Linux-5.9 switched KVM guests to interrupt based APF mechanism for 'page ready' events (instead of the previously used '#PF' exception) but a collision with the newly introduced IDTENTRY magic happened and it wasn't properly resolved. QEMU doesn't currently enable KVM_FEATURE_ASYNC_PF_INT bit so the breakage is invisible but all KVM guests will hang as soon as the bit will get exposed. Vitaly Kuznetsov (2): x86/kvm: properly use DEFINE_IDTENTRY_SYSVEC() macro x86/kvm: don't forget to ACK async PF IRQ arch/x86/kernel/kvm.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) -- 2.25.4
