On 04/08/16 08:13, Jan Beulich wrote:
>>>> On 03.08.16 at 22:44, <andrew.coop...@citrix.com> wrote:
>> --- a/xen/arch/x86/hvm/hvm.c
>> +++ b/xen/arch/x86/hvm/hvm.c
>> @@ -5194,8 +5194,14 @@ int hvm_do_hypercall(struct cpu_user_regs *regs)
>> switch ( mode )
>> {
>> case 8:
>> + if ( eax == __HYPERVISOR_hvm_op &&
>> + regs->rdi == HVMOP_guest_request_vm_event )
>> + break;
>> case 4:
>> case 2:
>> + if ( eax == __HYPERVISOR_hvm_op &&
>> + regs->ebx == HVMOP_guest_request_vm_event )
> I think you really mean _ebx here.
True, but it is very hard in 32 or 16bit code to have upper bits set in
the 64bit register.
~Andrew
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