Map the I/O interruption code before calling into css.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Trigger the code for our virtual css in case of instruction
intercepts for I/O instructions.
Handle the tsch exit for the subchannel-related part of tsch.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Provide a mechanism for qemu to provide fully virtual subchannels to
the guest.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Provide handlers for (most) channel I/O instructions.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
I/O interrupts are queued per isc. Only crw pending machine checks
are supported.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Add s390_cpu_physical_memory_{map,unmap} with special handling
for the lowcore.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Create a lowcore mapping helper that includes a check for sufficient
length.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This will allow each architecture to define how the VCPU ID is set on
the KVM_CREATE_VCPU ioctl call.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Acked-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Allow virtio machines to register for different diag500 function
codes and convert s390-virtio to use it.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Since commit "s390: Add CPU reset handler" the CPU's instance_init
registers a reset callback. Unregister that on instance_finalize.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
In one of the last commits we accidently got 3-space indentation into
the tree. Fix it up so it's 4 spaces wide.
Reported-by: Andreas Faerber <afaerber@suse.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
Add a CPU reset handler to have all CPUs in a PoP compliant
state.
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
[agraf: move hw/hw.h into existing ifdef]
Signed-off-by: Alexander Graf <agraf@suse.de>
The function is only used in misc_helper.c, so move it to that file.
This reduces the size of debug executables (compiled without optimization)
because they get unused code and data for each compilation which includes
cpu.h.
Executables with optimization don't change their size.
ebcdic2ascii is currently unused and could be removed (not done here).
The array ascii2ebcdic must be accessed with an unsigned index, therefore
(int)ascii[i] was replaced by (uint8_t)ascii[i]. The old code would have
failed for a signed char less than 0. The current code only converts
"QEMU" and spaces to EBCDIC, so there is no problem today.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
This enables qemu -cpu help to return a list of supported CPU models
on s390 and also to query for cpu definitions in the monitor.
Initially only cpu model = host is returned. This needs to be reworked
into a full-fledged CPU model handling later on.
This change is needed to allow libvirt exploiters (like OpenStack)
to specify a CPU model.
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
[agraf: fix s390x-linux-user, adjust header locations]
Signed-off-by: Alexander Graf <agraf@suse.de>
IBMs s390 contributions were meant to to be gplv2 or later (since
we were contributing to qemu). Several of the s390 specific files
link to gpl code anyway, so lets clarify the licence statement for
new contributions for those files that we have touched multiple
times or will likely touch again.
This patch does not touch files that mostly deal with tcg.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Note that target-alpha accesses this field from TCG, now using a
negative offset. Therefore the field is placed last in CPUState.
Pass PowerPCCPU to [kvm]ppc_fixup_cpu() to facilitate this change.
Move common parts of mips cpu_state_reset() to mips_cpu_reset().
Acked-by: Richard Henderson <rth@twiddle.net> (for alpha)
[AF: Rebased onto ppc CPU subclasses and openpic changes]
Signed-off-by: Andreas Färber <afaerber@suse.de>
The division routines do not read or write tcg registers,
but can raise fixed-point divide exceptions.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Don't load the displacement into a register first, add it second
so that tcg_gen_addi_i64 can eliminate zeros. Don't mask the
displacement first so that we don't turn small negative numbers
into large positive numbers.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Giving the proper mask to disas_jcc allows us to generate an inline
comparison generating the carry/borrow with setcond.
In the very worst case, when we must use the external helper to compute
a value for CC, we generate (cc > 1) instead of (cc >> 1), which is only
very slightly slower on common cpus.
In the very best case, when the CC comes from a COMPARE insn and the
compiler is using ALCG with zero, everything folds out to become just
the setcond that the compiler wanted.
Signed-off-by: Richard Henderson <rth@twiddle.net>
After full conversion, we can audit the uses of LTGT cc ops
and see that none of the instructions can ever set CC=3.
Thus we can extend the table to treat that bit as ignored.
This fixes a regression wrt the pre-conversion translation
in which NE was used for both m=6 and m=7.
Signed-off-by: Richard Henderson <rth@twiddle.net>
While they aren't expensive, they aren't free to process. When we
know that the three cc helper variables are dead, don't kill them.
Signed-off-by: Richard Henderson <rth@twiddle.net>
There's no need to force computation of the true cc_op when taking an
exception or single stepping. In either case we'll enter the next TB
with s->cc_op = DYNAMIC and recompute anyway. Just make sure that
s->cc_op is stored back to env->cc_op as needed.
Delete some dead functions, avoid allocating unused TCG temps, drop
the old s->is_jmp setting.
Signed-off-by: Richard Henderson <rth@twiddle.net>
