diff options
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/bitops.h | 36 | ||||
| -rw-r--r-- | arch/s390/kernel/head.S | 2 |
2 files changed, 37 insertions, 1 deletions
diff --git a/arch/s390/include/asm/bitops.h b/arch/s390/include/asm/bitops.h index 6038349c8410..16df62dde094 100644 --- a/arch/s390/include/asm/bitops.h +++ b/arch/s390/include/asm/bitops.h @@ -151,6 +151,18 @@ static inline void set_bit(unsigned long nr, volatile unsigned long *ptr) unsigned long *addr = __bitops_word(nr, ptr); unsigned long mask; +#ifdef CONFIG_HAVE_MARCH_ZEC12_FEATURES + if (__builtin_constant_p(nr)) { + unsigned char *caddr = __bitops_byte(nr, ptr); + + asm volatile( + "oi %0,%b1\n" + : "+Q" (*caddr) + : "i" (1 << (nr & 7)) + : "cc"); + return; + } +#endif mask = 1UL << (nr & (BITS_PER_LONG - 1)); __BITOPS_LOOP(addr, mask, __BITOPS_OR); } @@ -160,6 +172,18 @@ static inline void clear_bit(unsigned long nr, volatile unsigned long *ptr) unsigned long *addr = __bitops_word(nr, ptr); unsigned long mask; +#ifdef CONFIG_HAVE_MARCH_ZEC12_FEATURES + if (__builtin_constant_p(nr)) { + unsigned char *caddr = __bitops_byte(nr, ptr); + + asm volatile( + "ni %0,%b1\n" + : "+Q" (*caddr) + : "i" (~(1 << (nr & 7))) + : "cc"); + return; + } +#endif mask = ~(1UL << (nr & (BITS_PER_LONG - 1))); __BITOPS_LOOP(addr, mask, __BITOPS_AND); } @@ -169,6 +193,18 @@ static inline void change_bit(unsigned long nr, volatile unsigned long *ptr) unsigned long *addr = __bitops_word(nr, ptr); unsigned long mask; +#ifdef CONFIG_HAVE_MARCH_ZEC12_FEATURES + if (__builtin_constant_p(nr)) { + unsigned char *caddr = __bitops_byte(nr, ptr); + + asm volatile( + "xi %0,%b1\n" + : "+Q" (*caddr) + : "i" (1 << (nr & 7)) + : "cc"); + return; + } +#endif mask = 1UL << (nr & (BITS_PER_LONG - 1)); __BITOPS_LOOP(addr, mask, __BITOPS_XOR); } diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S index fd8db63dfc94..429afcc480cb 100644 --- a/arch/s390/kernel/head.S +++ b/arch/s390/kernel/head.S @@ -437,7 +437,7 @@ ENTRY(startup_kdump) #if defined(CONFIG_64BIT) #if defined(CONFIG_MARCH_ZEC12) - .long 3, 0xc100efe3, 0xf46ce000, 0x00400000 + .long 3, 0xc100efe3, 0xf46ce800, 0x00400000 #elif defined(CONFIG_MARCH_Z196) .long 2, 0xc100efe3, 0xf46c0000 #elif defined(CONFIG_MARCH_Z10) |