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session: add support for memfd segments
[vpp.git]
/
src
/
vppinfra
/
linux
/
mem.c
diff --git
a/src/vppinfra/linux/mem.c
b/src/vppinfra/linux/mem.c
index
df46763
..
350ccf8
100644
(file)
--- a/
src/vppinfra/linux/mem.c
+++ b/
src/vppinfra/linux/mem.c
@@
-26,6
+26,7
@@
#include <vppinfra/clib.h>
#include <vppinfra/mem.h>
#include <vppinfra/clib.h>
#include <vppinfra/mem.h>
+#include <vppinfra/time.h>
#include <vppinfra/format.h>
#include <vppinfra/clib_error.h>
#include <vppinfra/linux/syscall.h>
#include <vppinfra/format.h>
#include <vppinfra/clib_error.h>
#include <vppinfra/linux/syscall.h>
@@
-45,13
+46,34
@@
#define F_SEAL_WRITE 0x0008 /* prevent writes */
#endif
#define F_SEAL_WRITE 0x0008 /* prevent writes */
#endif
-int
-clib_mem_vm_get_
log2_
page_size (int fd)
+uword
+clib_mem_vm_get_page_size (int fd)
{
struct stat st = { 0 };
if (fstat (fd, &st) == -1)
return 0;
{
struct stat st = { 0 };
if (fstat (fd, &st) == -1)
return 0;
- return min_log2 (st.st_blksize);
+ return st.st_blksize;
+}
+
+int
+clib_mem_vm_get_log2_page_size (int fd)
+{
+ return min_log2 (clib_mem_vm_get_page_size (fd));
+}
+
+void
+clib_mem_vm_randomize_va (uword * requested_va, u32 log2_page_size)
+{
+ u8 bit_mask = 15;
+
+ if (log2_page_size <= 12)
+ bit_mask = 15;
+ else if (log2_page_size > 12 && log2_page_size <= 16)
+ bit_mask = 3;
+ else
+ bit_mask = 0;
+
+ *requested_va += (clib_cpu_time_now () & bit_mask) * (1 << log2_page_size);
}
clib_error_t *
}
clib_error_t *
@@
-71,12
+93,12
@@
clib_mem_vm_ext_alloc (clib_mem_vm_alloc_t * a)
if (a->flags & (CLIB_MEM_VM_F_NUMA_PREFER | CLIB_MEM_VM_F_NUMA_FORCE))
{
int rv;
if (a->flags & (CLIB_MEM_VM_F_NUMA_PREFER | CLIB_MEM_VM_F_NUMA_FORCE))
{
int rv;
- rv =
-
get_mempolicy (&old_mpol, old_mask, sizeof (old_mask) * 8 + 1,
0, 0);
+ rv =
get_mempolicy (&old_mpol, old_mask, sizeof (old_mask) * 8 + 1,
+
0, 0);
if (rv == -1)
{
if (rv == -1)
{
- if ((a->flags & CLIB_MEM_VM_F_NUMA_FORCE) != 0)
+ if (
a->numa_node != 0 &&
(a->flags & CLIB_MEM_VM_F_NUMA_FORCE) != 0)
{
err = clib_error_return_unix (0, "get_mempolicy");
goto error;
{
err = clib_error_return_unix (0, "get_mempolicy");
goto error;
@@
-131,7
+153,19
@@
clib_mem_vm_ext_alloc (clib_mem_vm_alloc_t * a)
goto error;
}
}
goto error;
}
}
+
log2_page_size = clib_mem_vm_get_log2_page_size (fd);
log2_page_size = clib_mem_vm_get_log2_page_size (fd);
+ if (log2_page_size == 0)
+ {
+ err = clib_error_return_unix (0, "cannot determine page size");
+ goto error;
+ }
+
+ if (a->requested_va)
+ {
+ clib_mem_vm_randomize_va (&a->requested_va, log2_page_size);
+ mmap_flags |= MAP_FIXED;
+ }
}
else /* not CLIB_MEM_VM_F_SHARED */
{
}
else /* not CLIB_MEM_VM_F_SHARED */
{
@@
-149,7
+183,6
@@
clib_mem_vm_ext_alloc (clib_mem_vm_alloc_t * a)
n_pages = ((a->size - 1) >> log2_page_size) + 1;
n_pages = ((a->size - 1) >> log2_page_size) + 1;
-
if (a->flags & CLIB_MEM_VM_F_HUGETLB_PREALLOC)
{
err = clib_sysfs_prealloc_hugepages (a->numa_node,
if (a->flags & CLIB_MEM_VM_F_HUGETLB_PREALLOC)
{
err = clib_sysfs_prealloc_hugepages (a->numa_node,
@@
-180,14
+213,15
@@
clib_mem_vm_ext_alloc (clib_mem_vm_alloc_t * a)
}
}
}
}
- addr = mmap (0, a->size, (PROT_READ | PROT_WRITE), mmap_flags, fd, 0);
+ addr = mmap (uword_to_pointer (a->requested_va, void *), a->size,
+ (PROT_READ | PROT_WRITE), mmap_flags, fd, 0);
if (addr == MAP_FAILED)
{
err = clib_error_return_unix (0, "mmap");
goto error;
}
if (addr == MAP_FAILED)
{
err = clib_error_return_unix (0, "mmap");
goto error;
}
- /* re-apply ol
e
numa memory policy */
+ /* re-apply ol
d
numa memory policy */
if (old_mpol != -1 &&
set_mempolicy (old_mpol, old_mask, sizeof (old_mask) * 8 + 1) == -1)
{
if (old_mpol != -1 &&
set_mempolicy (old_mpol, old_mask, sizeof (old_mask) * 8 + 1) == -1)
{
@@
-249,7
+283,24
@@
done:
return r;
}
return r;
}
+clib_error_t *
+clib_mem_vm_ext_map (clib_mem_vm_map_t * a)
+{
+ int mmap_flags = MAP_SHARED;
+ void *addr;
+
+ if (a->requested_va)
+ mmap_flags |= MAP_FIXED;
+ addr = (void *) mmap (uword_to_pointer (a->requested_va, void *), a->size,
+ PROT_READ | PROT_WRITE, mmap_flags, a->fd, 0);
+
+ if (addr == MAP_FAILED)
+ return clib_error_return_unix (0, "mmap");
+
+ a->addr = addr;
+ return 0;
+}
/*
* fd.io coding-style-patch-verification: ON
/*
* fd.io coding-style-patch-verification: ON