The MSI-X descriptor has a "delivery mode" field which can be set to various different targets, such as "Fixed" (default), SMI, NMI or INIT. Usually when we pass devices into guests, we only ever see this MSI-X descriptor configured as Fixed, so nobody realized that the other modes were broken when using posted interrupts. With posted interrupts, we end up configuring these special modes just the same as a Fixed interrupt. That means instead of generating an SMI, we inject a normal GSI into the guest. Of course, that if completely broken. These two patches attempt to fix the situation for x86 systems. If anyone has a great idea how to generalize the filtering though, I'm all ears. Alex Alexander Graf (2): KVM: VMX: Disable posted interrupts for odd IRQs KVM: SVM: Disable posted interrupts for odd IRQs arch/x86/kvm/svm.c | 16 ++++++++++++++++ arch/x86/kvm/vmx/vmx.c | 22 ++++++++++++++++++++++ 2 files changed, 38 insertions(+) -- 2.17.1 Amazon Development Center Germany GmbH Krausenstr. 38 10117 Berlin Geschaeftsfuehrung: Christian Schlaeger, Ralf Herbrich Eingetragen am Amtsgericht Charlottenburg unter HRB 149173 B Sitz: Berlin Ust-ID: DE 289 237 879
