed out.
Mike Frysinger [Mon, 7 Feb 2011 06:05:53 +0000 (01:05 -0500)]
linux-user/FLAT: fix auto-stack sizing
The current auto-stack sizing works like it does on a NOMMU system; the
problem is that this only works if the envp/argv arrays are fairly slim.
On a desktop system, this is rarely the case, and can easily blow past
the stack and into data/text regions as the default stack for FLAT progs
is a mere 4KiB. So rather than rely on the NOMMU calculation (which is
only there because NOMMU can't easily allocate gobs of contiguous mem),
calc the full space actually needed and let the MMU host make space.
Alexander Graf [Tue, 1 Feb 2011 14:51:31 +0000 (15:51 +0100)]
ahci: make number of ports runtime determined
Different AHCI controllers have a different number of ports, so the core
shouldn't care about the amount of ports available.
This patch makes the number of ports available to the AHCI core runtime
configurable, allowing us to have multiple different AHCI implementations
with different amounts of ports.
Alexander Graf [Tue, 1 Feb 2011 14:51:30 +0000 (15:51 +0100)]
ahci: Implement HBA reset
The ahci code was missing its soft reset functionality. This wasn't really an
issue for Linux guests, but Windows gets confused when the controller doesn't
reset when it tells it so.
Using this patch I can now successfully boot Windows 7 from AHCI using AHCI
enabled SeaBIOS.
Alexander Graf [Tue, 1 Feb 2011 14:51:28 +0000 (15:51 +0100)]
ahci: split ICH and AHCI even more
Sebastian's patch already did a pretty good job at splitting up ICH-9
AHCI code and the AHCI core. We need some more though. Copyright was missing,
the lspci dump belongs to ICH-9, we don't need the AHCI core to have its
own qdev device duplicate.
So let's split them a bit more in this patch, making things easier to
read an understand.
There are multiple ahci devices out there. The currently implemented ich-9
is only one of the many. So let's split that one out into a separate file
to stress the difference.
Stefan Weil [Fri, 4 Feb 2011 20:01:16 +0000 (21:01 +0100)]
block/vdi: Fix wrong size in conditionally used memset, memcmp
Error report from cppcheck:
block/vdi.c:122: error: Using sizeof for array given as function argument returns the size of pointer.
block/vdi.c:128: error: Using sizeof for array given as function argument returns the size of pointer.
Fix both by setting the correct size.
The buggy code is only used when QEMU is build without uuid support.
The bug is not critical, so there is no urgent need to apply it to
old versions of QEMU.
Peter Maydell [Thu, 3 Feb 2011 19:43:25 +0000 (19:43 +0000)]
target-arm: Fix decoding of Thumb preload and hint space
Refine the decoding of the Thumb preload and hint space, so we
UNDEF on the patterns that are supposed to UNDEF rather than NOP.
We also move the tests for this space earlier, so we don't emit
harmless but unnecessary address generation code for preload
hints (which by their nature are likely to be in hot code paths).
Peter Maydell [Thu, 3 Feb 2011 19:43:24 +0000 (19:43 +0000)]
target-arm: Fix decoding of preload and memory hint space
Correct the decoding of the ARM preload and memory hint space,
by adding decoding of PLI, PLDW and the v7MP unallocated hint
space. This commit also corrects a slightly overexuberant
decoding of PLD(register) which was not checking that bit 4
was one.
Jan Kiszka [Thu, 3 Feb 2011 21:54:13 +0000 (22:54 +0100)]
ioapic: Add support for qemu-kvm's vmstate v2
qemu-kvm carries the IOAPIC base address in its v2 vmstate. We only
support the default base address so far, and saving even that in the
device state was rejected.
Add a padding field to be able to read qemu-kvm's old state, but
increase our version to 3, indicating that we are not saving a valid
address. This also gives downstream the chance to change to stop
evaluating the base_address and move to v3 as well.
Jan Kiszka [Thu, 3 Feb 2011 21:54:11 +0000 (22:54 +0100)]
ioapic: Implement EOI handling for level-triggered IRQs
Add the missing EOI broadcast from local APIC to the IOAPICs on
completion of level-triggered IRQs. This ensures that a still asserted
IRQ source properly re-triggers an APIC IRQ.
Corentin Chary [Fri, 4 Feb 2011 08:05:53 +0000 (09:05 +0100)]
vnc: qemu can die if the client is disconnected while updating screen
agraf reported that qemu_mutex_destroy(vs->output_mutex) while failing
in vnc_disconnect_finish().
It's because vnc_worker_thread_loop() tries to unlock the mutex while
not locked. The unlocking call doesn't fail (pthread bug ?), but
the destroy call does.
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