KVM: x86: BUS_LOCK_EXIT fixes

[PATCH 0/3] KVM: x86: BUS_LOCK_EXIT fixes

Xiaoyao Li posted 3 patches 1 month, 3 weeks ago

Download series mbox

arch/x86/kvm/vmx/vmx.c |  5 +++--
arch/x86/kvm/x86.c     | 14 +++++++++++---
2 files changed, 14 insertions(+), 5 deletions(-)

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[PATCH 0/3] KVM: x86: BUS_LOCK_EXIT fixes

Posted by Xiaoyao Li 1 month, 3 weeks ago

This series contains fixes for x86 Bus Lock Exit feature.

Patch 1 fixes a bug which is somewhat discovered by Sashiko, when it
reviewed the TDX Bus Lock Exit enabling patch [1]. It pointed out one
issue for the TDX patch, and I found the existing VMX code has the same
issue.

Patch 2 and patch 3 fix the issues for KVM_CAP_X86_BUS_LOCK_EXIT,
which were found When I tested the TDX Bus Lock Exit enabling patch.

[1] https://lore.kernel.org/all/20260805034602.5B2BB1F000E9@smtp.kernel.org/

Xiaoyao Li (3):
  KVM: VMX: Preserve negative return value in vmx_handle_exit() with bus
    lock detected
  KVM: x86: Reject enabling KVM_CAP_X86_BUS_LOCK_EXIT when
    !kvm_caps.has_bus_lock_exit
  KVM: x86: Only allow enabling KVM_BUS_LOCK_DETECTION_EXIT before
    creating any vCPU

 arch/x86/kvm/vmx/vmx.c |  5 +++--
 arch/x86/kvm/x86.c     | 14 +++++++++++---
 2 files changed, 14 insertions(+), 5 deletions(-)


base-commit: a806d364ef288a6443a1337820ea8410a7ccc6b3
-- 
2.43.0