Messages in this thread | | | From | Vitaly Kuznetsov <> | Subject | Re: [GIT PULL] KVM changes for Linux 5.6-rc4 | Date | Mon, 02 Mar 2020 19:40:35 +0100 |
| |
Paolo Bonzini <pbonzini@redhat.com> writes:
> KVM: nVMX: Don't emulate instructions in guest mode
I just discovered that this patch breaks Hyper-V on KVM completely; Oliver's 86f7e90ce8 ("KVM: VMX: check descriptor table exits on instruction emulation") doesn't fix it either. The breakage manifests itself as
qemu-system-x86-23579 [005] 22018.775584: kvm_exit: reason EPT_VIOLATION rip 0xfffff802987d6169 info 181 0 qemu-system-x86-23579 [005] 22018.775584: kvm_nested_vmexit: rip fffff802987d6169 reason EPT_VIOLATION info1 181 info2 0 int_info 0 int_info_err 0 qemu-system-x86-23579 [005] 22018.775585: kvm_page_fault: address febd0000 error_code 181 qemu-system-x86-23579 [005] 22018.775592: kvm_emulate_insn: 0:fffff802987d6169: f3 a5 qemu-system-x86-23579 [005] 22018.775593: kvm_emulate_insn: 0:fffff802987d6169: f3 a5 FAIL qemu-system-x86-23579 [005] 22018.775596: kvm_inj_exception: #UD (0x0)
We probably need to re-enable instruction emulation for something...
-- Vitaly
| |