/* compatibility flags */
#define MAP_FILE 0
+/*
+ * When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size.
+ * This gives us 6 bits, which is enough until someone invents 128 bit address
+ * spaces.
+ *
+ * Assume these are all power of twos.
+ * When 0 use the default page size.
+ */
+#define MAP_HUGE_SHIFT 26
+#define MAP_HUGE_MASK 0x3f
+
#endif /* __ALPHA_MMAN_H__ */
/* compatibility flags */
#define MAP_FILE 0
+/*
+ * When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size.
+ * This gives us 6 bits, which is enough until someone invents 128 bit address
+ * spaces.
+ *
+ * Assume these are all power of twos.
+ * When 0 use the default page size.
+ */
+#define MAP_HUGE_SHIFT 26
+#define MAP_HUGE_MASK 0x3f
+
#endif /* _ASM_MMAN_H */
#define MAP_FILE 0
#define MAP_VARIABLE 0
+/*
+ * When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size.
+ * This gives us 6 bits, which is enough until someone invents 128 bit address
+ * spaces.
+ *
+ * Assume these are all power of twos.
+ * When 0 use the default page size.
+ */
+#define MAP_HUGE_SHIFT 26
+#define MAP_HUGE_MASK 0x3f
+
#endif /* __PARISC_MMAN_H__ */
#define MAP_32BIT 0x40 /* only give out 32bit addresses */
+#define MAP_HUGE_2MB (21 << MAP_HUGE_SHIFT)
+#define MAP_HUGE_1GB (30 << MAP_HUGE_SHIFT)
+
#include <asm-generic/mman.h>
#endif /* _ASM_X86_MMAN_H */
/* compatibility flags */
#define MAP_FILE 0
+/*
+ * When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size.
+ * This gives us 6 bits, which is enough until someone invents 128 bit address
+ * spaces.
+ *
+ * Assume these are all power of twos.
+ * When 0 use the default page size.
+ */
+#define MAP_HUGE_SHIFT 26
+#define MAP_HUGE_MASK 0x3f
+
#endif /* _XTENSA_MMAN_H */
.kill_sb = kill_litter_super,
};
-static struct vfsmount *hugetlbfs_vfsmount;
+static struct vfsmount *hugetlbfs_vfsmount[HUGE_MAX_HSTATE];
static int can_do_hugetlb_shm(void)
{
return capable(CAP_IPC_LOCK) || in_group_p(shm_group);
}
+static int get_hstate_idx(int page_size_log)
+{
+ struct hstate *h;
+
+ if (!page_size_log)
+ return default_hstate_idx;
+ h = size_to_hstate(1 << page_size_log);
+ if (!h)
+ return -1;
+ return h - hstates;
+}
+
struct file *hugetlb_file_setup(const char *name, unsigned long addr,
size_t size, vm_flags_t acctflag,
- struct user_struct **user, int creat_flags)
+ struct user_struct **user,
+ int creat_flags, int page_size_log)
{
int error = -ENOMEM;
struct file *file;
struct qstr quick_string;
struct hstate *hstate;
unsigned long num_pages;
+ int hstate_idx;
+
+ hstate_idx = get_hstate_idx(page_size_log);
+ if (hstate_idx < 0)
+ return ERR_PTR(-ENODEV);
*user = NULL;
- if (!hugetlbfs_vfsmount)
+ if (!hugetlbfs_vfsmount[hstate_idx])
return ERR_PTR(-ENOENT);
if (creat_flags == HUGETLB_SHMFS_INODE && !can_do_hugetlb_shm()) {
}
}
- root = hugetlbfs_vfsmount->mnt_root;
+ root = hugetlbfs_vfsmount[hstate_idx]->mnt_root;
quick_string.name = name;
quick_string.len = strlen(quick_string.name);
quick_string.hash = 0;
if (!path.dentry)
goto out_shm_unlock;
- path.mnt = mntget(hugetlbfs_vfsmount);
+ path.mnt = mntget(hugetlbfs_vfsmount[hstate_idx]);
error = -ENOSPC;
inode = hugetlbfs_get_inode(root->d_sb, NULL, S_IFREG | S_IRWXUGO, 0);
if (!inode)
static int __init init_hugetlbfs_fs(void)
{
+ struct hstate *h;
int error;
- struct vfsmount *vfsmount;
+ int i;
error = bdi_init(&hugetlbfs_backing_dev_info);
if (error)
if (error)
goto out;
- vfsmount = kern_mount(&hugetlbfs_fs_type);
+ i = 0;
+ for_each_hstate(h) {
+ char buf[50];
+ unsigned ps_kb = 1U << (h->order + PAGE_SHIFT - 10);
- if (!IS_ERR(vfsmount)) {
- hugetlbfs_vfsmount = vfsmount;
- return 0;
- }
+ snprintf(buf, sizeof(buf), "pagesize=%uK", ps_kb);
+ hugetlbfs_vfsmount[i] = kern_mount_data(&hugetlbfs_fs_type,
+ buf);
- error = PTR_ERR(vfsmount);
+ if (IS_ERR(hugetlbfs_vfsmount[i])) {
+ pr_err("hugetlb: Cannot mount internal hugetlbfs for "
+ "page size %uK", ps_kb);
+ error = PTR_ERR(hugetlbfs_vfsmount[i]);
+ hugetlbfs_vfsmount[i] = NULL;
+ }
+ i++;
+ }
+ /* Non default hstates are optional */
+ if (!IS_ERR_OR_NULL(hugetlbfs_vfsmount[default_hstate_idx]))
+ return 0;
out:
kmem_cache_destroy(hugetlbfs_inode_cachep);
static void __exit exit_hugetlbfs_fs(void)
{
+ struct hstate *h;
+ int i;
+
+
/*
* Make sure all delayed rcu free inodes are flushed before we
* destroy cache.
*/
rcu_barrier();
kmem_cache_destroy(hugetlbfs_inode_cachep);
- kern_unmount(hugetlbfs_vfsmount);
+ i = 0;
+ for_each_hstate(h)
+ kern_unmount(hugetlbfs_vfsmount[i++]);
unregister_filesystem(&hugetlbfs_fs_type);
bdi_destroy(&hugetlbfs_backing_dev_info);
}
extern const struct vm_operations_struct hugetlb_vm_ops;
struct file *hugetlb_file_setup(const char *name, unsigned long addr,
size_t size, vm_flags_t acct,
- struct user_struct **user, int creat_flags);
+ struct user_struct **user, int creat_flags,
+ int page_size_log);
static inline int is_file_hugepages(struct file *file)
{
return 0;
}
+
#else /* !CONFIG_HUGETLBFS */
#define is_file_hugepages(file) 0
static inline struct file *
hugetlb_file_setup(const char *name, unsigned long addr, size_t size,
- vm_flags_t acctflag, struct user_struct **user, int creat_flags)
+ vm_flags_t acctflag, struct user_struct **user, int creat_flags,
+ int page_size_log)
{
return ERR_PTR(-ENOSYS);
}
#define SHM_HUGETLB 04000 /* segment will use huge TLB pages */
#define SHM_NORESERVE 010000 /* don't check for reservations */
+/* Bits [26:31] are reserved */
+
+/*
+ * When SHM_HUGETLB is set bits [26:31] encode the log2 of the huge page size.
+ * This gives us 6 bits, which is enough until someone invents 128 bit address
+ * spaces.
+ *
+ * Assume these are all power of twos.
+ * When 0 use the default page size.
+ */
+#define SHM_HUGE_SHIFT 26
+#define SHM_HUGE_MASK 0x3f
+#define SHM_HUGE_2MB (21 << SHM_HUGE_SHIFT)
+#define SHM_HUGE_1GB (30 << SHM_HUGE_SHIFT)
+
#ifdef CONFIG_SYSVIPC
long do_shmat(int shmid, char __user *shmaddr, int shmflg, unsigned long *addr,
unsigned long shmlba);
/* compatibility flags */
#define MAP_FILE 0
+/*
+ * When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size.
+ * This gives us 6 bits, which is enough until someone invents 128 bit address
+ * spaces.
+ *
+ * Assume these are all power of twos.
+ * When 0 use the default page size.
+ */
+#define MAP_HUGE_SHIFT 26
+#define MAP_HUGE_MASK 0x3f
+
#endif /* __ASM_GENERIC_MMAN_COMMON_H */
#define MAP_STACK 0x20000 /* give out an address that is best suited for process/thread stacks */
#define MAP_HUGETLB 0x40000 /* create a huge page mapping */
+/* Bits [26:31] are reserved, see mman-common.h for MAP_HUGETLB usage */
+
#define MCL_CURRENT 1 /* lock all current mappings */
#define MCL_FUTURE 2 /* lock all future mappings */
if (shmflg & SHM_NORESERVE)
acctflag = VM_NORESERVE;
file = hugetlb_file_setup(name, 0, size, acctflag,
- &shp->mlock_user, HUGETLB_SHMFS_INODE);
+ &shp->mlock_user, HUGETLB_SHMFS_INODE,
+ (shmflg >> SHM_HUGE_SHIFT) & SHM_HUGE_MASK);
} else {
/*
* Do not allow no accounting for OVERCOMMIT_NEVER, even
* memory so no accounting is necessary
*/
file = hugetlb_file_setup(HUGETLB_ANON_FILE, addr, len,
- VM_NORESERVE, &user,
- HUGETLB_ANONHUGE_INODE);
+ VM_NORESERVE,
+ &user, HUGETLB_ANONHUGE_INODE,
+ (flags >> MAP_HUGE_SHIFT) & MAP_HUGE_MASK);
if (IS_ERR(file))
return PTR_ERR(file);
}
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff