#define _FILE_OFFSET_BITS 64
#include <errno.h>
#include <stdarg.h>
+#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include "eal_filesystem.h"
#include "eal_hugepages.h"
+#define PFN_MASK_SIZE 8
+
#ifdef RTE_LIBRTE_XEN_DOM0
int rte_xen_dom0_supported(void)
{
static uint64_t baseaddr_offset;
-static unsigned proc_pagemap_readable;
+static bool phys_addrs_available = true;
#define RANDOMIZE_VA_SPACE_FILE "/proc/sys/kernel/randomize_va_space"
static void
-test_proc_pagemap_readable(void)
+test_phys_addrs_available(void)
{
- int fd = open("/proc/self/pagemap", O_RDONLY);
+ uint64_t tmp;
+ phys_addr_t physaddr;
- if (fd < 0) {
+ physaddr = rte_mem_virt2phy(&tmp);
+ if (physaddr == RTE_BAD_PHYS_ADDR) {
RTE_LOG(ERR, EAL,
- "Cannot open /proc/self/pagemap: %s. "
- "virt2phys address translation will not work\n",
+ "Cannot obtain physical addresses: %s. "
+ "Only vfio will function.\n",
strerror(errno));
- return;
+ phys_addrs_available = false;
}
-
- /* Is readable */
- close(fd);
- proc_pagemap_readable = 1;
}
/* Lock page in physical memory and prevent from swapping. */
phys_addr_t
rte_mem_virt2phy(const void *virtaddr)
{
- int fd;
+ int fd, retval;
uint64_t page, physaddr;
unsigned long virt_pfn;
int page_size;
}
/* Cannot parse /proc/self/pagemap, no need to log errors everywhere */
- if (!proc_pagemap_readable)
+ if (!phys_addrs_available)
return RTE_BAD_PHYS_ADDR;
/* standard page size */
close(fd);
return RTE_BAD_PHYS_ADDR;
}
- if (read(fd, &page, sizeof(uint64_t)) < 0) {
+
+ retval = read(fd, &page, PFN_MASK_SIZE);
+ close(fd);
+ if (retval < 0) {
RTE_LOG(ERR, EAL, "%s(): cannot read /proc/self/pagemap: %s\n",
__func__, strerror(errno));
- close(fd);
+ return RTE_BAD_PHYS_ADDR;
+ } else if (retval != PFN_MASK_SIZE) {
+ RTE_LOG(ERR, EAL, "%s(): read %d bytes from /proc/self/pagemap "
+ "but expected %d:\n",
+ __func__, retval, PFN_MASK_SIZE);
return RTE_BAD_PHYS_ADDR;
}
* the pfn (page frame number) are bits 0-54 (see
* pagemap.txt in linux Documentation)
*/
+ if ((page & 0x7fffffffffffffULL) == 0)
+ return RTE_BAD_PHYS_ADDR;
+
physaddr = ((page & 0x7fffffffffffffULL) * page_size)
+ ((unsigned long)virtaddr % page_size);
- close(fd);
+
return physaddr;
}
static int
find_physaddrs(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi)
{
- unsigned i;
+ unsigned int i;
phys_addr_t addr;
for (i = 0; i < hpi->num_pages[0]; i++) {
return 0;
}
+/*
+ * For each hugepage in hugepg_tbl, fill the physaddr value sequentially.
+ */
+static int
+set_physaddrs(struct hugepage_file *hugepg_tbl, struct hugepage_info *hpi)
+{
+ unsigned int i;
+ static phys_addr_t addr;
+
+ for (i = 0; i < hpi->num_pages[0]; i++) {
+ hugepg_tbl[i].physaddr = addr;
+ addr += hugepg_tbl[i].size;
+ }
+ return 0;
+}
+
/*
* Check whether address-space layout randomization is enabled in
* the kernel. This is important for multi-process as it can prevent
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
continue;
}
#endif
-
-#ifndef RTE_EAL_SINGLE_FILE_SEGMENTS
else if (vma_len == 0) {
unsigned j, num_pages;
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);
+ fd = open(hugepg_tbl[i].filepath, O_CREAT | O_RDWR, 0600);
if (fd < 0) {
RTE_LOG(DEBUG, EAL, "%s(): open failed: %s\n", __func__,
strerror(errno));
return i;
}
-#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)
}
return 0;
}
-#endif /* RTE_EAL_SINGLE_FILE_SEGMENTS */
/*
* Parse /proc/self/numa_maps to get the NUMA socket ID for each huge
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;
+ const struct hugepage_file *p1 = a;
+ const struct hugepage_file *p2 = 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;
+ const struct hugepage_file *p1 = b;
+ const struct hugepage_file *p2 = a;
#endif
if (p1->physaddr < p2->physaddr)
return -1;
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 (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);
__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
+ } else {
+ /* lock the page and skip */
pages_found++;
-#endif
+ }
} /* match page */
} /* foreach page */
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();
+ test_phys_addrs_available();
memset(used_hp, 0, sizeof(used_hp));
pages_old = hpi->num_pages[0];
pages_new = map_all_hugepages(&tmp_hp[hp_offset], hpi, 1);
if (pages_new < pages_old) {
-#ifdef RTE_EAL_SINGLE_FILE_SEGMENTS
- RTE_LOG(ERR, EAL,
- "%d not %d hugepages of size %u MB allocated\n",
- pages_new, pages_old,
- (unsigned)(hpi->hugepage_sz / 0x100000));
- goto fail;
-#else
RTE_LOG(DEBUG, EAL,
"%d not %d hugepages of size %u MB allocated\n",
pages_new, pages_old,
hpi->num_pages[0] = pages_new;
if (pages_new == 0)
continue;
-#endif
}
- /* 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 (phys_addrs_available) {
+ /* find physical addresses 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 int)(hpi->hugepage_sz / 0x100000));
+ goto fail;
+ }
+ } else {
+ /* set physical addresses for each hugepage */
+ if (set_physaddrs(&tmp_hp[hp_offset], hpi) < 0) {
+ RTE_LOG(DEBUG, EAL, "Failed to set phys addr "
+ "for %u MB pages\n",
+ (unsigned int)(hpi->hugepage_sz / 0x100000));
+ goto fail;
+ }
}
if (find_numasocket(&tmp_hp[hp_offset], hpi) < 0){
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) !=
hpi->num_pages[0]) {
/* we have processed a num of hugepages of this size, so inc offset */
hp_offset += hpi->num_pages[0];
-#endif
}
huge_recover_sigbus();
if (internal_config.memory == 0 && internal_config.force_sockets == 0)
internal_config.memory = eal_get_hugepage_mem_size();
-#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 (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
}
}
}
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;
- }
-
+ /* first memseg index shall be 0 after incrementing it below */
+ j = -1;
for (i = 0; i < nr_hugefiles; i++) {
new_memseg = 0;
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;
}
struct hugepage_file *hp = NULL;
unsigned num_hp = 0;
unsigned i, s = 0; /* s used to track the segment number */
- off_t size;
+ unsigned max_seg = RTE_MAX_MEMSEG;
+ off_t size = 0;
int fd, fd_zero = -1, fd_hugepage = -1;
if (aslr_enabled() > 0) {
"into secondary processes\n");
}
- test_proc_pagemap_readable();
+ test_phys_addrs_available();
if (internal_config.xen_dom0_support) {
#ifdef RTE_LIBRTE_XEN_DOM0
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.
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));
+ max_seg = s;
+ if (base_addr != MAP_FAILED) {
+ /* errno is stale, don't use */
+ RTE_LOG(ERR, EAL, "Could not mmap %llu bytes "
+ "in /dev/zero at [%p], got [%p] - "
+ "please use '--base-virtaddr' option\n",
+ (unsigned long long)mcfg->memseg[s].len,
+ mcfg->memseg[s].addr, base_addr);
+ munmap(base_addr, mcfg->memseg[s].len);
+ } else {
+ RTE_LOG(ERR, EAL, "Could not mmap %llu bytes "
+ "in /dev/zero at [%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 "
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
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);
return 0;
error:
- s = 0;
- while (s < RTE_MAX_MEMSEG && mcfg->memseg[s].len > 0) {
- munmap(mcfg->memseg[s].addr, mcfg->memseg[s].len);
- s++;
- }
+ for (i = 0; i < max_seg && mcfg->memseg[i].len > 0; i++)
+ munmap(mcfg->memseg[i].addr, mcfg->memseg[i].len);
if (hp != NULL && hp != MAP_FAILED)
munmap(hp, size);
if (fd_zero >= 0)
close(fd_hugepage);
return -1;
}
+
+bool
+rte_eal_using_phys_addrs(void)
+{
+ return phys_addrs_available;
+}
git.droids-corp.org / dpdk.git / blobdiff