Il 21/07/2014 13:37, Nadav Amit ha scritto:
> +int kvm_exception_type(unsigned int nr)
The manual calls this the exception class.
Please open code this as an if like this
int mask;
/* This should never happen, right? */
if (WARN_ON(nr > 31))
return EXCPT_INTERRUPT;
mask = 1 << nr;
if (mask &
((1 << DB_VECTOR) | (1 << BP_VECTOR) |
(1 << OF_VECTOR)))
return EXCPT_TRAP;
...
/*
* If it is reserved, assume it is a fault and
* set RF.
*/
return EXCPT_FAULT;
> + case VE_VECTOR:
> + return EXCPT_FAULT;
> + case DB_VECTOR:
> + return EXCPT_FAULT_OR_TRAP;
It is only a fault for instruction fetch breakpoints. You can modify
kvm_vcpu_check_breakpoint to set RF, add a comment here that fault
handling is done elsewhere, and return EXCPT_TRAP.
Paolo
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