Thanks,it is my fault that I ignore if (kvm_hv_hypercall_enabled(vcpu->kvm)) return kvm_hv_hypercall(vcpu); in the kvm_emulate_hypercall function,and in fact VM exit did occured! however,I have another question,I want to set PF_VECTOR in exception and to intercept a specific address in VM such as 0xFFFFFFFF,at fist I set PAGE_FAULT_ERROR_CODE_MASK and PAGE_FAULT_ERROR_CODE_MATCH to 0 ,so as to get my target error code,then change PAGE_FAULT_ERROR_CODE_MASK fitting my error code,but at the first step,host break down!I do not know why! can you analyse the possible reason?? thanks a lot! 2017-01-03 19:47 GMT+08:00 Huaitong Han <oenhan@xxxxxxxxx>: > how did you confirm no VM-Exit occurred > > Thanks. > > Huaitong Han > Intel OTC Virtualization team > > 2017-01-02 18:24 GMT+08:00 jack.chen <zhunxun@xxxxxxxxx>: >> >> thanks, I just need it exit to kvm ,however every time I execute >> VMCALL,it program breakdown,and no exit occured!!I do not know why! >> >> 2017-01-02 17:55 GMT+08:00 Paolo Bonzini <pbonzini@xxxxxxxxxx>: >> > Please reply to the mailing list, or I will stop answering your >> > questions even there. >> > >> > Paolo >> > >> > On 02/01/2017 10:48, jack.chen wrote: >> >> thanks, I just need it exit to kvm ,however every time I execute >> >> VMCALL,it program breakdown,and no exit occured!!I do not know why! >> >> >> >> 2017-01-02 17:36 GMT+08:00 Paolo Bonzini <pbonzini@xxxxxxxxxx>: >> >>> >> >>> >> >>> On 30/12/2016 10:14, jack.chen wrote: >> >>>> hello ,I execute VMCALL in virtual machine，But no vm exit occured,is >> >>>> the VMCALL need set some bit in register or VMCS ?? >> >>>> thanks! >> >>>> #define VMCALL_M __asm _EMIT 0x0f __asm _EMIT 0x01 __asm _EMIT 0xc1 >> >>> >> >>> If you're expecting an exit to QEMU, you won't get it; VMCALL is >> >>> usually >> >>> handled entirely in the kernel. >> >>> >> >>> Paolo >> -- >> To unsubscribe from this list: send the line "unsubscribe kvm" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
