--- /dev/null
+/*-
+ * 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;
+ }
+
+ /* map the segment, and populate page tables,
+ * the kernel fills this segment with zeros */
+ virtaddr = mmap(vma_addr, hugepage_sz, PROT_READ | PROT_WRITE,
+ MAP_SHARED | MAP_POPULATE, 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;
+ }
+ 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, and populate page tables,
+ * the kernel fills this segment with zeros */
+ vma_addr = mmap(vma_addr, total_size,
+ PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE, 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;
+ }
+ }
+
+ /* 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;
+ }
+ }
+
+ 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;
+}
+
+static int
+cmp_physaddr(const void *a, const void *b)
+{
+#ifndef RTE_ARCH_PPC_64
+ const struct hugepage_file *p1 = (const struct hugepage_file *)a;
+ const struct hugepage_file *p2 = (const struct hugepage_file *)b;
+#else
+ /* PowerPC needs memory sorted in reverse order from x86 */
+ const struct hugepage_file *p1 = (const struct hugepage_file *)b;
+ const struct hugepage_file *p2 = (const struct hugepage_file *)a;
+#endif
+ if (p1->physaddr < p2->physaddr)
+ return -1;
+ else if (p1->physaddr > p2->physaddr)
+ return 1;
+ else
+ 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;
+ }
+
+ qsort(&tmp_hp[hp_offset], hpi->num_pages[0],
+ sizeof(struct hugepage_file), cmp_physaddr);
+
+#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:
+ 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;
+}
Code Review / deb_dpdk.git / blobdiff