X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvppinfra%2Fpmalloc.c;h=41309dd1d99e9f93130a2d850a28654e323e83c6;hb=8ebd7929bdfd3ce6e9648abb76b7289056ea5114;hp=5812f9fa120ea63581d14aeef22681b0e39a64d1;hpb=567e61d09cd00174203eff85f63a598420476951;p=vpp.git

diff --git a/src/vppinfra/pmalloc.c b/src/vppinfra/pmalloc.c
index 5812f9fa120..41309dd1d99 100644
--- a/src/vppinfra/pmalloc.c
+++ b/src/vppinfra/pmalloc.c
@@ -62,6 +62,7 @@ int
 clib_pmalloc_init (clib_pmalloc_main_t * pm, uword size)
 {
   uword off, pagesize;
+  u64 *pt = 0;
 
   ASSERT (pm->error == 0);
 
@@ -70,6 +71,11 @@ clib_pmalloc_init (clib_pmalloc_main_t * pm, uword size)
   pm->sys_log2_page_sz = min_log2 (sysconf (_SC_PAGESIZE));
   pm->lookup_log2_page_sz = pm->def_log2_page_sz;
 
+  /* check if pagemap is accessible */
+  pt = clib_mem_vm_get_paddr (&pt, pm->sys_log2_page_sz, 1);
+  if (pt == 0 || pt[0] == 0)
+    pm->flags |= CLIB_PMALLOC_F_NO_PAGEMAP;
+
   size = size ? size : ((u64) DEFAULT_RESERVED_MB) << 20;
   size = round_pow2 (size, pagesize);
 
@@ -95,7 +101,7 @@ clib_pmalloc_init (clib_pmalloc_main_t * pm, uword size)
       pm->base += off;
     }
 
-  munmap (pm->base + (pm->max_pages * pagesize), pagesize - off);
+  munmap (pm->base + ((uword) pm->max_pages * pagesize), pagesize - off);
   return 0;
 }
 
@@ -206,12 +212,23 @@ pmalloc_update_lookup_table (clib_pmalloc_main_t * pm, u32 first, u32 count)
   vec_validate_aligned (pm->lookup_table, vec_len (pm->pages) *
 			elts_per_page - 1, CLIB_CACHE_LINE_BYTES);
 
-  fd = open ((char *) "/proc/self/pagemap", O_RDONLY);
+  p = (uword) first *elts_per_page;
+  if (pm->flags & CLIB_PMALLOC_F_NO_PAGEMAP)
+    {
+      while (p < (uword) elts_per_page * count)
+	{
+	  pm->lookup_table[p] = pointer_to_uword (pm->base) +
+	    (p << pm->lookup_log2_page_sz);
+	  p++;
+	}
+      return;
+    }
 
-  p = first * elts_per_page;
-  while (p < elts_per_page * count)
+  fd = open ((char *) "/proc/self/pagemap", O_RDONLY);
+  while (p < (uword) elts_per_page * count)
     {
       va = pointer_to_uword (pm->base) + (p << pm->lookup_log2_page_sz);
+      pa = 0;
       seek = (va >> pm->sys_log2_page_sz) * sizeof (pa);
       if (fd != -1 && lseek (fd, seek, SEEK_SET) == seek &&
 	  read (fd, &pa, sizeof (pa)) == (sizeof (pa)) &&
@@ -273,24 +290,29 @@ pmalloc_map_pages (clib_pmalloc_main_t * pm, clib_pmalloc_arena_t * a,
       return 0;
     }
 
-  mmap_flags = MAP_FIXED | MAP_ANONYMOUS | MAP_LOCKED;
+  mmap_flags = MAP_FIXED;
 
-  if (a->log2_subpage_sz != pm->sys_log2_page_sz)
-    mmap_flags |= MAP_HUGETLB;
+  if ((pm->flags & CLIB_PMALLOC_F_NO_PAGEMAP) == 0)
+    mmap_flags |= MAP_LOCKED;
 
   if (a->flags & CLIB_PMALLOC_ARENA_F_SHARED_MEM)
     {
       mmap_flags |= MAP_SHARED;
-      if (mmap_flags & MAP_HUGETLB)
+      if (a->log2_subpage_sz != pm->sys_log2_page_sz)
 	pm->error = clib_mem_create_hugetlb_fd ((char *) a->name, &a->fd);
       else
 	pm->error = clib_mem_create_fd ((char *) a->name, &a->fd);
       if (a->fd == -1)
 	goto error;
+      if ((ftruncate (a->fd, size)) == -1)
+	goto error;
     }
   else
     {
-      mmap_flags |= MAP_PRIVATE;
+      if (a->log2_subpage_sz != pm->sys_log2_page_sz)
+	mmap_flags |= MAP_HUGETLB;
+
+      mmap_flags |= MAP_PRIVATE | MAP_ANONYMOUS;
       a->fd = -1;
     }
 
@@ -406,7 +428,7 @@ clib_pmalloc_create_shared_arena (clib_pmalloc_main_t * pm, char *name,
       return 0;
     }
 
-  return pm->base + (pp->index << pm->def_log2_page_sz);
+  return pm->base + ((uword) pp->index << pm->def_log2_page_sz);
 }
 
 static inline void *
@@ -585,8 +607,6 @@ format_pmalloc_page (u8 * s, va_list * va)
   int verbose = va_arg (*va, int);
   u32 indent = format_get_indent (s);
 
-  s = format (s, "page %u: phys-addr %p ", pp->index, pp->pa);
-
   if (pp->chunks == 0)
     return s;
 
@@ -628,9 +648,10 @@ format_pmalloc (u8 * s, va_list * va)
   clib_pmalloc_arena_t *a;
 
   s = format (s, "used-pages %u reserved-pages %u default-page-size %U "
-	      "lookup-page-size %U", vec_len (pm->pages), pm->max_pages,
+	      "lookup-page-size %U%s", vec_len (pm->pages), pm->max_pages,
 	      format_log2_page_size, pm->def_log2_page_sz,
-	      format_log2_page_size, pm->lookup_log2_page_sz);
+	      format_log2_page_size, pm->lookup_log2_page_sz,
+	      pm->flags & CLIB_PMALLOC_F_NO_PAGEMAP ? " no-pagemap" : "");
 
 
   if (verbose >= 2)
@@ -664,6 +685,29 @@ format_pmalloc (u8 * s, va_list * va)
   return s;
 }
 
+u8 *
+format_pmalloc_map (u8 * s, va_list * va)
+{
+  clib_pmalloc_main_t *pm = va_arg (*va, clib_pmalloc_main_t *);
+
+  u32 index;
+  s = format (s, "%16s %13s %8s", "virtual-addr", "physical-addr", "size");
+  vec_foreach_index (index, pm->lookup_table)
+  {
+    uword *lookup_val, pa, va;
+    lookup_val = vec_elt_at_index (pm->lookup_table, index);
+    va =
+      pointer_to_uword (pm->base) +
+      ((uword) index << pm->lookup_log2_page_sz);
+    pa = va - *lookup_val;
+    s =
+      format (s, "\n %16p %13p %8U", uword_to_pointer (va, u64),
+	      uword_to_pointer (pa, u64), format_log2_page_size,
+	      pm->lookup_log2_page_sz);
+  }
+  return s;
+}
+
 /*
  * fd.io coding-style-patch-verification: ON
  *