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2013-02-16cpu: Add CPUArchState pointer to CPUStateAndreas Färber1-0/+2
The target-specific ENV_GET_CPU() macros have allowed us to navigate from CPUArchState to CPUState. The reverse direction was not supported. Avoid introducing CPU_GET_ENV() macros by initializing an untyped pointer that is initialized in derived instance_init functions. The field may not be called "env" due to it being poisoned. Acked-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-02-16target-s390x: Move TCG initialization to S390CPU initfnAndreas Färber2-7/+6
Ensures that a QOM-created S390CPU is usable. Acked-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-02-16target-s390x: Introduce QOM realizefn for S390CPUAndreas Färber3-3/+19
Introduce realizefn and set realized = true in cpu_s390x_init(). Defer CPU reset from initfn to realizefn. Acked-by: Richard Henderson <rth@twiddle.net> [AF: Invoke parent's realizefn] Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-02-13s390: Fix handling of iscs.Cornelia Huck3-2/+8
There are two ways to express an interruption subclass: - As a bitmask, as used in cr6. - As a number, as used in the I/O interruption word. Unfortunately, we have treated to I/O interruption word as if it contained the bitmask as well, which went unnoticed so far as - (queued-for-next) kvm made the same mistake, and - Linux guest kernels don't check the isc value in the I/O interruption word for subchannel interrupts. Make sure that we treat the I/O interruption word correctly. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-02-13s390: Keep I/O interrupts enabled for all iscs.Cornelia Huck1-19/+21
do_io_interrupt() would stop scanning further iscs if it found an I/O interrupt it could inject. This might cause the pending interrupt indication for I/O interrupts to be reset although there might be queued I/O interrupts for subsequent iscs. Fix this by reordering the logic: Inject the I/O interrupt immediately and continue searching all iscs for queued interrupts. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-02-04target-s390x: Fix wrong comparison in interrupt handlingStefan Weil1-1/+1
gcc with -Wextra complains about an ordered pointer comparison: target-s390x/helper.c:660:27: warning: ordered comparison of pointer with integer zero [-Wextra] Obviously the index was missing in the code. Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-04s390x: silence warning from GCC on uninitialized valuesAnthony Liguori1-1/+1
As best I can tell, this is a false positive. [aliguori@ccnode4 qemu-s390]$ make CC s390x-softmmu/target-s390x/helper.o /home/aliguori/git/qemu/target-s390x/helper.c: In function ‘do_interrupt’: /home/aliguori/git/qemu/target-s390x/helper.c:673:17: error: ‘addr’ may be used uninitialized in this function [-Werror=maybe-uninitialized] /home/aliguori/git/qemu/target-s390x/helper.c:620:20: note: ‘addr’ was declared here /home/aliguori/git/qemu/target-s390x/helper.c:673:17: error: ‘mask’ may be used uninitialized in this function [-Werror=maybe-uninitialized] /home/aliguori/git/qemu/target-s390x/helper.c:620:14: note: ‘mask’ was declared here cc1: all warnings being treated as errors make[1]: *** [target-s390x/helper.o] Error 1 make: *** [subdir-s390x-softmmu] Error 2 Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Cc: Stefan Weil <sw@weilnetz.de> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-01Merge remote-tracking branch 'agraf/s390-for-upstream' into stagingAnthony Liguori5-26/+31
# By Andreas Färber # Via Alexander Graf * agraf/s390-for-upstream: target-s390x: Pass S390CPU to s390_{add, del}_running_cpu() target-s390x: Clean up cpu_inject_*() signatures target-s390x: Fix debug output target-s390x: Fix debug output (continued)
2013-02-01target-s390x: Pass S390CPU to s390_{add, del}_running_cpu()Andreas Färber4-15/+13
This prepares for moving the halted field to CPUState. Most call sites can already supply S390CPU, for some env becomes unused. Signed-off-by: Andreas Färber <afaerber@suse.de> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-02-01target-s390x: Clean up cpu_inject_*() signaturesAndreas Färber3-8/+15
Despite cautioning that S390CPU is needed for upcoming CPUState refactorings, commit 5d69c547d947798cba92d836d06f6e017ba2b19d (s390: I/O interrupt and machine check injection.) added functions cpu_inject_io() and cpu_inject_crw_mchk() with CPUS390XState argument, claiming consistency with cpu_inject_ext(). This complicates making cpu_interrupt() take a CPUState even more and it required to pass &cpu->env from some S390CPU-aware call sites already, creating inconsistency elsewhere. Address that. This also eliminates the need for CPUS390XState in s390_virtio_irq(). Signed-off-by: Andreas Färber <afaerber@suse.de> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-02-01target-s390x: Fix debug outputAndreas Färber1-1/+1
Commit 71e470886fb6092504503a5fe41092ace71c096c (target-s390x: fix style) renamed the cpu_s390x_handle_mmu_fault() argument from _vaddr to orig_vaddr. Update the debug output code. Signed-off-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-02-01target-s390x: Fix debug output (continued)Andreas Färber1-2/+2
Since its introduction in d5a439645a5a70fed5431318c3bce9dc2caa950f (s390x: helper functions for system emulation) the variable name was raddr. Fix this. Signed-off-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-02-01target-s390x: Mark as unmigratableAndreas Färber3-32/+10
CPU_SAVE_VERSION was undefined, so "cpu_common" VMState and cpu_{save,load}() were not registered. They were no-ops. Therefore there is no backwards compatibility to keep, so we can mark S390CPU as unmigratable at device level. Signed-off-by: Andreas Färber <afaerber@suse.de> Acked-by: Alexander Graf <agraf@suse.de> Reviewed-by: Juan Quintela <quintela@redhat.com>
2013-01-29s390: Use s390_cpu_physical_memory_map for tpi.Cornelia Huck3-7/+23
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>
2013-01-29s390: Wire up channel I/O in kvm.Cornelia Huck2-13/+237
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>
2013-01-29s390: Virtual channel subsystem support.Cornelia Huck1-0/+62
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>
2013-01-29s390: Add channel I/O instructions.Cornelia Huck3-0/+832
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>
2013-01-29s390: I/O interrupt and machine check injection.Cornelia Huck2-1/+209
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>
2013-01-29s390: Channel I/O basic definitions.Cornelia Huck4-1/+245
Basic channel I/O structures and helper function. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2013-01-29s390: Add mapping helper functions.Cornelia Huck2-0/+29
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>
2013-01-29s390: Lowcore mapping helper.Cornelia Huck1-9/+25
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>
2013-01-27kvm: Create kvm_arch_vcpu_id() functionEduardo Habkost1-0/+5
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>
2013-01-18s390: Add a hypercall registration interface.Cornelia Huck3-3/+3
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>
2013-01-18target-s390x: Unregister reset callback on finalizationAndreas Färber1-0/+10
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>
2013-01-18s390x: fix indentationAlexander Graf1-5/+5
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>
2013-01-18s390: Add CPU reset handlerJens Freimann2-3/+41
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>
2013-01-18s390x: Remove inline function ebcdic_put and related data from cpu.hStefan Weil2-81/+81
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>
2013-01-18S390: Enable -cpu help and QMP query-cpu-definitionsViktor Mihajlovski2-0/+29
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>
2013-01-18s390: new contributions GPLv2 or laterChristian Borntraeger2-2/+9
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>
2013-01-15cpu: Move cpu_index field to CPUStateAndreas Färber1-1/+1
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>
2013-01-05target-s390: Use noreturn for exception and load_pswRichard Henderson1-2/+2
Both always exit the cpu loop. Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-01-05target-s390: Use TCG_CALL_NO_WG for misc helpersRichard Henderson1-1/+1
Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-01-05target-s390: Use TCG_CALL_NO_WG for integer helpersRichard Henderson1-4/+4
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>
2013-01-05target-s390: Use TCG_CALL_NO_WG for floating-point helpersRichard Henderson1-39/+39
None of them read or write tcg registers, but most can raise fp exceptions. Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-01-05target-s390: Use TCG_CALL_NO_WG for memory helpersRichard Henderson1-15/+15
Those that do not read or write tcg registers, but can raise exceptions via memory faults. Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-01-05target-s390: Perform COMPARE AND SWAP inlineRichard Henderson4-96/+124
Still no proper solution for CONFIG_USER_ONLY, but the system version is significantly better. Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-01-05target-s390: Optimize get_addressRichard Henderson1-26/+18
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>
2013-01-05target-s390: Optimize ADDC/SUBBRichard Henderson1-19/+37
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>
2013-01-05target-s390: Optimize ADDU/SUBU CC testingRichard Henderson1-0/+68
We can easily generate some masks for logical add/subtract inline. Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-01-05target-s390: Tidy comparisonsRichard Henderson1-22/+17
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>
2013-01-05target-s390: Optmize emitting discardsRichard Henderson1-6/+24
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>
2013-01-05target-s390: Optimize XCRichard Henderson2-4/+48
Notice XC with same address and convert that to store of zero. Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-01-05target-s390: Fix cpu_clone_regsRichard Henderson1-1/+1
R2 is the syscall return register, not R0. Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-01-05target-s390: Implement LOAD/SET FP AND SIGNALRichard Henderson4-8/+40
Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-01-05target-s390: Implement SET ROUNDING MODERichard Henderson2-0/+44
Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-01-05target-s390: Use uint64_to_float128Richard Henderson1-2/+1
Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-01-05target-s390: Implement LCDFRRichard Henderson1-0/+1
Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-01-05target-s390: Check insn operand specificationsRichard Henderson1-36/+159
Removes all the fixmes for even register numbers, etc. Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-01-05target-s390: Implement CPSDRRichard Henderson2-0/+19
Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-01-05target-s390: Implement POPCNTRichard Henderson4-0/+22
Signed-off-by: Richard Henderson <rth@twiddle.net>
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