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2015-06-17target-s390x: PER: add Breaking-Event-Address registerAurelien Jarno
This patch adds support for PER Breaking-Event-Address register. Like real hardware, it save the current PSW address when the PSW address is changed by an instruction. We have to take care of optimizations QEMU does, a branch to the next instruction is still a branch. This register is copied to low core memory when a program exception happens. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Alexander Graf <agraf@suse.de>
2015-06-17target-s390x: PER storage-alteration event supportAurelien Jarno
For the PER storage-alteration event we can use the QEMU watchpoint infrastructure. When PER is enabled or PER control register changed we enable the corresponding watchpoints. When a watchpoint arises we can save the event. Unfortunately the current code does not provide the address space used to trigger the watchpoint. For now we assume it comes from the default ASC. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Alexander Graf <agraf@suse.de>
2015-06-17target-s390x: basic PER event handlingAurelien Jarno
This patch add basic support to generate PER exceptions. It adds two fields to the cpu structure to record for the PER address and PER code & ATMID values. When an exception is triggered and a PER event is pending, the two PER values are copied to the lowcore area. At the end of an instruction, an helper is checking for a possible pending PER event and triggers an exception in that case. For that to work with branches, we need to disable TB chaining when PER is activated. Fortunately it's already in the TB flags. Finally in case of a SERVICE CALL exception, we need to trigger the PER exception immediately after. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Alexander Graf <agraf@suse.de>
2015-06-05target-s390x: support non current ASC in s390_cpu_handle_mmu_faultAurelien Jarno
s390_cpu_handle_mmu_fault currently looks at the current ASC mode defined in PSW mask instead of the MMU index. This prevent emulating easily instructions using a specific ASC mode. Fix that by using the MMU index converted back to ASC using the just added cpu_mmu_idx_to_asc function. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Alexander Graf <agraf@suse.de>
2015-05-27s390x: Common access to floating point registersEric Farman
Provide a routine to access the correct floating point register, to simplify future expansion. Suggested-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Eric Farman <farman@linux.vnet.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2015-04-30s390x/mmu: Use access type definitions instead of magic valuesThomas Huth
Since there are now proper definitions for the MMU access type, let's use them in the s390x MMU code, too, instead of the hard-to-understand magic values. Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2015-03-10s390x: add function to deliver restart irqsDavid Hildenbrand
This patch adds a helper function to deliver restart irqs. To be able to be used by kvm, the psw load/store methods have to perform special cc-code handling only when running with tcg. Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Message-Id: <1424783731-43426-9-git-send-email-jfrei@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2015-02-18s390x/helper: Remove s390_cpu_physical_memory_mapThomas Huth
The function is now not used anymore, so it can be removed safely. Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2015-02-18s390x/mmu: Skip exceptions properly when translating addresses for debugThomas Huth
When a fault occurs during the MMU lookup in s390_cpu_get_phys_page_debug(), the trigger_page_fault() function writes the translation exception code into the lowcore - something you would not expect during a memory access by the debugger. Ease this problem by adding an additional parameter to mmu_translate() which can be used to specify whether a program check and the translation exception code should be injected or not. Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2015-02-18s390x/mmu: Move mmu_translate() and friends to separate fileThomas Huth
helper.c is quite overcrowded already, so let's move the MMU translation to a separate file instead (like it has been done with the other targets already). Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Acked-by: Alexander Graf <agraf@suse.de> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-12-16qemu-log: add log category for MMU infoAntony Pavlov
Running barebox on qemu-system-mips* with '-d unimp' overloads stderr by very very many mips_cpu_handle_mmu_fault() messages: mips_cpu_handle_mmu_fault address=b80003fd ret 0 physical 00000000180003fd prot 3 mips_cpu_handle_mmu_fault address=a0800884 ret 0 physical 0000000000800884 prot 3 mips_cpu_handle_mmu_fault pc a080cd80 ad b80003fd rw 0 mmu_idx 0 So it's very difficult to find LOG_UNIMP message. The mips_cpu_handle_mmu_fault() messages appear on enabling ANY logging! It's not very handy. Adding separate log category for *_cpu_handle_mmu_fault() logging fixes the problem. Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Acked-by: Alexander Graf <agraf@suse.de> Reviewed-by: Richard Henderson <rth@twiddle.net> Message-id: 1418489298-1184-1-git-send-email-antonynpavlov@gmail.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-12-10target-s390x: fix possible out of bounds readzhanghailiang
Array index starts at 0, so the valid index of ext_queue array, io_queue array, mchk_queue array should be MAX_EXT_QUEUE - 1, MAX_IO_QUEUE - 1, MAX_MCHK_QUEUE - 1. The original checks missed the invalid bound value, which will lead possible out of bounds read in the follow codes. Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-10-10s390x/kvm: proper use of the cpu states OPERATING and STOPPEDDavid Hildenbrand
This patch makes sure that halting a cpu and stopping a cpu are two different things. Stopping a cpu will also set the cpu halted - this is needed for common infrastructure to work (note that the stop and stopped flag cannot be used for our purpose because they are already used by other mechanisms). A cpu can be halted ("waiting") when it is operating. If interrupts are disabled, this is called a "disabled wait", as it can't be woken up anymore. A stopped cpu is treated like a "disabled wait" cpu, but in order to prepare for a proper cpu state synchronization with the kvm part, we need to track the real logical state of a cpu. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> CC: Andreas Faerber <afaerber@suse.de> Tested-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-09-25target-s390x: Use cpu_exec_interrupt qom hookRichard Henderson
Cc: Alexander Graf <agraf@suse.de> Signed-off-by: Richard Henderson <rth@twiddle.net> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 1410626734-3804-9-git-send-email-rth@twiddle.net Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-06-05softmmu: introduce cpu_ldst.hPaolo Bonzini
This will collect all load and store helpers soon. For now it is just a replacement for softmmu_exec.h, which this patch stops including directly, but we also include it where this will be necessary in order to simplify the next patch. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-05-20s390x/kvm: hw debugging support via guest PER facilityDavid Hildenbrand
This patch makes use of the hw debugging support in kvm (provided by the guest's PER facility) on s390. It enables the following features, available using the gdbserver: - single-stepping - hw breakpoints - hw watchpoints Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-05-07s390x/helper: Added format control bit to MMU translationThomas Huth
With the EDAT-1 facility, the MMU translation can stop at the segment table already, pointing to a 1 MB block. And while we're at it, move the page table entry handling to a separate function, too, as suggested by Alexander Graf. Acked-by: Alexander Graf <agraf@suse.de> Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-05-07s390x/helper: Fixed real-to-absolute address translationThomas Huth
The real-to-absolute address translation in mmu_translate() was missing the second part for translating the page at the prefix address back to the 0 page. And while we're at it, also moved the code into a separate helper function since this might come in handy for other parts of the code, too. Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-03-13cputlb: Change tlb_set_page() argument to CPUStateAndreas Färber
Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-03-13exec: Change cpu_abort() argument to CPUStateAndreas Färber
Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-03-13cpu: Move exception_index field from CPU_COMMON to CPUStateAndreas Färber
Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-03-13cpu: Turn cpu_handle_mmu_fault() into a CPUClass hookAndreas Färber
Note that while such functions may exist both for *-user and softmmu, only *-user uses the CPUState hook, while softmmu reuses the prototype for calling it directly. Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-03-13target-s390x: Clean up ENV_GET_CPU() usageAndreas Färber
Commits f606604f1c10b60ef294f1b9b229426521a365e3, 2c17449b3022ca9623c4a7e2a504a4150ac4ad30 and 5ce5944dc0ffdc43c11b5cad11e526f699aabe4c added usages of ENV_GET_CPU() macro in target-specific code. Use s390_env_get_cpu() instead. Cc: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Cc: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-02-11exec: Make stq_*_phys input an AddressSpaceEdgar E. Iglesias
Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
2014-02-11exec: Make ldq/ldub_*_phys input an AddressSpaceEdgar E. Iglesias
Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
2013-10-07cpu: Drop cpu_model_str from CPU_COMMONAndreas Färber
Since this is only read in cpu_copy() and linux-user has a global cpu_model, drop the field from generic code. Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-07-23cpu: Turn cpu_get_phys_page_debug() into a CPUClass hookAndreas Färber
Change breakpoint_invalidate() argument to CPUState alongside. Since all targets now assign a softmmu-only field, we can drop helpers cpu_class_set_{do_unassigned_access,vmsd}() and device_class_set_vmsd(). Prepares for changing cpu_memory_rw_debug() argument to CPUState. Acked-by: Max Filippov <jcmvbkbc@gmail.com> (for xtensa) Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-03-12cpu: Replace do_interrupt() by CPUClass::do_interrupt methodAndreas Färber
This removes a global per-target function and thus takes us one step closer to compiling multiple targets into one executable. It will also allow to override the interrupt handling for certain CPU families. Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-03-12cpu: Pass CPUState to cpu_interrupt()Andreas Färber
Move it to qom/cpu.h to avoid issues with include order. Change pc_acpi_smi_interrupt() opaque to X86CPU. Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-03-12cpu: Move halted and interrupt_request fields to CPUStateAndreas Färber
Both fields are used in VMState, thus need to be moved together. Explicitly zero them on reset since they were located before breakpoints. Pass PowerPCCPU to kvmppc_handle_halt(). Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-02-16target-s390x: Move TCG initialization to S390CPU initfnAndreas Färber
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 Färber
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 Huck
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 Huck
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 Weil
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 Liguori
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>
2013-02-01target-s390x: Pass S390CPU to s390_{add, del}_running_cpu()Andreas Färber
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 Färber
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 Färber
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 Färber
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>
2013-01-29s390: I/O interrupt and machine check injection.Cornelia Huck
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: Add mapping helper functions.Cornelia Huck
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 Huck
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>
2013-01-05target-s390: Reorg exception handlingRichard Henderson
Make the user path more like the system path. Prepare for more kinds of runtime exceptions. Rename ILC to ILEN to make it clear that we want to pass around a full instruction length, rather than a "code" that happens to be stored one bit left in a larger field. Signed-off-by: Richard Henderson <rth@twiddle.net>
2013-01-05target-s390: Fix PSW_MASK handlingRichard Henderson
We were treating psw.mask as the 32-bit quantity it is in ESA mode. In particular, the CC field was at the wrong place. Signed-off-by: Richard Henderson <rth@twiddle.net>
2012-12-19softmmu: move include files to include/sysemu/Paolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19misc: move include files to include/qemu/Paolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19exec: move include files to include/exec/Paolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-23Rename target_phys_addr_t to hwaddrAvi Kivity
target_phys_addr_t is unwieldly, violates the C standard (_t suffixes are reserved) and its purpose doesn't match the name (most target_phys_addr_t addresses are not target specific). Replace it with a finger-friendly, standards conformant hwaddr. Outstanding patchsets can be fixed up with the command git rebase -i --exec 'find -name "*.[ch]" | xargs s/target_phys_addr_t/hwaddr/g' origin Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-09-27target-s390x: Use CPU_LOG_INTRichard Henderson
Three places in the interrupt code did we not honor the mask. Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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