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2018-02-09s390x/flic: cache the common flic class in a central functionDavid Hildenbrand1-3/+3
This avoids tons of conversions when handling interrupts. Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20180129125623.21729-19-david@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-02-09s390x/tcg: cache the qemu flic in a central functionDavid Hildenbrand1-3/+3
This avoids tons of conversions when handling interrupts. Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20180129125623.21729-17-david@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-02-09s390x/flic: make floating interrupts on TCG actually floatingDavid Hildenbrand1-46/+6
Move floating interrupt handling into the flic. Floating interrupts will now be considered by all CPUs, not just CPU #0. While at it, convert I/O interrupts to use a list and make sure we properly consider I/O sub-classes in s390_cpu_has_io_int(). Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20180129125623.21729-9-david@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-02-09s390x/flic: factor out injection of floating interruptsDavid Hildenbrand1-25/+17
Let the flic device handle it internally. This will allow us to later on store floating interrupts in the flic for the TCG case. This now also simplifies kvm.c. All that's left is the fallback interface for floating interrupts, which is now triggered directly via the flic in case anything goes wrong. Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20180129125623.21729-6-david@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-02-09s390x/tcg: simplify machine check handlingDavid Hildenbrand1-11/+7
We currently only support CRW machine checks. This is a preparation for real floating interrupt support. Get rid of the queue and handle it via the bit INTERRUPT_MCHK. We don't rename it for now, as it will be soon gone (when moving crw machine checks into the flic). Please note that this is the same way also KVM handles it: only one instance of a machine check can be pending at a time. So no need for a queue. While at it, make sure we try to deliver only if env->cregs[14] actually indicates that CRWs are accepted. Drop two unused defines on the way (we already have PSW_MASK_...). Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20180129125623.21729-5-david@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2017-12-14s390x/tcg: drop program_interrupt()David Hildenbrand1-17/+5
All users are gone, we can finally drop it and make sure that all new program interrupt injections are reminded of the retaddr - as they have to use s390_program_interrupt() now. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20171130162744.25442-16-david@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2017-12-14s390x/tcg: introduce and use s390_program_interrupt()David Hildenbrand1-0/+13
Allows to easily convert more callers of program_interrupt() and to easily introduce new exceptions without forgetting about the cpu state reset. Use s390_program_interrupt() in places where we already had the same pattern. We will later get rid of program_interrupt(). RA != 0 checks are already done behind the scenes. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20171130162744.25442-2-david@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2017-10-20s390x/tcg: implement STOP and RESET interrupts for TCGDavid Hildenbrand1-5/+27
Implement them like KVM implements/handles them. Both can only be triggered via SIGP instructions. RESET has (almost) the lowest priority if the CPU is running, and the highest if the CPU is STOPPED. This is handled in SIGP code already. On delivery, we only have to care about the "CPU running" scenario. STOP is defined to be delivered after all other interrupts have been delivered. Therefore it has the actual lowest priority. As both can wake up a CPU if sleeping, indicate them correctly to external code (e.g. cpu_has_work()). Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20170928203708.9376-25-david@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2017-10-20s390x/kvm: generalize SIGP stop and restart interrupt injectionDavid Hildenbrand1-0/+20
Preparation for factoring it out into !kvm code. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20170928203708.9376-13-david@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2017-10-20s390x/tcg: take care of external interrupt subclassesDavid Hildenbrand1-1/+31
We can now let go of INTERRUPT_EXT. When cr0 changes, we have to revalidate if we now have a pending external interrupt, just like when the PSW (or SYSTEM MASK only) changes. Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20170928203708.9376-6-david@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2017-10-20s390x/tcg: rework checking for deliverable interruptsDavid Hildenbrand1-0/+46
Currently, enabling/disabling of interrupts is not really supported. Let's improve interrupt handling code by explicitly checking for deliverable interrupts only. This is the first step. Checking for external interrupt subclasses will be done next. Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20170928203708.9376-5-david@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2017-10-20s390x/tcg: injection of emergency signals and external callsDavid Hildenbrand1-0/+26
Preparation for new TCG SIGP code. Especially also prepare for indicating that another external call is already pending. Take care of interrupt priority. Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20170928203708.9376-4-david@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2017-10-20s390x/tcg: cleanup service interrupt injectionDavid Hildenbrand1-14/+4
There are still some leftovers from old virtio interrupts in there. Most importantly, we don't have to queue service interrupts anymore. Just like KVM, we can simply multiplex the SCLP service interrupts and avoid the queue. Also, now only valid parameters/cpu_addr will be stored on service interrupts. Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20170928203708.9376-3-david@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2017-10-20s390x/tcg: turn INTERRUPT_EXT into a maskDavid Hildenbrand1-1/+17
External interrupts are currently all handled like floating external interrupts, they are queued. Let's prepare for a split of floating and local interrupts by turning INTERRUPT_EXT into a mask. While we can have various floating external interrupts of one kind, there is usually only one (or a fixed number) of the local external interrupts. So turn INTERRUPT_EXT into a mask and properly indicate the kind of external interrupt. Floating interrupts will have to moved out of one CPU instance later once we have SMP support. The only floating external interrupts used right now are SERVICE interrupts, so let's use that name. Following patches will clean up SERVICE interrupt injection. This get's rid of the ugly special handling for cpu timer and clock comparator interrupts. And we really only store the parameters as defined by the PoP. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20170928203708.9376-2-david@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2017-08-30s390x/kvm: move KVM declarations and stubs to separate filesDavid Hildenbrand1-0/+1
Let's do it just like the other architectures. Introduce kvm-stub.c for stubs and kvm_s390x.h for the declarations. Change license to GPL2+ and keep copyright notice. As we are dropping the sysemu/kvm.h include from cpu.h, fix up includes. Suggested-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20170818114353.13455-18-david@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2017-08-30target/s390x: introduce internal.hDavid Hildenbrand1-0/+1
cpu.h should only contain what really has to be accessed outside of target/s390x/. Add internal.h which can only be used inside target/s390x/. Move everything that isn't fast enough to run away and restructure it right away. We'll move all kvm_* stuff later. Minor style fixes to avoid checkpatch warning to: - struct Lowcore: "{" goes into same line as typedef - struct LowCore: add spaces around "-" in array length calculations - time2tod() and tod2time(): move "{" to separate line - get_per_atmid(): add space between ")" and "?". Move cases by one char. - get_per_atmid(): drop extra paremthesis around (1 << 6) Change license of new file to GPL2+ and keep copyright notice. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20170818114353.13455-15-david@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2017-07-25target/s390x: Rework program_interrupt() and related functionsThomas Huth1-0/+39
misc_helper.c won't be compiled with --disable-tcg anymore, but we still need the program_interrupt() function in that case. Move it to interrupt.c instead, and refactor it to re-use the code from trigger_pgm_exception() (for TCG) and enter_pgmcheck() (for KVM, which now got renamed to kvm_s390_program_interrupt() for clarity). Signed-off-by: Thomas Huth <thuth@redhat.com> Message-Id: <1500886370-14572-4-git-send-email-thuth@redhat.com> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2016-12-20Move target-* CPU file into a target/ folderThomas Huth1-0/+120
We've currently got 18 architectures in QEMU, and thus 18 target-xxx folders in the root folder of the QEMU source tree. More architectures (e.g. RISC-V, AVR) are likely to be included soon, too, so the main folder of the QEMU sources slowly gets quite overcrowded with the target-xxx folders. To disburden the main folder a little bit, let's move the target-xxx folders into a dedicated target/ folder, so that target-xxx/ simply becomes target/xxx/ instead. Acked-by: Laurent Vivier <laurent@vivier.eu> [m68k part] Acked-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> [tricore part] Acked-by: Michael Walle <michael@walle.cc> [lm32 part] Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> [s390x part] Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> [s390x part] Acked-by: Eduardo Habkost <ehabkost@redhat.com> [i386 part] Acked-by: Artyom Tarasenko <atar4qemu@gmail.com> [sparc part] Acked-by: Richard Henderson <rth@twiddle.net> [alpha part] Acked-by: Max Filippov <jcmvbkbc@gmail.com> [xtensa part] Reviewed-by: David Gibson <david@gibson.dropbear.id.au> [ppc part] Acked-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> [cris&microblaze part] Acked-by: Guan Xuetao <gxt@mprc.pku.edu.cn> [unicore32 part] Signed-off-by: Thomas Huth <thuth@redhat.com>
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