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* KVM: s390: migrate vcpu interrupt stateJens Freimann2015-03-311-0/+4
| | | | | | | | | | | | | | | | | | | | | | | This patch adds support to migrate vcpu interrupts. Two new vcpu ioctls are added which get/set the complete status of pending interrupts in one go. The ioctls are marked as available with the new capability KVM_CAP_S390_IRQ_STATE. We can not use a ONEREG, as the number of pending local interrupts is not constant and depends on the number of CPUs. To retrieve the interrupt state we add an ioctl KVM_S390_GET_IRQ_STATE. Its input parameter is a pointer to a struct kvm_s390_irq_state which has a buffer and length. For all currently pending interrupts, we copy a struct kvm_s390_irq into the buffer and pass it to userspace. To store interrupt state into a buffer provided by userspace, we add an ioctl KVM_S390_SET_IRQ_STATE. It passes a struct kvm_s390_irq_state into the kernel and injects all interrupts contained in the buffer. Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
* KVM: s390: deliver floating interrupts in order of priorityJens Freimann2015-03-311-1/+1
| | | | | | | | | | | | | | | | | | | | This patch makes interrupt handling compliant to the z/Architecture Principles of Operation with regard to interrupt priorities. Add a bitmap for pending floating interrupts. Each bit relates to a interrupt type and its list. A turned on bit indicates that a list contains items (interrupts) which need to be delivered. When delivering interrupts on a cpu we can merge the existing bitmap for cpu-local interrupts and floating interrupts and have a single mechanism for delivery. Currently we have one list for all kinds of floating interrupts and a corresponding spin lock. This patch adds a separate list per interrupt type. An exception to this are service signal and machine check interrupts, as there can be only one pending interrupt at a time. Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
* KVM: s390: represent SIMD cap in kvm facilityMichael Mueller2015-03-171-0/+11
| | | | | | | | | | | | | | The patch represents capability KVM_CAP_S390_VECTOR_REGISTERS by means of the SIMD facility bit. This allows to a) disable the use of SIMD when used in conjunction with a not-SIMD-aware QEMU, b) to enable SIMD when used with a SIMD-aware version of QEMU and c) finally by means of a QEMU version using the future cpu model ioctls. Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com> Reviewed-by: Eric Farman <farman@linux.vnet.ibm.com> Tested-by: Eric Farman <farman@linux.vnet.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: Guest's memory access functions get access registersAlexander Yarygin2015-03-171-4/+21
| | | | | | | | | | | In access register mode, the write_guest() read_guest() and other functions will invoke the access register translation, which requires an ar, designated by one of the instruction fields. Signed-off-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com> Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: Spelling s/intance/instance/Geert Uytterhoeven2015-03-171-1/+1
| | | | | | Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Message-Id: <1425932832-6244-1-git-send-email-geert+renesas@glider.be> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: Machine CheckEric Farman2015-03-061-0/+3
| | | | | | | | | | | | Store additional status in the machine check handler, in order to collect status (such as vector registers) that is not defined by store status. Signed-off-by: Eric Farman <farman@linux.vnet.ibm.com> Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: reinjection of irqs can fail in the tpi handlerDavid Hildenbrand2015-03-061-2/+2
| | | | | | | | | | | | | | | The reinjection of an I/O interrupt can fail if the list is at the limit and between the dequeue and the reinjection, another I/O interrupt is injected (e.g. if user space floods kvm with I/O interrupts). This patch avoids this memory leak and returns -EFAULT in this special case. This error is not recoverable, so let's fail hard. This can later be avoided by not dequeuing the interrupt but working directly on the locked list. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Cc: stable@vger.kernel.org # 3.16+ Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: include guest facilities in kvm facility testMichael Mueller2015-03-041-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | Most facility related decisions in KVM have to take into account: - the facilities offered by the underlying run container (LPAR/VM) - the facilities supported by the KVM code itself - the facilities requested by a guest VM This patch adds the KVM driver requested facilities to the test routine. It additionally renames struct s390_model_fac to kvm_s390_fac and its field names to be more meaningful. The semantics of the facilities stored in the KVM architecture structure is changed. The address arch.model.fac->list now points to the guest facility list and arch.model.fac->mask points to the KVM facility mask. This patch fixes the behaviour of KVM for some facilities for guests that ignore the guest visible facility bits, e.g. guests could use transactional memory intructions on hosts supporting them even if the chosen cpu model would not offer them. The userspace interface is not affected by this change. Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: use facilities and cpu_id per KVMMichael Mueller2015-02-091-4/+9
| | | | | | | | | | | The patch introduces facilities and cpu_ids per virtual machine. Different virtual machines may want to expose different facilities and cpu ids to the guest, so let's make them per-vm instead of global. Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com> Reviewed-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>
* KVM: s390: only one external call may be pending at a timeDavid Hildenbrand2015-01-231-1/+1
| | | | | | | | | | | | | | | | | | | | Only one external call may be pending at a vcpu at a time. For this reason, we have to detect whether the SIGP externcal call interpretation facility is available. If so, all external calls have to be injected using this mechanism. SIGP EXTERNAL CALL orders have to return whether another external call is already pending. This check was missing until now. SIGP SENSE hasn't returned yet in all conditions whether an external call was pending. If a SIGP EXTERNAL CALL irq is to be injected and one is already pending, -EBUSY is returned. Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: a VCPU may only stop when no interrupts are left pendingDavid Hildenbrand2015-01-231-1/+1
| | | | | | | | | | | | | | As a SIGP STOP is an interrupt with the least priority, it may only result in stop of the vcpu when no other interrupts are left pending. To detect whether a non-stop irq is pending, we need a way to mask out stop irqs from the general kvm_cpu_has_interrupt() function. For this reason, the existing function (with an outdated name) is replaced by kvm_s390_vcpu_has_irq() which allows to mask out pending stop irqs. Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: handle stop irqs without action_bitsDavid Hildenbrand2015-01-231-0/+2
| | | | | | | | | | | | | | | | | | | | | This patch removes the famous action_bits and moves the handling of SIGP STOP AND STORE STATUS directly into the SIGP STOP interrupt. The new local interrupt infrastructure is used to track pending stop requests. STOP irqs are the only irqs that don't get actively delivered. They remain pending until the stop function is executed (=stop intercept). If another STOP irq is already pending, -EBUSY will now be returned (needed for the SIGP handling code). Migration of pending SIGP STOP (AND STORE STATUS) orders should now be supported out of the box. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: handle pending local interrupts via bitmapJens Freimann2014-11-281-1/+4
| | | | | | | | | | | | | | | | | | | This patch adapts handling of local interrupts to be more compliant with the z/Architecture Principles of Operation and introduces a data structure which allows more efficient handling of interrupts. * get rid of li->active flag, use bitmap instead * Keep interrupts in a bitmap instead of a list * Deliver interrupts in the order of their priority as defined in the PoP * Use a second bitmap for sigp emergency requests, as a CPU can have one request pending from every other CPU in the system. Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Reviewed-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>
* KVM: s390: Fix rewinding of the PSW pointing to an EXECUTE instructionThomas Huth2014-11-281-2/+4
| | | | | | | | | | | | | | | | | A couple of our interception handlers rewind the PSW to the beginning of the instruction to run the intercepted instruction again during the next SIE entry. This normally works fine, but there is also the possibility that the instruction did not get run directly but via an EXECUTE instruction. In this case, the PSW does not point to the instruction that caused the interception, but to the EXECUTE instruction! So we've got to rewind the PSW to the beginning of the EXECUTE instruction instead. This is now accomplished with a new helper function kvm_s390_rewind_psw(). Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: register flic ops dynamicallyCornelia Huck2014-09-171-0/+1
| | | | | | | | | | | Using the new kvm_register_device_ops() interface makes us get rid of an #ifdef in common code. Cc: Gleb Natapov <gleb@kernel.org> Cc: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* KVM: s390: add __must_check to interrupt deliver functionsChristian Borntraeger2014-09-101-1/+1
| | | | | | | | We now propagate interrupt injection errors back to the ioctl. We should mark functions that might fail with __must_check. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
* KVM: s390: return -EFAULT if lowcore is not mapped during irq deliveryJens Freimann2014-08-251-1/+1
| | | | | | | | | | | | | | | Currently we just kill the userspace process and exit the thread immediatly without making sure that we don't hold any locks etc. Improve this by making KVM_RUN return -EFAULT if the lowcore is not mapped during interrupt delivery. To achieve this we need to pass the return code of guest memory access routines used in interrupt delivery all the way back to the KVM_RUN ioctl. Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: implement KVM_REQ_TLB_FLUSH and make use of itDavid Hildenbrand2014-08-251-1/+1
| | | | | | | | | | | Use the KVM_REQ_TLB_FLUSH request in order to trigger tlb flushes instead of manipulating the SIE control block whenever we need it. Also trigger it for a control register sync directly instead of (ab)using kvm_s390_set_prefix(). Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: no special machine check deliveryChristian Borntraeger2014-08-251-1/+0
| | | | | | | | The load PSW handler does not have to inject pending machine checks. This can wait until the CPU runs the generic interrupt injection code. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
* KVM: s390: remove the tasklet used by the hrtimerDavid Hildenbrand2014-07-211-1/+0
| | | | | | | | | | We can get rid of the tasklet used for waking up a VCPU in the hrtimer code but wakeup the VCPU directly. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: move vcpu wakeup code to a central pointDavid Hildenbrand2014-07-211-0/+1
| | | | | | | | | | | | | | | | Let's move the vcpu wakeup code to a central point. We should set the vcpu->preempted flag only if the target is actually sleeping and before the real wakeup happens. Otherwise the preempted flag might be set, when not necessary. This may result in immediate reschedules after schedule() in some scenarios. The wakeup code doesn't require the local_int.lock to be held. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: implement KVM_(S|G)ET_MP_STATE for user space state controlDavid Hildenbrand2014-07-101-0/+6
| | | | | | | | | | | | | | | | This patch - adds s390 specific MP states to linux headers and documents them - implements the KVM_{SET,GET}_MP_STATE ioctls - enables KVM_CAP_MP_STATE - allows user space to control the VCPU state on s390. If user space sets the VCPU state using the ioctl KVM_SET_MP_STATE, we can disable manual changing of the VCPU state and trust user space to do the right thing. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: remove __cpu_is_stopped and expose is_vcpu_stoppedDavid Hildenbrand2014-07-101-2/+2
| | | | | | | | | | | | | The function "__cpu_is_stopped" is not used any more. Let's remove it and expose the function "is_vcpu_stopped" instead, which is actually what we want. This patch also converts an open coded check for CPUSTAT_STOPPED to is_vcpu_stopped(). Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: split SIE state guest prefix fieldMichael Mueller2014-05-161-1/+7
| | | | | | | | | | | | | | | This patch splits the SIE state guest prefix at offset 4 into a prefix bit field. Additionally it provides the access functions: - kvm_s390_get_prefix() - kvm_s390_set_prefix() to access the prefix per vcpu. Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: interpretive execution of SIGP EXTERNAL CALLDavid Hildenbrand2014-05-161-0/+2
| | | | | | | | | | | | | | | | | | | If the sigp interpretation facility is installed, most SIGP EXTERNAL CALL operations will be interpreted instead of intercepted. A partial execution interception will occurr at the sending cpu only if the target cpu is in the wait state ("W" bit in the cpuflags set). Instruction interception will only happen in error cases (e.g. cpu addr invalid). As a sending cpu might set the external call interrupt pending flags at the target cpu at every point in time, we can't handle this kind of interrupt using our kvm interrupt injection mechanism. The injection will be done automatically by the SIE when preparing the start of the target cpu. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> CC: Thomas Huth <thuth@linux.vnet.ibm.com> [Adopt external call injection to check for sigp interpretion] Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: Introduce helper function for faulting-in a guest pageThomas Huth2014-05-161-0/+1
| | | | | | | | | | | | Rework the function kvm_arch_fault_in_sync() to become a proper helper function for faulting-in a guest page. Now it takes the guest address as a parameter and does not ignore the possible error code from gmap_fault() anymore (which could cause undetected error conditions before). Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: Improve is_valid_psw()Thomas Huth2014-05-161-0/+1
| | | | | | | | | | | | As a program status word is also invalid (and thus generates an specification exception) if the instruction address is not even, we should test this in is_valid_psw(), too. This patch also exports the function so that it becomes available for other parts of the S390 KVM code as well. Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: introduce kvm_s390_vcpu_{start,stop}David Hildenbrand2014-04-291-0/+2
| | | | | | | | | | | | This patch introduces two new functions to set/clear the CPUSTAT_STOPPED bit and makes use of it at all applicable places. These functions prepare the additional execution of code when starting/stopping a vcpu. The CPUSTAT_STOPPED bit should not be touched outside of these functions. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: replace TDB_ADDR by __LC_PGM_TDBMichael Mueller2014-04-221-1/+0
| | | | | | | | | | The generically assembled low core labels already contain the address for the TDB. Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: Drop pending interrupts on guest exitChristian Borntraeger2014-04-221-0/+1
| | | | | | | | | On hard exits (abort, sigkill) we have have some kvm_s390_interrupt_info structures hanging around. Delete those on exit to avoid memory leaks. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> CC: stable@vger.kernel.org Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
* KVM: s390: hardware support for guest debuggingDavid Hildenbrand2014-04-221-0/+10
| | | | | | | | | | | | | | | | | | | This patch adds support to debug the guest using the PER facility on s390. Single-stepping, hardware breakpoints and hardware watchpoints are supported. In order to use the PER facility of the guest without it noticing it, the control registers of the guest have to be patched and access to them has to be intercepted(stctl, stctg, lctl, lctlg). All PER program interrupts have to be intercepted and only the relevant PER interrupts for the guest have to be given back. Special care has to be taken about repeated exits on the same hardware breakpoint. The intervention of the host in the guests PER configuration is not fully transparent. PER instruction nullification can not be used by the guest and too many storage alteration events may be reported to the guest (if it is activated for special address ranges only) when the host concurrently debugging it. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: emulate stctl and stctgDavid Hildenbrand2014-04-221-0/+1
| | | | | | | | Introduce the methods to emulate the stctl and stctg instruction. Added tracing code. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: reinject io interrupt on tpi failureCornelia Huck2014-04-221-0/+2
| | | | | | | | | | The tpi instruction should be suppressed on addressing and protection exceptions, so we need to re-inject the dequeued io interrupt in that case. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: add 'pgm' member to kvm_vcpu_arch and helper functionHeiko Carstens2014-04-221-0/+33
| | | | | | | | | | | | | Add a 'struct kvm_s390_pgm_info pgm' member to kvm_vcpu_arch. This structure will be used if during instruction emulation in the context of a vcpu exception data needs to be stored somewhere. Also add a helper function kvm_s390_inject_prog_cond() which can inject vcpu's last exception if needed. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: export test_vfacility()Heiko Carstens2014-04-221-0/+1
| | | | | | | | | | Make test_vfacility() available for other files. This is needed for the new guest access functions, which test if certain facilities are available for a guest. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: allow injecting every kind of interruptJens Freimann2014-04-221-0/+3
| | | | | | | | Add a new data structure and function that allows to inject all kinds of interrupt as defined in the PoP Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: make cmma usage conditionallyDominik Dingel2014-04-221-2/+5
| | | | | | | | | | | | | | | When userspace reset the guest without notifying kvm, the CMMA state of the pages might be unused, resulting in guest data corruption. To avoid this, CMMA must be enabled only if userspace understands the implications. CMMA must be enabled before vCPU creation. It can't be switched off once enabled. All subsequently created vCPUs will be enabled for CMMA according to the CMMA state of the VM. Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> [remove now unnecessary calls to page_table_reset_pgste]
* Merge tag 'kvm-3.15-1' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds2014-04-021-0/+7
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull kvm updates from Paolo Bonzini: "PPC and ARM do not have much going on this time. Most of the cool stuff, instead, is in s390 and (after a few releases) x86. ARM has some caching fixes and PPC has transactional memory support in guests. MIPS has some fixes, with more probably coming in 3.16 as QEMU will soon get support for MIPS KVM. For x86 there are optimizations for debug registers, which trigger on some Windows games, and other important fixes for Windows guests. We now expose to the guest Broadwell instruction set extensions and also Intel MPX. There's also a fix/workaround for OS X guests, nested virtualization features (preemption timer), and a couple kvmclock refinements. For s390, the main news is asynchronous page faults, together with improvements to IRQs (floating irqs and adapter irqs) that speed up virtio devices" * tag 'kvm-3.15-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (96 commits) KVM: PPC: Book3S HV: Save/restore host PMU registers that are new in POWER8 KVM: PPC: Book3S HV: Fix decrementer timeouts with non-zero TB offset KVM: PPC: Book3S HV: Don't use kvm_memslots() in real mode KVM: PPC: Book3S HV: Return ENODEV error rather than EIO KVM: PPC: Book3S: Trim top 4 bits of physical address in RTAS code KVM: PPC: Book3S HV: Add get/set_one_reg for new TM state KVM: PPC: Book3S HV: Add transactional memory support KVM: Specify byte order for KVM_EXIT_MMIO KVM: vmx: fix MPX detection KVM: PPC: Book3S HV: Fix KVM hang with CONFIG_KVM_XICS=n KVM: PPC: Book3S: Introduce hypervisor call H_GET_TCE KVM: PPC: Book3S HV: Fix incorrect userspace exit on ioeventfd write KVM: s390: clear local interrupts at cpu initial reset KVM: s390: Fix possible memory leak in SIGP functions KVM: s390: fix calculation of idle_mask array size KVM: s390: randomize sca address KVM: ioapic: reinject pending interrupts on KVM_SET_IRQCHIP KVM: Bump KVM_MAX_IRQ_ROUTES for s390 KVM: s390: irq routing for adapter interrupts. KVM: s390: adapter interrupt sources ...
| * Merge tag 'kvm-s390-20140325' of ↵Paolo Bonzini2014-03-251-0/+1
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into kvm-next 3 fixes - memory leak on certain SIGP conditions - wrong size for idle bitmap (always too big) - clear local interrupts on initial CPU reset 1 performance improvement - improve performance with many guests on certain workloads
| | * KVM: s390: clear local interrupts at cpu initial resetJens Freimann2014-03-251-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | Empty list of local interrupts when vcpu goes through initial reset to provide a clean state Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
| * | KVM: s390: adapter interrupt sourcesCornelia Huck2014-03-211-0/+2
| |/ | | | | | | | | | | | | | | | | | | | | Add a new interface to register/deregister sources of adapter interrupts identified by an unique id via the flic. Adapters may also be maskable and carry a list of pinned pages. These adapters will be used by irq routing later. Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
| * KVM: async_pf: Async page fault support on s390Dominik Dingel2014-01-301-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | This patch enables async page faults for s390 kvm guests. It provides the userspace API to enable and disable_wait this feature. The disable_wait will enforce that the feature is off by waiting on it. Also it includes the diagnose code, called by the guest to enable async page faults. The async page faults will use an already existing guest interface for this purpose, as described in "CP Programming Services (SC24-6084)". Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* | s390/kvm: support collaborative memory managementKonstantin Weitz2014-02-211-0/+2
|/ | | | | | | | | | | | | | This patch enables Collaborative Memory Management (CMM) for kvm on s390. CMM allows the guest to inform the host about page usage (see arch/s390/mm/cmm.c). The host uses this information to avoid swapping in unused pages in the page fault handler. Further, a CPU provided list of unused invalid pages is processed to reclaim swap space of not yet accessed unused pages. [ Martin Schwidefsky: patch reordering and cleanup ] Signed-off-by: Konstantin Weitz <konstantin.weitz@gmail.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* KVM: s390: enable Transactional ExecutionMichael Mueller2014-01-171-0/+6
| | | | | | | | | | | | | | | | | | | | This patch enables transactional execution for KVM guests on s390 systems zec12 or later. We rework the allocation of the page containing the sie_block to also back the Interception Transaction Diagnostic Block. If available the TE facilities will be enabled. Setting bit 73 and 50 in vfacilities bitmask reveals the HW facilities Transactional Memory and Constraint Transactional Memory respectively to the KVM guest. Furthermore, the patch restores the Program-Interruption TDB from the Interception TDB in case a program interception has occurred and the ITDB has a valid format. Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: Removed kvm_s390_inject_sigp_stop()Thomas Huth2013-11-281-1/+0
| | | | | | | | | The function kvm_s390_inject_sigp_stop() as been unused since the removal of the old mmu reload code and thus can be removed safely. Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
* KVM: s390: Always store status during SIGP STOP_AND_STORE_STATUSThomas Huth2013-11-281-2/+2
| | | | | | | | | | | | | The SIGP order STOP_AND_STORE_STATUS is defined to stop a CPU and store its status. However, we only stored the status if the CPU was still running, so make sure that the status is now also stored if the CPU was already stopped. This fixes the problem that the CPU information was not stored correctly in kdump files, rendering them unreadable. Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Cc: stable@vger.kernel.org Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
* KVM: s390: Removed VIRTIODESCSPACEThomas Huth2013-11-281-3/+0
| | | | | | | | | VIRTIODESCSPACE is completely unused nowadays and thus can be removed without any problems. Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
* KVM: s390: Removed SIE_INTERCEPT_UCONTROLThomas Huth2013-11-281-2/+0
| | | | | | | | | The SIE_INTERCEPT_UCONTROL can be removed by moving the related code from kvm_arch_vcpu_ioctl_run() to vcpu_post_run(). Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
* KVM: s390: Allow NULL parameter for kvm_s390_get_regs_rreThomas Huth2013-09-241-2/+4
| | | | | | | | | | | We're not always interested in both registers that are specified for an RRE instruction. So allow NULL as parameter, too, to indicate that we do not need the corresponding value. Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* KVM: s390: Remove dead "rerun vcpu" codeThomas Huth2013-09-241-2/+1
| | | | | | | | | | | | The need for SIE_INTERCEPT_RERUNVCPU has been removed long ago already, with the following commit: f7850c92884b40915001e332a0a33ed4f10158e8 [S390] remove kvm mmu reload on s390 Since the remainders are dead code, they are now removed by this patch. Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-11 21:53:10 +0100