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* KVM: remove kvm_arch_has_vcpu_debugfs()Paolo Bonzini2019-08-051-10/+0Star
| | | | | | | | There is no need for this function as all arches have to implement kvm_arch_create_vcpu_debugfs() no matter what. A #define symbol let us actually simplify the code. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* KVM: s390: Use kvm_vcpu_wake_up in kvm_s390_vcpu_wakeupWanpeng Li2019-07-201-20/+3Star
| | | | | | | | | | | Use kvm_vcpu_wake_up() in kvm_s390_vcpu_wakeup(). Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Wanpeng Li <wanpengli@tencent.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* KVM: Boost vCPUs that are delivering interruptsWanpeng Li2019-07-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Inspired by commit 9cac38dd5d (KVM/s390: Set preempted flag during vcpu wakeup and interrupt delivery), we want to also boost not just lock holders but also vCPUs that are delivering interrupts. Most smp_call_function_many calls are synchronous, so the IPI target vCPUs are also good yield candidates. This patch introduces vcpu->ready to boost vCPUs during wakeup and interrupt delivery time; unlike s390 we do not reuse vcpu->preempted so that voluntarily preempted vCPUs are taken into account by kvm_vcpu_on_spin, but vmx_vcpu_pi_put is not affected (VT-d PI handles voluntary preemption separately, in pi_pre_block). Testing on 80 HT 2 socket Xeon Skylake server, with 80 vCPUs VM 80GB RAM: ebizzy -M vanilla boosting improved 1VM 21443 23520 9% 2VM 2800 8000 180% 3VM 1800 3100 72% Testing on my Haswell desktop 8 HT, with 8 vCPUs VM 8GB RAM, two VMs, one running ebizzy -M, the other running 'stress --cpu 2': w/ boosting + w/o pv sched yield(vanilla) vanilla boosting improved 1570 4000 155% w/ boosting + w/ pv sched yield(vanilla) vanilla boosting improved 1844 5157 179% w/o boosting, perf top in VM: 72.33% [kernel] [k] smp_call_function_many 4.22% [kernel] [k] call_function_i 3.71% [kernel] [k] async_page_fault w/ boosting, perf top in VM: 38.43% [kernel] [k] smp_call_function_many 6.31% [kernel] [k] async_page_fault 6.13% libc-2.23.so [.] __memcpy_avx_unaligned 4.88% [kernel] [k] call_function_interrupt Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Paul Mackerras <paulus@ozlabs.org> Cc: Marc Zyngier <maz@kernel.org> Signed-off-by: Wanpeng Li <wanpengli@tencent.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds2019-07-131-2/+7
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull KVM updates from Paolo Bonzini: "ARM: - support for chained PMU counters in guests - improved SError handling - handle Neoverse N1 erratum #1349291 - allow side-channel mitigation status to be migrated - standardise most AArch64 system register accesses to msr_s/mrs_s - fix host MPIDR corruption on 32bit - selftests ckleanups x86: - PMU event {white,black}listing - ability for the guest to disable host-side interrupt polling - fixes for enlightened VMCS (Hyper-V pv nested virtualization), - new hypercall to yield to IPI target - support for passing cstate MSRs through to the guest - lots of cleanups and optimizations Generic: - Some txt->rST conversions for the documentation" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (128 commits) Documentation: virtual: Add toctree hooks Documentation: kvm: Convert cpuid.txt to .rst Documentation: virtual: Convert paravirt_ops.txt to .rst KVM: x86: Unconditionally enable irqs in guest context KVM: x86: PMU Event Filter kvm: x86: Fix -Wmissing-prototypes warnings KVM: Properly check if "page" is valid in kvm_vcpu_unmap KVM: arm/arm64: Initialise host's MPIDRs by reading the actual register KVM: LAPIC: Retry tune per-vCPU timer_advance_ns if adaptive tuning goes insane kvm: LAPIC: write down valid APIC registers KVM: arm64: Migrate _elx sysreg accessors to msr_s/mrs_s KVM: doc: Add API documentation on the KVM_REG_ARM_WORKAROUNDS register KVM: arm/arm64: Add save/restore support for firmware workaround state arm64: KVM: Propagate full Spectre v2 workaround state to KVM guests KVM: arm/arm64: Support chained PMU counters KVM: arm/arm64: Remove pmc->bitmask KVM: arm/arm64: Re-create event when setting counter value KVM: arm/arm64: Extract duplicated code to own function KVM: arm/arm64: Rename kvm_pmu_{enable/disable}_counter functions KVM: LAPIC: ARBPRI is a reserved register for x2APIC ...
| * kvm: Convert kvm_lock to a mutexJunaid Shahid2019-06-051-2/+2
| | | | | | | | | | | | | | | | | | It doesn't seem as if there is any particular need for kvm_lock to be a spinlock, so convert the lock to a mutex so that sleepable functions (in particular cond_resched()) can be called while holding it. Signed-off-by: Junaid Shahid <junaids@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| * KVM: Directly return result from kvm_arch_check_processor_compat()Sean Christopherson2019-06-041-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a wrapper to invoke kvm_arch_check_processor_compat() so that the boilerplate ugliness of checking virtualization support on all CPUs is hidden from the arch specific code. x86's implementation in particular is quite heinous, as it unnecessarily propagates the out-param pattern into kvm_x86_ops. While the x86 specific issue could be resolved solely by changing kvm_x86_ops, make the change for all architectures as returning a value directly is prettier and technically more robust, e.g. s390 doesn't set the out param, which could lead to subtle breakage in the (highly unlikely) scenario where the out-param was not pre-initialized by the caller. Opportunistically annotate svm_check_processor_compat() with __init. Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* | s390: ap: kvm: Enable PQAP/AQIC facility for the guestPierre Morel2019-07-021-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | AP Queue Interruption Control (AQIC) facility gives the guest the possibility to control interruption for the Cryptographic Adjunct Processor queues. Signed-off-by: Pierre Morel <pmorel@linux.ibm.com> Reviewed-by: Tony Krowiak <akrowiak@linux.ibm.com> Acked-by: Harald Freudenberger <freude@linux.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Halil Pasic <pasic@linux.ibm.com> [ Modified while picking: we may not expose STFLE facility 65 unconditionally because AIV is a pre-requirement.] Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
* | s390: ap: kvm: add PQAP interception for AQICPierre Morel2019-07-021-0/+86
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We prepare the interception of the PQAP/AQIC instruction for the case the AQIC facility is enabled in the guest. First of all we do not want to change existing behavior when intercepting AP instructions without the SIE allowing the guest to use AP instructions. In this patch we only handle the AQIC interception allowed by facility 65 which will be enabled when the complete interception infrastructure will be present. We add a callback inside the KVM arch structure for s390 for a VFIO driver to handle a specific response to the PQAP instruction with the AQIC command and only this command. But we want to be able to return a correct answer to the guest even there is no VFIO AP driver in the kernel. Therefor, we inject the correct exceptions from inside KVM for the case the callback is not initialized, which happens when the vfio_ap driver is not loaded. We do consider the responsibility of the driver to always initialize the PQAP callback if it defines queues by initializing the CRYCB for a guest. If the callback has been setup we call it. If not we setup an answer considering that no queue is available for the guest when no callback has been setup. Signed-off-by: Pierre Morel <pmorel@linux.ibm.com> Reviewed-by: Tony Krowiak <akrowiak@linux.ibm.com> Acked-by: Harald Freudenberger <freude@linux.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Halil Pasic <pasic@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
* KVM: s390: Do not report unusabled IDs via KVM_CAP_MAX_VCPU_IDThomas Huth2019-05-281-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | KVM_CAP_MAX_VCPU_ID is currently always reporting KVM_MAX_VCPU_ID on all architectures. However, on s390x, the amount of usable CPUs is determined during runtime - it is depending on the features of the machine the code is running on. Since we are using the vcpu_id as an index into the SCA structures that are defined by the hardware (see e.g. the sca_add_vcpu() function), it is not only the amount of CPUs that is limited by the hard- ware, but also the range of IDs that we can use. Thus KVM_CAP_MAX_VCPU_ID must be determined during runtime on s390x, too. So the handling of KVM_CAP_MAX_VCPU_ID has to be moved from the common code into the architecture specific code, and on s390x we have to return the same value here as for KVM_CAP_MAX_VCPUS. This problem has been discovered with the kvm_create_max_vcpus selftest. With this change applied, the selftest now passes on s390x, too. Reviewed-by: Andrew Jones <drjones@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com> Message-Id: <20190523164309.13345-9-thuth@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* KVM: s390: fix memory slot handling for KVM_SET_USER_MEMORY_REGIONChristian Borntraeger2019-05-241-14/+21
| | | | | | | | | | kselftests exposed a problem in the s390 handling for memory slots. Right now we only do proper memory slot handling for creation of new memory slots. Neither MOVE, nor DELETION are handled properly. Let us implement those. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* KVM: s390: fix typo in parameter descriptionWei Yongjun2019-05-201-1/+1
| | | | | | | | | | | Fix typo in parameter description. Fixes: 8b905d28ee17 ("KVM: s390: provide kvm_arch_no_poll function") Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Message-Id: <20190504065145.53665-1-weiyongjun1@huawei.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds2019-05-174-10/+135
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull KVM updates from Paolo Bonzini: "ARM: - support for SVE and Pointer Authentication in guests - PMU improvements POWER: - support for direct access to the POWER9 XIVE interrupt controller - memory and performance optimizations x86: - support for accessing memory not backed by struct page - fixes and refactoring Generic: - dirty page tracking improvements" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (155 commits) kvm: fix compilation on aarch64 Revert "KVM: nVMX: Expose RDPMC-exiting only when guest supports PMU" kvm: x86: Fix L1TF mitigation for shadow MMU KVM: nVMX: Disable intercept for FS/GS base MSRs in vmcs02 when possible KVM: PPC: Book3S: Remove useless checks in 'release' method of KVM device KVM: PPC: Book3S HV: XIVE: Fix spelling mistake "acessing" -> "accessing" KVM: PPC: Book3S HV: Make sure to load LPID for radix VCPUs kvm: nVMX: Set nested_run_pending in vmx_set_nested_state after checks complete tests: kvm: Add tests for KVM_SET_NESTED_STATE KVM: nVMX: KVM_SET_NESTED_STATE - Tear down old EVMCS state before setting new state tests: kvm: Add tests for KVM_CAP_MAX_VCPUS and KVM_CAP_MAX_CPU_ID tests: kvm: Add tests to .gitignore KVM: Introduce KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2 KVM: Fix kvm_clear_dirty_log_protect off-by-(minus-)one KVM: Fix the bitmap range to copy during clear dirty KVM: arm64: Fix ptrauth ID register masking logic KVM: x86: use direct accessors for RIP and RSP KVM: VMX: Use accessors for GPRs outside of dedicated caching logic KVM: x86: Omit caching logic for always-available GPRs kvm, x86: Properly check whether a pfn is an MMIO or not ...
| * Merge tag 'kvm-s390-next-5.2-1' of ↵Paolo Bonzini2019-04-304-7/+135
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD KVM: s390: Features and fixes for 5.2 - VSIE crypto fixes - new guest features for gen15 - disable halt polling for nested virtualization with overcommit
| | * KVM: s390: vsie: Return correct values for Invalid CRYCB formatPierre Morel2019-04-291-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Let's use the correct validity number. Fixes: 56019f9aca22 ("KVM: s390: vsie: Allow CRYCB FORMAT-2") Signed-off-by: Pierre Morel <pmorel@linux.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Message-Id: <1556269201-22918-1-git-send-email-pmorel@linux.ibm.com> Acked-by: David Hildenbrand <david@redhat.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
| | * KVM: s390: vsie: Do not shadow CRYCB when no AP and no keysPierre Morel2019-04-291-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When the guest do not have AP instructions nor Key management we should return without shadowing the CRYCB. We did not check correctly in the past. Fixes: b10bd9a256ae ("s390: vsie: Use effective CRYCBD.31 to check CRYCBD validity") Fixes: 6ee74098201b ("KVM: s390: vsie: allow CRYCB FORMAT-0") Signed-off-by: Pierre Morel <pmorel@linux.ibm.com> Reported-by: Christian Borntraeger <borntraeger@de.ibm.com> Message-Id: <1556269010-22258-1-git-send-email-pmorel@linux.ibm.com> Acked-by: David Hildenbrand <david@redhat.com> Tested-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
| | * KVM: s390: provide kvm_arch_no_poll functionChristian Borntraeger2019-04-262-0/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We do track the current steal time of the host CPUs. Let us use this value to disable halt polling if the steal time goes beyond a configured value. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
| | * KVM: s390: enable MSA9 keywrapping functions depending on cpu modelChristian Borntraeger2019-04-252-2/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of adding a new machine option to disable/enable the keywrapping options of pckmo (like for AES and DEA) we can now use the CPU model to decide. As ECC is also wrapped with the AES key we need that to be enabled. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com>
| | * KVM: s390: add deflate conversion facilty to cpu modelChristian Borntraeger2019-04-251-0/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This enables stfle.151 and adds the subfunctions for DFLTCC. Bit 151 is added to the list of facilities that will be enabled when there is no cpu model involved as DFLTCC requires no additional handling from userspace, e.g. for migration. Please note that a cpu model enabled user space can and will have the final decision on the facility bits for a guests. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Collin Walling <walling@linux.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com>
| | * KVM: s390: add enhanced sort facilty to cpu modelChristian Borntraeger2019-04-181-0/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This enables stfle.150 and adds the subfunctions for SORTL. Bit 150 is added to the list of facilities that will be enabled when there is no cpu model involved as sortl requires no additional handling from userspace, e.g. for migration. Please note that a cpu model enabled user space can and will have the final decision on the facility bits for a guests. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Collin Walling <walling@linux.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com>
| | * KVM: s390: provide query function for instructions returning 32 byteChristian Borntraeger2019-04-181-0/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some of the new features have a 32byte response for the query function. Provide a new wrapper similar to __cpacf_query. We might want to factor this out if other users come up, as of today there is none. So let us keep the function within KVM. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Collin Walling <walling@linux.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com>
| | * KVM: s390: add MSA9 to cpumodelChristian Borntraeger2019-04-181-0/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This enables stfle.155 and adds the subfunctions for KDSA. Bit 155 is added to the list of facilities that will be enabled when there is no cpu model involved as MSA9 requires no additional handling from userspace, e.g. for migration. Please note that a cpu model enabled user space can and will have the final decision on the facility bits for a guests. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Janosch Frank <frankja@linux.ibm.com> Reviewed-by: Collin Walling <walling@linux.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com>
| | * KVM: s390: add vector BCD enhancements facility to cpumodelChristian Borntraeger2019-04-181-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If vector support is enabled, the vector BCD enhancements facility might also be enabled. We can directly forward this facility to the guest if available and VX is requested by user space. Please note that user space can and will have the final decision on the facility bits for a guests. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Janosch Frank <frankja@linux.ibm.com> Reviewed-by: Collin Walling <walling@linux.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com>
| | * KVM: s390: add vector enhancements facility 2 to cpumodelChristian Borntraeger2019-04-181-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If vector support is enabled, the vector enhancements facility 2 might also be enabled. We can directly forward this facility to the guest if available and VX is requested by user space. Please note that user space can and will have the final decision on the facility bits for a guests. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Janosch Frank <frankja@linux.ibm.com> Reviewed-by: Collin Walling <walling@linux.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com>
| | * KVM: s390: Fix potential spectre warningsEric Farman2019-04-181-2/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix some warnings from smatch: arch/s390/kvm/interrupt.c:2310 get_io_adapter() warn: potential spectre issue 'kvm->arch.adapters' [r] (local cap) arch/s390/kvm/interrupt.c:2341 register_io_adapter() warn: potential spectre issue 'dev->kvm->arch.adapters' [w] Signed-off-by: Eric Farman <farman@linux.ibm.com> Message-Id: <20190417005414.47801-1-farman@linux.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
| * | kvm: move KVM_CAP_NR_MEMSLOTS to common codePaolo Bonzini2019-04-161-3/+0Star
| |/ | | | | | | | | | | | | | | All architectures except MIPS were defining it in the same way, and memory slots are handled entirely by common code so there is no point in keeping the definition per-architecture. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* | mm/gup: change GUP fast to use flags rather than a write 'bool'Ira Weiny2019-05-141-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To facilitate additional options to get_user_pages_fast() change the singular write parameter to be gup_flags. This patch does not change any functionality. New functionality will follow in subsequent patches. Some of the get_user_pages_fast() call sites were unchanged because they already passed FOLL_WRITE or 0 for the write parameter. NOTE: It was suggested to change the ordering of the get_user_pages_fast() arguments to ensure that callers were converted. This breaks the current GUP call site convention of having the returned pages be the final parameter. So the suggestion was rejected. Link: http://lkml.kernel.org/r/20190328084422.29911-4-ira.weiny@intel.com Link: http://lkml.kernel.org/r/20190317183438.2057-4-ira.weiny@intel.com Signed-off-by: Ira Weiny <ira.weiny@intel.com> Reviewed-by: Mike Marshall <hubcap@omnibond.com> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Dan Williams <dan.j.williams@intel.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Hogan <jhogan@kernel.org> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: John Hubbard <jhubbard@nvidia.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Rich Felker <dalias@libc.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge tag 'pidfd-v5.2-rc1' of ↵Linus Torvalds2019-05-071-1/+0Star
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux Pull pidfd updates from Christian Brauner: "This patchset makes it possible to retrieve pidfds at process creation time by introducing the new flag CLONE_PIDFD to the clone() system call. Linus originally suggested to implement this as a new flag to clone() instead of making it a separate system call. After a thorough review from Oleg CLONE_PIDFD returns pidfds in the parent_tidptr argument. This means we can give back the associated pid and the pidfd at the same time. Access to process metadata information thus becomes rather trivial. As has been agreed, CLONE_PIDFD creates file descriptors based on anonymous inodes similar to the new mount api. They are made unconditional by this patchset as they are now needed by core kernel code (vfs, pidfd) even more than they already were before (timerfd, signalfd, io_uring, epoll etc.). The core patchset is rather small. The bulky looking changelist is caused by David's very simple changes to Kconfig to make anon inodes unconditional. A pidfd comes with additional information in fdinfo if the kernel supports procfs. The fdinfo file contains the pid of the process in the callers pid namespace in the same format as the procfs status file, i.e. "Pid:\t%d". To remove worries about missing metadata access this patchset comes with a sample/test program that illustrates how a combination of CLONE_PIDFD and pidfd_send_signal() can be used to gain race-free access to process metadata through /proc/<pid>. Further work based on this patchset has been done by Joel. His work makes pidfds pollable. It finished too late for this merge window. I would prefer to have it sitting in linux-next for a while and send it for inclusion during the 5.3 merge window" * tag 'pidfd-v5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux: samples: show race-free pidfd metadata access signal: support CLONE_PIDFD with pidfd_send_signal clone: add CLONE_PIDFD Make anon_inodes unconditional
| * | Make anon_inodes unconditionalDavid Howells2019-04-191-1/+0Star
| |/ | | | | | | | | | | | | | | | | | | Make the anon_inodes facility unconditional so that it can be used by core VFS code and pidfd code. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> [christian@brauner.io: adapt commit message to mention pidfds] Signed-off-by: Christian Brauner <christian@brauner.io>
* / s390/airq: recognize directed interruptsSebastian Ott2019-04-291-1/+1
|/ | | | | | | | Add an extra parameter for airq handlers to recognize floating vs. directed interrupts. Signed-off-by: Sebastian Ott <sebott@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds2019-03-153-59/+566
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull KVM updates from Paolo Bonzini: "ARM: - some cleanups - direct physical timer assignment - cache sanitization for 32-bit guests s390: - interrupt cleanup - introduction of the Guest Information Block - preparation for processor subfunctions in cpu models PPC: - bug fixes and improvements, especially related to machine checks and protection keys x86: - many, many cleanups, including removing a bunch of MMU code for unnecessary optimizations - AVIC fixes Generic: - memcg accounting" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (147 commits) kvm: vmx: fix formatting of a comment KVM: doc: Document the life cycle of a VM and its resources MAINTAINERS: Add KVM selftests to existing KVM entry Revert "KVM/MMU: Flush tlb directly in the kvm_zap_gfn_range()" KVM: PPC: Book3S: Add count cache flush parameters to kvmppc_get_cpu_char() KVM: PPC: Fix compilation when KVM is not enabled KVM: Minor cleanups for kvm_main.c KVM: s390: add debug logging for cpu model subfunctions KVM: s390: implement subfunction processor calls arm64: KVM: Fix architecturally invalid reset value for FPEXC32_EL2 KVM: arm/arm64: Remove unused timer variable KVM: PPC: Book3S: Improve KVM reference counting KVM: PPC: Book3S HV: Fix build failure without IOMMU support Revert "KVM: Eliminate extra function calls in kvm_get_dirty_log_protect()" x86: kvmguest: use TSC clocksource if invariant TSC is exposed KVM: Never start grow vCPU halt_poll_ns from value below halt_poll_ns_grow_start KVM: Expose the initial start value in grow_halt_poll_ns() as a module parameter KVM: grow_halt_poll_ns() should never shrink vCPU halt_poll_ns KVM: x86/mmu: Consolidate kvm_mmu_zap_all() and kvm_mmu_zap_mmio_sptes() KVM: x86/mmu: WARN if zapping a MMIO spte results in zapping children ...
| * KVM: s390: add debug logging for cpu model subfunctionsChristian Borntraeger2019-02-221-0/+136
| | | | | | | | | | | | | | | | | | | | | | As userspace can now get/set the subfunctions we want to trace those. This will allow to also check QEMUs cpu model vs. what the real hardware provides. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Janosch Frank <frankja@linux.vnet.ibm.com>
| * KVM: s390: implement subfunction processor callsChristian Borntraeger2019-02-221-13/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | While we will not implement interception for query functions yet, we can and should disable functions that have a control bit based on the given CPU model. Let us start with enabling the subfunction interface. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Janosch Frank <frankja@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
| * KVM: s390: fix possible null pointer dereference in pending_irqs()Michael Mueller2019-02-051-3/+7
| | | | | | | | | | | | | | | | | | | | | | | | Assure a GISA is in use before accessing the IPM to avoid a null pointer dereference issue. Signed-off-by: Michael Mueller <mimu@linux.ibm.com> Reported-by: Halil Pasic <pasic@linux.ibm.com> Reviewed-by: Pierre Morel <pmorel@linux.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Message-Id: <20190131085247.13826-16-mimu@linux.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
| * KVM: s390: start using the GIBMichael Mueller2019-02-051-0/+7
| | | | | | | | | | | | | | | | | | | | By initializing the GIB, it will be used by the kvm host. Signed-off-by: Michael Mueller <mimu@linux.ibm.com> Reviewed-by: Pierre Morel <pmorel@linux.ibm.com> Reviewed-by: Halil Pasic <pasic@linux.ibm.com> Message-Id: <20190131085247.13826-15-mimu@linux.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
| * KVM: s390: add gib_alert_irq_handler()Michael Mueller2019-02-052-2/+169
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The patch implements a handler for GIB alert interruptions on the host. Its task is to alert guests that interrupts are pending for them. A GIB alert interrupt statistic counter is added as well: $ cat /proc/interrupts CPU0 CPU1 ... GAL: 23 37 [I/O] GIB Alert ... Signed-off-by: Michael Mueller <mimu@linux.ibm.com> Acked-by: Halil Pasic <pasic@linux.ibm.com> Reviewed-by: Pierre Morel <pmorel@linux.ibm.com> Message-Id: <20190131085247.13826-14-mimu@linux.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
| * KVM: s390: kvm_s390_gisa_clear() now clears the IPM onlyMichael Mueller2019-02-051-3/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | Function kvm_s390_gisa_clear() now clears the Interruption Pending Mask of the GISA asap. If the GISA is in the alert list at this time it stays in the list but is removed by process_gib_alert_list(). Signed-off-by: Michael Mueller <mimu@linux.ibm.com> Acked-by: Halil Pasic <pasic@linux.ibm.com> Reviewed-by: Pierre Morel <pmorel@linux.ibm.com> Message-Id: <20190131085247.13826-13-mimu@linux.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
| * KVM: s390: add functions to (un)register GISC with GISAMichael Mueller2019-02-051-0/+112
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add the Interruption Alert Mask (IAM) to the architecture specific kvm struct. This mask in the GISA is used to define for which ISC a GIB alert will be issued. The functions kvm_s390_gisc_register() and kvm_s390_gisc_unregister() are used to (un)register a GISC (guest ISC) with a virtual machine and its GISA. Upon successful completion, kvm_s390_gisc_register() returns the ISC to be used for GIB alert interruptions. A negative return code indicates an error during registration. Theses functions will be used by other adapter types like AP and PCI to request pass-through interruption support. Signed-off-by: Michael Mueller <mimu@linux.ibm.com> Acked-by: Pierre Morel <pmorel@linux.ibm.com> Acked-by: Halil Pasic <pasic@linux.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Message-Id: <20190131085247.13826-12-mimu@linux.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
| * KVM: s390: add kvm reference to struct sie_page2Michael Mueller2019-02-051-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Adding the kvm reference to struct sie_page2 will allow to determine the kvm a given gisa belongs to: container_of(gisa, struct sie_page2, gisa)->kvm This functionality will be required to process a gisa in gib alert interruption context. Signed-off-by: Michael Mueller <mimu@linux.ibm.com> Reviewed-by: Pierre Morel <pmorel@linux.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Halil Pasic <pasic@linux.ibm.com> Message-Id: <20190131085247.13826-11-mimu@linux.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
| * KVM: s390: add the GIB and its related life-cyle functionsMichael Mueller2019-02-053-0/+46
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Guest Information Block (GIB) links the GISA of all guests that have adapter interrupts pending. These interrupts cannot be delivered because all vcpus of these guests are currently in WAIT state or have masked the respective Interruption Sub Class (ISC). If enabled, a GIB alert is issued on the host to schedule these guests to run suitable vcpus to consume the pending interruptions. This mechanism allows to process adapter interrupts for currently not running guests. The GIB is created during host initialization and associated with the Adapter Interruption Facility in case an Adapter Interruption Virtualization Facility is available. The GIB initialization and thus the activation of the related code will be done in an upcoming patch of this series. Signed-off-by: Michael Mueller <mimu@linux.ibm.com> Reviewed-by: Janosch Frank <frankja@linux.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Pierre Morel <pmorel@linux.ibm.com> Acked-by: Halil Pasic <pasic@linux.ibm.com> Message-Id: <20190131085247.13826-10-mimu@linux.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
| * KVM: s390: introduce struct kvm_s390_gisa_interruptMichael Mueller2019-02-052-23/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Use this struct analog to the kvm interruption structs for kvm emulated floating and local interruptions. GIB handling will add further fields to this structure as required. Signed-off-by: Michael Mueller <mimu@linux.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Halil Pasic <pasic@linux.ibm.com> Message-Id: <20190131085247.13826-8-mimu@linux.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
| * KVM: s390: remove kvm_s390_ from gisa static inline functionsMichael Mueller2019-02-051-14/+13Star
| | | | | | | | | | | | | | | | | | | | | | | | This will shorten the length of code lines. All GISA related static inline functions are local to interrupt.c. Signed-off-by: Michael Mueller <mimu@linux.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Pierre Morel <pmorel@linux.ibm.com> Reviewed-by: Halil Pasic <pasic@linux.ibm.com> Message-Id: <20190131085247.13826-7-mimu@linux.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
| * KVM: s390: use pending_irqs_no_gisa() where appropriateMichael Mueller2019-02-051-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | Interruption types that are not represented in GISA shall use pending_irqs_no_gisa() to test pending interruptions. Signed-off-by: Michael Mueller <mimu@linux.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Pierre Morel <pmorel@linux.ibm.com> Reviewed-by: Halil Pasic <pasic@linux.ibm.com> Message-Id: <20190131085247.13826-6-mimu@linux.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
| * KVM: s390: coding style kvm_s390_gisa_init/clear()Michael Mueller2019-02-051-10/+10
| | | | | | | | | | | | | | | | | | | | | | | | The change helps to reduce line length and increases code readability. Signed-off-by: Michael Mueller <mimu@linux.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Pierre Morel <pmorel@linux.ibm.com> Reviewed-by: Halil Pasic <pasic@linux.ibm.com> Message-Id: <20190131085247.13826-5-mimu@linux.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
| * KVM: s390: move bitmap idle_mask into arch struct top levelMichael Mueller2019-02-052-7/+6Star
| | | | | | | | | | | | | | | | | | | | | | | | | | The vcpu idle_mask state is used by but not specific to the emulated floating interruptions. The state is relevant to gisa related interruptions as well. Signed-off-by: Michael Mueller <mimu@linux.ibm.com> Reviewed-by: Pierre Morel <pmorel@linux.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Acked-by: Halil Pasic <pasic@linux.ibm.com> Message-Id: <20190131085247.13826-4-mimu@linux.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
| * KVM: s390: make bitmap declaration consistentMichael Mueller2019-02-051-1/+1
| | | | | | | | | | | | | | | | | | | | Use a consistent bitmap declaration throughout the code. Signed-off-by: Michael Mueller <mimu@linux.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Halil Pasic <pasic@linux.ibm.com> Message-Id: <20190131085247.13826-3-mimu@linux.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
| * KVM: s390: drop obsolete else pathMichael Mueller2019-02-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | The explicit else path specified in set_intercept_indicators_io is not required as the function returns in case the first branch is taken anyway. Signed-off-by: Michael Mueller <mimu@linux.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Halil Pasic <pasic@linux.ibm.com> Message-Id: <20190131085247.13826-2-mimu@linux.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
| * KVM: s390: clarify kvm related kernel messageMichael Mueller2019-02-051-3/+3
| | | | | | | | | | | | | | | | | | As suggested by our ID dept. here are some kernel message updates. Signed-off-by: Michael Mueller <mimu@linux.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* | s390: vsie: Use effective CRYCBD.31 to check CRYCBD validityPierre Morel2019-02-111-1/+1
|/ | | | | | | | | | | | | | | | | | | | | | | When facility.76 MSAX3 is present for the guest we must issue a validity interception if the CRYCBD is not valid. The bit CRYCBD.31 is an effective field and tested at each guest level and has for effect to mask the facility.76 It follows that if CRYCBD.31 is clear and AP is not in use we do not have to test the CRYCBD validatity even if facility.76 is present in the host. Fixes: 6ee74098201b ("KVM: s390: vsie: allow CRYCB FORMAT-0") Cc: stable@vger.kernel.org Signed-off-by: Pierre Morel <pmorel@linux.ibm.com> Reported-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Acked-by: David Hildenbrand <david@redhat.com> Acked-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Message-Id: <1549876849-32680-1-git-send-email-pmorel@linux.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
* Merge tag 'kconfig-v4.21' of ↵Linus Torvalds2018-12-291-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kconfig updates from Masahiro Yamada: - support -y option for merge_config.sh to avoid downgrading =y to =m - remove S_OTHER symbol type, and touch include/config/*.h files correctly - fix file name and line number in lexer warnings - fix memory leak when EOF is encountered in quotation - resolve all shift/reduce conflicts of the parser - warn no new line at end of file - make 'source' statement more strict to take only string literal - rewrite the lexer and remove the keyword lookup table - convert to SPDX License Identifier - compile C files independently instead of including them from zconf.y - fix various warnings of gconfig - misc cleanups * tag 'kconfig-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (39 commits) kconfig: surround dbg_sym_flags with #ifdef DEBUG to fix gconf warning kconfig: split images.c out of qconf.cc/gconf.c to fix gconf warnings kconfig: add static qualifiers to fix gconf warnings kconfig: split the lexer out of zconf.y kconfig: split some C files out of zconf.y kconfig: convert to SPDX License Identifier kconfig: remove keyword lookup table entirely kconfig: update current_pos in the second lexer kconfig: switch to ASSIGN_VAL state in the second lexer kconfig: stop associating kconf_id with yylval kconfig: refactor end token rules kconfig: stop supporting '.' and '/' in unquoted words treewide: surround Kconfig file paths with double quotes microblaze: surround string default in Kconfig with double quotes kconfig: use T_WORD instead of T_VARIABLE for variables kconfig: use specific tokens instead of T_ASSIGN for assignments kconfig: refactor scanning and parsing "option" properties kconfig: use distinct tokens for type and default properties kconfig: remove redundant token defines kconfig: rename depends_list to comment_option_list ...
| * treewide: surround Kconfig file paths with double quotesMasahiro Yamada2018-12-211-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Kconfig lexer supports special characters such as '.' and '/' in the parameter context. In my understanding, the reason is just to support bare file paths in the source statement. I do not see a good reason to complicate Kconfig for the room of ambiguity. The majority of code already surrounds file paths with double quotes, and it makes sense since file paths are constant string literals. Make it treewide consistent now. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Wolfram Sang <wsa@the-dreams.de> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Ingo Molnar <mingo@kernel.org>
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-06-06 21:13:35 +0200