[GIT PULL] First batch of KVM changes for 5.6 merge window

From: Paolo Bonzini
Date: Thu Jan 30 2020 - 13:20:54 EST

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Linus,

The following changes since commit ae6088216ce4b99b3a4aaaccd2eb2dd40d473d42:

Merge tag 'trace-v5.5-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace (2020-01-06 15:38:38 -0800)

are available in the git repository at:

https://git.kernel.org/pub/scm/virt/kvm/kvm.git tags/kvm-5.6-1

for you to fetch changes up to 4cbc418a44d5067133271bb6eeac2382f2bf94f7:

Merge branch 'cve-2019-3016' into kvm-next-5.6 (2020-01-30 18:47:59 +0100)

----------------------------------------------------------------

ARM: Cleanups and corner case fixes

PPC: Bugfixes

x86:
* Support for mapping DAX areas with large nested page table entries.
* Cleanups and bugfixes here too. A particularly important one is
a fix for FPU load when the thread has TIF_NEED_FPU_LOAD. There is
also a race condition which could be used in guest userspace to exploit
the guest kernel, for which the embargo expired today.
* Fast path for IPI delivery vmexits, shaving about 200 clock cycles
from IPI latency.
* Protect against "Spectre-v1/L1TF" (bring data in the cache via
speculative out of bound accesses, use L1TF on the sibling hyperthread
to read it), which unfortunately is an even bigger whack-a-mole game
than SpectreV1.

Sean continues his mission to rewrite KVM. In addition to a sizable
number of x86 patches, this time he contributed a pretty large refactoring
of vCPU creation that affects all architectures but should not have any
visible effect.

s390 will come next week together with some more x86 patches.

----------------------------------------------------------------
Alex Shi (1):
KVM: remove unused guest_enter

Alexandru Elisei (1):
KVM: arm64: Treat emulated TVAL TimerValue as a signed 32-bit integer

Andrew Jones (1):
arm64: KVM: Add UAPI notes for swapped registers

Bharata B Rao (1):
KVM: PPC: Book3S HV: Release lock on page-out failure path

Boris Ostrovsky (5):
x86/kvm: Be careful not to clear KVM_VCPU_FLUSH_TLB bit
x86/kvm: Introduce kvm_(un)map_gfn()
x86/kvm: Cache gfn to pfn translation
x86/KVM: Make sure KVM_VCPU_FLUSH_TLB flag is not missed
x86/KVM: Clean up host's steal time structure

Christoffer Dall (1):
KVM: arm64: Only sign-extend MMIO up to register width

David Michael (1):
KVM: PPC: Book3S PR: Fix -Werror=return-type build failure

Eric Auger (5):
KVM: arm/arm64: vgic-its: Fix restoration of unmapped collections
KVM: arm64: pmu: Don't increment SW_INCR if PMCR.E is unset
KVM: arm64: pmu: Don't mark a counter as chained if the odd one is disabled
KVM: arm64: pmu: Fix chained SW_INCR counters
KVM: arm64: pmu: Only handle supported event counters

Gavin Shan (2):
tools/kvm_stat: Fix kvm_exit filter name
KVM: arm/arm64: Fix young bit from mmu notifier

Haiwei Li (1):
Adding 'else' to reduce checking.

James Morse (3):
KVM: arm/arm64: Re-check VMA on detecting a poisoned page
KVM: arm: Fix DFSR setting for non-LPAE aarch32 guests
KVM: arm: Make inject_abt32() inject an external abort instead

Jim Mattson (3):
kvm: nVMX: VMWRITE checks VMCS-link pointer before VMCS field
kvm: nVMX: VMWRITE checks unsupported field before read-only field
kvm: nVMX: Aesthetic cleanup of handle_vmread and handle_vmwrite

John Allen (1):
kvm/svm: PKU not currently supported

Krish Sadhukhan (1):
KVM: nVMX: Check GUEST_DR7 on vmentry of nested guests

Leonardo Bras (2):
KVM: PPC: Book3S: Replace current->mm by kvm->mm
KVM: PPC: Book3E: Replace current->mm by kvm->mm

Marc Zyngier (1):
KVM: arm/arm64: Cleanup MMIO handling

Marios Pomonis (13):
KVM: x86: Protect x86_decode_insn from Spectre-v1/L1TF attacks
KVM: x86: Protect kvm_hv_msr_[get|set]_crash_data() from Spectre-v1/L1TF attacks
KVM: x86: Refactor picdev_write() to prevent Spectre-v1/L1TF attacks
KVM: x86: Protect ioapic_read_indirect() from Spectre-v1/L1TF attacks
KVM: x86: Protect ioapic_write_indirect() from Spectre-v1/L1TF attacks
KVM: x86: Protect kvm_lapic_reg_write() from Spectre-v1/L1TF attacks
KVM: x86: Protect MSR-based index computations in fixed_msr_to_seg_unit() from Spectre-v1/L1TF attacks
KVM: x86: Protect MSR-based index computations in pmu.h from Spectre-v1/L1TF attacks
KVM: x86: Protect MSR-based index computations from Spectre-v1/L1TF attacks in x86.c
KVM: x86: Refactor prefix decoding to prevent Spectre-v1/L1TF attacks
KVM: x86: Protect exit_reason from being used in Spectre-v1/L1TF attacks
KVM: x86: Protect DR-based index computations from Spectre-v1/L1TF attacks
KVM: x86: Protect pmu_intel.c from Spectre-v1/L1TF attacks

Mark Brown (1):
arm64: KVM: Annotate guest entry/exit as a single function

Mark Rutland (3):
KVM: arm64: Correct PSTATE on exception entry
KVM: arm/arm64: Correct CPSR on exception entry
KVM: arm/arm64: Correct AArch32 SPSR on exception entry

Miaohe Lin (19):
KVM: vmx: remove unreachable statement in vmx_get_msr_feature()
KVM: get rid of var page in kvm_set_pfn_dirty()
KVM: explicitly set rmap_head->val to 0 in pte_list_desc_remove_entry()
KVM: x86: Fix some comment typos
KVM: lib: use jump label to handle resource release in irq_bypass_register_consumer()
KVM: lib: use jump label to handle resource release in irq_bypass_register_producer()
KVM: x86: check kvm_pit outside kvm_vm_ioctl_reinject()
KVM: Fix some wrong function names in comment
KVM: Fix some out-dated function names in comment
KVM: Fix some comment typos and missing parentheses
KVM: Fix some grammar mistakes
KVM: hyperv: Fix some typos in vcpu unimpl info
KVM: Fix some writing mistakes
KVM: vmx: delete meaningless nested_vmx_prepare_msr_bitmap() declaration
KVM: nVMX: vmread should not set rflags to specify success in case of #PF
KVM: x86: avoid clearing pending exception event twice
KVM: apic: short-circuit kvm_apic_accept_pic_intr() when pic intr is accepted
KVM: VMX: remove duplicated segment cache clear
KVM: X86: Add 'else' to unify fastop and execute call path

Milan Pandurov (1):
kvm: Refactor handling of VM debugfs files

Oliver Upton (1):
KVM: nVMX: WARN on failure to set IA32_PERF_GLOBAL_CTRL

Paolo Bonzini (11):
KVM: x86: use CPUID to locate host page table reserved bits
KVM: x86: fix overlap between SPTE_MMIO_MASK and generation
KVM: x86: list MSR_IA32_UCODE_REV as an emulated MSR
KVM: async_pf: drop kvm_arch_async_page_present wrappers
KVM: x86: avoid incorrect writes to host MSR_IA32_SPEC_CTRL
Revert "KVM: x86: Add a WARN on TIF_NEED_FPU_LOAD in kvm_load_guest_fpu()"
KVM: Move running VCPU from ARM to common code
KVM: x86: inline memslot_valid_for_gpte
Merge tag 'kvmarm-5.6' of git://git.kernel.org/.../kvmarm/kvmarm into HEAD
Merge tag 'kvm-ppc-next-5.6-2' of git://git.kernel.org/.../paulus/powerpc into HEAD
Merge branch 'cve-2019-3016' into kvm-next-5.6

Peng Hao (1):
kvm/x86: export kvm_vector_hashing_enabled() is unnecessary

Peter Xu (10):
KVM: X86: Fix kvm_bitmap_or_dest_vcpus() to use irq shorthand
KVM: X86: Move irrelevant declarations out of ioapic.h
KVM: X86: Use APIC_DEST_* macros properly in kvm_lapic_irq.dest_mode
KVM: X86: Drop KVM_APIC_SHORT_MASK and KVM_APIC_DEST_MASK
KVM: X86: Fix callers of kvm_apic_match_dest() to use correct macros
KVM: X86: Convert the last users of "shorthand = 0" to use macros
KVM: Remove kvm_read_guest_atomic()
KVM: Add build-time error check on kvm_run size
KVM: X86: Don't take srcu lock in init_rmode_identity_map()
KVM: X86: Drop x86_set_memory_region()

Russell King (1):
arm64: kvm: Fix IDMAP overlap with HYP VA

Sean Christopherson (100):
KVM: x86: Fix potential put_fpu() w/o load_fpu() on MPX platform
KVM: x86: Add a WARN on TIF_NEED_FPU_LOAD in kvm_load_guest_fpu()
KVM: x86: Use gpa_t for cr2/gpa to fix TDP support on 32-bit KVM
KVM: x86/mmu: Move definition of make_mmu_pages_available() up
KVM: x86/mmu: Fold nonpaging_map() into nonpaging_page_fault()
KVM: x86/mmu: Move nonpaging_page_fault() below try_async_pf()
KVM: x86/mmu: Refactor handling of cache consistency with TDP
KVM: x86/mmu: Refactor the per-slot level calculation in mapping_level()
KVM: x86/mmu: Refactor handling of forced 4k pages in page faults
KVM: x86/mmu: Incorporate guest's page level into max level for shadow MMU
KVM: x86/mmu: Persist gfn_lpage_is_disallowed() to max_level
KVM: x86/mmu: Rename lpage_disallowed to account_disallowed_nx_lpage
KVM: x86/mmu: Consolidate tdp_page_fault() and nonpaging_page_fault()
KVM: x86/mmu: Move transparent_hugepage_adjust() above __direct_map()
KVM: x86/mmu: Move calls to thp_adjust() down a level
KVM: x86/mmu: Move root_hpa validity checks to top of page fault handler
KVM: x86/mmu: WARN on an invalid root_hpa
KVM: x86/mmu: WARN if root_hpa is invalid when handling a page fault
KVM: VMX: Add non-canonical check on writes to RTIT address MSRs
KVM: VMX: Add helper to consolidate up PT/RTIT WRMSR fault logic
KVM: x86: Don't let userspace set host-reserved cr4 bits
KVM: x86: Ensure all logical CPUs have consistent reserved cr4 bits
KVM: x86: Drop special XSAVE handling from guest_cpuid_has()
KVM: x86: Add macro to ensure reserved cr4 bits checks stay in sync
KVM: x86: Add dedicated emulator helpers for querying CPUID features
KVM: x86: Move bit() helper to cpuid.h
KVM: x86: Add CPUID_7_1_EAX to the reverse CPUID table
KVM: x86: Expand build-time assertion on reverse CPUID usage
KVM: x86: Refactor and rename bit() to feature_bit() macro
KVM: x86/mmu: Reorder the reserved bit check in prefetch_invalid_gpte()
KVM: x86/mmu: Micro-optimize nEPT's bad memptype/XWR checks
KVM: x86/mmu: Apply max PA check for MMIO sptes to 32-bit KVM
KVM: PPC: Book3S HV: Uninit vCPU if vcore creation fails
KVM: PPC: Book3S PR: Free shared page if mmu initialization fails
KVM: x86: Free wbinvd_dirty_mask if vCPU creation fails
KVM: VMX: Allocate VPID after initializing VCPU
KVM: VMX: Use direct vcpu pointer during vCPU create/free
KVM: SVM: Use direct vcpu pointer during vCPU create/free
KVM: x86: Allocate vcpu struct in common x86 code
KVM: x86: Move FPU allocation to common x86 code
KVM: x86: Move allocation of pio_data page down a few lines
KVM: x86: Move kvm_vcpu_init() invocation to common code
KVM: PPC: e500mc: Add build-time assert that vcpu is at offset 0
KVM: PPC: Allocate vcpu struct in common PPC code
KVM: PPC: Book3S PR: Allocate book3s and shadow vcpu after common init
KVM: PPC: e500mc: Move reset of oldpir below call to kvm_vcpu_init()
KVM: PPC: Move kvm_vcpu_init() invocation to common code
KVM: MIPS: Use kvm_vcpu_cache to allocate vCPUs
KVM: MIPS: Drop kvm_arch_vcpu_free()
KVM: PPC: Drop kvm_arch_vcpu_free()
KVM: arm: Drop kvm_arch_vcpu_free()
KVM: x86: Remove spurious kvm_mmu_unload() from vcpu destruction path
KVM: x86: Remove spurious clearing of async #PF MSR
KVM: x86: Drop kvm_arch_vcpu_free()
KVM: Remove kvm_arch_vcpu_free() declaration
KVM: Add kvm_arch_vcpu_precreate() to handle pre-allocation issues
KVM: s390: Move guts of kvm_arch_vcpu_init() into kvm_arch_vcpu_create()
KVM: s390: Invoke kvm_vcpu_init() before allocating sie_page
KVM: MIPS: Invoke kvm_vcpu_uninit() immediately prior to freeing vcpu
KVM: x86: Invoke kvm_vcpu_uninit() immediately prior to freeing vcpu
KVM: Introduce kvm_vcpu_destroy()
KVM: Move vcpu alloc and init invocation to common code
KVM: Unexport kvm_vcpu_cache and kvm_vcpu_{un}init()
KVM: Move initialization of preempt notifier to kvm_vcpu_init()
KVM: x86: Move guts of kvm_arch_vcpu_setup() into kvm_arch_vcpu_create()
KVM: MIPS: Move .vcpu_setup() call to kvm_arch_vcpu_create()
KVM: s390: Manually invoke vcpu setup during kvm_arch_vcpu_create()
KVM: PPC: BookE: Setup vcpu during kvmppc_core_vcpu_create()
KVM: Drop kvm_arch_vcpu_setup()
KVM: x86: Move all vcpu init code into kvm_arch_vcpu_create()
KVM: MIPS: Move all vcpu init code into kvm_arch_vcpu_create()
KVM: ARM: Move all vcpu init code into kvm_arch_vcpu_create()
KVM: PPC: Move all vcpu init code into kvm_arch_vcpu_create()
KVM: arm64: Free sve_state via arm specific hook
KVM: Drop kvm_arch_vcpu_init() and kvm_arch_vcpu_uninit()
KVM: Move putting of vcpu->pid to kvm_vcpu_destroy()
KVM: Move vcpu->run page allocation out of kvm_vcpu_init()
KVM: x86: Handle TIF_NEED_FPU_LOAD in kvm_{load,put}_guest_fpu()
KVM: x86: Ensure guest's FPU state is loaded when accessing for emulation
KVM: x86: Revert "KVM: X86: Fix fpu state crash in kvm guest"
KVM: x86: Remove unused ctxt param from emulator's FPU accessors
KVM: x86: Perform non-canonical checks in 32-bit KVM
KVM: Check for a bad hva before dropping into the ghc slow path
KVM: Clean up __kvm_gfn_to_hva_cache_init() and its callers
KVM: Return immediately if __kvm_gfn_to_hva_cache_init() fails
KVM: x86/mmu: Enforce max_level on HugeTLB mappings
mm: thp: KVM: Explicitly check for THP when populating secondary MMU
KVM: Use vcpu-specific gva->hva translation when querying host page size
KVM: Play nice with read-only memslots when querying host page size
x86/mm: Introduce lookup_address_in_mm()
KVM: x86/mmu: Refactor THP adjust to prep for changing query
KVM: x86/mmu: Walk host page tables to find THP mappings
KVM: x86/mmu: Drop level optimization from fast_page_fault()
KVM: x86/mmu: Rely on host page tables to find HugeTLB mappings
KVM: x86/mmu: Remove obsolete gfn restoration in FNAME(fetch)
KVM: x86/mmu: Zap any compound page when collapsing sptes
KVM: x86/mmu: Fold max_mapping_level() into kvm_mmu_hugepage_adjust()
KVM: x86/mmu: Remove lpage_is_disallowed() check from set_spte()
KVM: x86/mmu: Use huge pages for DAX-backed files
KVM: x86: Use a typedef for fastop functions

Shannon Zhao (1):
KVM: ARM: Call hyp_cpu_pm_exit at the right place

Sukadev Bhattiprolu (2):
KVM: PPC: Add skip_page_out parameter to uvmem functions
KVM: PPC: Book3S HV: Implement H_SVM_INIT_ABORT hcall

Tom Lendacky (1):
KVM: SVM: Override default MMIO mask if memory encryption is enabled

Vitaly Kuznetsov (1):
x86/kvm/hyper-v: remove stale evmcs_already_enabled check from nested_enable_evmcs()

Wanpeng Li (2):
KVM: VMX: FIXED+PHYSICAL mode single target IPI fastpath
KVM: LAPIC: micro-optimize fixed mode ipi delivery

Xiaoyao Li (3):
KVM: VMX: Rename INTERRUPT_PENDING to INTERRUPT_WINDOW
KVM: VMX: Rename NMI_PENDING to NMI_WINDOW
KVM: VMX: Fix the spelling of CPU_BASED_USE_TSC_OFFSETTING

YueHaibing (1):
KVM: arm: Remove duplicate include

Zenghui Yu (4):
KVM: Remove duplicated declaration of kvm_vcpu_kick
KVM: arm/arm64: vgic: Handle GICR_PENDBASER.PTZ filed as RAZ
KVM: arm/arm64: vgic-its: Properly check the unmapped coll in DISCARD handler
KVM: arm/arm64: vgic: Drop the kvm_vgic_register_mmio_region()

zhengbin (1):
KVM: PPC: Remove set but not used variable 'ra', 'rs', 'rt'

Documentation/powerpc/ultravisor.rst | 60 ++
Documentation/virt/kvm/api.txt | 9 +
arch/arm/include/asm/kvm_emulate.h | 27 +-
arch/arm/include/asm/kvm_host.h | 16 +-
arch/arm/include/asm/kvm_hyp.h | 1 +
arch/arm/include/asm/kvm_mmio.h | 26 -
arch/arm/kvm/guest.c | 5 -
arch/arm64/include/asm/kvm_emulate.h | 40 +-
arch/arm64/include/asm/kvm_host.h | 16 +-
arch/arm64/include/asm/kvm_mmio.h | 29 -
arch/arm64/include/asm/ptrace.h | 1 +
arch/arm64/include/uapi/asm/kvm.h | 12 +-
arch/arm64/include/uapi/asm/ptrace.h | 1 +
arch/arm64/kvm/guest.c | 5 -
arch/arm64/kvm/hyp/entry.S | 7 +-
arch/arm64/kvm/inject_fault.c | 70 ++-
arch/arm64/kvm/reset.c | 2 +-
arch/arm64/kvm/va_layout.c | 56 +-
arch/mips/kvm/mips.c | 84 +--
arch/powerpc/include/asm/hvcall.h | 1 +
arch/powerpc/include/asm/kvm_book3s_uvmem.h | 10 +-
arch/powerpc/include/asm/kvm_host.h | 1 +
arch/powerpc/include/asm/kvm_ppc.h | 5 +-
arch/powerpc/kvm/book3s.c | 9 +-
arch/powerpc/kvm/book3s_64_mmu_hv.c | 4 +-
arch/powerpc/kvm/book3s_64_mmu_radix.c | 2 +-
arch/powerpc/kvm/book3s_64_vio.c | 10 +-
arch/powerpc/kvm/book3s_hv.c | 42 +-
arch/powerpc/kvm/book3s_hv_uvmem.c | 34 +-
arch/powerpc/kvm/book3s_pr.c | 34 +-
arch/powerpc/kvm/book3s_xive_native.c | 2 +-
arch/powerpc/kvm/booke.c | 67 +--
arch/powerpc/kvm/e500.c | 36 +-
arch/powerpc/kvm/e500mc.c | 30 +-
arch/powerpc/kvm/emulate_loadstore.c | 5 -
arch/powerpc/kvm/powerpc.c | 88 +--
arch/s390/include/asm/kvm_host.h | 1 -
arch/s390/kvm/kvm-s390.c | 118 ++--
arch/x86/include/asm/kvm_emulate.h | 4 +
arch/x86/include/asm/kvm_host.h | 34 +-
arch/x86/include/asm/pgtable_types.h | 4 +
arch/x86/include/asm/vmx.h | 6 +-
arch/x86/include/uapi/asm/vmx.h | 4 +-
arch/x86/kvm/cpuid.c | 9 +-
arch/x86/kvm/cpuid.h | 45 +-
arch/x86/kvm/emulate.c | 133 +++--
arch/x86/kvm/hyperv.c | 17 +-
arch/x86/kvm/i8259.c | 6 +-
arch/x86/kvm/ioapic.c | 41 +-
arch/x86/kvm/ioapic.h | 6 -
arch/x86/kvm/irq.h | 3 +
arch/x86/kvm/irq_comm.c | 18 +-
arch/x86/kvm/lapic.c | 37 +-
arch/x86/kvm/lapic.h | 9 +-
arch/x86/kvm/mmu/mmu.c | 605 +++++++++------------
arch/x86/kvm/mmu/paging_tmpl.h | 88 +--
arch/x86/kvm/mmutrace.h | 12 +-
arch/x86/kvm/mtrr.c | 8 +-
arch/x86/kvm/pmu.h | 18 +-
arch/x86/kvm/svm.c | 134 +++--
arch/x86/kvm/vmx/capabilities.h | 5 +
arch/x86/kvm/vmx/evmcs.c | 5 -
arch/x86/kvm/vmx/nested.c | 189 +++----
arch/x86/kvm/vmx/pmu_intel.c | 24 +-
arch/x86/kvm/vmx/vmcs_shadow_fields.h | 4 +-
arch/x86/kvm/vmx/vmx.c | 294 +++++-----
arch/x86/kvm/x86.c | 569 +++++++++++--------
arch/x86/kvm/x86.h | 23 +-
arch/x86/mm/pageattr.c | 11 +
include/linux/context_tracking.h | 9 -
include/linux/huge_mm.h | 6 +
include/linux/kvm_host.h | 40 +-
include/linux/kvm_types.h | 9 +-
mm/huge_memory.c | 11 +
tools/arch/x86/include/uapi/asm/vmx.h | 4 +-
tools/kvm/kvm_stat/kvm_stat | 8 +-
tools/testing/selftests/kvm/include/x86_64/vmx.h | 8 +-
.../selftests/kvm/x86_64/vmx_tsc_adjust_test.c | 2 +-
virt/kvm/arm/aarch32.c | 131 ++++-
virt/kvm/arm/arch_timer.c | 5 +-
virt/kvm/arm/arm.c | 113 +---
virt/kvm/arm/mmio.c | 68 +--
virt/kvm/arm/mmu.c | 32 +-
virt/kvm/arm/perf.c | 6 +-
virt/kvm/arm/pmu.c | 114 ++--
virt/kvm/arm/vgic/vgic-its.c | 6 +-
virt/kvm/arm/vgic/vgic-mmio-v3.c | 5 +-
virt/kvm/arm/vgic/vgic-mmio.c | 15 +-
virt/kvm/arm/vgic/vgic-mmio.h | 5 -
virt/kvm/async_pf.c | 31 +-
virt/kvm/kvm_main.c | 435 +++++++++------
virt/lib/irqbypass.c | 38 +-
92 files changed, 2387 insertions(+), 2045 deletions(-)
delete mode 100644 arch/arm/include/asm/kvm_mmio.h
delete mode 100644 arch/arm64/include/asm/kvm_mmio.h

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