On 07/02/2013 05:08:02 PM, Yoder Stuart-B08248 wrote:
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KVM_EXIT_EPAPR_HCALL exit definition
/* KVM_EXIT_EPAPR_HCALL */
struct {
__u64 nr;
__u64 ret;
__u64 args[8];
} epapr_hcall;
This is used on Power/PowerPC platforms that support ePAPR hcalls.
It occurs when a guest does a hypercall (as defined
in the ePAPR 1.1) and the hcall is not handled by the kernel.
The 'nr' field contains the hypercall number (from the guest R11),
and 'args' contains the arguments (from the guest R3 - R10).
Userspace should put the return code in 'ret' and any extra returned
values in args[]. As per the ePAPR hcall ABI, the return value
should be returned to the guest in R3 and output return values
in R4 - R10.
Should we specify that KVM fills in upper half of each value with zero
if the target is not in 64-bit mode?
-Scott
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