| 62 | #define RANDOMIZE_VA_SPACE_FILE "/proc/sys/kernel/randomize_va_space" |
| 63 | |
| 64 | uint64_t eal_get_baseaddr(void) |
| 65 | { |
| 66 | /* |
| 67 | * Linux kernel uses a really high address as starting address for |
| 68 | * serving mmaps calls. If there exists addressing limitations and IOVA |
| 69 | * mode is VA, this starting address is likely too high for those |
| 70 | * devices. However, it is possible to use a lower address in the |
| 71 | * process virtual address space as with 64 bits there is a lot of |
| 72 | * available space. |
| 73 | * |
| 74 | * Current known limitations are 39 or 40 bits. Setting the starting |
| 75 | * address at 4GB implies there are 508GB or 1020GB for mapping the |
| 76 | * available hugepages. This is likely enough for most systems, although |
| 77 | * a device with addressing limitations should call |
| 78 | * rte_mem_check_dma_mask for ensuring all memory is within supported |
| 79 | * range. |
| 80 | */ |
| 81 | #if defined(RTE_ARCH_LOONGARCH) |
| 82 | return 0x7000000000ULL; |
| 83 | #else |
| 84 | return 0x100000000ULL; |
| 85 | #endif |
| 86 | } |
| 87 | |
| 88 | /* |
| 89 | * Get physical address of any mapped virtual address in the current process. |
no outgoing calls
no test coverage detected