提交 56b24d1b 编写于 作者: L Linus Torvalds

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 fixes from Martin Schwidefsky:

 - four patches to get the new cputime code in shape for s390

 - add the new statx system call

 - a few bug fixes

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390: wire up statx system call
  KVM: s390: Fix guest migration for huge guests resulting in panic
  s390/ipl: always use load normal for CCW-type re-IPL
  s390/timex: micro optimization for tod_to_ns
  s390/cputime: provide archicture specific cputime_to_nsecs
  s390/cputime: reset all accounting fields on fork
  s390/cputime: remove last traces of cputime_t
  s390: fix in-kernel program checks
  s390/crypt: fix missing unlock in ctr_paes_crypt on error path
......@@ -474,8 +474,11 @@ static int ctr_paes_crypt(struct blkcipher_desc *desc, unsigned long modifier,
ret = blkcipher_walk_done(desc, walk, nbytes - n);
}
if (k < n) {
if (__ctr_paes_set_key(ctx) != 0)
if (__ctr_paes_set_key(ctx) != 0) {
if (locked)
spin_unlock(&ctrblk_lock);
return blkcipher_walk_done(desc, walk, -EIO);
}
}
}
if (locked)
......
......@@ -8,31 +8,27 @@
#define _S390_CPUTIME_H
#include <linux/types.h>
#include <asm/div64.h>
#include <asm/timex.h>
#define CPUTIME_PER_USEC 4096ULL
#define CPUTIME_PER_SEC (CPUTIME_PER_USEC * USEC_PER_SEC)
/* We want to use full resolution of the CPU timer: 2**-12 micro-seconds. */
typedef unsigned long long __nocast cputime_t;
typedef unsigned long long __nocast cputime64_t;
#define cmpxchg_cputime(ptr, old, new) cmpxchg64(ptr, old, new)
static inline unsigned long __div(unsigned long long n, unsigned long base)
{
return n / base;
}
/*
* Convert cputime to microseconds and back.
* Convert cputime to microseconds.
*/
static inline unsigned int cputime_to_usecs(const cputime_t cputime)
static inline u64 cputime_to_usecs(const u64 cputime)
{
return (__force unsigned long long) cputime >> 12;
return cputime >> 12;
}
/*
* Convert cputime to nanoseconds.
*/
#define cputime_to_nsecs(cputime) tod_to_ns(cputime)
u64 arch_cpu_idle_time(int cpu);
......
......@@ -206,20 +206,16 @@ static inline unsigned long long get_tod_clock_monotonic(void)
* ns = (todval * 125) >> 9;
*
* In order to avoid an overflow with the multiplication we can rewrite this.
* With a split todval == 2^32 * th + tl (th upper 32 bits, tl lower 32 bits)
* With a split todval == 2^9 * th + tl (th upper 55 bits, tl lower 9 bits)
* we end up with
*
* ns = ((2^32 * th + tl) * 125 ) >> 9;
* -> ns = (2^23 * th * 125) + ((tl * 125) >> 9);
* ns = ((2^9 * th + tl) * 125 ) >> 9;
* -> ns = (th * 125) + ((tl * 125) >> 9);
*
*/
static inline unsigned long long tod_to_ns(unsigned long long todval)
{
unsigned long long ns;
ns = ((todval >> 32) << 23) * 125;
ns += ((todval & 0xffffffff) * 125) >> 9;
return ns;
return ((todval >> 9) * 125) + (((todval & 0x1ff) * 125) >> 9);
}
#endif
......@@ -313,7 +313,9 @@
#define __NR_copy_file_range 375
#define __NR_preadv2 376
#define __NR_pwritev2 377
#define NR_syscalls 378
/* Number 378 is reserved for guarded storage */
#define __NR_statx 379
#define NR_syscalls 380
/*
* There are some system calls that are not present on 64 bit, some
......
......@@ -178,3 +178,4 @@ COMPAT_SYSCALL_WRAP3(getpeername, int, fd, struct sockaddr __user *, usockaddr,
COMPAT_SYSCALL_WRAP6(sendto, int, fd, void __user *, buff, size_t, len, unsigned int, flags, struct sockaddr __user *, addr, int, addr_len);
COMPAT_SYSCALL_WRAP3(mlock2, unsigned long, start, size_t, len, int, flags);
COMPAT_SYSCALL_WRAP6(copy_file_range, int, fd_in, loff_t __user *, off_in, int, fd_out, loff_t __user *, off_out, size_t, len, unsigned int, flags);
COMPAT_SYSCALL_WRAP5(statx, int, dfd, const char __user *, path, unsigned, flags, unsigned, mask, struct statx __user *, buffer);
......@@ -490,7 +490,7 @@ ENTRY(pgm_check_handler)
jnz .Lpgm_svcper # -> single stepped svc
1: CHECK_STACK STACK_SIZE,__LC_SAVE_AREA_SYNC
aghi %r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
j 3f
j 4f
2: UPDATE_VTIME %r14,%r15,__LC_SYNC_ENTER_TIMER
lg %r15,__LC_KERNEL_STACK
lgr %r14,%r12
......@@ -499,8 +499,8 @@ ENTRY(pgm_check_handler)
tm __LC_PGM_ILC+2,0x02 # check for transaction abort
jz 3f
mvc __THREAD_trap_tdb(256,%r14),0(%r13)
3: la %r11,STACK_FRAME_OVERHEAD(%r15)
stg %r10,__THREAD_last_break(%r14)
3: stg %r10,__THREAD_last_break(%r14)
4: la %r11,STACK_FRAME_OVERHEAD(%r15)
stmg %r0,%r7,__PT_R0(%r11)
mvc __PT_R8(64,%r11),__LC_SAVE_AREA_SYNC
stmg %r8,%r9,__PT_PSW(%r11)
......@@ -509,14 +509,14 @@ ENTRY(pgm_check_handler)
xc __PT_FLAGS(8,%r11),__PT_FLAGS(%r11)
stg %r10,__PT_ARGS(%r11)
tm __LC_PGM_ILC+3,0x80 # check for per exception
jz 4f
jz 5f
tmhh %r8,0x0001 # kernel per event ?
jz .Lpgm_kprobe
oi __PT_FLAGS+7(%r11),_PIF_PER_TRAP
mvc __THREAD_per_address(8,%r14),__LC_PER_ADDRESS
mvc __THREAD_per_cause(2,%r14),__LC_PER_CODE
mvc __THREAD_per_paid(1,%r14),__LC_PER_ACCESS_ID
4: REENABLE_IRQS
5: REENABLE_IRQS
xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
larl %r1,pgm_check_table
llgh %r10,__PT_INT_CODE+2(%r11)
......
......@@ -564,6 +564,8 @@ static struct kset *ipl_kset;
static void __ipl_run(void *unused)
{
if (MACHINE_IS_LPAR && ipl_info.type == IPL_TYPE_CCW)
diag308(DIAG308_LOAD_NORMAL_DUMP, NULL);
diag308(DIAG308_LOAD_CLEAR, NULL);
if (MACHINE_IS_VM)
__cpcmd("IPL", NULL, 0, NULL);
......
......@@ -124,7 +124,10 @@ int copy_thread_tls(unsigned long clone_flags, unsigned long new_stackp,
clear_tsk_thread_flag(p, TIF_SINGLE_STEP);
/* Initialize per thread user and system timer values */
p->thread.user_timer = 0;
p->thread.guest_timer = 0;
p->thread.system_timer = 0;
p->thread.hardirq_timer = 0;
p->thread.softirq_timer = 0;
frame->sf.back_chain = 0;
/* new return point is ret_from_fork */
......
......@@ -386,3 +386,5 @@ SYSCALL(sys_mlock2,compat_sys_mlock2)
SYSCALL(sys_copy_file_range,compat_sys_copy_file_range) /* 375 */
SYSCALL(sys_preadv2,compat_sys_preadv2)
SYSCALL(sys_pwritev2,compat_sys_pwritev2)
NI_SYSCALL
SYSCALL(sys_statx,compat_sys_statx)
......@@ -111,7 +111,7 @@ static inline u64 scale_vtime(u64 vtime)
}
static void account_system_index_scaled(struct task_struct *p,
cputime_t cputime, cputime_t scaled,
u64 cputime, u64 scaled,
enum cpu_usage_stat index)
{
p->stimescaled += cputime_to_nsecs(scaled);
......
......@@ -608,12 +608,29 @@ void ptep_zap_key(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
bool test_and_clear_guest_dirty(struct mm_struct *mm, unsigned long addr)
{
spinlock_t *ptl;
pgd_t *pgd;
pud_t *pud;
pmd_t *pmd;
pgste_t pgste;
pte_t *ptep;
pte_t pte;
bool dirty;
ptep = get_locked_pte(mm, addr, &ptl);
pgd = pgd_offset(mm, addr);
pud = pud_alloc(mm, pgd, addr);
if (!pud)
return false;
pmd = pmd_alloc(mm, pud, addr);
if (!pmd)
return false;
/* We can't run guests backed by huge pages, but userspace can
* still set them up and then try to migrate them without any
* migration support.
*/
if (pmd_large(*pmd))
return true;
ptep = pte_alloc_map_lock(mm, pmd, addr, &ptl);
if (unlikely(!ptep))
return false;
......
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