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2018-01-24KVM: s390: add vcpu stat counters for many instructionChristian Borntraeger1-0/+1
The overall instruction counter is larger than the sum of the single counters. We should try to catch all instruction handlers to make this match the summary counter. Let us add sck,tb,sske,iske,rrbe,tb,tpi,tsch,lpsw,pswe.... and remove other unused ones. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Janosch Frank <frankja@linux.vnet.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com>
2017-12-06KVM: s390: Remove redundant license textGreg Kroah-Hartman1-4/+0
Now that the SPDX tag is in all arch/s390/kvm/ files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Cornelia Huck <cohuck@redhat.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Message-Id: <20171124140043.10062-9-gregkh@linuxfoundation.org> Acked-by: Cornelia Huck <cohuck@redhat.com> Acked-by: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2017-12-06KVM: s390: add SPDX identifiers to the remaining filesGreg Kroah-Hartman1-0/+1
It's good to have SPDX identifiers in all files to make it easier to audit the kernel tree for correct licenses. Update the arch/s390/kvm/ files with the correct SPDX license identifier based on the license text in the file itself. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This work is based on a script and data from Thomas Gleixner, Philippe Ombredanne, and Kate Stewart. Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Cornelia Huck <cohuck@redhat.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Message-Id: <20171124140043.10062-3-gregkh@linuxfoundation.org> Acked-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2017-09-08Merge tag 'kvm-4.14-1' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds1-1/+1
Pull KVM updates from Radim Krčmář: "First batch of KVM changes for 4.14 Common: - improve heuristic for boosting preempted spinlocks by ignoring VCPUs in user mode ARM: - fix for decoding external abort types from guests - added support for migrating the active priority of interrupts when running a GICv2 guest on a GICv3 host - minor cleanup PPC: - expose storage keys to userspace - merge kvm-ppc-fixes with a fix that missed 4.13 because of vacations - fixes s390: - merge of kvm/master to avoid conflicts with additional sthyi fixes - wire up the no-dat enhancements in KVM - multiple epoch facility (z14 feature) - Configuration z/Architecture Mode - more sthyi fixes - gdb server range checking fix - small code cleanups x86: - emulate Hyper-V TSC frequency MSRs - add nested INVPCID - emulate EPTP switching VMFUNC - support Virtual GIF - support 5 level page tables - speedup nested VM exits by packing byte operations - speedup MMIO by using hardware provided physical address - a lot of fixes and cleanups, especially nested" * tag 'kvm-4.14-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (67 commits) KVM: arm/arm64: Support uaccess of GICC_APRn KVM: arm/arm64: Extract GICv3 max APRn index calculation KVM: arm/arm64: vITS: Drop its_ite->lpi field KVM: arm/arm64: vgic: constify seq_operations and file_operations KVM: arm/arm64: Fix guest external abort matching KVM: PPC: Book3S HV: Fix memory leak in kvm_vm_ioctl_get_htab_fd KVM: s390: vsie: cleanup mcck reinjection KVM: s390: use WARN_ON_ONCE only for checking KVM: s390: guestdbg: fix range check KVM: PPC: Book3S HV: Report storage key support to userspace KVM: PPC: Book3S HV: Fix case where HDEC is treated as 32-bit on POWER9 KVM: PPC: Book3S HV: Fix invalid use of register expression KVM: PPC: Book3S HV: Fix H_REGISTER_VPA VPA size validation KVM: PPC: Book3S HV: Fix setting of storage key in H_ENTER KVM: PPC: e500mc: Fix a NULL dereference KVM: PPC: e500: Fix some NULL dereferences on error KVM: PPC: Book3S HV: Protect updates to spapr_tce_tables list KVM: s390: we are always in czam mode KVM: s390: expose no-DAT to guest and migration support KVM: s390: sthyi: remove invalid guest write access ...
2017-08-08KVM: s390: implements the kvm_arch_vcpu_in_kernel()Longpeng(Mike)1-1/+1
This implements kvm_arch_vcpu_in_kernel() for s390. DIAG is a privileged operation, so it cannot be called from problem state (user mode). Signed-off-by: Longpeng(Mike) <longpeng2@huawei.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-08-08KVM: add spinlock optimization frameworkLongpeng(Mike)1-1/+1
If a vcpu exits due to request a user mode spinlock, then the spinlock-holder may be preempted in user mode or kernel mode. (Note that not all architectures trap spin loops in user mode, only AMD x86 and ARM/ARM64 currently do). But if a vcpu exits in kernel mode, then the holder must be preempted in kernel mode, so we should choose a vcpu in kernel mode as a more likely candidate for the lock holder. This introduces kvm_arch_vcpu_in_kernel() to decide whether the vcpu is in kernel-mode when it's preempted. kvm_vcpu_on_spin's new argument says the same of the spinning VCPU. Signed-off-by: Longpeng(Mike) <longpeng2@huawei.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-26KVM: s390: use new mm defines instead of magic valuesHeiko Carstens1-4/+4
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Janosch Frank <frankja@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-06-10KVM: s390: provide logging for diagnose 0x500Christian Borntraeger1-0/+5
We might need to debug some virtio things, so better have diagnose 500 logged. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2016-03-08s390/mm: split arch/s390/mm/pgtable.cMartin Schwidefsky1-0/+1
The pgtable.c file is quite big, before it grows any larger split it into pgtable.c, pgalloc.c and gmap.c. In addition move the gmap related header definitions into the new gmap.h header and all of the pgste helpers from pgtable.h to pgtable.c. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-11-30KVM: Use common function for VCPU lookup by idDavid Hildenbrand1-8/+3
Let's reuse the new common function for VPCU lookup by id. Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Dominik Dingel <dingel@linux.vnet.ibm.com> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> [split out the new function into a separate patch]
2015-07-29KVM: s390: add more debug data for the pfault diagnosesChristian Borntraeger1-0/+4
We're not only interested in the address of the control block, but also in the requested subcommand and for the token subcommand, in the specified token address and masks. Suggested-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
2015-07-29KVM: s390: Improve vcpu event debugging for diagnosesChristian Borntraeger1-1/+3
Let's add a vcpu event for the page reference handling and change the default debugging level for the ipl diagnose. Both are not frequent AND change the global state, so lets log them always. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2015-07-29KVM: s390: add kvm stat counter for all diagnosesChristian Borntraeger1-1/+4
Sometimes kvm stat counters are the only performance metric to check after something went wrong. Let's add additional counters for some diagnoses. In addition do the count for diag 10 all the time, even if we inject a program interrupt. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
2015-04-07Merge tag 'kvm-arm-for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into 'kvm-next'Paolo Bonzini1-1/+1
KVM/ARM changes for v4.1: - fixes for live migration - irqfd support - kvm-io-bus & vgic rework to enable ioeventfd - page ageing for stage-2 translation - various cleanups
2015-03-26KVM: Redesign kvm_io_bus_ API to pass VCPU structure to the callbacks.Nikolay Nikolaev1-1/+1
This is needed in e.g. ARM vGIC emulation, where the MMIO handling depends on the VCPU that does the access. Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com> Signed-off-by: Andre Przywara <andre.przywara@arm.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-03-17KVM: s390: Guest's memory access functions get access registersAlexander Yarygin1-2/+2
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>
2014-09-10KVM: s390/cmm: Fix prefix handling for diag 10 balloonChristian Borntraeger1-8/+18
The old handling of prefix pages was broken in the diag10 ballooner. We now rely on gmap_discard to check for start > end and do a slow path if the prefix swap pages are affected: 1. discard the pages from start to prefix 2. discard the absolute 0 pages 3. discard the pages after prefix swap to end Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
2014-08-25KVM: s390/mm: cleanup gmap function arguments, variable namesMartin Schwidefsky1-4/+4
Make the order of arguments for the gmap calls more consistent, if the gmap pointer is passed it is always the first argument. In addition distinguish between guest address and user address by naming the variables gaddr for a guest address and vmaddr for a user address. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-07-10KVM: s390: implement KVM_(S|G)ET_MP_STATE for user space state controlDavid Hildenbrand1-1/+2
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>
2014-05-16KVM: s390: split SIE state guest prefix fieldMichael Mueller1-1/+1
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>
2014-04-29KVM: s390: introduce kvm_s390_vcpu_{start,stop}David Hildenbrand1-1/+1
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>
2014-04-22KVM: s390: convert pfault codeHeiko Carstens1-5/+4
Convert pfault code to new guest access functions. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: Dominik Dingel <dingel@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-04-22KVM: s390: make cmma usage conditionallyDominik Dingel1-6/+0
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]
2014-04-22KVM: s390: Clear storage keysDominik Dingel1-3/+3
page_table_reset_pgste() already does a complete page table walk to reset the pgste. Enhance it to initialize the storage keys to PAGE_DEFAULT_KEY if requested by the caller. This will be used for lazy storage key handling. Also provide an empty stub for !CONFIG_PGSTE Lets adopt the current code (diag 308) to not clear the keys. Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com> Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-04-08Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linuxLinus Torvalds1-0/+4
Pull second set of s390 patches from Martin Schwidefsky: "The second part of Heikos uaccess rework, the page table walker for uaccess is now a thing of the past (yay!) The code change to fix the theoretical TLB flush problem allows us to add a TLB flush optimization for zEC12, this machine has new instructions that allow to do CPU local TLB flushes for single pages and for all pages of a specific address space. Plus the usual bug fixing and some more cleanup" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/uaccess: rework uaccess code - fix locking issues s390/mm,tlb: optimize TLB flushing for zEC12 s390/mm,tlb: safeguard against speculative TLB creation s390/irq: Use defines for external interruption codes s390/irq: Add defines for external interruption codes s390/sclp: add timeout for queued requests kvm/s390: also set guest pages back to stable on kexec/kdump lcs: Add missing destroy_timer_on_stack() s390/tape: Add missing destroy_timer_on_stack() s390/tape: Use del_timer_sync() s390/3270: fix crash with multiple reset device requests s390/bitops,atomic: add missing memory barriers s390/zcrypt: add length check for aligned data to avoid overflow in msg-type 6
2014-04-02Merge tag 'kvm-3.15-1' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds1-0/+84
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 ...
2014-04-01kvm/s390: also set guest pages back to stable on kexec/kdumpChristian Borntraeger1-0/+4
We need to reset the usage state of the pages on kexec/kdump, which use subcode 0 and 1. We will only do the cmma reset in the kernel, everything else is done in userspace as before. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2014-02-21s390/kvm: set guest page states to stable on re-iplMartin Schwidefsky1-0/+3
The guest page state needs to be reset to stable for all pages on initial program load via diagnose 0x308. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2014-01-30KVM: async_pf: Async page fault support on s390Dominik Dingel1-0/+84
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>
2013-12-11KVM: s390: ioeventfd: ignore leftmost bitsDominik Dingel1-1/+1
The diagnose 500 subcode 3 contains the 32 bit subchannel id in bits 32-63 (counting from the left). As for other I/O instructions, bits 0-31 should be ignored and thus not be passed to kvm_io_bus_write_cookie(). This fixes a bug where the guest passed non-zero bits 0-31 which the host tried to interpret, leading to ioeventfd notification failures. Cc: stable@vger.kernel.org Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2013-11-28KVM: s390: fix diagnose code extractionHeiko Carstens1-1/+1
The diagnose code to be used is the contents of the base register (if not zero), plus the displacement. The current code ignores the base register contents. So let's fix that... Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Cc: stable@vger.kernel.org Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2013-09-24KVM: s390: Lock kvm->srcu at the appropriate placesThomas Huth1-3/+1
The kvm->srcu lock has to be held while accessing the memory of guests and during certain other actions. This patch now adds the locks to the __vcpu_run function so that all affected code is protected now (and additionally to the KVM_S390_STORE_STATUS ioctl, which can be called out-of-band and needs a separate lock). Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-07-18KVM: s390: use cookies for ioeventfdCornelia Huck1-4/+13
Make use of cookies for the virtio ccw notification hypercall to speed up lookup of devices on the io bus. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> [Small fix to a comment. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-06-20KVM: s390: Check for PSTATE when handling DIAGNOSEThomas Huth1-0/+3
DIAGNOSE is a privileged instruction and thus we must make sure that we are in supervisor mode before taking any other actions. 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> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-03-05KVM: s390: Wire up ioeventfd.Cornelia Huck1-0/+26
Enable ioeventfd support on s390 and hook up diagnose 500 virtio-ccw notifications. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-07-26KVM: s390: Add implementation-specific trace eventsCornelia Huck1-0/+2
Introduce a new trace system, kvm-s390, for some kvm/s390 specific trace points: - injection of interrupts - delivery of interrupts to the guest - creation/destruction of kvm machines and vcpus - stop actions for vcpus - reset requests for userspace Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-07-26KVM: s390: Add architectural trace eventsCornelia Huck1-0/+2
Add trace events for several s390 architecture specifics: - SIE entry/exit - common intercepts - common instructions (sigp/diagnose) Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-07-20s390/comments: unify copyright messages and remove file namesHeiko Carstens1-2/+2
Remove the file name from the comment at top of many files. In most cases the file name was wrong anyway, so it's rather pointless. Also unify the IBM copyright statement. We did have a lot of sightly different statements and wanted to change them one after another whenever a file gets touched. However that never happened. Instead people start to take the old/"wrong" statements to use as a template for new files. So unify all of them in one go. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2012-04-30KVM: s390: use kvm_vcpu_on_spin for diag 0x44Christian Borntraeger1-3/+1
Lets replace the old open coded version of diag 0x44 (which relied on compat_sched_yield) with kvm_vcpu_on_spin. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-04-30KVM: s390: Implement the directed yield (diag 9c) hypervisor call for KVMKonstantin Weitz1-0/+25
This patch implements the directed yield hypercall found on other System z hypervisors. It delegates execution time to the virtual cpu specified in the instruction's parameter. Useful to avoid long spinlock waits in the guest. Christian Borntraeger: moved common code in virt/kvm/ Signed-off-by: Konstantin Weitz <WEITZKON@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-03-05KVM: s390: provide general purpose guest registers via kvm_runChristian Borntraeger1-3/+3
This patch adds the general purpose registers to the kvm_run structure. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-11-17KVM: s390: Fix RUNNING flag misinterpretationCornelia Huck1-1/+1
CPUSTAT_RUNNING was implemented signifying that a vcpu is not stopped. This is not, however, what the architecture says: RUNNING should be set when the host is acting on the behalf of the guest operating system. CPUSTAT_RUNNING has been changed to be set in kvm_arch_vcpu_load() and to be unset in kvm_arch_vcpu_put(). For signifying stopped state of a vcpu, a host-controlled bit has been used and is set/unset basically on the reverse as the old CPUSTAT_RUNNING bit (including pushing it down into stop handling proper in handle_stop()). Cc: stable@kernel.org Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-10-30[S390] kvm: Handle diagnose 0x10 (release pages)Christian Borntraeger1-1/+31
Linux on System z uses a ballooner based on diagnose 0x10. (aka as collaborative memory management). This patch implements diagnose 0x10 on the guest address space. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-02-26[S390] Replace ENOTSUPP usage with EOPNOTSUPPHeiko Carstens1-2/+2
ENOTSUPP is not supposed to leak to userspace so lets just use EOPNOTSUPP everywhere. Doesn't fix a bug, but makes future reviews easier. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2009-01-09[S390] Use unsigned long long for u64 on 64bit.Heiko Carstens1-1/+1
As requested by Andrew. Same as what sparc did. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-06-06KVM: s390: use yield instead of schedule to implement diag 0x44Christian Borntraeger1-1/+1
diag 0x44 is the common way on s390 to yield the cpu to the hypervisor. It is called by the guest in cpu_relax and in the spinlock code to yield to other guest cpus. This semantic is similar to yield. Lets replace the call to schedule with yield to make sure that current is really yielding. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: s390: intercepts for diagnose instructionsChristian Borntraeger1-0/+67
This patch introduces interpretation of some diagnose instruction intercepts. Diagnose is our classic architected way of doing a hypercall. This patch features the following diagnose codes: - vm storage size, that tells the guest about its memory layout - time slice end, which is used by the guest to indicate that it waits for a lock and thus cannot use up its time slice in a useful way - ipl functions, which a guest can use to reset and reboot itself In order to implement ipl functions, we also introduce an exit reason that causes userspace to perform various resets on the virtual machine. All resets are described in the principles of operation book, except KVM_S390_RESET_IPL which causes a reboot of the machine. Acked-by: Martin Schwidefsky <martin.schwidefsky@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
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