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authorAlexey Kardashevskiy <aik@ozlabs.ru>2017-03-02 13:36:11 +1100
committerDavid Gibson <david@gibson.dropbear.id.au>2017-03-03 11:30:59 +1100
commit9c60766887c647df7193463f7a2075e8993b514c (patch)
tree8c6c4797388c2b03226e7e5871531646234d0f1f /util/mmap-alloc.c
parent9b44c836dc37507513eb67cea862f82dafa249d8 (diff)
exec, kvm, target-ppc: Move getrampagesize() to common code
getrampagesize() returns the largest supported page size and mainly used to know if huge pages are enabled. However is implemented in target-ppc/kvm.c and not available in TCG or other architectures. This renames and moves gethugepagesize() to mmap-alloc.c where fd-based analog of it is already implemented. This renames and moves getrampagesize() to exec.c as it seems to be the common place for helpers like this. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'util/mmap-alloc.c')
-rw-r--r--util/mmap-alloc.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/util/mmap-alloc.c b/util/mmap-alloc.c
index 2f55f5e94f..3ec029a9ea 100644
--- a/util/mmap-alloc.c
+++ b/util/mmap-alloc.c
@@ -40,6 +40,31 @@ size_t qemu_fd_getpagesize(int fd)
return getpagesize();
}
+size_t qemu_mempath_getpagesize(const char *mem_path)
+{
+#ifdef CONFIG_LINUX
+ struct statfs fs;
+ int ret;
+
+ do {
+ ret = statfs(mem_path, &fs);
+ } while (ret != 0 && errno == EINTR);
+
+ if (ret != 0) {
+ fprintf(stderr, "Couldn't statfs() memory path: %s\n",
+ strerror(errno));
+ exit(1);
+ }
+
+ if (fs.f_type == HUGETLBFS_MAGIC) {
+ /* It's hugepage, return the huge page size */
+ return fs.f_bsize;
+ }
+#endif
+
+ return getpagesize();
+}
+
void *qemu_ram_mmap(int fd, size_t size, size_t align, bool shared)
{
/*