The KVM interrupt injection path is non-generic for now. So we need to push
knowledge of how to inject a device interrupt using KVM into the actual device
code.
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

This patch adds some code paths for running s390x guest OSs without the
need for KVM.
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

We need to add some more logic to the CPU description to leverage emulation
of an s390x CPU. This patch adds all the required helpers, fields in CPUState
and constant definitions required for user and system emulation.
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

This provides a consistent naming scheme across all targets.
Signed-off-by: NLluís Vilanova <vilanova@ac.upc.edu>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Signed-off-by: NAlon Levy <alevy@redhat.com>
Tested-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

MIPS FPU instructions should start with a clean softfpu status. This
is done for the most instructions, but not for comparison ones.
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Contrary to cabs.ps.* instructions, c.ps.* should not compare the absolute
value of the operand, but directly the operands.
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

As the softfloat comparison functions already test for NaN, there is no
need to always call the float*_unordered*() functions.
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

efstst*() functions are fast SPE funtions which do not take into account
special values (infinites, NaN, etc.), while efscmp*() functions are
IEEE754 compliant.

Given that float32_*() functions are IEEE754 compliant, the efscmp*()
functions are correctly implemented, while efstst*() are not. This
patch reverse the implementation of this two groups of functions and
fix the comments. It also use float32_eq() instead of float32_eq_quiet()
as qNaNs should not be ignored.

Cc: Alexander Graf <agraf@suse.de>
Cc: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Make clear for all comparison functions which ones trigger an exception
for all NaNs, and which one only for sNaNs.
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

I am not a big fan of code moving, but having the signaling version in
the middle of quiet versions and vice versa doesn't make the code easy
to read.

This patch is a simple code move, basically swapping locations of
float*_eq and float*_eq_quiet.
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

float*_eq_signaling functions have a different semantics than other
comparison functions. Fix that by renaming float*_quiet_signaling() into
float*_eq().

Note that it is purely mechanical, and the behaviour should be unchanged.
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

float*_eq functions have a different semantics than other comparison
functions. Fix that by first renaming float*_quiet() into float*_eq_quiet().

Note that it is purely mechanical, and the behaviour should be unchanged.
That said it clearly highlight problems due to this different semantics,
they are fixed later in this patch series.

Cc: Alexander Graf <agraf@suse.de>
Acked-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

SSE instructions CMPUNORDPS/D and CMPORDPS/D do not trigger an invalid
exception if operands are qNANs.
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Use the new float*_unordered*() functions from softfloat instead of
redefining a private version.
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Use float64_unordered_quiet() in helper_cmptun() instead of doing the
the comparison manually.

According to the "Alpha Compiler Writer's Guide", we should use the
_quiet version here, as CMPTUN and CMPTEQ should generate InvalidOp
for SNaNs but not for QNaNs.

Thanks to Peter Maydell <peter.maydell@linaro.org> and Richard
Henderson <rth@twiddle.net> for digging into the manuals.
Acked-by: NRichard Henderson  <rth@twiddle.net>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Add float*_unordered_quiet() functions to march the softfloat versions.
As FPU status is not tracked with softfloat-native, they don't differ
from the signaling version.
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Add float*_unordered() functions to softfloat, matching the softfloat-native
ones. Also add float*_unordered_quiet() functions to match the others
comparison functions.

This allow target-i386/ops_sse.h to be compiled with softfloat.
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Add floatx_{add,mul,sub} defines, and use them instead of using direct
C operations.
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Use float unions from cpu-all.h instead of redefining new (wrong for arm)
ones in target-i386. This also allows building cpu-exec.o with softfloat.
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Use CPU_LDoubleU in cpu_dump_state() instead of redefining a union for
doing the conversion.

Based on a patch from Laurent Vivier <laurent@vivier.eu>.

Cc: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Add a CPU_LDoubleU type, matching the floatx80 definition and the long
double type on x86 hosts.

Based on a patch from Laurent Vivier <laurent@vivier.eu>.

Cc: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Softfloat has its own implementation to count the leading zeros. However
a lot of architectures have either a dedicated instruction or an
optimized to do that. When using GCC >= 3.4, this patch uses GCC builtins
instead of the handcoded implementation.

Note that I amware that QEMU_GNUC_PREREQ is defined in osdep.h and that
clz32() and clz64() are defined in host-utils.h, but I think it is better
to keep the softfloat implementation self contained.
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

Signed-off-by: NBrad Hards <bradh@frogmouth.net>
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>

This isn't used, but leaving it empty causes valgrind noise.
Signed-off-by: NBrad Hards <bradh@frogmouth.net>
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>

Signed-off-by: NBrad Hards <bradh@frogmouth.net>
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>

Signed-off-by: NBrad Hards <bradh@frogmouth.net>
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>

helpfull -> helpful
usefull -> useful
cotrol -> control

and a grammar fix.
Signed-off-by: NStefan Weil <weil@mail.berlios.de>
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>

Move a few migration related declarations to migration.h.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Move declarations of CPU related functions to cpus.h. Adjust the only user.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Move declarations for clock related functions from sysemu.h to qemu-timer.h.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Move generic or OS related function declarations and macro
TFR to qemu-common.h.

Move win32 include directives to qemu-os-win32.h. While moving,
also add #include <winsock2.h> to fix a recent mingw32
build breakage.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

In some cases qemu-common.h or qemu-timer.h can be used in place
of sysemu.h.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Remove unused sysemu.h include directives to speed up build
with the following patches.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

The name ERROR is too generic, it conflicts with mingw32 ERROR definition.

Replace ERROR with IN_ERROR.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

If the memory size given on the command line is equal to the
maximum size of memory defined by the hardware, there is no
"empty slot" after physical memory.

The following command

		qemu-system-sparc -m 256

raised an assertion:
exec.c:2614: cpu_register_physical_memory_offset: Assertion `size' failed

This can be fixed either at the caller side (don't call empty_slot_init)
or in empty_slot_init (do nothing) when size == 0. The second solution
was choosen here because it is more robust.
Signed-off-by: NStefan Weil <weil@mail.berlios.de>

It is purely for icount-based virtual timers.  And now that we got the
code right, rename the function to clarify the intended scope.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Tested-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>
Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>

This reverts commits 225d02cd and c9f7383c.  While some parts of
the latter could be saved, I preferred a smooth, complete revert.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Tested-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>
Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>

The previous patch however is not enough, because if the virtual CPU
goes to sleep waiting for a future timer interrupt to wake it up, qemu
deadlocks.  The timer interrupt never comes because time is driven by
icount, but the vCPU doesn't run any insns.

You could say that VCPUs should never go to sleep in icount
mode if there is a pending vm_clock timer; rather time should
just warp to the next vm_clock event with no sleep ever taking place.
Even better, you can sleep for some time related to the
time left until the next event, to avoid that the warps are too visible
externally; for example, you could be sending network packets continously
instead of every 100ms.

This is what this patch implements.  qemu_clock_warp is called: 1)
whenever a vm_clock timer is adjusted, to ensure the warp_timer is
synchronized; 2) at strategic points in the CPU thread, to make sure
the insn counter is synchronized before the CPU starts running.
In any case, the warp_timer is disabled while the CPU is running,
because the insn counter will then be making progress on its own.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Tested-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>
Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>