linux-kernel - [GIT PULL] KVM fixes for Linux 6.12-rc8 or final

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Message-ID: <20241112181700.384873-1-pbonzini@redhat.com>
Date: Tue, 12 Nov 2024 13:17:00 -0500
From: Paolo Bonzini <pbonzini@...hat.com>
To: torvalds@...ux-foundation.org
Cc: linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org
Subject: [GIT PULL] KVM fixes for Linux 6.12-rc8 or final

Linus,

The following changes since commit 59b723cd2adbac2a34fc8e12c74ae26ae45bf230:

  Linux 6.12-rc6 (2024-11-03 14:05:52 -1000)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/virt/kvm/kvm.git tags/for-linus

for you to fetch changes up to aa0d42cacf093a6fcca872edc954f6f812926a17:

  KVM: VMX: Bury Intel PT virtualization (guest/host mode) behind CONFIG_BROKEN (2024-11-08 05:57:13 -0500)

----------------------------------------------------------------
KVM x86 and selftests fixes for 6.12:

x86:

- When emulating a guest TLB flush for a nested guest, flush vpid01, not
  vpid02, if L2 is active but VPID is disabled in vmcs12, i.e. if L2 and
  L1 are sharing VPID '0' (from L1's perspective).

- Fix a bug in the SNP initialization flow where KVM would return '0' to
  userspace instead of -errno on failure.

- Move the Intel PT virtualization (i.e. outputting host trace to host
  buffer and guest trace to guest buffer) behind CONFIG_BROKEN.

- Fix memory leak on failure of KVM_SEV_SNP_LAUNCH_START

- Fix a bug where KVM fails to inject an interrupt from the IRR after
  KVM_SET_LAPIC.

Selftests:

- Increase the timeout for the memslot performance selftest to avoid false
  failures on arm64 and nested x86 platforms.

- Fix a goof in the guest_memfd selftest where a for-loop initialized a
  bit mask to zero instead of BIT(0).

- Disable strict aliasing when building KVM selftests to prevent the
  compiler from treating things like "u64 *" to "uint64_t *" cases as
  undefined behavior, which can lead to nasty, hard to debug failures.

- Force -march=x86-64-v2 for KVM x86 selftests if and only if the uarch
  is supported by the compiler.

- Fix broken compilation of kvm selftests after a header sync in tools/

----------------------------------------------------------------
Dionna Glaze (1):
      kvm: svm: Fix gctx page leak on invalid inputs

John Sperbeck (1):
      KVM: selftests: use X86_MEMTYPE_WB instead of VMX_BASIC_MEM_TYPE_WB

Maxim Levitsky (1):
      KVM: selftests: memslot_perf_test: increase guest sync timeout

Paolo Bonzini (1):
      Merge tag 'kvm-x86-fixes-6.12-rcN' of https://github.com/kvm-x86/linux into HEAD

Patrick Roy (1):
      KVM: selftests: fix unintentional noop test in guest_memfd_test.c

Sean Christopherson (6):
      KVM: selftests: Disable strict aliasing
      KVM: selftests: Don't force -march=x86-64-v2 if it's unsupported
      KVM: nVMX: Treat vpid01 as current if L2 is active, but with VPID disabled
      KVM: SVM: Propagate error from snp_guest_req_init() to userspace
      KVM: x86: Unconditionally set irr_pending when updating APICv state
      KVM: VMX: Bury Intel PT virtualization (guest/host mode) behind CONFIG_BROKEN

 arch/x86/kvm/lapic.c                            | 29 +++++++++++++++---------
 arch/x86/kvm/svm/sev.c                          | 15 ++++++++-----
 arch/x86/kvm/vmx/nested.c                       | 30 ++++++++++++++++++++-----
 arch/x86/kvm/vmx/vmx.c                          |  6 +++--
 tools/testing/selftests/kvm/Makefile            | 10 +++++----
 tools/testing/selftests/kvm/guest_memfd_test.c  |  2 +-
 tools/testing/selftests/kvm/lib/x86_64/vmx.c    |  2 +-
 tools/testing/selftests/kvm/memslot_perf_test.c |  2 +-
 8 files changed, 65 insertions(+), 31 deletions(-)