Let's rename PSW_MASK_ESA_ADDR to PSW_MASK_SHORT_ADDR because we're
not working with a ESA PSW which would not support the extended
addressing bit. Also let's actually use it.
Additionally we introduce PSW_MASK_SHORT_CTRL and use it throughout
the codebase.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20200227092341.38558-1-frankja@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
There is a special quiesce PSW that we check for "shutdown". Otherwise disabled
wait is detected as "crashed". Architecturally we must only check PSW bits
116-127. Fix this.
Cc: qemu-stable@nongnu.org
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-Id: <1582204582-22995-1-git-send-email-borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Up to now we only had an ioctl to reset vcpu data QEMU couldn't reach
for the initial reset, which was also called for the clear reset. To
be architecture compliant, we also need to clear local interrupts on a
normal reset.
Because of this and the upcoming protvirt support we need to add
ioctls for the missing clear and normal resets.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Acked-by: David Hildenbrand <david@redhat.com>
Message-Id: <20200214151636.8764-3-frankja@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
RNSBG is handled via the op_rosbg() helper function. But RNSBG has
the opcode 0xEC54, i.e. 0x54 as second byte, while op_rosbg() currently
checks for 0x55. This seems to be a typo, fix it to use 0x54 instead,
so that op_rosbg() does not abort() anymore if a program uses RNSBG.
I've checked with a simple test function that I now get the same results
with KVM and with TCG:
static void test_rnsbg(void)
{
uint64_t r1, r2;
r2 = 0xffff000000000000UL;
r1 = 0x123456789bdfaaaaUL;
asm volatile (" rnsbg %0,%1,12,61,16 " : "+r"(r1) : "r"(r2));
printf("r1 afterwards: 0x%lx\n", r1);
}
Buglink: https://bugs.launchpad.net/qemu/+bug/1860920
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20200130133417.10531-1-thuth@redhat.com>
Fixes: d6c6372e18 ("target-s390: Implement R[NOX]SBG")
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Use an explicit boolean type.
This commit was produced with the included Coccinelle script
scripts/coccinelle/exec_rw_const.
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
This commit was produced with the included Coccinelle script
scripts/coccinelle/exec_rw_const.
Two lines in hw/net/dp8393x.c that Coccinelle produced that
were over 80 characters were re-wrapped by hand.
Suggested-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
The logic was inverted and reported running if the cpu was stopped.
Let's fix that.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Fixes: d1b468bc88 ("s390x/tcg: implement SIGP SENSE RUNNING STATUS")
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20200124134818.9981-1-frankja@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
The separate pointer is now redundant.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200123232248.1800-6-richard.henderson@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
I believe that the separate allocation of DisasFields from DisasContext
was meant to limit the places from which we could access fields. But
that plan did not go unchanged, and since DisasContext contains a pointer
to fields, the substructure is accessible everywhere.
By allocating the substructure with DisasContext, we improve the locality
of the accesses by avoiding one level of pointer chasing. In addition,
we avoid a dangling pointer to stack allocated memory, diagnosed by static
checkers.
Launchpad: https://bugs.launchpad.net/bugs/1661815
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200123232248.1800-5-richard.henderson@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
All callers pass s->fields, so we might as well pass s directly.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200123232248.1800-4-richard.henderson@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
The DisasFields data is available from DisasContext.
We do not need to pass a separate argument.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200123232248.1800-3-richard.henderson@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
We will want to include the struct in DisasContext.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200123232248.1800-2-richard.henderson@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
The AIS feature has been disabled late in the v2.10 development cycle since
there were some issues with migration (see commit 3f2d07b3b0 -
"s390x/ais: for 2.10 stable: disable ais facility"). We originally wanted
to enable it again for newer machine types, but apparently we forgot to do
this so far. Let's do it now for the machines that support proper CPU models.
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1756946
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20200122101437.5069-1-thuth@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Tested-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Commit ae71ed8610 replaced the use of global max_cpus variable
with a machine property, but introduced a unnecessary ifdef, as
this block is already in the 'not CONFIG_USER_ONLY' branch part:
86 #if defined(CONFIG_USER_ONLY)
87
...
106 #else /* !CONFIG_USER_ONLY */
107
...
292 static void do_ext_interrupt(CPUS390XState *env)
293 {
...
313 #ifndef CONFIG_USER_ONLY
314 MachineState *ms = MACHINE(qdev_get_machine());
315 unsigned int max_cpus = ms->smp.max_cpus;
316 #endif
To ease code review, remove the duplicated preprocessor macro,
and move the declarations at the beginning of the statement.
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200121110349.25842-6-philmd@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Convert all targets to use cpu_class_set_parent_reset() with the following
coccinelle script:
@@
type CPUParentClass;
CPUParentClass *pcc;
CPUClass *cc;
identifier parent_fn;
identifier child_fn;
@@
+cpu_class_set_parent_reset(cc, child_fn, &pcc->parent_fn);
-pcc->parent_fn = cc->reset;
...
-cc->reset = child_fn;
Signed-off-by: Greg Kurz <groug@kaod.org>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Acked-by: David Hildenbrand <david@redhat.com>
Message-Id: <157650847817.354886.7047137349018460524.stgit@bahia.lan>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
We currently search both the root and the tcg/ directories for tcg
files:
$ git grep '#include "tcg/' | wc -l
28
$ git grep '#include "tcg[^/]' | wc -l
94
To simplify the preprocessor search path, unify by expliciting the
tcg/ directory.
Patch created mechanically by running:
$ for x in \
tcg.h tcg-mo.h tcg-op.h tcg-opc.h \
tcg-op-gvec.h tcg-gvec-desc.h; do \
sed -i "s,#include \"$x\",#include \"tcg/$x\"," \
$(git grep -l "#include \"$x\""); \
done
Acked-by: David Gibson <david@gibson.dropbear.id.au> (ppc parts)
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200101112303.20724-2-philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
The generated functions aside from *_real are unused.
The *_real functions have a couple of users in mem_helper.c;
use *_mmuidx_ra instead, with MMU_REAL_IDX.
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
v2: Use *_mmuidx_ra directly, without intermediate macros.
Code movement in an upcoming patch will show that this file
was implicitly depending on tcg.h being included indirectly.
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
We need to actually fetch the cpu mask and set it. As we invert the
short psw indication in the mask, SIE will report a specification
exception, if it wasn't present in the reset psw.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20191129142025.21453-2-frankja@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
These are trivially done by performing a memory operation
with the correct mmu_idx. The only tricky part is using
get_address directly in order to get the address wrapped;
we cannot use la2 because of the format.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20191211203614.15611-3-richard.henderson@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Split the PER handling for store-to-real-address into its
own helper function, conditionally called when PER is
enabled, just as we do for per_branch and per_ifetch.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20191211203614.15611-2-richard.henderson@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
The KVMState struct is opaque, so provide accessors for the fields
that will be moved from current_machine to the accelerator. For now
they just forward to the machine object, but this will change.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Similar to CPU and machine classes, "-accel" class names are mangled,
so we have to first get a class via accel_find and then instantiate it.
Provide a new function to instantiate a class without going through
object_class_get_name, and use it for CPUs and machines already.
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
We neglected to clean up pending interrupts and emergency signals;
fix that.
Message-Id: <20191206135404.16051-1-cohuck@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
qmp_query_cpu_definitions() passes @errp to get_max_cpu_model(), then
frees any error it gets back. This effectively ignores errors.
Dereferencing @errp is wrong; see the big comment in error.h. Passing
@errp is also wrong, because it works only as long as @errp is neither
@error_fatal nor @error_abort. Introduced in commit 38cba1f4d8
"s390x: return unavailable features via query-cpu-definitions".
No caller actually passes such @errp values.
Fix anyway: simply pass NULL to get_max_cpu_model().
Cc: David Hildenbrand <david@redhat.com>
Cc: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20191204093625.14836-16-armbru@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
cpu_model_from_info() is a helper for qmp_query_cpu_model_expansion(),
qmp_query_cpu_model_comparison(), qmp_query_cpu_model_baseline(). It
dereferences @errp when the visitor or the QOM setter fails. That's
wrong; see the big comment in error.h. Introduced in commit
137974cea3 's390x/cpumodel: implement QMP interface
"query-cpu-model-expansion"'.
Its three callers have the same issue. Introduced in commit
4e82ef0502 's390x/cpumodel: implement QMP interface
"query-cpu-model-comparison"' and commit f1a47d08ef 's390x/cpumodel:
implement QMP interface "query-cpu-model-baseline"'.
No caller actually passes null.
Fix anyway: splice in a local Error *err, and error_propagate().
Cc: David Hildenbrand <david@redhat.com>
Cc: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20191204093625.14836-15-armbru@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
get_max_cpu_model() dereferences @errp when
kvm_s390_get_host_cpu_model() fails, apply_cpu_model() dereferences it
when kvm_s390_apply_cpu_model() fails, and s390_realize_cpu_model()
dereferences it when get_max_cpu_model() or check_compatibility()
fail. That's wrong; see the big comment in error.h. All three
introduced in commit 80560137cf "s390x/cpumodel: check and apply the
CPU model".
No caller actually passes null.
Fix anyway: splice in a local Error *err, and error_propagate().
Cc: David Hildenbrand <david@redhat.com>
Cc: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20191204093625.14836-14-armbru@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
s390x-cpu property setters set_feature() and set_feature_group()
dereference @errp when the visitor fails. That's wrong; see the big
comment in error.h. Introduced in commit 0754f60429 "s390x/cpumodel:
expose features and feature groups as properties".
No caller actually passes null.
Fix anyway: splice in a local Error *err, and error_propagate().
Cc: David Hildenbrand <david@redhat.com>
Cc: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20191204093625.14836-13-armbru@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
As it turns out we need to clear the ri controls and PSW enablement
bit to be architecture compliant.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-Id: <20191203132813.2734-4-frankja@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
It defaults to returning 0 anyway and that return value is not
necessary, as 0 is also the default rc that the caller would return.
While doing that we can simplify the logic a bit and return early if
we inject a PGM exception.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20191129091713.4582-1-frankja@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Let's improve readability by:
* Using constants for the subcodes
* Moving parameter checking into a function
* Removing subcode > 6 check as the default case catches that
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20191127175046.4911-6-frankja@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Let's also move the clear reset function into the reset handler.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Message-Id: <20191127175046.4911-5-frankja@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Let's move the intial reset into the reset handler and cleanup
afterwards.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20191128083723.11937-1-frankja@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Let's start moving the cpu reset functions into a single function with
a switch/case, so we can later use fallthroughs and share more code
between resets.
This patch introduces the reset function by renaming cpu_reset().
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20191127175046.4911-3-frankja@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
We have to set the default model of all machine classes, not just for
the active one. Otherwise, "query-machines" will indicate the wrong
CPU model ("qemu-s390x-cpu" instead of "host-s390x-cpu") as
"default-cpu-type".
Doing a
{"execute":"query-machines"}
under KVM now results in
{"return": [
{
"hotpluggable-cpus": true,
"name": "s390-ccw-virtio-4.0",
"numa-mem-supported": false,
"default-cpu-type": "host-s390x-cpu",
"cpu-max": 248,
"deprecated": false},
{
"hotpluggable-cpus": true,
"name": "s390-ccw-virtio-2.7",
"numa-mem-supported": false,
"default-cpu-type": "host-s390x-cpu",
"cpu-max": 248,
"deprecated": false
} ...
Libvirt probes all machines via "-machine none,accel=kvm:tcg" and will
currently see the wrong CPU model under KVM.
Reported-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Fixes: b6805e127c ("s390x: use generic cpu_model parsing")
Cc: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20191021100515.6978-1-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
The numbers are unsigned, the computation is wrong. "Each operand is
treated as an unsigned binary integer".
Let's implement as given in the PoP:
"A subtraction is performed by adding the contents of the second operand
with the bitwise complement of the third operand along with a borrow
indication from the rightmost bit of the fourth operand."
Reuse gen_accc2_i64().
Fixes: bc725e6515 ("s390x/tcg: Implement VECTOR SUBTRACT WITH BORROW COMPUTE BORROW INDICATION")
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20191021085715.3797-7-david@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Testing this, there seems to be something messed up. We are dealing with
unsigned numbers. "Each operand is treated as an unsigned binary integer."
Let's just implement as written in the PoP:
"A subtraction is performed by adding the contents of
the second operand with the bitwise complement of
the third operand along with a borrow indication from
the rightmost bit position of the fourth operand and
the result is placed in the first operand."
We can reuse gen_ac2_i64().
Fixes: 48390a7c27 ("s390x/tcg: Implement VECTOR SUBTRACT WITH BORROW INDICATION")
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20191021085715.3797-6-david@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Looks like my idea of what a "borrow" is was wrong. The PoP says:
"If the resulting subtraction results in a carry out of bit zero, a value
of one is placed in the corresponding element of the first operand;
otherwise, a value of zero is placed in the corresponding element"
As clarified by Richard, all we have to do is invert the result.
Fixes: 1ee2d7ba72 ("s390x/tcg: Implement VECTOR SUBTRACT COMPUTE BORROW INDICATION")
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20191021085715.3797-5-david@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
We forgot to propagate the highest bit accross the high doubleword in
two cases (shift >=64).
Fixes: 5f724887e3 ("s390x/tcg: Implement VECTOR SHIFT RIGHT ARITHMETIC")
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20191021085715.3797-4-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
We missed that we always read a "double-wide even-odd element
pair of the fourth operand". Fix it in all four variants.
Fixes: 1b430aec41 ("s390x/tcg: Implement VECTOR MULTIPLY AND ADD *")
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20191021085715.3797-3-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
We have to read from odd offsets.
Fixes: 2bf3ee38f1 ("s390x/tcg: Implement VECTOR MULTIPLY *")
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20191021085715.3797-2-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
No need to double-check if we have a write.
Found by Coverity (CID: 1406404).
Fixes: 31b5941906 ("target/s390x: Return exception from mmu_translate_real")
Cc: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20191017121922.18840-1-david@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Beata Michalska noticed this missing visit_free() while reviewing
arm's implementation of qmp_query_cpu_model_expansion(), which is
modeled off this s390x implementation.
Signed-off-by: Andrew Jones <drjones@redhat.com>
Message-Id: <20191016145434.7007-1-drjones@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
MVCL is interruptible and we should check for interrupts and process
them after writing back the variables to the registers. Let's check
for any exit requests and exit to the main loop. Introduce a new helper
function for that: cpu_loop_exit_requested().
When booting Fedora 30, I can see a handful of these exits and it seems
to work reliable. Also, Richard explained why this works correctly even
when MVCL is called via EXECUTE:
(1) TB with EXECUTE runs, at address Ae
- env->psw_addr stored with Ae.
- helper_ex() runs, memory address Am computed
from D2a(X2a,B2a) or from psw.addr+RI2.
- env->ex_value stored with memory value modified by R1a
(2) TB of executee runs,
- env->ex_value stored with 0.
- helper_mvcl() runs, using and updating R1b, R1b+1, R2b, R2b+1.
(3a) helper_mvcl() completes,
- TB of executee continues, psw.addr += ilen.
- Next instruction is the one following EXECUTE.
(3b) helper_mvcl() exits to main loop,
- cpu_loop_exit_restore() unwinds psw.addr = Ae.
- Next instruction is the EXECUTE itself...
- goto 1.
As the PoP mentiones that an interruptible instruction called via EXECUTE
should avoid modifying storage/registers that are used by EXECUTE itself,
it is fine to retrigger EXECUTE.
Cc: Alex Bennée <alex.bennee@linaro.org>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
This setting is no longer used.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20191001171614.8405-19-richard.henderson@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
All but one caller passes ILEN_UNWIND, which is not stored.
For the one use case in s390_cpu_tlb_fill, set int_pgm_ilen
directly, simply to avoid the assert within do_program_interrupt.
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20191001171614.8405-18-richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
The single caller passes ILEN_UNWIND; pass that along to
trigger_pgm_exception directly.
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20191001171614.8405-17-richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
This setting is no longer used.
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20191001171614.8405-16-richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
