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
