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futex adaptation from Linux 2.6.34 (Intel MPSS Linux)

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This commit is contained in:
Balazs Gerofi bgerofi@riken.jp
2013-05-10 14:23:14 +09:00
parent a79bfd6a01
commit 83db56a040
10 changed files with 1341 additions and 406 deletions
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80
kernel/include/futex.h
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@ -1,24 +1,50 @@
/* Kitten LWK futex adaptation */
/*
* Linux futex adaptation.
* (C) Copyright 2013 RIKEN AICS
* Balazs Gerofi <bgerofi@riken.jp>
*/
#ifndef _LWK_FUTEX_H
#define _LWK_FUTEX_H
#ifndef _FUTEX_H
#define _FUTEX_H
/** \name Futex Commands
* @{
*/
#define FUTEX_WAIT 0
#define FUTEX_WAKE 1
#define FUTEX_FD 2
#define FUTEX_REQUEUE 3
#define FUTEX_CMP_REQUEUE 4
#define FUTEX_WAKE_OP 5
#define FUTEX_LOCK_PI 6
#define FUTEX_UNLOCK_PI 7
#define FUTEX_TRYLOCK_PI 8
#define FUTEX_WAIT_BITSET 9
#define FUTEX_WAKE_BITSET 10
#define FUTEX_WAIT_REQUEUE_PI 11
#define FUTEX_CMP_REQUEUE_PI 12
// @}
#define FUTEX_PRIVATE_FLAG 128
#define FUTEX_CLOCK_REALTIME 256
#define FUTEX_CMD_MASK ~(FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME)
#define FUTEX_WAIT_PRIVATE (FUTEX_WAIT | FUTEX_PRIVATE_FLAG)
#define FUTEX_WAKE_PRIVATE (FUTEX_WAKE | FUTEX_PRIVATE_FLAG)
#define FUTEX_REQUEUE_PRIVATE (FUTEX_REQUEUE | FUTEX_PRIVATE_FLAG)
#define FUTEX_CMP_REQUEUE_PRIVATE (FUTEX_CMP_REQUEUE | FUTEX_PRIVATE_FLAG)
#define FUTEX_WAKE_OP_PRIVATE (FUTEX_WAKE_OP | FUTEX_PRIVATE_FLAG)
#define FUTEX_LOCK_PI_PRIVATE (FUTEX_LOCK_PI | FUTEX_PRIVATE_FLAG)
#define FUTEX_UNLOCK_PI_PRIVATE (FUTEX_UNLOCK_PI | FUTEX_PRIVATE_FLAG)
#define FUTEX_TRYLOCK_PI_PRIVATE (FUTEX_TRYLOCK_PI | FUTEX_PRIVATE_FLAG)
#define FUTEX_WAIT_BITSET_PRIVATE (FUTEX_WAIT_BITSET | FUTEX_PRIVATE_FLAG)
#define FUTEX_WAKE_BITSET_PRIVATE (FUTEX_WAKE_BITSET | FUTEX_PRIVATE_FLAG)
#define FUTEX_WAIT_REQUEUE_PI_PRIVATE (FUTEX_WAIT_REQUEUE_PI | \
FUTEX_PRIVATE_FLAG)
#define FUTEX_CMP_REQUEUE_PI_PRIVATE (FUTEX_CMP_REQUEUE_PI | \
FUTEX_PRIVATE_FLAG)
/** \name Futex Operations, used for FUTEX_WAKE_OP
* @{
*/
@ -201,30 +227,34 @@ static inline int futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval,
#define FUTEX_HASHBITS 8 /* 256 entries in each futex hash tbl */
/** Futex tracking structure.
*
* A futex has a woken state, just like tasks have TASK_RUNNING.
* It is considered woken when list_empty(&futex->link) || futex->lock_ptr == 0.
* The order of wakup is always to make the first condition true, then
* wake up futex->waitq, then make the second condition true.
*/
struct futex {
struct list_head link;
struct waitq waitq;
ihk_spinlock_t * lock_ptr;
uint32_t __user * uaddr;
uint32_t bitset;
#define FUT_OFF_INODE 1 /* We set bit 0 if key has a reference on inode */
#define FUT_OFF_MMSHARED 2 /* We set bit 1 if key has a reference on mm */
struct process_vm;
union futex_key {
#if 0
struct {
unsigned long pgoff;
struct inode *inode;
int offset;
} shared;
#endif
struct {
unsigned long address;
struct process_vm *mm;
int offset;
} private;
struct {
unsigned long word;
void *ptr;
int offset;
} both;
};
struct futex_queue {
ihk_spinlock_t lock;
struct list_head futex_list;
};
#define FUTEX_KEY_INIT (union futex_key) { .both = { .ptr = NULL } }
extern void
futex_queue_init(
struct futex_queue * queue
);
extern int futex_init(void);
extern int
futex(