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s390x/async_pf: Check for apf extension and enable pfault
S390 can also use async page faults, to enhance guest scheduling.In case of live migration we want to disable the feature and letall pending request finish.
Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>...
s390x/kvm: Fixed bad SIGP SET-ARCHITECTURE handler
The SET-ARCHITECTURE handler in QEMU caused a program interruption.This is wrong according to the "Principles of Operations" specification(since SIGP should never cause a program interrupt) and was likely only...
s390x/virtio-hcall: Specification exception for illegal subcodes
So far, the DIAG 500 hypervisor call was only setting -EINVAL inR2 when a guest tried to call this function with an illegal subcode.This patch now changes the behavior so that a specification exception...
s390x/sclp: Fixed the size of sccb and code parameter
The pointer to the SCCB should not be limited to 32 bits only.In contrast to this, the command word parameter is only 32 bits(the upper 32 bits should be ignored).
Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>...
s390x/kvm: cleanup partial register handling
The partial register handling (introduced with commits420840e58b85f7f4e5493dca3f273566f261090a and3474b679486caa8f6448bae974e131370f360c13 ) aimed to improve intercepthandling performance.
It made the code more complicated though. During development for life...
s390x/kvm: Fix diagnose handling.
The instruction intercept handler for diagnose used only the displacementwhen trying to calculate the function code. This is only correct for base0, however; we need to perform a complete base/displacement addresscalculation and use bits 48-63 as the function code....
s390x/kvm: Removed duplicated SIGP defines
The SIGP order defines are also available in cpu.h,so there is no need to re-define them in kvm.c.
Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>...
s390x/kvm: Removed s390_store_status stub
The SIGP order STORE STATUS AT ADDRESS will be handled inkernel space, so we do not need the stub in QEMU anymore.
Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>...
s390x/kvm: Fix coding style in handle_sigp()
To make scripts/checkpatch.pl happy for the following patches,the coding style in handle_sigp() has to be fixed first.
Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>...
s390x/kvm: Implemented SIGP START
This patch adds the missing START order to the SIGP instruction handler.
s390x/kvm: Simplified the calculation of the SIGP order code
We've already got a helper function for calculating thebase/displacement of RS formatted instructions, so we canget rid of the manual calculation of the SIGP order code.
s390x/kvm: Fixed condition code for unknown SIGP orders
If SIGP is called with an unknown order code, it has to return CC1instead of CC3 and set the "invalid order" bit in the return status.
exec: Fix prototype of phys_mem_set_alloc and related functions
phys_mem_alloc and its assigned values qemu_anon_ram_alloc andlegacy_s390_alloc must have identical argument lists.
legacy_s390_alloc uses the size parameter to call mmap, so size_t isgood enough for all of them....
s390/cpu: Make setcc() function available to other files
Moved the setcc() function to cpu.h so that it can be used by otherfiles, too. It now also does not modify the kvm state anymore sincethis gets updated during kvm_arch_put_registers() anyway.
s390/ioinst: Moved the CC setting to the IO instruction handlers
The IO instruction handlers now take care of setting the CC value ontheir own, so that the confusing return code magic in kvm_handle_css_inst()is not needed anymore.
s390/kvm: Add check for priviledged SCLP handler
The SCLP instruction is priviledged, so we should make sure thatwe generate an exception when it is called from the problem state.
Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
exec: Don't abort when we can't allocate guest memory
We abort() on memory allocation failure. abort() is appropriate forprogramming errors. Maybe most memory allocation failures areprogramming errors, maybe not. But guest memory allocation failureisn't, and aborting when the user asks for more memory than we can...
exec: Simplify the guest physical memory allocation hook
Make it a generic hook rather than a KVM hook. Less code andifdeffery.
Since the only user of the hook is old S390 KVM, there's hope we canget rid of it some day.
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>...
s390: wire up nmi command to raise a RESTART interrupt on S390
There is the 'nmi' command that is used to trigger a guest dump via kdump feature on x86.s390 uses RESTART interrupt to trigger kdump.So, this patch provides a mean to use 'nmi' command on s390 to raise RESTART interrupt....
s390/kvm: basic implementation of diagnose 308 subcode 6
Linux uses a check for subcode 6 to decide if other subcodes areavailable. Provide a minimal implementation for subcode 6, as wellas for subcode 5.
Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>...
s390x/kvm: Fix switch/case indentation for handle_diag
This alignes case statements to switch statements in the handle_diagfunction as mandated by coding style.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
s390x/kvm: Remove redundant return code
Removed the redundant return code statement from handle_instruction() - italways returned 0 and never reports any errors to its caller, since errorsfrom the sub-functions are already reported via program exceptions instead....
s390x/kvm: Reworked/fixed handling of cc3 in kvm_handle_css_inst()
Consolidated the setting of the condition code in kvm_handle_css_inst().For the (unhandled) instructions EQBS and SQBS, we have to returnan operation exception instead of cc3. Also removed the is_ioinst()...
s390x: Rename 'dprintf' to 'DPRINTF'
'dprintf' is the name of a POSIX standard function so we should not bestealing it for our debug macro. Rename to 'DPRINTF' (in line witha number of other source files.)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>...
target-s390x: Fix CPUState rework fallout
Commit f17ec444c3d39f76bcd8b71c2c05d5754bfe333eexec: Change cpu_memory_rw_debug() argument to CPUState
missed to update s390x KVM code, breaking the build.
Let's fix it up.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>...
target-s390x: Don't overuse ENV_GET_CPU()
Commit 3474b679486caa8f6448bae974e131370f360c13 (Utilize selectiveruntime reg sync for hot code paths) introduced two uses ofENV_GET_CPU() inside target-s390x/ KVM code. In one case we can use adirect CPU cast instead....
target-s390x: Change handle_{hypercall,diag}() argument to S390CPU
This allows to get rid of the last remaining ENV_GET_CPU() intarget-s390x/ by using CPU cast directly on the argument.
Cc: Jason J. Herne <jjherne@us.ibm.com>Signed-off-by: Andreas Färber <afaerber@suse.de>
virtio-ccw: fix build breakage on windows
event_notifier_get_fd() is not available on windows hosts. Fix this bymoving the calls to event_notifier_get_fd() to the kvm code.
Reported-by: Stefan Weil <sw@weilnetz.de>Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>...
kvm: Change cpu_synchronize_state() argument to CPUState
Change Monitor::mon_cpu to CPUState as well.
Reviewed-by: liguang <lig.fnst@cn.fujitsu.com>Acked-by: Paolo Bonzini <pbonzini@redhat.com>Signed-off-by: Andreas Färber <afaerber@suse.de>
virtio-ccw: Wire up ioeventfd.
On hosts that support ioeventfd, make use of it for host-to-guestnotifications via diagnose 500.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
KVM: S390: Add dummy kvm_arch_init_irq_routing()
The common KVM code insists on calling kvm_arch_init_irq_routing()as soon as it sees kernel header support for it (regardless of whetherQEMU supports it). Provide a dummy function to satisfy this.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>...
osdep, kvm: rename low-level RAM allocation functions
This is preparatory to the introduction of a separate freeing API.
Reported-by: Amos Kong <akong@redhat.com>Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>Reviewed-by: Amos Kong <akong@redhat.com>...
Wire up disabled wait a panicked event on s390
On s390 the disabled wait state indicates a state of attention.For example Linux uses that state after a panic. Letsput the system into panicked state.
An alternative implementation would be to statedisabled-wait <address> instead of pause in the action field....
Utilize selective runtime reg sync for hot code paths
Make use of new kvm_s390_get_registers_partial() for kvm_handle_css_inst() andhandle_hypercall() since they only need registers from the partial set and theyare called quite frequently.
Signed-off-by: Jason J. Herne <jjherne@us.ibm.com>...
Allow selective runtime register synchronization
We want to avoid expensive register synchronization IOCTL's on the hot path soa new kvm_s390_get_registers_partial() is introduced as a compliment tokvm_arch_get_registers(). The new function is called on the hot path, and...
s390: Fix cpu refactoring fallout.
Commit 259186a7 "cpu: Move halted and interrupt_request fields to CPUState" seems to have missed one instance in target-s390x/kvm.c:
/home/cohuck/git/qemu/target-s390x/kvm.c: In function ‘kvm_arch_process_async_events’:...
s390: simplify kvm cpu init
There is no special code right now and the reset ioctl is done lateron in the the reset handler anyway. Lets simplify the cpu init.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>Signed-off-by: Alexander Graf <agraf@suse.de>
target-s390x: Pass S390CPU to s390_{add, del}_running_cpu()
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>...
s390: Wire up channel I/O in kvm.
Trigger the code for our virtual css in case of instructionintercepts 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>
kvm: Create kvm_arch_vcpu_id() function
This will allow each architecture to define how the VCPU ID is set onthe 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>
s390: new contributions GPLv2 or later
IBMs s390 contributions were meant to to be gplv2 or later (sincewe were contributing to qemu). Several of the s390 specific fileslink to gpl code anyway, so lets clarify the licence statement fornew contributions for those files that we have touched multiple...
s390: Add CPU reset handler
Add a CPU reset handler to have all CPUs in a PoP compliantstate.
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>
s390x: fix indentation
In one of the last commits we accidently got 3-space indentation intothe 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>
s390: Add a hypercall registration interface.
Allow virtio machines to register for different diag500 functioncodes and convert s390-virtio to use it.
Merge branch 'master' of git://git.qemu.org/qemu into qom-cpu
Adapt header include paths.
Signed-off-by: Andreas Färber <afaerber@suse.de>
cpu: Move kvm_state field into CPUState
Adapt some functions to take CPUState / {PowerPC,S390}CPU argument.
cpu: Move kvm_run into CPUState
Pass CPUState / {X86,S390}CPU to helper functions.
kvm: Pass CPUState to kvm_arch_*
Move kvm_vcpu_dirty field into CPUState to simplify things and changeits type to bool while at it.
kvm: Pass CPUState to kvm_vcpu_ioctl()
Adapt helper functions to pass X86CPU / PowerPCCPU / S390CPU.
softmmu: move include files to include/sysemu/
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
misc: move include files to include/qemu/
cpus: Pass CPUState to qemu_cpu_kick()
CPUArchState is no longer needed there.
s390: use sync regs for register transfer
Newer kernels provide the guest registers in kvm_run. Lets usethose if available (i.e. the capability is set). This avoidsioctls on cpu_synchronize_state making intercepts faster.
In addition, we have now the prefix register, the access registers...
s390: sclp base support
This adds a more generic infrastructure for handling Service-Callrequests on s390. Currently we only support a small subset of ReadSCP Info directly in target-s390x. This patch provides the baseinfrastructure for supporting more commands and moves Read SCP...
s390: Fix error handling and condition code of service call
Invalid sccb addresses will cause specification or addressing exception.Lets add those checks. Furthermore, the good case (cc=0) was incorrectfor KVM, we did not set the CC at all. We now use return codes < 0...
s390: autodetect map private
By default qemu will use MAP_PRIVATE for guest pages. This will writeprotect pages and thus break on s390 systems that dont support this feature.Therefore qemu has a hack to always use MAP_SHARED for s390. But MAP_SHAREDhas other problems (no dirty pages tracking, a lot more swap overhead etc.)...
s390: stop target cpu on sigp initial reset
We must not run the target cpu after an initial reset. This makessystem_reset more reliable for smp guests.
target-s390x: Pass S390CPU to s390_cpu_restart()
Needed for qemu_cpu_kick().
s390-virtio: Let s390_cpu_addr2state() return S390CPU
Convert ipi_states to S390CPU**.
Needed for s390_cpu_restart() in handle_sigp().
S390: support reboot for kvm on s390
This patch adds reboot support for s390x-softmmu by callingthe generic reboot support in kvm.
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>Signed-off-by: Alexander Graf <agraf@suse.de>
S390: dont call system_shutdown on disabled wait
A disabled wait usually indicates a guest problem. Dont shutdown theguest to allow guest dumping.Have some special cases, e.g. a quiesce disabled wait. In that casewe want to shutdown.
Long term solution might be a crashed/panic indication....
target-s390x: Don't overuse CPUState
Scripted conversion: sed -i "s/CPUState/CPUS390XState/g" target-s390x/*.[hc] sed -i "s/#define CPUS390XState/#define CPUState/" target-s390x/cpu.h
Signed-off-by: Andreas Färber <afaerber@suse.de>Acked-by: Anthony Liguori <aliguori@us.ibm.com>
s390: fix cpu hotplug / cpu activity on interrupts
The add_del/running_cpu code and env->halted are tracking stopped cpus.Sleeping cpus (idle and enabled for interrupts) are waiting inside thekernel.No interrupt besides the restart can move a cpu from stopped to...
s390: Fix cpu shutdown for KVM
On s390 a shutdown is the state of all CPUs being either stoppedor disabled (for interrupts) waiting. We have to track the overallnumber of running CPUs to call the shutdown sequence accordingly.This patch implements the counting and shutdown handling for the...
s390x: Fix debugging for unknown sigp order codes
On unknown sigp order codes we print a debug message. This patchfixes the output, since we want to see the order_code and notthe register numbers.Patch applies on agraf tree.
s390x: fix smp support for kvm
Currently smp support for kvm does not work. Qemu does a kvm run even onsecondary CPUs which dont have a sane state (initial psw == 0)triggering some program faults. Architecturally these cpus are in the stoppedstate, so we should not do the kvm run ioctl. (these CPUs will be started...
s390x: Adjust internal kvm code
We're now finally emulating an s390x CPU, so we can move quite some logicfrom the kvm code out into generic CPU code.
This patch does this and adjusts the interfaces according to what the codearound now expects to be able to call....
s390x: Prepare cpu.h for emulation
We need to add some more logic to the CPU description to leverage emulationof an s390x CPU. This patch adds all the required helpers, fields in CPUStateand constant definitions required for user and system emulation....
s390x: fix KVM target
During Jan's rework of the generic KVM layer, he added some more error checksand actually aborted if something went wrong. Unfortunately, one of the s390internal error codes slipped through, aborting the VM without needing to.
This patch fixes booting of S390x virtual machines in KVM....
kvm: Align kvm_arch_handle_exit to kvm_cpu_exec changes
Make the return code of kvm_arch_handle_exit directly usable forkvm_cpu_exec. This is straightforward for x86 and ppc, just s390would require more work. Avoid this for now by pushing the return code...
kvm: Rename kvm_arch_process_irqchip_events to async_events
We will broaden the scope of this function on x86 beyond irqchip events.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
always qemu_cpu_kick after unhalting a cpu
This ensures env->halt_cond is broadcast, and the loop inqemu_tcg_wait_io_event and qemu_kvm_wait_io_event is exitednaturally rather than through a timeout.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
kvm: Drop return values from kvm_arch_pre/post_run
We do not check them, and the only arch with non-empty implementationsalways returns 0 (this is also true for qemu-kvm).
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>CC: Alexander Graf <agraf@suse.de>...
kvm: Provide sigbus services arch-independently
Provide arch-independent kvm_on_sigbus* stubs to remove the #ifdef'eryfrom cpus.c. This patch also fixes --disable-kvm build by providing themissing kvm_on_sigbus_vcpu kvm-stub.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>...
kvm: Consolidate must-have capability checks
Instead of splattering the code with #ifdefs and runtime checks forcapabilities we cannot work without anyway, provide central testinfrastructure for verifying their availability both at build andruntime.
kvm: Drop smp_cpus argument from init functions
No longer used.
s390: compile fixes
The s390 target doesn't compile out of the box anymore. This patch fixes allthe obvious glitches that got introduced in the last few weeks.
Signed-off-by: Alexander Graf <agraf@suse.de>Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
target-s390: enable SIGP Initial Reset
For SMP to work with KVM, we need to properly emulate the SIGP Initial ResetCommand. Recent (2.6.32) kernels issue that before the SIGP Reset command thatactually wakes up the vcpu.
This patch makes -smp work on S390x....
Do not stop VM if emulation failed in userspace.
Continue vcpu execution in case emulation failure happened while vcpuwas in userspace. In this case #UD will be injected into the guestallowing guest OS to kill offending process and continue.
Signed-off-by: Gleb Natapov <gleb@redhat.com>...
kvm: enable smp > 1
Process INIT/SIPI requests and enable -smp > 1.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>Signed-off-by: Avi Kivity <avi@redhat.com>
KVM: Rework VCPU state writeback API
This grand cleanup drops all reset and vmsave/load relatedsynchronization points in favor of four(!) generic hooks:
- cpu_synchronize_all_states in qemu_savevm_state_complete (initial sync from kernel before vmsave)...
Fix incorrect exception_index use
env->exception_index should be cleared with -1, not 0.
See also 821b19fe923ac49a24cdb4af902584fdd019cee6.
Spotted by Igor Kovalenko.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
target-s390: Fail on unknown instructions
We were being a bit too nice and didn't give the guest an invalid instructioninterrupt.
While that works, it's not exactly the fastest thing to do, since now theguest doesn't know that we're not really implementing that instruction, so it...
Add KVM support for S390x
S390x was one of the first platforms that received support for KVM back in theday. Unfortunately until now there hasn't been a qemu implementation that wouldenable users to actually run guests.
So let's include support for KVM S390x in qemu!...