[GIT PULL] KVM: x86: Fixes for 6.11-rcN

[GIT PULL] KVM: x86: Fixes for 6.11-rcN

[Sean Christopherson]

Please pull a handful of random fixes.  Details in the tag and changelogs.

The following changes since commit 47ac09b91befbb6a235ab620c32af719f8208399:

  Linux 6.11-rc4 (2024-08-18 13:17:27 -0700)

are available in the Git repository at:

  https://github.com/kvm-x86/linux.git tags/kvm-x86-fixes-6.11-rcN

for you to fetch changes up to 5fa9f0480c7985e44e6ec32def0a395b768599cc:

  KVM: SEV: Update KVM_AMD_SEV Kconfig entry and mention SEV-SNP (2024-08-28 05:46:25 -0700)

----------------------------------------------------------------
KVM x86 fixes for 6.11

 - Fixup missed comments from the REMOVED_SPTE=>FROZEN_SPTE rename.

 - Ensure a root is successfully loaded when pre-faulting SPTEs.

 - Grab kvm->srcu when handling KVM_SET_VCPU_EVENTS to guard against accessing
   memslots if toggling SMM happens to force a VM-Exit.

 - Emulate MSR_{FS,GS}_BASE on SVM even though interception is always disabled,
   so that KVM does the right thing if KVM's emulator encounters {RD,WR}MSR.

 - Explicitly clear BUS_LOCK_DETECT from KVM's caps on AMD, as KVM doesn't yet
   virtualize BUS_LOCK_DETECT on AMD.

 - Cleanup the help message for CONFIG_KVM_AMD_SEV, and call out that KVM now
   supports SEV-SNP too.

----------------------------------------------------------------
Maxim Levitsky (1):
      KVM: SVM: fix emulation of msr reads/writes of MSR_FS_BASE and MSR_GS_BASE

Ravi Bangoria (1):
      KVM: SVM: Don't advertise Bus Lock Detect to guest if SVM support is missing

Sean Christopherson (2):
      KVM: x86/mmu: Check that root is valid/loaded when pre-faulting SPTEs
      KVM: x86: Acquire kvm->srcu when handling KVM_SET_VCPU_EVENTS

Vitaly Kuznetsov (1):
      KVM: SEV: Update KVM_AMD_SEV Kconfig entry and mention SEV-SNP

Yan Zhao (1):
      KVM: x86/mmu: Fixup comments missed by the REMOVED_SPTE=>FROZEN_SPTE rename

 arch/x86/kvm/Kconfig       |  6 ++++--
 arch/x86/kvm/mmu/mmu.c     |  4 +++-
 arch/x86/kvm/mmu/spte.c    |  6 +++---
 arch/x86/kvm/mmu/spte.h    |  2 +-
 arch/x86/kvm/mmu/tdp_mmu.c |  8 ++++----
 arch/x86/kvm/svm/svm.c     | 15 +++++++++++++++
 arch/x86/kvm/x86.c         |  2 ++
 7 files changed, 32 insertions(+), 11 deletions(-)

Re: [GIT PULL] KVM: x86: Fixes for 6.11-rcN

[Paolo Bonzini]

On Sat, Aug 31, 2024 at 1:40 AM Sean Christopherson <seanjc@google.com> wrote:
>
> Please pull a handful of random fixes.  Details in the tag and changelogs.
>
> The following changes since commit 47ac09b91befbb6a235ab620c32af719f8208399:
>
>   Linux 6.11-rc4 (2024-08-18 13:17:27 -0700)
>
> are available in the Git repository at:
>
>   https://github.com/kvm-x86/linux.git tags/kvm-x86-fixes-6.11-rcN
>
> for you to fetch changes up to 5fa9f0480c7985e44e6ec32def0a395b768599cc:
>
>   KVM: SEV: Update KVM_AMD_SEV Kconfig entry and mention SEV-SNP (2024-08-28 05:46:25 -0700)

Pulled, thanks.

Paolo

> ----------------------------------------------------------------
> KVM x86 fixes for 6.11
>
>  - Fixup missed comments from the REMOVED_SPTE=>FROZEN_SPTE rename.
>
>  - Ensure a root is successfully loaded when pre-faulting SPTEs.
>
>  - Grab kvm->srcu when handling KVM_SET_VCPU_EVENTS to guard against accessing
>    memslots if toggling SMM happens to force a VM-Exit.
>
>  - Emulate MSR_{FS,GS}_BASE on SVM even though interception is always disabled,
>    so that KVM does the right thing if KVM's emulator encounters {RD,WR}MSR.
>
>  - Explicitly clear BUS_LOCK_DETECT from KVM's caps on AMD, as KVM doesn't yet
>    virtualize BUS_LOCK_DETECT on AMD.
>
>  - Cleanup the help message for CONFIG_KVM_AMD_SEV, and call out that KVM now
>    supports SEV-SNP too.
>
> ----------------------------------------------------------------
> Maxim Levitsky (1):
>       KVM: SVM: fix emulation of msr reads/writes of MSR_FS_BASE and MSR_GS_BASE
>
> Ravi Bangoria (1):
>       KVM: SVM: Don't advertise Bus Lock Detect to guest if SVM support is missing
>
> Sean Christopherson (2):
>       KVM: x86/mmu: Check that root is valid/loaded when pre-faulting SPTEs
>       KVM: x86: Acquire kvm->srcu when handling KVM_SET_VCPU_EVENTS
>
> Vitaly Kuznetsov (1):
>       KVM: SEV: Update KVM_AMD_SEV Kconfig entry and mention SEV-SNP
>
> Yan Zhao (1):
>       KVM: x86/mmu: Fixup comments missed by the REMOVED_SPTE=>FROZEN_SPTE rename
>
>  arch/x86/kvm/Kconfig       |  6 ++++--
>  arch/x86/kvm/mmu/mmu.c     |  4 +++-
>  arch/x86/kvm/mmu/spte.c    |  6 +++---
>  arch/x86/kvm/mmu/spte.h    |  2 +-
>  arch/x86/kvm/mmu/tdp_mmu.c |  8 ++++----
>  arch/x86/kvm/svm/svm.c     | 15 +++++++++++++++
>  arch/x86/kvm/x86.c         |  2 ++
>  7 files changed, 32 insertions(+), 11 deletions(-)
>