On 2022/1/17 21:16, Jason Gunthorpe wrote:
> On Thu, Jan 13, 2022 at 11:03:50AM +0800, Xiao Yang wrote:
>> +static enum resp_states process_atomic_write(struct rxe_qp *qp,
>> + struct rxe_pkt_info *pkt)
>> +{
>> + struct rxe_mr *mr = qp->resp.mr;
>> +
>> + u64 *src = payload_addr(pkt);
>> +
>> + u64 *dst = iova_to_vaddr(mr, qp->resp.va + qp->resp.offset, sizeof(u64));
>> + if (!dst || (uintptr_t)dst& 7)
>> + return RESPST_ERR_MISALIGNED_ATOMIC;
> It looks to me like iova_to_vaddr is completely broken, where is the
> kmap on that flow?
Hi Jason,
I think rxe_mr_init_user() maps the user addr space to the kernel addr
space during memory region registration, the mapping records are saved
into mr->cur_map_set->map[x].
Why do you think iova_to_vaddr() is completely broken?
Best Regards,
Xiao Yang
> Jason
