linux-kernel - [GIT PULL] KVM: x86: Misc changes for 6.16

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Message-ID: <20250523162504.3281680-2-seanjc@google.com>
Date: Fri, 23 May 2025 09:24:58 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Paolo Bonzini <pbonzini@...hat.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Sean Christopherson <seanjc@...gle.com>
Subject: [GIT PULL] KVM: x86: Misc changes for 6.16

Nothing major, the most interesting change is an optimization to rescan I/O
APIC routes after an EOI VM-Exit when an interception of the EOI was necessary
only because of an in-flight IRQ from the previous routing.

The following changes since commit 45eb29140e68ffe8e93a5471006858a018480a45:

  Merge branch 'kvm-fixes-6.15-rc4' into HEAD (2025-04-24 13:39:34 -0400)

are available in the Git repository at:

  https://github.com/kvm-x86/linux.git tags/kvm-x86-misc-6.16

for you to fetch changes up to 37d8bad41d2b0a7d269affb85979a8e4114e177a:

  KVM: Remove obsolete comment about locking for kvm_io_bus_read/write (2025-05-08 07:16:15 -0700)

----------------------------------------------------------------
KVM x86 misc changes for 6.16:

 - Unify virtualization of IBRS on nested VM-Exit, and cross-vCPU IBPB, between
   SVM and VMX.

 - Advertise support to userspace for WRMSRNS and PREFETCHI.

 - Rescan I/O APIC routes after handling EOI that needed to be intercepted due
   to the old/previous routing, but not the new/current routing.

 - Add a module param to control and enumerate support for device posted
   interrupts.

 - Misc cleanups.

----------------------------------------------------------------
Babu Moger (1):
      KVM: x86: Advertise support for AMD's PREFETCHI

Borislav Petkov (1):
      KVM: x86: Sort CPUID_8000_0021_EAX leaf bits properly

Dan Carpenter (1):
      KVM: x86: clean up a return

Li RongQing (1):
      KVM: Remove obsolete comment about locking for kvm_io_bus_read/write

Sean Christopherson (7):
      x86/msr: Rename the WRMSRNS opcode macro to ASM_WRMSRNS (for KVM)
      KVM: x86: Advertise support for WRMSRNS
      KVM: x86: Isolate edge vs. level check in userspace I/O APIC route scanning
      KVM: x86: Add a helper to deduplicate I/O APIC EOI interception logic
      KVM: VMX: Don't send UNBLOCK when starting device assignment without APICv
      KVM: x86: Add module param to control and enumerate device posted IRQs
      KVM: x86: Unify cross-vCPU IBPB

Yosry Ahmed (4):
      x86/cpufeatures: Define X86_FEATURE_AMD_IBRS_SAME_MODE
      KVM: x86: Propagate AMD's IbrsSameMode to the guest
      KVM: x86: Generalize IBRS virtualization on emulated VM-exit
      KVM: SVM: Clear current_vmcb during vCPU free for all *possible* CPUs

weizijie (1):
      KVM: x86: Rescan I/O APIC routes after EOI interception for old routing

 arch/x86/include/asm/cpufeatures.h       |  2 ++
 arch/x86/include/asm/kvm_host.h          |  4 +++-
 arch/x86/include/asm/msr.h               |  4 ++--
 arch/x86/kvm/cpuid.c                     |  8 ++++++-
 arch/x86/kvm/ioapic.c                    |  7 ++----
 arch/x86/kvm/ioapic.h                    |  2 ++
 arch/x86/kvm/irq_comm.c                  | 37 +++++++++++++++++++++++++++-----
 arch/x86/kvm/lapic.c                     |  8 +++++++
 arch/x86/kvm/svm/nested.c                |  2 ++
 arch/x86/kvm/svm/svm.c                   | 27 ++---------------------
 arch/x86/kvm/svm/svm.h                   |  2 --
 arch/x86/kvm/vmx/nested.c                | 17 ++++-----------
 arch/x86/kvm/vmx/posted_intr.c           |  7 +++---
 arch/x86/kvm/vmx/vmx.c                   | 18 ++++------------
 arch/x86/kvm/vmx/vmx.h                   |  3 +--
 arch/x86/kvm/x86.c                       | 29 +++++++++++++++++++++++--
 arch/x86/kvm/x86.h                       | 18 ++++++++++++++++
 tools/arch/x86/include/asm/cpufeatures.h |  1 +
 virt/kvm/kvm_main.c                      |  3 ---
 19 files changed, 120 insertions(+), 79 deletions(-)