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2019-09-24KVM/Hyper-V: Add new KVM capability KVM_CAP_HYPERV_DIRECT_TLBFLUSHTianyu Lan
Hyper-V direct tlb flush function should be enabled for guest that only uses Hyper-V hypercall. User space hypervisor(e.g, Qemu) can disable KVM identification in CPUID and just exposes Hyper-V identification to make sure the precondition. Add new KVM capability KVM_CAP_ HYPERV_DIRECT_TLBFLUSH for user space to enable Hyper-V direct tlb function and this function is default to be disabled in KVM. Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-09-11Merge tag 'kvm-s390-next-5.4-1' of ↵Paolo Bonzini
git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD * More selftests * Improved KVM_S390_MEM_OP ioctl input checking * Add kvm_valid_regs and kvm_dirty_regs invalid bit checking
2019-09-10doc: kvm: Fix return description of KVM_SET_MSRSXiaoyao Li
Userspace can use ioctl KVM_SET_MSRS to update a set of MSRs of guest. This ioctl set specified MSRs one by one. If it fails to set an MSR, e.g., due to setting reserved bits, the MSR is not supported/emulated by KVM, etc..., it stops processing the MSR list and returns the number of MSRs have been set successfully. Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-09-10Merge tag 'kvmarm-5.4' of ↵Paolo Bonzini
git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD KVM/arm updates for 5.4 - New ITS translation cache - Allow up to 512 CPUs to be supported with GICv3 (for real this time) - Now call kvm_arch_vcpu_blocking early in the blocking sequence - Tidy-up device mappings in S2 when DIC is available - Clean icache invalidation on VMID rollover - General cleanup
2019-09-10Merge tag 'kvm-ppc-next-5.4-1' of ↵Paolo Bonzini
git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into HEAD PPC KVM update for 5.4 - Some prep for extending the uses of the rmap array - Various minor fixes - Commits from the powerpc topic/ppc-kvm branch, which fix a problem with interrupts arriving after free_irq, causing host hangs and crashes.
2019-09-09KVM: arm/arm64: vgic: Allow more than 256 vcpus for KVM_IRQ_LINEMarc Zyngier
While parts of the VGIC support a large number of vcpus (we bravely allow up to 512), other parts are more limited. One of these limits is visible in the KVM_IRQ_LINE ioctl, which only allows 256 vcpus to be signalled when using the CPU or PPI types. Unfortunately, we've cornered ourselves badly by allocating all the bits in the irq field. Since the irq_type subfield (8 bit wide) is currently only taking the values 0, 1 and 2 (and we have been careful not to allow anything else), let's reduce this field to only 4 bits, and allocate the remaining 4 bits to a vcpu2_index, which acts as a multiplier: vcpu_id = 256 * vcpu2_index + vcpu_index With that, and a new capability (KVM_CAP_ARM_IRQ_LINE_LAYOUT_2) allowing this to be discovered, it becomes possible to inject PPIs to up to 4096 vcpus. But please just don't. Whilst we're there, add a clarification about the use of KVM_IRQ_LINE on arm, which is not completely conditionned by KVM_CAP_IRQCHIP. Reported-by: Zenghui Yu <yuzenghui@huawei.com> Reviewed-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Zenghui Yu <yuzenghui@huawei.com> Signed-off-by: Marc Zyngier <maz@kernel.org>
2019-08-29KVM: s390: improve documentation for S390_MEM_OPCornelia Huck
Explicitly specify the valid ranges for size and ar, and reword buf requirements a bit. Signed-off-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com> Link: https://lkml.kernel.org/r/20190829124746.28665-1-cohuck@redhat.com Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2019-08-22KVM: x86: Rename access permissions cache member in struct kvm_vcpu_archSean Christopherson
Rename "access" to "mmio_access" to match the other MMIO cache members and to make it more obvious that it's tracking the access permissions for the MMIO cache. Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-07-26Merge tag 'docs-5.3-1' of git://git.lwn.net/linuxLinus Torvalds
Pull documentation fixes from Jonathan Corbet: "This is mostly a set of follow-on fixes from Mauro fixing various fallout from the massive RST conversion; a few other small fixes as well" * tag 'docs-5.3-1' of git://git.lwn.net/linux: (21 commits) docs: phy: Drop duplicate 'be made' doc:it_IT: translations in process/ docs/vm: transhuge: fix typo in madvise reference doc:it_IT: rephrase statement doc:it_IT: align translation to mainline docs: load_config.py: ensure subdirs end with "/" docs: virtual: add it to the documentation body docs: remove extra conf.py files docs: load_config.py: avoid needing a conf.py just due to LaTeX docs scripts/sphinx-pre-install: seek for Noto CJK fonts for pdf output scripts/sphinx-pre-install: cleanup Gentoo checks scripts/sphinx-pre-install: fix latexmk dependencies scripts/sphinx-pre-install: don't use LaTeX with CentOS 7 scripts/sphinx-pre-install: fix script for RHEL/CentOS docs: conf.py: only use CJK if the font is available docs: conf.py: add CJK package needed by translations docs: pdf: add all Documentation/*/index.rst to PDF output docs: fix broken doc references due to renames docs: power: add it to to the main documentation index docs: powerpc: convert docs to ReST and rename to *.rst ...
2019-07-24Documentation: move Documentation/virtual to Documentation/virtChristoph Hellwig
Renaming docs seems to be en vogue at the moment, so fix on of the grossly misnamed directories. We usually never use "virtual" as a shortcut for virtualization in the kernel, but always virt, as seen in the virt/ top-level directory. Fix up the documentation to match that. Fixes: ed16648eb5b8 ("Move kvm, uml, and lguest subdirectories under a common "virtual" directory, I.E:") Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>