#define RANDOMIZE_VA_SPACE_FILE "/proc/sys/kernel/randomize_va_space"
+uint64_t eal_get_baseaddr(void)
+{
+ /*
+ * Linux kernel uses a really high address as starting address for
+ * serving mmaps calls. If there exists addressing limitations and IOVA
+ * mode is VA, this starting address is likely too high for those
+ * devices. However, it is possible to use a lower address in the
+ * process virtual address space as with 64 bits there is a lot of
+ * available space.
+ *
+ * Current known limitations are 39 or 40 bits. Setting the starting
+ * address at 4GB implies there are 508GB or 1020GB for mapping the
+ * available hugepages. This is likely enough for most systems, although
+ * a device with addressing limitations should call
+ * rte_mem_check_dma_mask for ensuring all memory is within supported
+ * range.
+ */
+ return 0x100000000ULL;
+}
+
/*
* Get physical address of any mapped virtual address in the current process.
*/
addr = eal_get_virtual_area(msl->base_va, &mem_sz, page_sz, 0, flags);
if (addr == NULL) {
if (rte_errno == EADDRNOTAVAIL)
- RTE_LOG(ERR, EAL, "Could not mmap %llu bytes at [%p] - please use '--base-virtaddr' option\n",
+ RTE_LOG(ERR, EAL, "Could not mmap %llu bytes at [%p] - "
+ "please use '--" OPT_BASE_VIRTADDR "' option\n",
(unsigned long long)mem_sz, msl->base_va);
else
RTE_LOG(ERR, EAL, "Cannot reserve memory\n");