Anthony Liguori <[EMAIL PROTECTED]> writes:
>
> I've got a patch that should appear in virtbench soon that actually
> measures vmcall latency.
>
> http://ozlabs.org/~rusty/virtbench
>
Thanks Anthony. I have a newbie question though. In the vmcall function in the
patch:
+static int vmcall(unsigned int cmd)
+{
+ signal(SIGILL, illegal_instruction);
+ asm volatile(".byte 0x0F,0x01,0xC1,0xC3\n" ::"a"(cmd));
+ signal(SIGILL, SIG_DFL);
+
+ return 0;
+}
Why do you have the ret opcode '0xC3' with the vmcall?
Thanks
Omar
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