linux-dev/arch/arm64/kvm/Kconfig, branch master

KVM: arm64: Move PROTECTED_NVHE_STACKTRACE around

2022-07-27T17:18:03Z

Make the dependency with EL2_DEBUG more obvious by moving the stacktrace configurtion *after* it. Signed-off-by: Marc Zyngier Reviewed-by: Kalesh Singh Tested-by: Kalesh Singh Reviewed-by: Oliver Upton Link: https://lore.kernel.org/r/20220727142906.1856759-2-maz@kernel.org

KVM: arm64: Add PROTECTED_NVHE_STACKTRACE Kconfig

2022-07-26T09:50:01Z

This can be used to disable stacktrace for the protected KVM nVHE hypervisor, in order to save on the associated memory usage. This option is disabled by default, since protected KVM is not widely used on platforms other than Android currently. Signed-off-by: Kalesh Singh Reviewed-by: Fuad Tabba Tested-by: Fuad Tabba Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20220726073750.3219117-13-kaleshsingh@google.com

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2022-01-16T14:15:14Z

Pull kvm updates from Paolo Bonzini: "RISCV: - Use common KVM implementation of MMU memory caches - SBI v0.2 support for Guest - Initial KVM selftests support - Fix to avoid spurious virtual interrupts after clearing hideleg CSR - Update email address for Anup and Atish ARM: - Simplification of the 'vcpu first run' by integrating it into KVM's 'pid change' flow - Refactoring of the FP and SVE state tracking, also leading to a simpler state and less shared data between EL1 and EL2 in the nVHE case - Tidy up the header file usage for the nvhe hyp object - New HYP unsharing mechanism, finally allowing pages to be unmapped from the Stage-1 EL2 page-tables - Various pKVM cleanups around refcounting and sharing - A couple of vgic fixes for bugs that would trigger once the vcpu xarray rework is merged, but not sooner - Add minimal support for ARMv8.7's PMU extension - Rework kvm_pgtable initialisation ahead of the NV work - New selftest for IRQ injection - Teach selftests about the lack of default IPA space and page sizes - Expand sysreg selftest to deal with Pointer Authentication - The usual bunch of cleanups and doc update s390: - fix sigp sense/start/stop/inconsistency - cleanups x86: - Clean up some function prototypes more - improved gfn_to_pfn_cache with proper invalidation, used by Xen emulation - add KVM_IRQ_ROUTING_XEN_EVTCHN and event channel delivery - completely remove potential TOC/TOU races in nested SVM consistency checks - update some PMCs on emulated instructions - Intel AMX support (joint work between Thomas and Intel) - large MMU cleanups - module parameter to disable PMU virtualization - cleanup register cache - first part of halt handling cleanups - Hyper-V enlightened MSR bitmap support for nested hypervisors Generic: - clean up Makefiles - introduce CONFIG_HAVE_KVM_DIRTY_RING - optimize memslot lookup using a tree - optimize vCPU array usage by converting to xarray" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (268 commits) x86/fpu: Fix inline prefix warnings selftest: kvm: Add amx selftest selftest: kvm: Move struct kvm_x86_state to header selftest: kvm: Reorder vcpu_load_state steps for AMX kvm: x86: Disable interception for IA32_XFD on demand x86/fpu: Provide fpu_sync_guest_vmexit_xfd_state() kvm: selftests: Add support for KVM_CAP_XSAVE2 kvm: x86: Add support for getting/setting expanded xstate buffer x86/fpu: Add uabi_size to guest_fpu kvm: x86: Add CPUID support for Intel AMX kvm: x86: Add XCR0 support for Intel AMX kvm: x86: Disable RDMSR interception of IA32_XFD_ERR kvm: x86: Emulate IA32_XFD_ERR for guest kvm: x86: Intercept #NM for saving IA32_XFD_ERR x86/fpu: Prepare xfd_err in struct fpu_guest kvm: x86: Add emulation for IA32_XFD x86/fpu: Provide fpu_update_guest_xfd() for IA32_XFD emulation kvm: x86: Enable dynamic xfeatures at KVM_SET_CPUID2 x86/fpu: Provide fpu_enable_guest_xfd_features() for KVM x86/fpu: Add guest support to xfd_enable_feature() ...

KVM: Use interval tree to do fast hva lookup in memslots

2021-12-08T09:24:32Z

The current memslots implementation only allows quick binary search by gfn, quick lookup by hva is not possible - the implementation has to do a linear scan of the whole memslots array, even though the operation being performed might apply just to a single memslot. This significantly hurts performance of per-hva operations with higher memslot counts. Since hva ranges can overlap between memslots an interval tree is needed for tracking them. [sean: handle interval tree updates in kvm_replace_memslot()] Signed-off-by: Maciej S. Szmigiero Message-Id:

perf: Force architectures to opt-in to guest callbacks

2021-11-17T13:49:08Z

Introduce GUEST_PERF_EVENTS and require architectures to select it to allow registering and using guest callbacks in perf. This will hopefully make it more difficult for new architectures to add useless "support" for guest callbacks, e.g. via copy+paste. Stubbing out the helpers has the happy bonus of avoiding a load of perf_guest_cbs when GUEST_PERF_EVENTS=n on arm64/x86. Signed-off-by: Sean Christopherson Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Paolo Bonzini Link: https://lore.kernel.org/r/20211111020738.2512932-9-seanjc@google.com

KVM: arm64: Depend on HAVE_KVM instead of OF

2021-10-11T09:08:50Z

Select HAVE_KVM at all times on arm64, as the OF requirement is always there (even in the case of an ACPI system, we still depend on some of the OF infrastructure), and won't fo away. No functional change intended. Signed-off-by: Sean Christopherson Acked-by: Will Deacon [maz: Drop the "HAVE_KVM if OF" dependency, as OF is always there on arm64, new commit message] Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20210921222231.518092-3-seanjc@google.com

KVM: arm64: Unconditionally include generic KVM's Kconfig

2021-10-11T09:04:59Z

Unconditionally "source" the generic KVM Kconfig instead of wrapping it with KVM=y. A future patch will select HAVE_KVM so that referencing HAVE_KVM in common kernel code doesn't break, and because KVM=y and HAVE_KVM=n is weird. Source the generic KVM Kconfig unconditionally so that HAVE_KVM and KVM don't end up with a circular dependency. Note, all but one of generic KVM's "configs" are of the HAVE_XYZ nature, and the one outlier correctly takes a dependency on CONFIG_KVM, i.e. the generic Kconfig is intended to be included unconditionally. No functional change intended. Signed-off-by: Sean Christopherson [maz: made NVHE_EL2_DEBUG depend on KVM] Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20210921222231.518092-2-seanjc@google.com

Merge branch kvm-arm64/generic-entry into kvmarm-master/next

2021-08-20T11:23:09Z

Switch KVM/arm64 to the generic entry code, courtesy of Oliver Upton * kvm-arm64/generic-entry: KVM: arm64: Use generic KVM xfer to guest work function entry: KVM: Allow use of generic KVM entry w/o full generic support KVM: arm64: Record number of signal exits as a vCPU stat Signed-off-by: Marc Zyngier

KVM: arm64: Use generic KVM xfer to guest work function

2021-08-19T10:19:41Z

Clean up handling of checks for pending work by switching to the generic infrastructure to do so. We pick up handling for TIF_NOTIFY_RESUME from this switch, meaning that task work will be correctly handled. Signed-off-by: Oliver Upton Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20210802192809.1851010-4-oupton@google.com

KVM: arm64: Introduce hyp_assert_lock_held()

2021-08-11T10:39:35Z

Introduce a poor man's lockdep implementation at EL2 which allows to BUG() whenever a hyp spinlock is not held when it should. Hide this feature behind a new Kconfig option that targets the EL2 object specifically, instead of piggy backing on the existing CONFIG_LOCKDEP. EL2 cannot WARN() cleanly to report locking issues, hence BUG() is the only option and it is not clear whether we want this widely enabled. This is most likely going to be useful for local testing until the EL2 WARN() situation has improved. Signed-off-by: Quentin Perret Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20210809152448.1810400-3-qperret@google.com