Marcelo Tosatti wrote:
With pages out of sync invlpg needs to be trapped. For now simply nuke
the entry.
We could kvm_mmu_pte_write() it, with some modifications. Probably
worth it for the guest breaking cow.
[EXIT_REASON_MSR_WRITE] = handle_wrmsr,
[EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window,
[EXIT_REASON_HLT] = handle_halt,
+ [EXIT_REASON_INVLPG] = handle_invlpg,
[EXIT_REASON_VMCALL] = handle_vmcall,
[EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold,
[EXIT_REASON_APIC_ACCESS] = handle_apic_access,
We shouldn't do that if ept or npt is enabled.
Index: kvm/arch/x86/kvm/mmu.c
===================================================================
--- kvm.orig/arch/x86/kvm/mmu.c
+++ kvm/arch/x86/kvm/mmu.c
@@ -889,6 +889,12 @@ static int nonpaging_sync_page(struct kv
return 1;
}
+static void nonpaging_invlpg(struct kvm_vcpu *vcpu, gva_t gva)
+{
+ /* should never happen */
+ WARN_ON(1);
+}
Nevertheless, invlpg is legal in real mode.
--
error compiling committee.c: too many arguments to function
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