powerpc/vas: Define nx_fault_stamp in coprocessor_request_block
Kernel sets fault address and status in CRB for NX page fault on user space address after processing page fault. User space gets the signal and handles the fault mentioned in CRB by bringing the page in to memory and send NX request again. Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> Signed-off-by: Haren Myneni <haren@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/1587016769.2275.1048.camel@hbabu-laptop
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