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

Pull kvm fixes from Paolo Bonzini:
 "arm64:

   - Restore CONFIG_PKVM_DISABLE_STAGE2_ON_PANIC to its former glory by
     making sure the config symbol is correctly spelled out in the code

   - Don't reset the AArch32 view of the PMU counters to zero when the
     guest is writing to them

   - Fix an assorted collection of memory leaks in the newly added
     tracing code

   - Fix the capping of ZCR_EL2 which could be used in an unsanitised
     way by an L2 guest

  x86:

   - Include the kernel's linux/mman.h in KVM selftests to ensure
     MADV_COLLAPSE is defined, as older libc versions may not provide
     it.

   - Include execinfo.h if and only if KVM selftests are building
     against glibc, and provide a test_dump_stack() for non-glibc
     builds.

   - Silence an annoying RCU splat on (even non-KVM-related) panics.

     The splat is technically legit, but in practice not an issue. To
     have a race, you would need to unload the KVM modules at exactly
     the time a panic happens; and speaking of incredibly rare races,
     taking the locks risks introducing a deadlock if the module unload
     code took the lock on a CPU that has been halted. Which seems
     possibly more likely than the RCU grace period issue, so just shut
     it up. This code used to be in KVM but is now outside it; but the
     x86 maintainers haven't picked it up, so here we are.

   - Rate-limit global clock updates once again (but without delayed
     work), as KVM was subtly relying on the old rate-limiting for NPT
     correction to guard against "update storms" when running without a
     master clock on systems with overcommitted CPUs.

   - Fix a brown paper bag goof where KVM checked if ERAPS is "dirty"
     instead of marking it dirty when emulating INVPCID.

   - Flush the TLB when transitioning from xAVIC => x2AVIC to ensure the
     CPU TLB doesn't contain AVIC-tagged entries for the APIC base GPA.

   - The top 10 commits fix buffer overflow (and potential TOC/TOU)
     flaws in the page state change protocol for encrypted VMs. AI
     models find it quite easily given it was reported three times, but
     aren't as good at writing a comprehensive fix. There's more to
     clean up in the area, which will come in 7.2"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (22 commits)
  KVM: SEV: Use READ_ONCE() when reading entries/indices from PSC buffer
  KVM: SEV: Check PSC request indices against the actual size of the buffer
  KVM: SEV: Don't explicitly pass PSC buffer to snp_begin_psc()
  KVM: SEV: WARN if KVM attempts to setup scratch area with min_len==0
  KVM: SEV: Compute the correct max length of the in-GHCB scratch area
  KVM: SEV: Use the size of the PSC header as the minimum size for PSC requests
  KVM: SEV: Ignore Port I/O requests of length '0'
  KVM: SEV: Reject MMIO requests larger than 8 bytes with GHCB v2+
  KVM: SEV: Ignore MMIO requests of length '0'
  KVM: SEV: Require in-GHCB scratch area if GHCB v2+ is in use
  KVM: arm64: Correctly cap ZCR_EL2 provided by a guest hypervisor
  KVM: arm64: Fix memory leak in hyp_trace_unload()
  KVM: arm64: Fix rollback in hyp_trace_buffer_share_hyp()
  KVM: arm64: Fix meta-page unsharing in pKVM hyp tracing
  KVM: arm64: PMU: Preserve AArch32 counter low bits
  KVM: SVM: Flush the current TLB when transitioning from xAVIC => x2AVIC
  KVM: x86: Fix ERAPS RAP clear on INVPCID single-context invalidation
  KVM: arm64: Fix CONFIG_PKVM_DISABLE_STAGE2_ON_PANIC
  KVM: selftests: Guard execinfo.h inclusion for non-glibc builds
  KVM: x86: Rate-limit global clock updates on vCPU load
  ...