On 02/03/20 19:40, Vitaly Kuznetsov wrote:
>
> 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...
This is a rep movsw instruction, it shouldn't be intercepted. I think
we have a stale ctxt->intercept because the
/* Fields above regs are cleared together. */
comment is not true anymore since
commit c44b4c6ab80eef3a9c52c7b3f0c632942e6489aa
Author: Bandan Das <bsd@xxxxxxxxxx>
Date: Wed Apr 16 12:46:12 2014 -0400
KVM: emulate: clean up initializations in init_decode_cache
A lot of initializations are unnecessary as they get set to
appropriate values before actually being used. Optimize
placement of fields in x86_emulate_ctxt
Signed-off-by: Bandan Das <bsd@xxxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Paolo
