Function _anon_page_write

components/mm/mm_anon.c:409–443

}

static void _anon_page_write(struct rt_varea *varea, struct rt_aspace_io_msg *iomsg)
{
    rt_aspace_t from_aspace = varea->aspace;
    rt_aspace_t backup = _anon_obj_get_backup(varea->mem_obj);

    if (from_aspace != backup)
    {
        /* varea in guest aspace cannot modify the page */
        iomsg->response.status = MM_FAULT_STATUS_UNRECOVERABLE;
    }
    else if (rt_hw_mmu_v2p(from_aspace, iomsg->fault_vaddr) == ARCH_MAP_FAILED)
    {
        struct rt_aspace_fault_msg msg;
        msg.fault_op = MM_FAULT_OP_WRITE;
        msg.fault_type = MM_FAULT_TYPE_PAGE_FAULT;
        msg.fault_vaddr = iomsg->fault_vaddr;
        msg.off = iomsg->off;
        rt_mm_fault_res_init(&msg.response);

        _fetch_page_for_varea(varea, &msg, RT_TRUE);
        if (msg.response.status == MM_FAULT_STATUS_OK_MAPPED)
        {
            write_by_mte(backup, iomsg);
        }
        else
        {
            /* mapping failed, report an error */
            iomsg->response.status = MM_FAULT_STATUS_UNRECOVERABLE;
        }
    }
    else
    {
        write_by_mte(backup, iomsg);
    }
}

static struct rt_private_ctx _priv_obj = {
    .mem_obj.get_name = _anon_get_name,