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-rw-r--r--lib/librte_eal/linuxapp/eal/eal_memory.c17
1 files changed, 13 insertions, 4 deletions
diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c
index 42a29fa..41e0a92 100644
--- a/lib/librte_eal/linuxapp/eal/eal_memory.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memory.c
@@ -99,6 +99,8 @@
#include "eal_filesystem.h"
#include "eal_hugepages.h"
+#define PFN_MASK_SIZE 8
+
#ifdef RTE_LIBRTE_XEN_DOM0
int rte_xen_dom0_supported(void)
{
@@ -158,7 +160,7 @@ rte_mem_lock_page(const void *virt)
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;
@@ -209,10 +211,17 @@ rte_mem_virt2phy(const void *virtaddr)
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;
}
@@ -222,7 +231,7 @@ rte_mem_virt2phy(const void *virtaddr)
*/
physaddr = ((page & 0x7fffffffffffffULL) * page_size)
+ ((unsigned long)virtaddr % page_size);
- close(fd);
+
return physaddr;
}