diff options
Diffstat (limited to 'src/dpdk22/lib/librte_eal/linuxapp/eal/eal_memory.c')
| -rw-r--r-- | src/dpdk22/lib/librte_eal/linuxapp/eal/eal_memory.c | 1599 |
1 files changed, 0 insertions, 1599 deletions
diff --git a/src/dpdk22/lib/librte_eal/linuxapp/eal/eal_memory.c b/src/dpdk22/lib/librte_eal/linuxapp/eal/eal_memory.c deleted file mode 100644 index 846fd31f..00000000 --- a/src/dpdk22/lib/librte_eal/linuxapp/eal/eal_memory.c +++ /dev/null @@ -1,1599 +0,0 @@ -/*- - * BSD LICENSE - * - * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Intel Corporation nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ -/* BSD LICENSE - * - * Copyright(c) 2013 6WIND. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * * Neither the name of 6WIND S.A. nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#define _FILE_OFFSET_BITS 64 -#include <errno.h> -#include <stdarg.h> -#include <stdlib.h> -#include <stdio.h> -#include <stdint.h> -#include <inttypes.h> -#include <string.h> -#include <stdarg.h> -#include <sys/mman.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <sys/queue.h> -#include <sys/file.h> -#include <unistd.h> -#include <limits.h> -#include <errno.h> -#include <sys/ioctl.h> -#include <sys/time.h> - -#include <rte_log.h> -#include <rte_memory.h> -#include <rte_memzone.h> -#include <rte_launch.h> -#include <rte_eal.h> -#include <rte_eal_memconfig.h> -#include <rte_per_lcore.h> -#include <rte_lcore.h> -#include <rte_common.h> -#include <rte_string_fns.h> - -#include "eal_private.h" -#include "eal_internal_cfg.h" -#include "eal_filesystem.h" -#include "eal_hugepages.h" - -#ifdef RTE_LIBRTE_XEN_DOM0 -int rte_xen_dom0_supported(void) -{ - return internal_config.xen_dom0_support; -} -#endif - -/** - * @file - * Huge page mapping under linux - * - * To reserve a big contiguous amount of memory, we use the hugepage - * feature of linux. For that, we need to have hugetlbfs mounted. This - * code will create many files in this directory (one per page) and - * map them in virtual memory. For each page, we will retrieve its - * physical address and remap it in order to have a virtual contiguous - * zone as well as a physical contiguous zone. - */ - -static uint64_t baseaddr_offset; - -static unsigned proc_pagemap_readable; - -#define RANDOMIZE_VA_SPACE_FILE "/proc/sys/kernel/randomize_va_space" - -static void -test_proc_pagemap_readable(void) -{ - int fd = open("/proc/self/pagemap", O_RDONLY); - - if (fd < 0) { - RTE_LOG(ERR, EAL, - "Cannot open /proc/self/pagemap: %s. " - "virt2phys address translation will not work\n", - strerror(errno)); - return; - } - - /* Is readable */ - close(fd); - proc_pagemap_readable = 1; -} - -/* Lock page in physical memory and prevent from swapping. */ -int -rte_mem_lock_page(const void *virt) -{ - unsigned long virtual = (unsigned long)virt; - int page_size = getpagesize(); - unsigned long aligned = (virtual & ~ (page_size - 1)); - return mlock((void*)aligned, page_size); -} - -/* - * Get physical address of any mapped virtual address in the current process. - */ -phys_addr_t -rte_mem_virt2phy(const void *virtaddr) -{ - int fd; - uint64_t page, physaddr; - unsigned long virt_pfn; - int page_size; - off_t offset; - - /* Cannot parse /proc/self/pagemap, no need to log errors everywhere */ - if (!proc_pagemap_readable) - return RTE_BAD_PHYS_ADDR; - - /* standard page size */ - page_size = getpagesize(); - - fd = open("/proc/self/pagemap", O_RDONLY); - if (fd < 0) { - RTE_LOG(ERR, EAL, "%s(): cannot open /proc/self/pagemap: %s\n", - __func__, strerror(errno)); - return RTE_BAD_PHYS_ADDR; - } - - virt_pfn = (unsigned long)virtaddr / page_size; - offset = sizeof(uint64_t) * virt_pfn; - if (lseek(fd, offset, SEEK_SET) == (off_t) -1) { - RTE_LOG(ERR, EAL, "%s(): seek error in /proc/self/pagemap: %s\n", - __func__, strerror(errno)); - close(fd); - return RTE_BAD_PHYS_ADDR; - } - if (read(fd, &page, sizeof(uint64_t)) < 0) { - RTE_LOG(ERR, EAL, "%s(): cannot read /proc/self/pagemap: %s\n", - __func__, strerror(errno)); - close(fd); - return RTE_BAD_PHYS_ADDR; - } - - /* - * the pfn (page frame number) are bits 0-54 (see - * pagemap.txt in linux Documentation) - */ - physaddr = ((page & 0x7fffffffffffffULL) * page_size) - + ((unsigned long)virtaddr % page_size); - close(fd); - return physaddr; -} - -/* - * For each hugepage in hugepg_tbl, fill the physaddr value. We find - * it by browsing the /proc/self/pagemap special file. - */ -static int -find_physaddrs(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi) -{ - unsigned i; - phys_addr_t addr; - - for (i = 0; i < hpi->num_pages[0]; i++) { - addr = rte_mem_virt2phy(hugepg_tbl[i].orig_va); - if (addr == RTE_BAD_PHYS_ADDR) - return -1; - hugepg_tbl[i].physaddr = addr; - } - return 0; -} - -/* - * Check whether address-space layout randomization is enabled in - * the kernel. This is important for multi-process as it can prevent - * two processes mapping data to the same virtual address - * Returns: - * 0 - address space randomization disabled - * 1/2 - address space randomization enabled - * negative error code on error - */ -static int -aslr_enabled(void) -{ - char c; - int retval, fd = open(RANDOMIZE_VA_SPACE_FILE, O_RDONLY); - if (fd < 0) - return -errno; - retval = read(fd, &c, 1); - close(fd); - if (retval < 0) - return -errno; - if (retval == 0) - return -EIO; - switch (c) { - case '0' : return 0; - case '1' : return 1; - case '2' : return 2; - default: return -EINVAL; - } -} - -/* - * Try to mmap *size bytes in /dev/zero. If it is successful, return the - * pointer to the mmap'd area and keep *size unmodified. Else, retry - * with a smaller zone: decrease *size by hugepage_sz until it reaches - * 0. In this case, return NULL. Note: this function returns an address - * which is a multiple of hugepage size. - */ -static void * -get_virtual_area(size_t *size, size_t hugepage_sz) -{ - void *addr; - int fd; - long aligned_addr; - - if (internal_config.base_virtaddr != 0) { - addr = (void*) (uintptr_t) (internal_config.base_virtaddr + - baseaddr_offset); - } - else addr = NULL; - - RTE_LOG(DEBUG, EAL, "Ask a virtual area of 0x%zx bytes\n", *size); - - fd = open("/dev/zero", O_RDONLY); - if (fd < 0){ - RTE_LOG(ERR, EAL, "Cannot open /dev/zero\n"); - return NULL; - } - do { - addr = mmap(addr, - (*size) + hugepage_sz, PROT_READ, MAP_PRIVATE, fd, 0); - if (addr == MAP_FAILED) - *size -= hugepage_sz; - } while (addr == MAP_FAILED && *size > 0); - - if (addr == MAP_FAILED) { - close(fd); - RTE_LOG(ERR, EAL, "Cannot get a virtual area: %s\n", - strerror(errno)); - return NULL; - } - - munmap(addr, (*size) + hugepage_sz); - close(fd); - - /* align addr to a huge page size boundary */ - aligned_addr = (long)addr; - aligned_addr += (hugepage_sz - 1); - aligned_addr &= (~(hugepage_sz - 1)); - addr = (void *)(aligned_addr); - - RTE_LOG(DEBUG, EAL, "Virtual area found at %p (size = 0x%zx)\n", - addr, *size); - - /* increment offset */ - baseaddr_offset += *size; - - return addr; -} - -/* - * Mmap all hugepages of hugepage table: it first open a file in - * hugetlbfs, then mmap() hugepage_sz data in it. If orig is set, the - * virtual address is stored in hugepg_tbl[i].orig_va, else it is stored - * in hugepg_tbl[i].final_va. The second mapping (when orig is 0) tries to - * map continguous physical blocks in contiguous virtual blocks. - */ -static int -map_all_hugepages(struct hugepage_file *hugepg_tbl, - struct hugepage_info *hpi, int orig) -{ - int fd; - unsigned i; - void *virtaddr; - void *vma_addr = NULL; - size_t vma_len = 0; - -#ifdef RTE_EAL_SINGLE_FILE_SEGMENTS - RTE_SET_USED(vma_len); -#endif - - for (i = 0; i < hpi->num_pages[0]; i++) { - uint64_t hugepage_sz = hpi->hugepage_sz; - - if (orig) { - hugepg_tbl[i].file_id = i; - hugepg_tbl[i].size = hugepage_sz; -#ifdef RTE_EAL_SINGLE_FILE_SEGMENTS - eal_get_hugefile_temp_path(hugepg_tbl[i].filepath, - sizeof(hugepg_tbl[i].filepath), hpi->hugedir, - hugepg_tbl[i].file_id); -#else - eal_get_hugefile_path(hugepg_tbl[i].filepath, - sizeof(hugepg_tbl[i].filepath), hpi->hugedir, - hugepg_tbl[i].file_id); -#endif - hugepg_tbl[i].filepath[sizeof(hugepg_tbl[i].filepath) - 1] = '\0'; - } -#ifndef RTE_ARCH_64 - /* for 32-bit systems, don't remap 1G and 16G pages, just reuse - * original map address as final map address. - */ - else if ((hugepage_sz == RTE_PGSIZE_1G) - || (hugepage_sz == RTE_PGSIZE_16G)) { - hugepg_tbl[i].final_va = hugepg_tbl[i].orig_va; - hugepg_tbl[i].orig_va = NULL; - continue; - } -#endif - -#ifndef RTE_EAL_SINGLE_FILE_SEGMENTS - else if (vma_len == 0) { - unsigned j, num_pages; - - /* reserve a virtual area for next contiguous - * physical block: count the number of - * contiguous physical pages. */ - for (j = i+1; j < hpi->num_pages[0] ; j++) { -#ifdef RTE_ARCH_PPC_64 - /* The physical addresses are sorted in - * descending order on PPC64 */ - if (hugepg_tbl[j].physaddr != - hugepg_tbl[j-1].physaddr - hugepage_sz) - break; -#else - if (hugepg_tbl[j].physaddr != - hugepg_tbl[j-1].physaddr + hugepage_sz) - break; -#endif - } - num_pages = j - i; - vma_len = num_pages * hugepage_sz; - - /* get the biggest virtual memory area up to - * vma_len. If it fails, vma_addr is NULL, so - * let the kernel provide the address. */ - vma_addr = get_virtual_area(&vma_len, hpi->hugepage_sz); - if (vma_addr == NULL) - vma_len = hugepage_sz; - } -#endif - - /* try to create hugepage file */ - fd = open(hugepg_tbl[i].filepath, O_CREAT | O_RDWR, 0755); - if (fd < 0) { - RTE_LOG(ERR, EAL, "%s(): open failed: %s\n", __func__, - strerror(errno)); - return -1; - } - - virtaddr = mmap(vma_addr, hugepage_sz, PROT_READ | PROT_WRITE, - MAP_SHARED, fd, 0); - if (virtaddr == MAP_FAILED) { - RTE_LOG(ERR, EAL, "%s(): mmap failed: %s\n", __func__, - strerror(errno)); - close(fd); - return -1; - } - - if (orig) { - hugepg_tbl[i].orig_va = virtaddr; - memset(virtaddr, 0, hugepage_sz); - } - else { - hugepg_tbl[i].final_va = virtaddr; - } - - /* set shared flock on the file. */ - if (flock(fd, LOCK_SH | LOCK_NB) == -1) { - RTE_LOG(ERR, EAL, "%s(): Locking file failed:%s \n", - __func__, strerror(errno)); - close(fd); - return -1; - } - - close(fd); - - vma_addr = (char *)vma_addr + hugepage_sz; - vma_len -= hugepage_sz; - } - return 0; -} - -#ifdef RTE_EAL_SINGLE_FILE_SEGMENTS - -/* - * Remaps all hugepages into single file segments - */ -static int -remap_all_hugepages(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi) -{ - int fd; - unsigned i = 0, j, num_pages, page_idx = 0; - void *vma_addr = NULL, *old_addr = NULL, *page_addr = NULL; - size_t vma_len = 0; - size_t hugepage_sz = hpi->hugepage_sz; - size_t total_size, offset; - char filepath[MAX_HUGEPAGE_PATH]; - phys_addr_t physaddr; - int socket; - - while (i < hpi->num_pages[0]) { - -#ifndef RTE_ARCH_64 - /* for 32-bit systems, don't remap 1G pages and 16G pages, - * just reuse original map address as final map address. - */ - if ((hugepage_sz == RTE_PGSIZE_1G) - || (hugepage_sz == RTE_PGSIZE_16G)) { - hugepg_tbl[i].final_va = hugepg_tbl[i].orig_va; - hugepg_tbl[i].orig_va = NULL; - i++; - continue; - } -#endif - - /* reserve a virtual area for next contiguous - * physical block: count the number of - * contiguous physical pages. */ - for (j = i+1; j < hpi->num_pages[0] ; j++) { -#ifdef RTE_ARCH_PPC_64 - /* The physical addresses are sorted in descending - * order on PPC64 */ - if (hugepg_tbl[j].physaddr != - hugepg_tbl[j-1].physaddr - hugepage_sz) - break; -#else - if (hugepg_tbl[j].physaddr != - hugepg_tbl[j-1].physaddr + hugepage_sz) - break; -#endif - } - num_pages = j - i; - vma_len = num_pages * hugepage_sz; - - socket = hugepg_tbl[i].socket_id; - - /* get the biggest virtual memory area up to - * vma_len. If it fails, vma_addr is NULL, so - * let the kernel provide the address. */ - vma_addr = get_virtual_area(&vma_len, hpi->hugepage_sz); - - /* If we can't find a big enough virtual area, work out how many pages - * we are going to get */ - if (vma_addr == NULL) - j = i + 1; - else if (vma_len != num_pages * hugepage_sz) { - num_pages = vma_len / hugepage_sz; - j = i + num_pages; - - } - - hugepg_tbl[page_idx].file_id = page_idx; - eal_get_hugefile_path(filepath, - sizeof(filepath), - hpi->hugedir, - hugepg_tbl[page_idx].file_id); - - /* try to create hugepage file */ - fd = open(filepath, O_CREAT | O_RDWR, 0755); - if (fd < 0) { - RTE_LOG(ERR, EAL, "%s(): open failed: %s\n", __func__, strerror(errno)); - return -1; - } - - total_size = 0; - for (;i < j; i++) { - - /* unmap current segment */ - if (total_size > 0) - munmap(vma_addr, total_size); - - /* unmap original page */ - munmap(hugepg_tbl[i].orig_va, hugepage_sz); - unlink(hugepg_tbl[i].filepath); - - total_size += hugepage_sz; - - old_addr = vma_addr; - - /* map new, bigger segment */ - vma_addr = mmap(vma_addr, total_size, - PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); - - if (vma_addr == MAP_FAILED || vma_addr != old_addr) { - RTE_LOG(ERR, EAL, "%s(): mmap failed: %s\n", __func__, strerror(errno)); - close(fd); - return -1; - } - - /* touch the page. this is needed because kernel postpones mapping - * creation until the first page fault. with this, we pin down - * the page and it is marked as used and gets into process' pagemap. - */ - for (offset = 0; offset < total_size; offset += hugepage_sz) - *((volatile uint8_t*) RTE_PTR_ADD(vma_addr, offset)); - } - - /* set shared flock on the file. */ - if (flock(fd, LOCK_SH | LOCK_NB) == -1) { - RTE_LOG(ERR, EAL, "%s(): Locking file failed:%s \n", - __func__, strerror(errno)); - close(fd); - return -1; - } - - snprintf(hugepg_tbl[page_idx].filepath, MAX_HUGEPAGE_PATH, "%s", - filepath); - - physaddr = rte_mem_virt2phy(vma_addr); - - if (physaddr == RTE_BAD_PHYS_ADDR) - return -1; - - hugepg_tbl[page_idx].final_va = vma_addr; - - hugepg_tbl[page_idx].physaddr = physaddr; - - hugepg_tbl[page_idx].repeated = num_pages; - - hugepg_tbl[page_idx].socket_id = socket; - - close(fd); - - /* verify the memory segment - that is, check that every VA corresponds - * to the physical address we expect to see - */ - for (offset = 0; offset < vma_len; offset += hugepage_sz) { - uint64_t expected_physaddr; - - expected_physaddr = hugepg_tbl[page_idx].physaddr + offset; - page_addr = RTE_PTR_ADD(vma_addr, offset); - physaddr = rte_mem_virt2phy(page_addr); - - if (physaddr != expected_physaddr) { - RTE_LOG(ERR, EAL, "Segment sanity check failed: wrong physaddr " - "at %p (offset 0x%" PRIx64 ": 0x%" PRIx64 - " (expected 0x%" PRIx64 ")\n", - page_addr, offset, physaddr, expected_physaddr); - return -1; - } - } - - /* zero out the whole segment */ - memset(hugepg_tbl[page_idx].final_va, 0, total_size); - - page_idx++; - } - - /* zero out the rest */ - memset(&hugepg_tbl[page_idx], 0, (hpi->num_pages[0] - page_idx) * sizeof(struct hugepage_file)); - return page_idx; -} -#else/* RTE_EAL_SINGLE_FILE_SEGMENTS=n */ - -/* Unmap all hugepages from original mapping */ -static int -unmap_all_hugepages_orig(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi) -{ - unsigned i; - for (i = 0; i < hpi->num_pages[0]; i++) { - if (hugepg_tbl[i].orig_va) { - munmap(hugepg_tbl[i].orig_va, hpi->hugepage_sz); - hugepg_tbl[i].orig_va = NULL; - } - } - return 0; -} -#endif /* RTE_EAL_SINGLE_FILE_SEGMENTS */ - -/* - * Parse /proc/self/numa_maps to get the NUMA socket ID for each huge - * page. - */ -static int -find_numasocket(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi) -{ - int socket_id; - char *end, *nodestr; - unsigned i, hp_count = 0; - uint64_t virt_addr; - char buf[BUFSIZ]; - char hugedir_str[PATH_MAX]; - FILE *f; - - f = fopen("/proc/self/numa_maps", "r"); - if (f == NULL) { - RTE_LOG(NOTICE, EAL, "cannot open /proc/self/numa_maps," - " consider that all memory is in socket_id 0\n"); - return 0; - } - - snprintf(hugedir_str, sizeof(hugedir_str), - "%s/%s", hpi->hugedir, internal_config.hugefile_prefix); - - /* parse numa map */ - while (fgets(buf, sizeof(buf), f) != NULL) { - - /* ignore non huge page */ - if (strstr(buf, " huge ") == NULL && - strstr(buf, hugedir_str) == NULL) - continue; - - /* get zone addr */ - virt_addr = strtoull(buf, &end, 16); - if (virt_addr == 0 || end == buf) { - RTE_LOG(ERR, EAL, "%s(): error in numa_maps parsing\n", __func__); - goto error; - } - - /* get node id (socket id) */ - nodestr = strstr(buf, " N"); - if (nodestr == NULL) { - RTE_LOG(ERR, EAL, "%s(): error in numa_maps parsing\n", __func__); - goto error; - } - nodestr += 2; - end = strstr(nodestr, "="); - if (end == NULL) { - RTE_LOG(ERR, EAL, "%s(): error in numa_maps parsing\n", __func__); - goto error; - } - end[0] = '\0'; - end = NULL; - - socket_id = strtoul(nodestr, &end, 0); - if ((nodestr[0] == '\0') || (end == NULL) || (*end != '\0')) { - RTE_LOG(ERR, EAL, "%s(): error in numa_maps parsing\n", __func__); - goto error; - } - - /* if we find this page in our mappings, set socket_id */ - for (i = 0; i < hpi->num_pages[0]; i++) { - void *va = (void *)(unsigned long)virt_addr; - if (hugepg_tbl[i].orig_va == va) { - hugepg_tbl[i].socket_id = socket_id; - hp_count++; - } - } - } - - if (hp_count < hpi->num_pages[0]) - goto error; - - fclose(f); - return 0; - -error: - fclose(f); - return -1; -} - -/* - * Sort the hugepg_tbl by physical address (lower addresses first on x86, - * higher address first on powerpc). We use a slow algorithm, but we won't - * have millions of pages, and this is only done at init time. - */ -static int -sort_by_physaddr(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi) -{ - unsigned i, j; - int compare_idx; - uint64_t compare_addr; - struct hugepage_file tmp; - - for (i = 0; i < hpi->num_pages[0]; i++) { - compare_addr = 0; - compare_idx = -1; - - /* - * browse all entries starting at 'i', and find the - * entry with the smallest addr - */ - for (j=i; j< hpi->num_pages[0]; j++) { - - if (compare_addr == 0 || -#ifdef RTE_ARCH_PPC_64 - hugepg_tbl[j].physaddr > compare_addr) { -#else - hugepg_tbl[j].physaddr < compare_addr) { -#endif - compare_addr = hugepg_tbl[j].physaddr; - compare_idx = j; - } - } - - /* should not happen */ - if (compare_idx == -1) { - RTE_LOG(ERR, EAL, "%s(): error in physaddr sorting\n", __func__); - return -1; - } - - /* swap the 2 entries in the table */ - memcpy(&tmp, &hugepg_tbl[compare_idx], - sizeof(struct hugepage_file)); - memcpy(&hugepg_tbl[compare_idx], &hugepg_tbl[i], - sizeof(struct hugepage_file)); - memcpy(&hugepg_tbl[i], &tmp, sizeof(struct hugepage_file)); - } - return 0; -} - -/* - * Uses mmap to create a shared memory area for storage of data - * Used in this file to store the hugepage file map on disk - */ -static void * -create_shared_memory(const char *filename, const size_t mem_size) -{ - void *retval; - int fd = open(filename, O_CREAT | O_RDWR, 0666); - if (fd < 0) - return NULL; - if (ftruncate(fd, mem_size) < 0) { - close(fd); - return NULL; - } - retval = mmap(NULL, mem_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); - close(fd); - return retval; -} - -/* - * this copies *active* hugepages from one hugepage table to another. - * destination is typically the shared memory. - */ -static int -copy_hugepages_to_shared_mem(struct hugepage_file * dst, int dest_size, - const struct hugepage_file * src, int src_size) -{ - int src_pos, dst_pos = 0; - - for (src_pos = 0; src_pos < src_size; src_pos++) { - if (src[src_pos].final_va != NULL) { - /* error on overflow attempt */ - if (dst_pos == dest_size) - return -1; - memcpy(&dst[dst_pos], &src[src_pos], sizeof(struct hugepage_file)); - dst_pos++; - } - } - return 0; -} - -static int -unlink_hugepage_files(struct hugepage_file *hugepg_tbl, - unsigned num_hp_info) -{ - unsigned socket, size; - int page, nrpages = 0; - - /* get total number of hugepages */ - for (size = 0; size < num_hp_info; size++) - for (socket = 0; socket < RTE_MAX_NUMA_NODES; socket++) - nrpages += - internal_config.hugepage_info[size].num_pages[socket]; - - for (page = 0; page < nrpages; page++) { - struct hugepage_file *hp = &hugepg_tbl[page]; - - if (hp->final_va != NULL && unlink(hp->filepath)) { - RTE_LOG(WARNING, EAL, "%s(): Removing %s failed: %s\n", - __func__, hp->filepath, strerror(errno)); - } - } - return 0; -} - -/* - * unmaps hugepages that are not going to be used. since we originally allocate - * ALL hugepages (not just those we need), additional unmapping needs to be done. - */ -static int -unmap_unneeded_hugepages(struct hugepage_file *hugepg_tbl, - struct hugepage_info *hpi, - unsigned num_hp_info) -{ - unsigned socket, size; - int page, nrpages = 0; - - /* get total number of hugepages */ - for (size = 0; size < num_hp_info; size++) - for (socket = 0; socket < RTE_MAX_NUMA_NODES; socket++) - nrpages += internal_config.hugepage_info[size].num_pages[socket]; - - for (size = 0; size < num_hp_info; size++) { - for (socket = 0; socket < RTE_MAX_NUMA_NODES; socket++) { - unsigned pages_found = 0; - - /* traverse until we have unmapped all the unused pages */ - for (page = 0; page < nrpages; page++) { - struct hugepage_file *hp = &hugepg_tbl[page]; - -#ifdef RTE_EAL_SINGLE_FILE_SEGMENTS - /* if this page was already cleared */ - if (hp->final_va == NULL) - continue; -#endif - - /* find a page that matches the criteria */ - if ((hp->size == hpi[size].hugepage_sz) && - (hp->socket_id == (int) socket)) { - - /* if we skipped enough pages, unmap the rest */ - if (pages_found == hpi[size].num_pages[socket]) { - uint64_t unmap_len; - -#ifdef RTE_EAL_SINGLE_FILE_SEGMENTS - unmap_len = hp->size * hp->repeated; -#else - unmap_len = hp->size; -#endif - - /* get start addr and len of the remaining segment */ - munmap(hp->final_va, (size_t) unmap_len); - - hp->final_va = NULL; - if (unlink(hp->filepath) == -1) { - RTE_LOG(ERR, EAL, "%s(): Removing %s failed: %s\n", - __func__, hp->filepath, strerror(errno)); - return -1; - } - } -#ifdef RTE_EAL_SINGLE_FILE_SEGMENTS - /* else, check how much do we need to map */ - else { - int nr_pg_left = - hpi[size].num_pages[socket] - pages_found; - - /* if we need enough memory to fit into the segment */ - if (hp->repeated <= nr_pg_left) { - pages_found += hp->repeated; - } - /* truncate the segment */ - else { - uint64_t final_size = nr_pg_left * hp->size; - uint64_t seg_size = hp->repeated * hp->size; - - void * unmap_va = RTE_PTR_ADD(hp->final_va, - final_size); - int fd; - - munmap(unmap_va, seg_size - final_size); - - fd = open(hp->filepath, O_RDWR); - if (fd < 0) { - RTE_LOG(ERR, EAL, "Cannot open %s: %s\n", - hp->filepath, strerror(errno)); - return -1; - } - if (ftruncate(fd, final_size) < 0) { - RTE_LOG(ERR, EAL, "Cannot truncate %s: %s\n", - hp->filepath, strerror(errno)); - return -1; - } - close(fd); - - pages_found += nr_pg_left; - hp->repeated = nr_pg_left; - } - } -#else - /* else, lock the page and skip */ - else - pages_found++; -#endif - - } /* match page */ - } /* foreach page */ - } /* foreach socket */ - } /* foreach pagesize */ - - return 0; -} - -static inline uint64_t -get_socket_mem_size(int socket) -{ - uint64_t size = 0; - unsigned i; - - for (i = 0; i < internal_config.num_hugepage_sizes; i++){ - struct hugepage_info *hpi = &internal_config.hugepage_info[i]; - if (hpi->hugedir != NULL) - size += hpi->hugepage_sz * hpi->num_pages[socket]; - } - - return size; -} - -/* - * This function is a NUMA-aware equivalent of calc_num_pages. - * It takes in the list of hugepage sizes and the - * number of pages thereof, and calculates the best number of - * pages of each size to fulfill the request for <memory> ram - */ -static int -calc_num_pages_per_socket(uint64_t * memory, - struct hugepage_info *hp_info, - struct hugepage_info *hp_used, - unsigned num_hp_info) -{ - unsigned socket, j, i = 0; - unsigned requested, available; - int total_num_pages = 0; - uint64_t remaining_mem, cur_mem; - uint64_t total_mem = internal_config.memory; - - if (num_hp_info == 0) - return -1; - - /* if specific memory amounts per socket weren't requested */ - if (internal_config.force_sockets == 0) { - int cpu_per_socket[RTE_MAX_NUMA_NODES]; - size_t default_size, total_size; - unsigned lcore_id; - - /* Compute number of cores per socket */ - memset(cpu_per_socket, 0, sizeof(cpu_per_socket)); - RTE_LCORE_FOREACH(lcore_id) { - cpu_per_socket[rte_lcore_to_socket_id(lcore_id)]++; - } - - /* - * Automatically spread requested memory amongst detected sockets according - * to number of cores from cpu mask present on each socket - */ - total_size = internal_config.memory; - for (socket = 0; socket < RTE_MAX_NUMA_NODES && total_size != 0; socket++) { - - /* Set memory amount per socket */ - default_size = (internal_config.memory * cpu_per_socket[socket]) - / rte_lcore_count(); - - /* Limit to maximum available memory on socket */ - default_size = RTE_MIN(default_size, get_socket_mem_size(socket)); - - /* Update sizes */ - memory[socket] = default_size; - total_size -= default_size; - } - - /* - * If some memory is remaining, try to allocate it by getting all - * available memory from sockets, one after the other - */ - for (socket = 0; socket < RTE_MAX_NUMA_NODES && total_size != 0; socket++) { - /* take whatever is available */ - default_size = RTE_MIN(get_socket_mem_size(socket) - memory[socket], - total_size); - - /* Update sizes */ - memory[socket] += default_size; - total_size -= default_size; - } - } - - for (socket = 0; socket < RTE_MAX_NUMA_NODES && total_mem != 0; socket++) { - /* skips if the memory on specific socket wasn't requested */ - for (i = 0; i < num_hp_info && memory[socket] != 0; i++){ - hp_used[i].hugedir = hp_info[i].hugedir; - hp_used[i].num_pages[socket] = RTE_MIN( - memory[socket] / hp_info[i].hugepage_sz, - hp_info[i].num_pages[socket]); - - cur_mem = hp_used[i].num_pages[socket] * - hp_used[i].hugepage_sz; - - memory[socket] -= cur_mem; - total_mem -= cur_mem; - - total_num_pages += hp_used[i].num_pages[socket]; - - /* check if we have met all memory requests */ - if (memory[socket] == 0) - break; - - /* check if we have any more pages left at this size, if so - * move on to next size */ - if (hp_used[i].num_pages[socket] == hp_info[i].num_pages[socket]) - continue; - /* At this point we know that there are more pages available that are - * bigger than the memory we want, so lets see if we can get enough - * from other page sizes. - */ - remaining_mem = 0; - for (j = i+1; j < num_hp_info; j++) - remaining_mem += hp_info[j].hugepage_sz * - hp_info[j].num_pages[socket]; - - /* is there enough other memory, if not allocate another page and quit */ - if (remaining_mem < memory[socket]){ - cur_mem = RTE_MIN(memory[socket], - hp_info[i].hugepage_sz); - memory[socket] -= cur_mem; - total_mem -= cur_mem; - hp_used[i].num_pages[socket]++; - total_num_pages++; - break; /* we are done with this socket*/ - } - } - /* if we didn't satisfy all memory requirements per socket */ - if (memory[socket] > 0) { - /* to prevent icc errors */ - requested = (unsigned) (internal_config.socket_mem[socket] / - 0x100000); - available = requested - - ((unsigned) (memory[socket] / 0x100000)); - RTE_LOG(ERR, EAL, "Not enough memory available on socket %u! " - "Requested: %uMB, available: %uMB\n", socket, - requested, available); - return -1; - } - } - - /* if we didn't satisfy total memory requirements */ - if (total_mem > 0) { - requested = (unsigned) (internal_config.memory / 0x100000); - available = requested - (unsigned) (total_mem / 0x100000); - RTE_LOG(ERR, EAL, "Not enough memory available! Requested: %uMB," - " available: %uMB\n", requested, available); - return -1; - } - return total_num_pages; -} - -/* - * Prepare physical memory mapping: fill configuration structure with - * these infos, return 0 on success. - * 1. map N huge pages in separate files in hugetlbfs - * 2. find associated physical addr - * 3. find associated NUMA socket ID - * 4. sort all huge pages by physical address - * 5. remap these N huge pages in the correct order - * 6. unmap the first mapping - * 7. fill memsegs in configuration with contiguous zones - */ -int -rte_eal_hugepage_init(void) -{ - struct rte_mem_config *mcfg; - struct hugepage_file *hugepage, *tmp_hp = NULL; - struct hugepage_info used_hp[MAX_HUGEPAGE_SIZES]; - - uint64_t memory[RTE_MAX_NUMA_NODES]; - - unsigned hp_offset; - int i, j, new_memseg; - int nr_hugefiles, nr_hugepages = 0; - void *addr; -#ifdef RTE_EAL_SINGLE_FILE_SEGMENTS - int new_pages_count[MAX_HUGEPAGE_SIZES]; -#endif - - test_proc_pagemap_readable(); - - memset(used_hp, 0, sizeof(used_hp)); - - /* get pointer to global configuration */ - mcfg = rte_eal_get_configuration()->mem_config; - - /* hugetlbfs can be disabled */ - if (internal_config.no_hugetlbfs) { - addr = mmap(NULL, internal_config.memory, PROT_READ | PROT_WRITE, - MAP_PRIVATE | MAP_ANONYMOUS, 0, 0); - if (addr == MAP_FAILED) { - RTE_LOG(ERR, EAL, "%s: mmap() failed: %s\n", __func__, - strerror(errno)); - return -1; - } - mcfg->memseg[0].phys_addr = (phys_addr_t)(uintptr_t)addr; - mcfg->memseg[0].addr = addr; - mcfg->memseg[0].hugepage_sz = RTE_PGSIZE_4K; - mcfg->memseg[0].len = internal_config.memory; - mcfg->memseg[0].socket_id = 0; - return 0; - } - -/* check if app runs on Xen Dom0 */ - if (internal_config.xen_dom0_support) { -#ifdef RTE_LIBRTE_XEN_DOM0 - /* use dom0_mm kernel driver to init memory */ - if (rte_xen_dom0_memory_init() < 0) - return -1; - else - return 0; -#endif - } - - /* calculate total number of hugepages available. at this point we haven't - * yet started sorting them so they all are on socket 0 */ - for (i = 0; i < (int) internal_config.num_hugepage_sizes; i++) { - /* meanwhile, also initialize used_hp hugepage sizes in used_hp */ - used_hp[i].hugepage_sz = internal_config.hugepage_info[i].hugepage_sz; - - nr_hugepages += internal_config.hugepage_info[i].num_pages[0]; - } - - /* - * allocate a memory area for hugepage table. - * this isn't shared memory yet. due to the fact that we need some - * processing done on these pages, shared memory will be created - * at a later stage. - */ - tmp_hp = malloc(nr_hugepages * sizeof(struct hugepage_file)); - if (tmp_hp == NULL) - goto fail; - - memset(tmp_hp, 0, nr_hugepages * sizeof(struct hugepage_file)); - - hp_offset = 0; /* where we start the current page size entries */ - - /* map all hugepages and sort them */ - for (i = 0; i < (int)internal_config.num_hugepage_sizes; i ++){ - struct hugepage_info *hpi; - - /* - * we don't yet mark hugepages as used at this stage, so - * we just map all hugepages available to the system - * all hugepages are still located on socket 0 - */ - hpi = &internal_config.hugepage_info[i]; - - if (hpi->num_pages[0] == 0) - continue; - - /* map all hugepages available */ - if (map_all_hugepages(&tmp_hp[hp_offset], hpi, 1) < 0){ - RTE_LOG(DEBUG, EAL, "Failed to mmap %u MB hugepages\n", - (unsigned)(hpi->hugepage_sz / 0x100000)); - goto fail; - } - - /* find physical addresses and sockets for each hugepage */ - if (find_physaddrs(&tmp_hp[hp_offset], hpi) < 0){ - RTE_LOG(DEBUG, EAL, "Failed to find phys addr for %u MB pages\n", - (unsigned)(hpi->hugepage_sz / 0x100000)); - goto fail; - } - - if (find_numasocket(&tmp_hp[hp_offset], hpi) < 0){ - RTE_LOG(DEBUG, EAL, "Failed to find NUMA socket for %u MB pages\n", - (unsigned)(hpi->hugepage_sz / 0x100000)); - goto fail; - } - - if (sort_by_physaddr(&tmp_hp[hp_offset], hpi) < 0) - goto fail; - -#ifdef RTE_EAL_SINGLE_FILE_SEGMENTS - /* remap all hugepages into single file segments */ - new_pages_count[i] = remap_all_hugepages(&tmp_hp[hp_offset], hpi); - if (new_pages_count[i] < 0){ - RTE_LOG(DEBUG, EAL, "Failed to remap %u MB pages\n", - (unsigned)(hpi->hugepage_sz / 0x100000)); - goto fail; - } - - /* we have processed a num of hugepages of this size, so inc offset */ - hp_offset += new_pages_count[i]; -#else - /* remap all hugepages */ - if (map_all_hugepages(&tmp_hp[hp_offset], hpi, 0) < 0){ - RTE_LOG(DEBUG, EAL, "Failed to remap %u MB pages\n", - (unsigned)(hpi->hugepage_sz / 0x100000)); - goto fail; - } - - /* unmap original mappings */ - if (unmap_all_hugepages_orig(&tmp_hp[hp_offset], hpi) < 0) - goto fail; - - /* we have processed a num of hugepages of this size, so inc offset */ - hp_offset += hpi->num_pages[0]; -#endif - } - -#ifdef RTE_EAL_SINGLE_FILE_SEGMENTS - nr_hugefiles = 0; - for (i = 0; i < (int) internal_config.num_hugepage_sizes; i++) { - nr_hugefiles += new_pages_count[i]; - } -#else - nr_hugefiles = nr_hugepages; -#endif - - - /* clean out the numbers of pages */ - for (i = 0; i < (int) internal_config.num_hugepage_sizes; i++) - for (j = 0; j < RTE_MAX_NUMA_NODES; j++) - internal_config.hugepage_info[i].num_pages[j] = 0; - - /* get hugepages for each socket */ - for (i = 0; i < nr_hugefiles; i++) { - int socket = tmp_hp[i].socket_id; - - /* find a hugepage info with right size and increment num_pages */ - const int nb_hpsizes = RTE_MIN(MAX_HUGEPAGE_SIZES, - (int)internal_config.num_hugepage_sizes); - for (j = 0; j < nb_hpsizes; j++) { - if (tmp_hp[i].size == - internal_config.hugepage_info[j].hugepage_sz) { -#ifdef RTE_EAL_SINGLE_FILE_SEGMENTS - internal_config.hugepage_info[j].num_pages[socket] += - tmp_hp[i].repeated; -#else - internal_config.hugepage_info[j].num_pages[socket]++; -#endif - } - } - } - - /* make a copy of socket_mem, needed for number of pages calculation */ - for (i = 0; i < RTE_MAX_NUMA_NODES; i++) - memory[i] = internal_config.socket_mem[i]; - - /* calculate final number of pages */ - nr_hugepages = calc_num_pages_per_socket(memory, - internal_config.hugepage_info, used_hp, - internal_config.num_hugepage_sizes); - - /* error if not enough memory available */ - if (nr_hugepages < 0) - goto fail; - - /* reporting in! */ - for (i = 0; i < (int) internal_config.num_hugepage_sizes; i++) { - for (j = 0; j < RTE_MAX_NUMA_NODES; j++) { - if (used_hp[i].num_pages[j] > 0) { - RTE_LOG(DEBUG, EAL, - "Requesting %u pages of size %uMB" - " from socket %i\n", - used_hp[i].num_pages[j], - (unsigned) - (used_hp[i].hugepage_sz / 0x100000), - j); - } - } - } - - /* create shared memory */ - hugepage = create_shared_memory(eal_hugepage_info_path(), - nr_hugefiles * sizeof(struct hugepage_file)); - - if (hugepage == NULL) { - RTE_LOG(ERR, EAL, "Failed to create shared memory!\n"); - goto fail; - } - memset(hugepage, 0, nr_hugefiles * sizeof(struct hugepage_file)); - - /* - * unmap pages that we won't need (looks at used_hp). - * also, sets final_va to NULL on pages that were unmapped. - */ - if (unmap_unneeded_hugepages(tmp_hp, used_hp, - internal_config.num_hugepage_sizes) < 0) { - RTE_LOG(ERR, EAL, "Unmapping and locking hugepages failed!\n"); - goto fail; - } - - /* - * copy stuff from malloc'd hugepage* to the actual shared memory. - * this procedure only copies those hugepages that have final_va - * not NULL. has overflow protection. - */ - if (copy_hugepages_to_shared_mem(hugepage, nr_hugefiles, - tmp_hp, nr_hugefiles) < 0) { - RTE_LOG(ERR, EAL, "Copying tables to shared memory failed!\n"); - goto fail; - } - - /* free the hugepage backing files */ - if (internal_config.hugepage_unlink && - unlink_hugepage_files(tmp_hp, internal_config.num_hugepage_sizes) < 0) { - RTE_LOG(ERR, EAL, "Unlinking hugepage files failed!\n"); - goto fail; - } - - /* free the temporary hugepage table */ - free(tmp_hp); - tmp_hp = NULL; - - /* find earliest free memseg - this is needed because in case of IVSHMEM, - * segments might have already been initialized */ - for (j = 0; j < RTE_MAX_MEMSEG; j++) - if (mcfg->memseg[j].addr == NULL) { - /* move to previous segment and exit loop */ - j--; - break; - } - - for (i = 0; i < nr_hugefiles; i++) { - new_memseg = 0; - - /* if this is a new section, create a new memseg */ - if (i == 0) - new_memseg = 1; - else if (hugepage[i].socket_id != hugepage[i-1].socket_id) - new_memseg = 1; - else if (hugepage[i].size != hugepage[i-1].size) - new_memseg = 1; - -#ifdef RTE_ARCH_PPC_64 - /* On PPC64 architecture, the mmap always start from higher - * virtual address to lower address. Here, both the physical - * address and virtual address are in descending order */ - else if ((hugepage[i-1].physaddr - hugepage[i].physaddr) != - hugepage[i].size) - new_memseg = 1; - else if (((unsigned long)hugepage[i-1].final_va - - (unsigned long)hugepage[i].final_va) != hugepage[i].size) - new_memseg = 1; -#else - else if ((hugepage[i].physaddr - hugepage[i-1].physaddr) != - hugepage[i].size) - new_memseg = 1; - else if (((unsigned long)hugepage[i].final_va - - (unsigned long)hugepage[i-1].final_va) != hugepage[i].size) - new_memseg = 1; -#endif - - if (new_memseg) { - j += 1; - if (j == RTE_MAX_MEMSEG) - break; - - mcfg->memseg[j].phys_addr = hugepage[i].physaddr; - mcfg->memseg[j].addr = hugepage[i].final_va; -#ifdef RTE_EAL_SINGLE_FILE_SEGMENTS - mcfg->memseg[j].len = hugepage[i].size * hugepage[i].repeated; -#else - mcfg->memseg[j].len = hugepage[i].size; -#endif - mcfg->memseg[j].socket_id = hugepage[i].socket_id; - mcfg->memseg[j].hugepage_sz = hugepage[i].size; - } - /* continuation of previous memseg */ - else { -#ifdef RTE_ARCH_PPC_64 - /* Use the phy and virt address of the last page as segment - * address for IBM Power architecture */ - mcfg->memseg[j].phys_addr = hugepage[i].physaddr; - mcfg->memseg[j].addr = hugepage[i].final_va; -#endif - mcfg->memseg[j].len += mcfg->memseg[j].hugepage_sz; - } - hugepage[i].memseg_id = j; - } - - if (i < nr_hugefiles) { - RTE_LOG(ERR, EAL, "Can only reserve %d pages " - "from %d requested\n" - "Current %s=%d is not enough\n" - "Please either increase it or request less amount " - "of memory.\n", - i, nr_hugefiles, RTE_STR(CONFIG_RTE_MAX_MEMSEG), - RTE_MAX_MEMSEG); - return -ENOMEM; - } - - return 0; - -fail: - if (tmp_hp) - free(tmp_hp); - return -1; -} - -/* - * uses fstat to report the size of a file on disk - */ -static off_t -getFileSize(int fd) -{ - struct stat st; - if (fstat(fd, &st) < 0) - return 0; - return st.st_size; -} - -/* - * This creates the memory mappings in the secondary process to match that of - * the server process. It goes through each memory segment in the DPDK runtime - * configuration and finds the hugepages which form that segment, mapping them - * in order to form a contiguous block in the virtual memory space - */ -int -rte_eal_hugepage_attach(void) -{ - const struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config; - const struct hugepage_file *hp = NULL; - unsigned num_hp = 0; - unsigned i, s = 0; /* s used to track the segment number */ - off_t size; - int fd, fd_zero = -1, fd_hugepage = -1; - - if (aslr_enabled() > 0) { - RTE_LOG(WARNING, EAL, "WARNING: Address Space Layout Randomization " - "(ASLR) is enabled in the kernel.\n"); - RTE_LOG(WARNING, EAL, " This may cause issues with mapping memory " - "into secondary processes\n"); - } - - test_proc_pagemap_readable(); - - if (internal_config.xen_dom0_support) { -#ifdef RTE_LIBRTE_XEN_DOM0 - if (rte_xen_dom0_memory_attach() < 0) { - RTE_LOG(ERR, EAL,"Failed to attach memory setments of primay " - "process\n"); - return -1; - } - return 0; -#endif - } - - fd_zero = open("/dev/zero", O_RDONLY); - if (fd_zero < 0) { - RTE_LOG(ERR, EAL, "Could not open /dev/zero\n"); - goto error; - } - fd_hugepage = open(eal_hugepage_info_path(), O_RDONLY); - if (fd_hugepage < 0) { - RTE_LOG(ERR, EAL, "Could not open %s\n", eal_hugepage_info_path()); - goto error; - } - - /* map all segments into memory to make sure we get the addrs */ - for (s = 0; s < RTE_MAX_MEMSEG; ++s) { - void *base_addr; - - /* - * the first memory segment with len==0 is the one that - * follows the last valid segment. - */ - if (mcfg->memseg[s].len == 0) - break; - -#ifdef RTE_LIBRTE_IVSHMEM - /* - * if segment has ioremap address set, it's an IVSHMEM segment and - * doesn't need mapping as it was already mapped earlier - */ - if (mcfg->memseg[s].ioremap_addr != 0) - continue; -#endif - - /* - * fdzero is mmapped to get a contiguous block of virtual - * addresses of the appropriate memseg size. - * use mmap to get identical addresses as the primary process. - */ - base_addr = mmap(mcfg->memseg[s].addr, mcfg->memseg[s].len, - PROT_READ, MAP_PRIVATE, fd_zero, 0); - if (base_addr == MAP_FAILED || - base_addr != mcfg->memseg[s].addr) { - RTE_LOG(ERR, EAL, "Could not mmap %llu bytes " - "in /dev/zero to requested address [%p]: '%s'\n", - (unsigned long long)mcfg->memseg[s].len, - mcfg->memseg[s].addr, strerror(errno)); - if (aslr_enabled() > 0) { - RTE_LOG(ERR, EAL, "It is recommended to " - "disable ASLR in the kernel " - "and retry running both primary " - "and secondary processes\n"); - } - goto error; - } - } - - size = getFileSize(fd_hugepage); - hp = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fd_hugepage, 0); - if (hp == NULL) { - RTE_LOG(ERR, EAL, "Could not mmap %s\n", eal_hugepage_info_path()); - goto error; - } - - num_hp = size / sizeof(struct hugepage_file); - RTE_LOG(DEBUG, EAL, "Analysing %u files\n", num_hp); - - s = 0; - while (s < RTE_MAX_MEMSEG && mcfg->memseg[s].len > 0){ - void *addr, *base_addr; - uintptr_t offset = 0; - size_t mapping_size; -#ifdef RTE_LIBRTE_IVSHMEM - /* - * if segment has ioremap address set, it's an IVSHMEM segment and - * doesn't need mapping as it was already mapped earlier - */ - if (mcfg->memseg[s].ioremap_addr != 0) { - s++; - continue; - } -#endif - /* - * free previously mapped memory so we can map the - * hugepages into the space - */ - base_addr = mcfg->memseg[s].addr; - munmap(base_addr, mcfg->memseg[s].len); - - /* find the hugepages for this segment and map them - * we don't need to worry about order, as the server sorted the - * entries before it did the second mmap of them */ - for (i = 0; i < num_hp && offset < mcfg->memseg[s].len; i++){ - if (hp[i].memseg_id == (int)s){ - fd = open(hp[i].filepath, O_RDWR); - if (fd < 0) { - RTE_LOG(ERR, EAL, "Could not open %s\n", - hp[i].filepath); - goto error; - } -#ifdef RTE_EAL_SINGLE_FILE_SEGMENTS - mapping_size = hp[i].size * hp[i].repeated; -#else - mapping_size = hp[i].size; -#endif - addr = mmap(RTE_PTR_ADD(base_addr, offset), - mapping_size, PROT_READ | PROT_WRITE, - MAP_SHARED, fd, 0); - close(fd); /* close file both on success and on failure */ - if (addr == MAP_FAILED || - addr != RTE_PTR_ADD(base_addr, offset)) { - RTE_LOG(ERR, EAL, "Could not mmap %s\n", - hp[i].filepath); - goto error; - } - offset+=mapping_size; - } - } - RTE_LOG(DEBUG, EAL, "Mapped segment %u of size 0x%llx\n", s, - (unsigned long long)mcfg->memseg[s].len); - s++; - } - /* unmap the hugepage config file, since we are done using it */ - munmap((void *)(uintptr_t)hp, size); - close(fd_zero); - close(fd_hugepage); - return 0; - -error: - if (fd_zero >= 0) - close(fd_zero); - if (fd_hugepage >= 0) - close(fd_hugepage); - return -1; -} |