[PATCH 0/2] KVM: x86: Sanitize writes to MSR_KVM_PV_EOI_EN

[Vitaly Kuznetsov]

This is a continuation of work started by Li RongQing with
"[PATCH] KVM: x86: disable pv eoi if guest gives a wrong address":
https://lore.kernel.org/kvm/1636078404-48617-1-git-send-email-lirongqing@xxxxxxxxx/

Instead of resetting 'KVM_MSR_ENABLED' when a bogus address was written to
MSR_KVM_PV_EOI_EN I suggest we refuse to update MSR at all, this aligns
with #GP which is being injected on such writes.

Vitaly Kuznetsov (2):
  KVM: x86: Rename kvm_lapic_enable_pv_eoi()
  KVM: x86: Don't update vcpu->arch.pv_eoi.msr_val when a bogus value
    was written to MSR_KVM_PV_EOI_EN

 arch/x86/kvm/hyperv.c |  4 ++--
 arch/x86/kvm/lapic.c  | 23 ++++++++++++++---------
 arch/x86/kvm/lapic.h  |  2 +-
 arch/x86/kvm/x86.c    |  2 +-
 4 files changed, 18 insertions(+), 13 deletions(-)

-- 
2.31.1