2005-04-17 06:20:36 +08:00
|
|
|
config MMU
|
2007-05-10 21:46:00 +08:00
|
|
|
def_bool y
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2007-02-10 17:43:09 +08:00
|
|
|
config ZONE_DMA
|
2011-05-26 15:48:31 +08:00
|
|
|
def_bool y
|
2007-02-10 17:43:09 +08:00
|
|
|
|
2016-04-14 15:00:27 +08:00
|
|
|
config CPU_BIG_ENDIAN
|
|
|
|
|
def_bool y
|
|
|
|
|
|
2006-07-03 15:25:02 +08:00
|
|
|
config LOCKDEP_SUPPORT
|
2007-05-10 21:46:00 +08:00
|
|
|
def_bool y
|
2006-07-03 15:25:02 +08:00
|
|
|
|
2006-07-03 15:24:41 +08:00
|
|
|
config STACKTRACE_SUPPORT
|
2007-05-10 21:46:00 +08:00
|
|
|
def_bool y
|
2006-07-03 15:24:41 +08:00
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
config RWSEM_GENERIC_SPINLOCK
|
|
|
|
|
bool
|
|
|
|
|
|
|
|
|
|
config RWSEM_XCHGADD_ALGORITHM
|
2007-05-10 21:46:00 +08:00
|
|
|
def_bool y
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2006-12-08 18:37:49 +08:00
|
|
|
config ARCH_HAS_ILOG2_U32
|
2011-01-05 19:47:15 +08:00
|
|
|
def_bool n
|
2006-12-08 18:37:49 +08:00
|
|
|
|
|
|
|
|
config ARCH_HAS_ILOG2_U64
|
2011-01-05 19:47:15 +08:00
|
|
|
def_bool n
|
2006-12-08 18:37:49 +08:00
|
|
|
|
2006-03-26 17:39:34 +08:00
|
|
|
config GENERIC_HWEIGHT
|
2007-05-10 21:46:00 +08:00
|
|
|
def_bool y
|
2006-03-26 17:39:34 +08:00
|
|
|
|
2007-04-27 22:01:42 +08:00
|
|
|
config GENERIC_BUG
|
2011-01-05 19:47:15 +08:00
|
|
|
def_bool y if BUG
|
2007-04-27 22:01:42 +08:00
|
|
|
|
2010-02-27 05:37:44 +08:00
|
|
|
config GENERIC_BUG_RELATIVE_POINTERS
|
|
|
|
|
def_bool y
|
|
|
|
|
|
2010-10-25 22:10:50 +08:00
|
|
|
config ARCH_DMA_ADDR_T_64BIT
|
2015-02-12 20:08:27 +08:00
|
|
|
def_bool y
|
2010-10-25 22:10:50 +08:00
|
|
|
|
2008-02-05 23:50:42 +08:00
|
|
|
config GENERIC_LOCKBREAK
|
2011-01-05 19:47:15 +08:00
|
|
|
def_bool y if SMP && PREEMPT
|
2008-02-05 23:50:42 +08:00
|
|
|
|
2008-03-26 01:47:10 +08:00
|
|
|
config PGSTE
|
2011-01-05 19:47:15 +08:00
|
|
|
def_bool y if KVM
|
2008-03-26 01:47:10 +08:00
|
|
|
|
2009-04-01 06:23:17 +08:00
|
|
|
config ARCH_SUPPORTS_DEBUG_PAGEALLOC
|
|
|
|
|
def_bool y
|
|
|
|
|
|
2012-08-27 16:55:18 +08:00
|
|
|
config KEXEC
|
|
|
|
|
def_bool y
|
2015-09-10 06:38:55 +08:00
|
|
|
select KEXEC_CORE
|
2012-08-27 16:55:18 +08:00
|
|
|
|
|
|
|
|
config AUDIT_ARCH
|
|
|
|
|
def_bool y
|
|
|
|
|
|
2014-04-08 06:39:19 +08:00
|
|
|
config NO_IOPORT_MAP
|
2012-11-29 21:38:46 +08:00
|
|
|
def_bool y
|
|
|
|
|
|
|
|
|
|
config PCI_QUIRKS
|
|
|
|
|
def_bool n
|
|
|
|
|
|
2014-09-22 22:39:06 +08:00
|
|
|
config ARCH_SUPPORTS_UPROBES
|
2015-02-12 20:08:27 +08:00
|
|
|
def_bool y
|
2014-09-22 22:39:06 +08:00
|
|
|
|
2006-01-06 16:19:28 +08:00
|
|
|
config S390
|
2007-05-10 21:46:00 +08:00
|
|
|
def_bool y
|
2015-11-20 10:19:29 +08:00
|
|
|
select ARCH_HAS_DEVMEM_IS_ALLOWED
|
2015-04-15 06:48:00 +08:00
|
|
|
select ARCH_HAS_ELF_RANDOMIZE
|
2014-12-13 08:57:44 +08:00
|
|
|
select ARCH_HAS_GCOV_PROFILE_ALL
|
2016-10-08 08:01:46 +08:00
|
|
|
select ARCH_HAS_GIGANTIC_PAGE
|
2016-06-20 20:08:32 +08:00
|
|
|
select ARCH_HAS_KCOV
|
2017-02-21 23:09:33 +08:00
|
|
|
select ARCH_HAS_SET_MEMORY
|
2014-12-22 17:07:04 +08:00
|
|
|
select ARCH_HAS_SG_CHAIN
|
2017-02-07 08:31:57 +08:00
|
|
|
select ARCH_HAS_STRICT_KERNEL_RWX
|
|
|
|
|
select ARCH_HAS_STRICT_MODULE_RWX
|
2016-09-12 20:37:20 +08:00
|
|
|
select ARCH_HAS_UBSAN_SANITIZE_ALL
|
2013-02-06 17:15:55 +08:00
|
|
|
select ARCH_HAVE_NMI_SAFE_CMPXCHG
|
2009-11-09 23:21:34 +08:00
|
|
|
select ARCH_INLINE_READ_LOCK
|
|
|
|
|
select ARCH_INLINE_READ_LOCK_BH
|
|
|
|
|
select ARCH_INLINE_READ_LOCK_IRQ
|
|
|
|
|
select ARCH_INLINE_READ_LOCK_IRQSAVE
|
2013-02-06 17:15:55 +08:00
|
|
|
select ARCH_INLINE_READ_TRYLOCK
|
2009-11-09 23:21:34 +08:00
|
|
|
select ARCH_INLINE_READ_UNLOCK
|
|
|
|
|
select ARCH_INLINE_READ_UNLOCK_BH
|
|
|
|
|
select ARCH_INLINE_READ_UNLOCK_IRQ
|
|
|
|
|
select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
|
2013-02-06 17:15:55 +08:00
|
|
|
select ARCH_INLINE_SPIN_LOCK
|
|
|
|
|
select ARCH_INLINE_SPIN_LOCK_BH
|
|
|
|
|
select ARCH_INLINE_SPIN_LOCK_IRQ
|
|
|
|
|
select ARCH_INLINE_SPIN_LOCK_IRQSAVE
|
|
|
|
|
select ARCH_INLINE_SPIN_TRYLOCK
|
|
|
|
|
select ARCH_INLINE_SPIN_TRYLOCK_BH
|
|
|
|
|
select ARCH_INLINE_SPIN_UNLOCK
|
|
|
|
|
select ARCH_INLINE_SPIN_UNLOCK_BH
|
|
|
|
|
select ARCH_INLINE_SPIN_UNLOCK_IRQ
|
|
|
|
|
select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
|
2009-11-09 23:21:34 +08:00
|
|
|
select ARCH_INLINE_WRITE_LOCK
|
|
|
|
|
select ARCH_INLINE_WRITE_LOCK_BH
|
|
|
|
|
select ARCH_INLINE_WRITE_LOCK_IRQ
|
|
|
|
|
select ARCH_INLINE_WRITE_LOCK_IRQSAVE
|
2013-02-06 17:15:55 +08:00
|
|
|
select ARCH_INLINE_WRITE_TRYLOCK
|
2009-11-09 23:21:34 +08:00
|
|
|
select ARCH_INLINE_WRITE_UNLOCK
|
|
|
|
|
select ARCH_INLINE_WRITE_UNLOCK_BH
|
|
|
|
|
select ARCH_INLINE_WRITE_UNLOCK_IRQ
|
|
|
|
|
select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
|
2013-02-06 17:15:55 +08:00
|
|
|
select ARCH_SAVE_PAGE_KEYS if HIBERNATION
|
2014-08-05 15:57:51 +08:00
|
|
|
select ARCH_SUPPORTS_ATOMIC_RMW
|
2015-05-08 23:40:44 +08:00
|
|
|
select ARCH_SUPPORTS_NUMA_BALANCING
|
2015-10-29 08:16:04 +08:00
|
|
|
select ARCH_USE_BUILTIN_BSWAP
|
2013-09-05 19:26:17 +08:00
|
|
|
select ARCH_USE_CMPXCHG_LOCKREF
|
2016-04-01 21:42:15 +08:00
|
|
|
select ARCH_WANTS_DYNAMIC_TASK_STRUCT
|
2015-05-08 23:40:44 +08:00
|
|
|
select ARCH_WANTS_PROT_NUMA_PROT_NONE
|
2016-09-12 20:37:20 +08:00
|
|
|
select ARCH_WANTS_UBSAN_NO_NULL
|
2012-07-31 05:42:46 +08:00
|
|
|
select ARCH_WANT_IPC_PARSE_VERSION
|
2013-02-06 17:15:55 +08:00
|
|
|
select BUILDTIME_EXTABLE_SORT
|
|
|
|
|
select CLONE_BACKWARDS2
|
2014-08-15 19:16:09 +08:00
|
|
|
select DYNAMIC_FTRACE if FUNCTION_TRACER
|
2013-02-06 17:15:55 +08:00
|
|
|
select GENERIC_CLOCKEVENTS
|
2015-02-19 19:22:02 +08:00
|
|
|
select GENERIC_CPU_AUTOPROBE
|
2013-02-06 17:15:55 +08:00
|
|
|
select GENERIC_CPU_DEVICES if !SMP
|
2013-09-18 17:45:36 +08:00
|
|
|
select GENERIC_FIND_FIRST_BIT
|
2012-04-20 21:05:52 +08:00
|
|
|
select GENERIC_SMP_IDLE_THREAD
|
2013-11-22 17:04:53 +08:00
|
|
|
select GENERIC_TIME_VSYSCALL
|
2013-02-06 17:15:55 +08:00
|
|
|
select HAVE_ALIGNED_STRUCT_PAGE if SLUB
|
2014-02-25 17:16:24 +08:00
|
|
|
select HAVE_ARCH_AUDITSYSCALL
|
2015-05-08 23:40:44 +08:00
|
|
|
select HAVE_ARCH_EARLY_PFN_TO_NID
|
2016-07-08 02:38:39 +08:00
|
|
|
select HAVE_ARCH_HARDENED_USERCOPY
|
2015-02-12 20:08:27 +08:00
|
|
|
select HAVE_ARCH_JUMP_LABEL
|
lib/GCD.c: use binary GCD algorithm instead of Euclidean
The binary GCD algorithm is based on the following facts:
1. If a and b are all evens, then gcd(a,b) = 2 * gcd(a/2, b/2)
2. If a is even and b is odd, then gcd(a,b) = gcd(a/2, b)
3. If a and b are all odds, then gcd(a,b) = gcd((a-b)/2, b) = gcd((a+b)/2, b)
Even on x86 machines with reasonable division hardware, the binary
algorithm runs about 25% faster (80% the execution time) than the
division-based Euclidian algorithm.
On platforms like Alpha and ARMv6 where division is a function call to
emulation code, it's even more significant.
There are two variants of the code here, depending on whether a fast
__ffs (find least significant set bit) instruction is available. This
allows the unpredictable branches in the bit-at-a-time shifting loop to
be eliminated.
If fast __ffs is not available, the "even/odd" GCD variant is used.
I use the following code to benchmark:
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#define swap(a, b) \
do { \
a ^= b; \
b ^= a; \
a ^= b; \
} while (0)
unsigned long gcd0(unsigned long a, unsigned long b)
{
unsigned long r;
if (a < b) {
swap(a, b);
}
if (b == 0)
return a;
while ((r = a % b) != 0) {
a = b;
b = r;
}
return b;
}
unsigned long gcd1(unsigned long a, unsigned long b)
{
unsigned long r = a | b;
if (!a || !b)
return r;
b >>= __builtin_ctzl(b);
for (;;) {
a >>= __builtin_ctzl(a);
if (a == b)
return a << __builtin_ctzl(r);
if (a < b)
swap(a, b);
a -= b;
}
}
unsigned long gcd2(unsigned long a, unsigned long b)
{
unsigned long r = a | b;
if (!a || !b)
return r;
r &= -r;
while (!(b & r))
b >>= 1;
for (;;) {
while (!(a & r))
a >>= 1;
if (a == b)
return a;
if (a < b)
swap(a, b);
a -= b;
a >>= 1;
if (a & r)
a += b;
a >>= 1;
}
}
unsigned long gcd3(unsigned long a, unsigned long b)
{
unsigned long r = a | b;
if (!a || !b)
return r;
b >>= __builtin_ctzl(b);
if (b == 1)
return r & -r;
for (;;) {
a >>= __builtin_ctzl(a);
if (a == 1)
return r & -r;
if (a == b)
return a << __builtin_ctzl(r);
if (a < b)
swap(a, b);
a -= b;
}
}
unsigned long gcd4(unsigned long a, unsigned long b)
{
unsigned long r = a | b;
if (!a || !b)
return r;
r &= -r;
while (!(b & r))
b >>= 1;
if (b == r)
return r;
for (;;) {
while (!(a & r))
a >>= 1;
if (a == r)
return r;
if (a == b)
return a;
if (a < b)
swap(a, b);
a -= b;
a >>= 1;
if (a & r)
a += b;
a >>= 1;
}
}
static unsigned long (*gcd_func[])(unsigned long a, unsigned long b) = {
gcd0, gcd1, gcd2, gcd3, gcd4,
};
#define TEST_ENTRIES (sizeof(gcd_func) / sizeof(gcd_func[0]))
#if defined(__x86_64__)
#define rdtscll(val) do { \
unsigned long __a,__d; \
__asm__ __volatile__("rdtsc" : "=a" (__a), "=d" (__d)); \
(val) = ((unsigned long long)__a) | (((unsigned long long)__d)<<32); \
} while(0)
static unsigned long long benchmark_gcd_func(unsigned long (*gcd)(unsigned long, unsigned long),
unsigned long a, unsigned long b, unsigned long *res)
{
unsigned long long start, end;
unsigned long long ret;
unsigned long gcd_res;
rdtscll(start);
gcd_res = gcd(a, b);
rdtscll(end);
if (end >= start)
ret = end - start;
else
ret = ~0ULL - start + 1 + end;
*res = gcd_res;
return ret;
}
#else
static inline struct timespec read_time(void)
{
struct timespec time;
clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &time);
return time;
}
static inline unsigned long long diff_time(struct timespec start, struct timespec end)
{
struct timespec temp;
if ((end.tv_nsec - start.tv_nsec) < 0) {
temp.tv_sec = end.tv_sec - start.tv_sec - 1;
temp.tv_nsec = 1000000000ULL + end.tv_nsec - start.tv_nsec;
} else {
temp.tv_sec = end.tv_sec - start.tv_sec;
temp.tv_nsec = end.tv_nsec - start.tv_nsec;
}
return temp.tv_sec * 1000000000ULL + temp.tv_nsec;
}
static unsigned long long benchmark_gcd_func(unsigned long (*gcd)(unsigned long, unsigned long),
unsigned long a, unsigned long b, unsigned long *res)
{
struct timespec start, end;
unsigned long gcd_res;
start = read_time();
gcd_res = gcd(a, b);
end = read_time();
*res = gcd_res;
return diff_time(start, end);
}
#endif
static inline unsigned long get_rand()
{
if (sizeof(long) == 8)
return (unsigned long)rand() << 32 | rand();
else
return rand();
}
int main(int argc, char **argv)
{
unsigned int seed = time(0);
int loops = 100;
int repeats = 1000;
unsigned long (*res)[TEST_ENTRIES];
unsigned long long elapsed[TEST_ENTRIES];
int i, j, k;
for (;;) {
int opt = getopt(argc, argv, "n:r:s:");
/* End condition always first */
if (opt == -1)
break;
switch (opt) {
case 'n':
loops = atoi(optarg);
break;
case 'r':
repeats = atoi(optarg);
break;
case 's':
seed = strtoul(optarg, NULL, 10);
break;
default:
/* You won't actually get here. */
break;
}
}
res = malloc(sizeof(unsigned long) * TEST_ENTRIES * loops);
memset(elapsed, 0, sizeof(elapsed));
srand(seed);
for (j = 0; j < loops; j++) {
unsigned long a = get_rand();
/* Do we have args? */
unsigned long b = argc > optind ? strtoul(argv[optind], NULL, 10) : get_rand();
unsigned long long min_elapsed[TEST_ENTRIES];
for (k = 0; k < repeats; k++) {
for (i = 0; i < TEST_ENTRIES; i++) {
unsigned long long tmp = benchmark_gcd_func(gcd_func[i], a, b, &res[j][i]);
if (k == 0 || min_elapsed[i] > tmp)
min_elapsed[i] = tmp;
}
}
for (i = 0; i < TEST_ENTRIES; i++)
elapsed[i] += min_elapsed[i];
}
for (i = 0; i < TEST_ENTRIES; i++)
printf("gcd%d: elapsed %llu\n", i, elapsed[i]);
k = 0;
srand(seed);
for (j = 0; j < loops; j++) {
unsigned long a = get_rand();
unsigned long b = argc > optind ? strtoul(argv[optind], NULL, 10) : get_rand();
for (i = 1; i < TEST_ENTRIES; i++) {
if (res[j][i] != res[j][0])
break;
}
if (i < TEST_ENTRIES) {
if (k == 0) {
k = 1;
fprintf(stderr, "Error:\n");
}
fprintf(stderr, "gcd(%lu, %lu): ", a, b);
for (i = 0; i < TEST_ENTRIES; i++)
fprintf(stderr, "%ld%s", res[j][i], i < TEST_ENTRIES - 1 ? ", " : "\n");
}
}
if (k == 0)
fprintf(stderr, "PASS\n");
free(res);
return 0;
}
Compiled with "-O2", on "VirtualBox 4.4.0-22-generic #38-Ubuntu x86_64" got:
zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10
gcd0: elapsed 10174
gcd1: elapsed 2120
gcd2: elapsed 2902
gcd3: elapsed 2039
gcd4: elapsed 2812
PASS
zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10
gcd0: elapsed 9309
gcd1: elapsed 2280
gcd2: elapsed 2822
gcd3: elapsed 2217
gcd4: elapsed 2710
PASS
zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10
gcd0: elapsed 9589
gcd1: elapsed 2098
gcd2: elapsed 2815
gcd3: elapsed 2030
gcd4: elapsed 2718
PASS
zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10
gcd0: elapsed 9914
gcd1: elapsed 2309
gcd2: elapsed 2779
gcd3: elapsed 2228
gcd4: elapsed 2709
PASS
[akpm@linux-foundation.org: avoid #defining a CONFIG_ variable]
Signed-off-by: Zhaoxiu Zeng <zhaoxiu.zeng@gmail.com>
Signed-off-by: George Spelvin <linux@horizon.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-21 08:03:57 +08:00
|
|
|
select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES
|
2012-07-31 21:37:13 +08:00
|
|
|
select HAVE_ARCH_SECCOMP_FILTER
|
2015-04-22 20:47:42 +08:00
|
|
|
select HAVE_ARCH_SOFT_DIRTY
|
2013-02-06 17:15:55 +08:00
|
|
|
select HAVE_ARCH_TRACEHOOK
|
2015-02-12 20:08:27 +08:00
|
|
|
select HAVE_ARCH_TRANSPARENT_HUGEPAGE
|
2016-05-14 01:08:28 +08:00
|
|
|
select HAVE_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES
|
2013-02-06 17:15:55 +08:00
|
|
|
select HAVE_CMPXCHG_DOUBLE
|
|
|
|
|
select HAVE_CMPXCHG_LOCAL
|
|
|
|
|
select HAVE_DEBUG_KMEMLEAK
|
2016-02-03 13:46:34 +08:00
|
|
|
select HAVE_DMA_API_DEBUG
|
2016-11-14 20:57:03 +08:00
|
|
|
select HAVE_DMA_CONTIGUOUS
|
2015-02-12 20:08:27 +08:00
|
|
|
select HAVE_DYNAMIC_FTRACE
|
|
|
|
|
select HAVE_DYNAMIC_FTRACE_WITH_REGS
|
2016-09-12 19:13:38 +08:00
|
|
|
select HAVE_EFFICIENT_UNALIGNED_ACCESS
|
2016-05-21 08:00:16 +08:00
|
|
|
select HAVE_EXIT_THREAD
|
2013-02-06 17:15:55 +08:00
|
|
|
select HAVE_FTRACE_MCOUNT_RECORD
|
2015-02-12 20:08:27 +08:00
|
|
|
select HAVE_FUNCTION_GRAPH_TRACER
|
|
|
|
|
select HAVE_FUNCTION_TRACER
|
2014-03-02 20:09:47 +08:00
|
|
|
select HAVE_FUTEX_CMPXCHG if FUTEX
|
2013-02-06 17:15:55 +08:00
|
|
|
select HAVE_KERNEL_BZIP2
|
|
|
|
|
select HAVE_KERNEL_GZIP
|
2013-07-18 21:18:24 +08:00
|
|
|
select HAVE_KERNEL_LZ4
|
2013-02-06 17:15:55 +08:00
|
|
|
select HAVE_KERNEL_LZMA
|
|
|
|
|
select HAVE_KERNEL_LZO
|
|
|
|
|
select HAVE_KERNEL_XZ
|
|
|
|
|
select HAVE_KPROBES
|
|
|
|
|
select HAVE_KRETPROBES
|
2015-02-12 20:08:27 +08:00
|
|
|
select HAVE_KVM
|
2015-03-26 17:10:17 +08:00
|
|
|
select HAVE_LIVEPATCH
|
2013-02-06 17:15:55 +08:00
|
|
|
select HAVE_MEMBLOCK
|
|
|
|
|
select HAVE_MEMBLOCK_NODE_MAP
|
2014-01-30 01:16:01 +08:00
|
|
|
select HAVE_MEMBLOCK_PHYS_MAP
|
2012-09-28 13:01:03 +08:00
|
|
|
select HAVE_MOD_ARCH_SPECIFIC
|
2013-02-06 17:15:55 +08:00
|
|
|
select HAVE_OPROFILE
|
|
|
|
|
select HAVE_PERF_EVENTS
|
|
|
|
|
select HAVE_REGS_AND_STACK_ACCESS_API
|
|
|
|
|
select HAVE_SYSCALL_TRACEPOINTS
|
|
|
|
|
select HAVE_VIRT_CPU_ACCOUNTING
|
2012-09-28 13:01:03 +08:00
|
|
|
select MODULES_USE_ELF_RELA
|
2014-01-30 01:16:01 +08:00
|
|
|
select NO_BOOTMEM
|
2012-12-26 08:26:12 +08:00
|
|
|
select OLD_SIGACTION
|
2013-09-06 16:03:30 +08:00
|
|
|
select OLD_SIGSUSPEND3
|
2016-06-02 20:57:17 +08:00
|
|
|
select SPARSE_IRQ
|
2013-02-06 17:15:55 +08:00
|
|
|
select SYSCTL_EXCEPTION_TRACE
|
2016-11-08 18:08:26 +08:00
|
|
|
select THREAD_INFO_IN_TASK
|
2014-02-27 10:13:06 +08:00
|
|
|
select TTY
|
2013-02-06 17:15:55 +08:00
|
|
|
select VIRT_CPU_ACCOUNTING
|
2016-11-15 10:06:51 +08:00
|
|
|
select ARCH_HAS_SCALED_CPUTIME
|
2013-09-06 16:03:30 +08:00
|
|
|
select VIRT_TO_BUS
|
2016-05-21 08:00:33 +08:00
|
|
|
select HAVE_NMI
|
2014-03-07 01:25:13 +08:00
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2009-07-07 22:37:10 +08:00
|
|
|
config SCHED_OMIT_FRAME_POINTER
|
2011-01-05 19:47:15 +08:00
|
|
|
def_bool y
|
2009-07-07 22:37:10 +08:00
|
|
|
|
2015-04-15 06:46:00 +08:00
|
|
|
config PGTABLE_LEVELS
|
|
|
|
|
int
|
2015-12-28 19:53:51 +08:00
|
|
|
default 4
|
2015-04-15 06:46:00 +08:00
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
source "init/Kconfig"
|
|
|
|
|
|
2008-10-19 11:27:21 +08:00
|
|
|
source "kernel/Kconfig.freezer"
|
|
|
|
|
|
2015-03-26 17:10:17 +08:00
|
|
|
source "kernel/livepatch/Kconfig"
|
|
|
|
|
|
2012-08-27 16:55:18 +08:00
|
|
|
menu "Processor type and features"
|
|
|
|
|
|
|
|
|
|
config HAVE_MARCH_Z900_FEATURES
|
|
|
|
|
def_bool n
|
|
|
|
|
|
|
|
|
|
config HAVE_MARCH_Z990_FEATURES
|
|
|
|
|
def_bool n
|
|
|
|
|
select HAVE_MARCH_Z900_FEATURES
|
|
|
|
|
|
|
|
|
|
config HAVE_MARCH_Z9_109_FEATURES
|
|
|
|
|
def_bool n
|
|
|
|
|
select HAVE_MARCH_Z990_FEATURES
|
|
|
|
|
|
|
|
|
|
config HAVE_MARCH_Z10_FEATURES
|
|
|
|
|
def_bool n
|
|
|
|
|
select HAVE_MARCH_Z9_109_FEATURES
|
|
|
|
|
|
|
|
|
|
config HAVE_MARCH_Z196_FEATURES
|
|
|
|
|
def_bool n
|
|
|
|
|
select HAVE_MARCH_Z10_FEATURES
|
|
|
|
|
|
2012-11-13 16:26:37 +08:00
|
|
|
config HAVE_MARCH_ZEC12_FEATURES
|
|
|
|
|
def_bool n
|
|
|
|
|
select HAVE_MARCH_Z196_FEATURES
|
|
|
|
|
|
2015-01-15 00:50:19 +08:00
|
|
|
config HAVE_MARCH_Z13_FEATURES
|
|
|
|
|
def_bool n
|
|
|
|
|
select HAVE_MARCH_ZEC12_FEATURES
|
|
|
|
|
|
2012-08-27 16:55:18 +08:00
|
|
|
choice
|
|
|
|
|
prompt "Processor type"
|
2016-04-18 23:10:16 +08:00
|
|
|
default MARCH_Z196
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2012-08-27 16:55:18 +08:00
|
|
|
config MARCH_Z900
|
|
|
|
|
bool "IBM zSeries model z800 and z900"
|
2015-02-12 20:08:27 +08:00
|
|
|
select HAVE_MARCH_Z900_FEATURES
|
2012-08-27 16:55:18 +08:00
|
|
|
help
|
|
|
|
|
Select this to enable optimizations for model z800/z900 (2064 and
|
|
|
|
|
2066 series). This will enable some optimizations that are not
|
|
|
|
|
available on older ESA/390 (31 Bit) only CPUs.
|
|
|
|
|
|
|
|
|
|
config MARCH_Z990
|
|
|
|
|
bool "IBM zSeries model z890 and z990"
|
2015-02-12 20:08:27 +08:00
|
|
|
select HAVE_MARCH_Z990_FEATURES
|
2012-08-27 16:55:18 +08:00
|
|
|
help
|
|
|
|
|
Select this to enable optimizations for model z890/z990 (2084 and
|
|
|
|
|
2086 series). The kernel will be slightly faster but will not work
|
|
|
|
|
on older machines.
|
|
|
|
|
|
|
|
|
|
config MARCH_Z9_109
|
|
|
|
|
bool "IBM System z9"
|
2015-02-12 20:08:27 +08:00
|
|
|
select HAVE_MARCH_Z9_109_FEATURES
|
2012-08-27 16:55:18 +08:00
|
|
|
help
|
|
|
|
|
Select this to enable optimizations for IBM System z9 (2094 and
|
|
|
|
|
2096 series). The kernel will be slightly faster but will not work
|
|
|
|
|
on older machines.
|
|
|
|
|
|
|
|
|
|
config MARCH_Z10
|
|
|
|
|
bool "IBM System z10"
|
2015-02-12 20:08:27 +08:00
|
|
|
select HAVE_MARCH_Z10_FEATURES
|
2012-08-27 16:55:18 +08:00
|
|
|
help
|
|
|
|
|
Select this to enable optimizations for IBM System z10 (2097 and
|
|
|
|
|
2098 series). The kernel will be slightly faster but will not work
|
|
|
|
|
on older machines.
|
|
|
|
|
|
|
|
|
|
config MARCH_Z196
|
|
|
|
|
bool "IBM zEnterprise 114 and 196"
|
2015-02-12 20:08:27 +08:00
|
|
|
select HAVE_MARCH_Z196_FEATURES
|
2012-08-27 16:55:18 +08:00
|
|
|
help
|
|
|
|
|
Select this to enable optimizations for IBM zEnterprise 114 and 196
|
|
|
|
|
(2818 and 2817 series). The kernel will be slightly faster but will
|
|
|
|
|
not work on older machines.
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2012-11-13 16:26:37 +08:00
|
|
|
config MARCH_ZEC12
|
2013-07-24 16:35:33 +08:00
|
|
|
bool "IBM zBC12 and zEC12"
|
2015-02-12 20:08:27 +08:00
|
|
|
select HAVE_MARCH_ZEC12_FEATURES
|
2012-11-13 16:26:37 +08:00
|
|
|
help
|
2013-07-24 16:35:33 +08:00
|
|
|
Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
|
|
|
|
|
2827 series). The kernel will be slightly faster but will not work on
|
|
|
|
|
older machines.
|
2012-11-13 16:26:37 +08:00
|
|
|
|
2015-01-15 00:50:19 +08:00
|
|
|
config MARCH_Z13
|
2016-02-19 17:46:08 +08:00
|
|
|
bool "IBM z13s and z13"
|
2015-02-12 20:08:27 +08:00
|
|
|
select HAVE_MARCH_Z13_FEATURES
|
2015-01-15 00:50:19 +08:00
|
|
|
help
|
2016-02-19 17:46:08 +08:00
|
|
|
Select this to enable optimizations for IBM z13s and z13 (2965 and
|
|
|
|
|
2964 series). The kernel will be slightly faster but will not work on
|
|
|
|
|
older machines.
|
2015-01-15 00:50:19 +08:00
|
|
|
|
2012-08-27 16:55:18 +08:00
|
|
|
endchoice
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2013-10-30 19:12:50 +08:00
|
|
|
config MARCH_Z900_TUNE
|
|
|
|
|
def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT
|
|
|
|
|
|
|
|
|
|
config MARCH_Z990_TUNE
|
|
|
|
|
def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT
|
|
|
|
|
|
|
|
|
|
config MARCH_Z9_109_TUNE
|
|
|
|
|
def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT
|
|
|
|
|
|
|
|
|
|
config MARCH_Z10_TUNE
|
|
|
|
|
def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
|
|
|
|
|
|
|
|
|
|
config MARCH_Z196_TUNE
|
|
|
|
|
def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
|
|
|
|
|
|
|
|
|
|
config MARCH_ZEC12_TUNE
|
|
|
|
|
def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
|
|
|
|
|
|
2015-01-15 00:50:19 +08:00
|
|
|
config MARCH_Z13_TUNE
|
|
|
|
|
def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
|
|
|
|
|
|
2013-10-30 19:12:50 +08:00
|
|
|
choice
|
|
|
|
|
prompt "Tune code generation"
|
|
|
|
|
default TUNE_DEFAULT
|
|
|
|
|
help
|
|
|
|
|
Cause the compiler to tune (-mtune) the generated code for a machine.
|
|
|
|
|
This will make the code run faster on the selected machine but
|
|
|
|
|
somewhat slower on other machines.
|
|
|
|
|
This option only changes how the compiler emits instructions, not the
|
|
|
|
|
selection of instructions itself, so the resulting kernel will run on
|
|
|
|
|
all other machines.
|
|
|
|
|
|
|
|
|
|
config TUNE_DEFAULT
|
|
|
|
|
bool "Default"
|
|
|
|
|
help
|
|
|
|
|
Tune the generated code for the target processor for which the kernel
|
|
|
|
|
will be compiled.
|
|
|
|
|
|
|
|
|
|
config TUNE_Z900
|
|
|
|
|
bool "IBM zSeries model z800 and z900"
|
|
|
|
|
|
|
|
|
|
config TUNE_Z990
|
|
|
|
|
bool "IBM zSeries model z890 and z990"
|
|
|
|
|
|
|
|
|
|
config TUNE_Z9_109
|
|
|
|
|
bool "IBM System z9"
|
|
|
|
|
|
|
|
|
|
config TUNE_Z10
|
|
|
|
|
bool "IBM System z10"
|
|
|
|
|
|
|
|
|
|
config TUNE_Z196
|
|
|
|
|
bool "IBM zEnterprise 114 and 196"
|
|
|
|
|
|
|
|
|
|
config TUNE_ZEC12
|
|
|
|
|
bool "IBM zBC12 and zEC12"
|
|
|
|
|
|
2015-01-15 00:50:19 +08:00
|
|
|
config TUNE_Z13
|
|
|
|
|
bool "IBM z13"
|
|
|
|
|
|
2013-10-30 19:12:50 +08:00
|
|
|
endchoice
|
|
|
|
|
|
2006-01-06 16:19:28 +08:00
|
|
|
config 64BIT
|
2011-01-05 19:47:15 +08:00
|
|
|
def_bool y
|
2006-09-28 22:55:39 +08:00
|
|
|
|
2012-08-27 16:55:18 +08:00
|
|
|
config COMPAT
|
|
|
|
|
def_bool y
|
|
|
|
|
prompt "Kernel support for 31 bit emulation"
|
|
|
|
|
select COMPAT_BINFMT_ELF if BINFMT_ELF
|
|
|
|
|
select ARCH_WANT_OLD_COMPAT_IPC
|
2012-12-26 08:26:12 +08:00
|
|
|
select COMPAT_OLD_SIGACTION
|
kernel: conditionally support non-root users, groups and capabilities
There are a lot of embedded systems that run most or all of their
functionality in init, running as root:root. For these systems,
supporting multiple users is not necessary.
This patch adds a new symbol, CONFIG_MULTIUSER, that makes support for
non-root users, non-root groups, and capabilities optional. It is enabled
under CONFIG_EXPERT menu.
When this symbol is not defined, UID and GID are zero in any possible case
and processes always have all capabilities.
The following syscalls are compiled out: setuid, setregid, setgid,
setreuid, setresuid, getresuid, setresgid, getresgid, setgroups,
getgroups, setfsuid, setfsgid, capget, capset.
Also, groups.c is compiled out completely.
In kernel/capability.c, capable function was moved in order to avoid
adding two ifdef blocks.
This change saves about 25 KB on a defconfig build. The most minimal
kernels have total text sizes in the high hundreds of kB rather than
low MB. (The 25k goes down a bit with allnoconfig, but not that much.
The kernel was booted in Qemu. All the common functionalities work.
Adding users/groups is not possible, failing with -ENOSYS.
Bloat-o-meter output:
add/remove: 7/87 grow/shrink: 19/397 up/down: 1675/-26325 (-24650)
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Iulia Manda <iulia.manda21@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-04-16 07:16:41 +08:00
|
|
|
depends on MULTIUSER
|
2012-08-27 16:55:18 +08:00
|
|
|
help
|
|
|
|
|
Select this option if you want to enable your system kernel to
|
|
|
|
|
handle system-calls from ELF binaries for 31 bit ESA. This option
|
|
|
|
|
(and some other stuff like libraries and such) is needed for
|
|
|
|
|
executing 31 bit applications. It is safe to say "Y".
|
|
|
|
|
|
|
|
|
|
config SYSVIPC_COMPAT
|
|
|
|
|
def_bool y if COMPAT && SYSVIPC
|
|
|
|
|
|
|
|
|
|
config KEYS_COMPAT
|
|
|
|
|
def_bool y if COMPAT && KEYS
|
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
config SMP
|
2011-01-05 19:47:15 +08:00
|
|
|
def_bool y
|
|
|
|
|
prompt "Symmetric multi-processing support"
|
2005-04-17 06:20:36 +08:00
|
|
|
---help---
|
|
|
|
|
This enables support for systems with more than one CPU. If you have
|
|
|
|
|
a system with only one CPU, like most personal computers, say N. If
|
|
|
|
|
you have a system with more than one CPU, say Y.
|
|
|
|
|
|
2014-01-24 07:55:29 +08:00
|
|
|
If you say N here, the kernel will run on uni- and multiprocessor
|
2005-04-17 06:20:36 +08:00
|
|
|
machines, but will use only one CPU of a multiprocessor machine. If
|
|
|
|
|
you say Y here, the kernel will run on many, but not all,
|
2014-01-24 07:55:29 +08:00
|
|
|
uniprocessor machines. On a uniprocessor machine, the kernel
|
2005-04-17 06:20:36 +08:00
|
|
|
will run faster if you say N here.
|
|
|
|
|
|
2008-02-03 21:50:21 +08:00
|
|
|
See also the SMP-HOWTO available at
|
|
|
|
|
<http://www.tldp.org/docs.html#howto>.
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
Even if you don't know what to do here, say Y.
|
|
|
|
|
|
|
|
|
|
config NR_CPUS
|
2015-01-28 23:52:01 +08:00
|
|
|
int "Maximum number of CPUs (2-512)"
|
|
|
|
|
range 2 512
|
2005-04-17 06:20:36 +08:00
|
|
|
depends on SMP
|
2015-02-12 20:08:27 +08:00
|
|
|
default "64"
|
2005-04-17 06:20:36 +08:00
|
|
|
help
|
|
|
|
|
This allows you to specify the maximum number of CPUs which this
|
2015-01-28 23:52:01 +08:00
|
|
|
kernel will support. The maximum supported value is 512 and the
|
2005-04-17 06:20:36 +08:00
|
|
|
minimum value which makes sense is 2.
|
|
|
|
|
|
|
|
|
|
This is purely to save memory - each supported CPU adds
|
|
|
|
|
approximately sixteen kilobytes to the kernel image.
|
|
|
|
|
|
|
|
|
|
config HOTPLUG_CPU
|
2011-01-05 19:47:15 +08:00
|
|
|
def_bool y
|
|
|
|
|
prompt "Support for hot-pluggable CPUs"
|
2005-04-17 06:20:36 +08:00
|
|
|
depends on SMP
|
|
|
|
|
help
|
|
|
|
|
Say Y here to be able to turn CPUs off and on. CPUs
|
|
|
|
|
can be controlled through /sys/devices/system/cpu/cpu#.
|
|
|
|
|
Say N if you want to disable CPU hotplug.
|
|
|
|
|
|
2014-03-07 01:25:13 +08:00
|
|
|
# Some NUMA nodes have memory ranges that span
|
|
|
|
|
# other nodes. Even though a pfn is valid and
|
|
|
|
|
# between a node's start and end pfns, it may not
|
|
|
|
|
# reside on that node. See memmap_init_zone()
|
|
|
|
|
# for details. <- They meant memory holes!
|
|
|
|
|
config NODES_SPAN_OTHER_NODES
|
|
|
|
|
def_bool NUMA
|
|
|
|
|
|
|
|
|
|
config NUMA
|
|
|
|
|
bool "NUMA support"
|
2015-12-28 19:53:51 +08:00
|
|
|
depends on SMP && SCHED_TOPOLOGY
|
2014-03-07 01:25:13 +08:00
|
|
|
default n
|
|
|
|
|
help
|
|
|
|
|
Enable NUMA support
|
|
|
|
|
|
|
|
|
|
This option adds NUMA support to the kernel.
|
|
|
|
|
|
|
|
|
|
An operation mode can be selected by appending
|
|
|
|
|
numa=<method> to the kernel command line.
|
|
|
|
|
|
|
|
|
|
The default behaviour is identical to appending numa=plain to
|
|
|
|
|
the command line. This will create just one node with all
|
|
|
|
|
available memory and all CPUs in it.
|
|
|
|
|
|
|
|
|
|
config NODES_SHIFT
|
|
|
|
|
int "Maximum NUMA nodes (as a power of 2)"
|
|
|
|
|
range 1 10
|
|
|
|
|
depends on NUMA
|
|
|
|
|
default "4"
|
|
|
|
|
help
|
|
|
|
|
Specify the maximum number of NUMA nodes available on the target
|
|
|
|
|
system. Increases memory reserved to accommodate various tables.
|
|
|
|
|
|
2014-03-07 01:47:21 +08:00
|
|
|
menu "Select NUMA modes"
|
|
|
|
|
depends on NUMA
|
|
|
|
|
|
|
|
|
|
config NUMA_EMU
|
|
|
|
|
bool "NUMA emulation"
|
|
|
|
|
default y
|
|
|
|
|
help
|
|
|
|
|
Numa emulation mode will split the available system memory into
|
|
|
|
|
equal chunks which then are distributed over the configured number
|
|
|
|
|
of nodes in a round-robin manner.
|
|
|
|
|
|
|
|
|
|
The number of fake nodes is limited by the number of available memory
|
|
|
|
|
chunks (i.e. memory size / fake size) and the number of supported
|
|
|
|
|
nodes in the kernel.
|
|
|
|
|
|
|
|
|
|
The CPUs are assigned to the nodes in a way that partially respects
|
|
|
|
|
the original machine topology (if supported by the machine).
|
|
|
|
|
Fair distribution of the CPUs is not guaranteed.
|
|
|
|
|
|
|
|
|
|
config EMU_SIZE
|
|
|
|
|
hex "NUMA emulation memory chunk size"
|
|
|
|
|
default 0x10000000
|
|
|
|
|
range 0x400000 0x100000000
|
|
|
|
|
depends on NUMA_EMU
|
|
|
|
|
help
|
|
|
|
|
Select the default size by which the memory is chopped and then
|
|
|
|
|
assigned to emulated NUMA nodes.
|
|
|
|
|
|
|
|
|
|
This can be overridden by specifying
|
|
|
|
|
|
|
|
|
|
emu_size=<n>
|
|
|
|
|
|
|
|
|
|
on the kernel command line where also suffixes K, M, G, and T are
|
|
|
|
|
supported.
|
|
|
|
|
|
|
|
|
|
endmenu
|
2015-12-28 20:20:43 +08:00
|
|
|
|
|
|
|
|
config SCHED_SMT
|
|
|
|
|
def_bool n
|
2014-03-07 01:47:21 +08:00
|
|
|
|
2010-10-29 22:50:37 +08:00
|
|
|
config SCHED_MC
|
2011-12-27 18:27:09 +08:00
|
|
|
def_bool n
|
2010-10-29 22:50:37 +08:00
|
|
|
|
2010-08-31 16:28:18 +08:00
|
|
|
config SCHED_BOOK
|
2015-01-15 00:52:10 +08:00
|
|
|
def_bool n
|
|
|
|
|
|
2016-05-25 16:25:50 +08:00
|
|
|
config SCHED_DRAWER
|
|
|
|
|
def_bool n
|
|
|
|
|
|
2015-01-15 00:52:10 +08:00
|
|
|
config SCHED_TOPOLOGY
|
2011-01-05 19:47:15 +08:00
|
|
|
def_bool y
|
2015-01-15 00:52:10 +08:00
|
|
|
prompt "Topology scheduler support"
|
2011-12-27 18:27:09 +08:00
|
|
|
depends on SMP
|
2015-01-15 00:52:10 +08:00
|
|
|
select SCHED_SMT
|
2011-12-27 18:27:09 +08:00
|
|
|
select SCHED_MC
|
2015-01-15 00:52:10 +08:00
|
|
|
select SCHED_BOOK
|
2016-05-25 16:25:50 +08:00
|
|
|
select SCHED_DRAWER
|
2010-08-31 16:28:18 +08:00
|
|
|
help
|
2015-01-15 00:52:10 +08:00
|
|
|
Topology scheduler support improves the CPU scheduler's decision
|
|
|
|
|
making when dealing with machines that have multi-threading,
|
|
|
|
|
multiple cores or multiple books.
|
2010-08-31 16:28:18 +08:00
|
|
|
|
2012-08-27 16:55:18 +08:00
|
|
|
source kernel/Kconfig.preempt
|
|
|
|
|
|
|
|
|
|
source kernel/Kconfig.hz
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2012-08-27 16:55:18 +08:00
|
|
|
endmenu
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2012-08-27 16:55:18 +08:00
|
|
|
menu "Memory setup"
|
2012-02-25 01:01:27 +08:00
|
|
|
|
2012-08-27 16:55:18 +08:00
|
|
|
config ARCH_SPARSEMEM_ENABLE
|
2011-01-05 19:47:15 +08:00
|
|
|
def_bool y
|
2012-08-27 16:55:18 +08:00
|
|
|
select SPARSEMEM_VMEMMAP_ENABLE
|
|
|
|
|
select SPARSEMEM_VMEMMAP
|
2006-09-12 15:04:40 +08:00
|
|
|
|
2012-08-27 16:55:18 +08:00
|
|
|
config ARCH_SPARSEMEM_DEFAULT
|
|
|
|
|
def_bool y
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2012-08-27 16:55:18 +08:00
|
|
|
config ARCH_SELECT_MEMORY_MODEL
|
|
|
|
|
def_bool y
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2012-08-27 16:55:18 +08:00
|
|
|
config ARCH_ENABLE_MEMORY_HOTPLUG
|
|
|
|
|
def_bool y if SPARSEMEM
|
2006-09-28 22:55:46 +08:00
|
|
|
|
2012-08-27 16:55:18 +08:00
|
|
|
config ARCH_ENABLE_MEMORY_HOTREMOVE
|
|
|
|
|
def_bool y
|
2008-12-25 20:39:19 +08:00
|
|
|
|
2014-02-12 21:16:18 +08:00
|
|
|
config ARCH_ENABLE_SPLIT_PMD_PTLOCK
|
|
|
|
|
def_bool y
|
|
|
|
|
|
2012-08-27 16:55:18 +08:00
|
|
|
config FORCE_MAX_ZONEORDER
|
|
|
|
|
int
|
|
|
|
|
default "9"
|
2010-10-25 22:10:17 +08:00
|
|
|
|
2012-08-27 16:55:18 +08:00
|
|
|
source "mm/Kconfig"
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
config PACK_STACK
|
2011-01-05 19:47:15 +08:00
|
|
|
def_bool y
|
|
|
|
|
prompt "Pack kernel stack"
|
2005-04-17 06:20:36 +08:00
|
|
|
help
|
|
|
|
|
This option enables the compiler option -mkernel-backchain if it
|
|
|
|
|
is available. If the option is available the compiler supports
|
|
|
|
|
the new stack layout which dramatically reduces the minimum stack
|
|
|
|
|
frame size. With an old compiler a non-leaf function needs a
|
|
|
|
|
minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
|
|
|
|
|
-mkernel-backchain the minimum size drops to 16 byte on 31 bit
|
|
|
|
|
and 24 byte on 64 bit.
|
|
|
|
|
|
|
|
|
|
Say Y if you are unsure.
|
|
|
|
|
|
|
|
|
|
config CHECK_STACK
|
2011-01-05 19:47:15 +08:00
|
|
|
def_bool y
|
|
|
|
|
prompt "Detect kernel stack overflow"
|
2005-04-17 06:20:36 +08:00
|
|
|
help
|
|
|
|
|
This option enables the compiler option -mstack-guard and
|
|
|
|
|
-mstack-size if they are available. If the compiler supports them
|
|
|
|
|
it will emit additional code to each function prolog to trigger
|
|
|
|
|
an illegal operation if the kernel stack is about to overflow.
|
|
|
|
|
|
|
|
|
|
Say N if you are unsure.
|
|
|
|
|
|
|
|
|
|
config STACK_GUARD
|
|
|
|
|
int "Size of the guard area (128-1024)"
|
|
|
|
|
range 128 1024
|
|
|
|
|
depends on CHECK_STACK
|
|
|
|
|
default "256"
|
|
|
|
|
help
|
|
|
|
|
This allows you to specify the size of the guard area at the lower
|
|
|
|
|
end of the kernel stack. If the kernel stack points into the guard
|
|
|
|
|
area on function entry an illegal operation is triggered. The size
|
|
|
|
|
needs to be a power of 2. Please keep in mind that the size of an
|
|
|
|
|
interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
|
|
|
|
|
The minimum size for the stack guard should be 256 for 31 bit and
|
|
|
|
|
512 for 64 bit.
|
|
|
|
|
|
2011-03-16 00:08:19 +08:00
|
|
|
config WARN_DYNAMIC_STACK
|
2011-01-05 19:47:15 +08:00
|
|
|
def_bool n
|
2011-03-16 00:08:19 +08:00
|
|
|
prompt "Emit compiler warnings for function with dynamic stack usage"
|
2005-04-17 06:20:36 +08:00
|
|
|
help
|
2011-03-16 00:08:19 +08:00
|
|
|
This option enables the compiler option -mwarn-dynamicstack. If the
|
|
|
|
|
compiler supports this options generates warnings for functions
|
|
|
|
|
that dynamically allocate stack space using alloca.
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
Say N if you are unsure.
|
|
|
|
|
|
2012-08-27 16:55:18 +08:00
|
|
|
endmenu
|
2005-06-23 15:07:43 +08:00
|
|
|
|
2012-08-27 16:55:18 +08:00
|
|
|
menu "I/O subsystem"
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
config QDIO
|
2011-01-05 19:47:15 +08:00
|
|
|
def_tristate y
|
|
|
|
|
prompt "QDIO support"
|
2005-04-17 06:20:36 +08:00
|
|
|
---help---
|
2006-01-06 16:19:20 +08:00
|
|
|
This driver provides the Queued Direct I/O base support for
|
2008-04-17 13:46:19 +08:00
|
|
|
IBM System z.
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
To compile this driver as a module, choose M here: the
|
|
|
|
|
module will be called qdio.
|
|
|
|
|
|
|
|
|
|
If unsure, say Y.
|
|
|
|
|
|
2012-11-29 21:38:46 +08:00
|
|
|
menuconfig PCI
|
|
|
|
|
bool "PCI support"
|
|
|
|
|
select PCI_MSI
|
2015-08-27 21:33:03 +08:00
|
|
|
select IOMMU_SUPPORT
|
2012-11-29 21:38:46 +08:00
|
|
|
help
|
|
|
|
|
Enable PCI support.
|
|
|
|
|
|
|
|
|
|
if PCI
|
|
|
|
|
|
|
|
|
|
config PCI_NR_FUNCTIONS
|
|
|
|
|
int "Maximum number of PCI functions (1-4096)"
|
|
|
|
|
range 1 4096
|
|
|
|
|
default "64"
|
|
|
|
|
help
|
|
|
|
|
This allows you to specify the maximum number of PCI functions which
|
|
|
|
|
this kernel will support.
|
|
|
|
|
|
|
|
|
|
source "drivers/pci/Kconfig"
|
|
|
|
|
|
|
|
|
|
endif # PCI
|
|
|
|
|
|
|
|
|
|
config PCI_DOMAINS
|
|
|
|
|
def_bool PCI
|
|
|
|
|
|
|
|
|
|
config HAS_IOMEM
|
|
|
|
|
def_bool PCI
|
|
|
|
|
|
|
|
|
|
config IOMMU_HELPER
|
|
|
|
|
def_bool PCI
|
|
|
|
|
|
|
|
|
|
config NEED_SG_DMA_LENGTH
|
|
|
|
|
def_bool PCI
|
|
|
|
|
|
2012-12-05 22:06:01 +08:00
|
|
|
config NEED_DMA_MAP_STATE
|
|
|
|
|
def_bool PCI
|
|
|
|
|
|
2008-07-14 15:59:05 +08:00
|
|
|
config CHSC_SCH
|
2011-01-31 18:30:09 +08:00
|
|
|
def_tristate m
|
2011-01-05 19:47:15 +08:00
|
|
|
prompt "Support for CHSC subchannels"
|
2008-07-14 15:59:05 +08:00
|
|
|
help
|
|
|
|
|
This driver allows usage of CHSC subchannels. A CHSC subchannel
|
|
|
|
|
is usually present on LPAR only.
|
|
|
|
|
The driver creates a device /dev/chsc, which may be used to
|
|
|
|
|
obtain I/O configuration information about the machine and
|
|
|
|
|
to issue asynchronous chsc commands (DANGEROUS).
|
|
|
|
|
You will usually only want to use this interface on a special
|
|
|
|
|
LPAR designated for system management.
|
|
|
|
|
|
|
|
|
|
To compile this driver as a module, choose M here: the
|
|
|
|
|
module will be called chsc_sch.
|
|
|
|
|
|
|
|
|
|
If unsure, say N.
|
|
|
|
|
|
2012-08-28 22:46:26 +08:00
|
|
|
config SCM_BUS
|
|
|
|
|
def_bool y
|
|
|
|
|
prompt "SCM bus driver"
|
|
|
|
|
help
|
|
|
|
|
Bus driver for Storage Class Memory.
|
|
|
|
|
|
2012-08-28 22:48:16 +08:00
|
|
|
config EADM_SCH
|
|
|
|
|
def_tristate m
|
|
|
|
|
prompt "Support for EADM subchannels"
|
|
|
|
|
depends on SCM_BUS
|
|
|
|
|
help
|
|
|
|
|
This driver allows usage of EADM subchannels. EADM subchannels act
|
|
|
|
|
as a communication vehicle for SCM increments.
|
|
|
|
|
|
|
|
|
|
To compile this driver as a module, choose M here: the
|
|
|
|
|
module will be called eadm_sch.
|
|
|
|
|
|
2012-08-27 16:55:18 +08:00
|
|
|
endmenu
|
|
|
|
|
|
|
|
|
|
menu "Dump support"
|
|
|
|
|
|
|
|
|
|
config CRASH_DUMP
|
|
|
|
|
bool "kernel crash dumps"
|
2015-02-12 20:08:27 +08:00
|
|
|
depends on SMP
|
2012-08-27 16:55:18 +08:00
|
|
|
select KEXEC
|
|
|
|
|
help
|
|
|
|
|
Generate crash dump after being started by kexec.
|
|
|
|
|
Crash dump kernels are loaded in the main kernel with kexec-tools
|
|
|
|
|
into a specially reserved region and then later executed after
|
|
|
|
|
a crash by kdump/kexec.
|
|
|
|
|
Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
|
2014-04-14 16:38:05 +08:00
|
|
|
This option also enables s390 zfcpdump.
|
|
|
|
|
See also <file:Documentation/s390/zfcpdump.txt>
|
2012-08-27 16:55:18 +08:00
|
|
|
|
|
|
|
|
endmenu
|
|
|
|
|
|
|
|
|
|
menu "Executable file formats / Emulations"
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
|
source "fs/Kconfig.binfmt"
|
|
|
|
|
|
2012-08-27 16:55:18 +08:00
|
|
|
config SECCOMP
|
|
|
|
|
def_bool y
|
|
|
|
|
prompt "Enable seccomp to safely compute untrusted bytecode"
|
|
|
|
|
depends on PROC_FS
|
|
|
|
|
help
|
|
|
|
|
This kernel feature is useful for number crunching applications
|
|
|
|
|
that may need to compute untrusted bytecode during their
|
|
|
|
|
execution. By using pipes or other transports made available to
|
|
|
|
|
the process as file descriptors supporting the read/write
|
|
|
|
|
syscalls, it's possible to isolate those applications in
|
|
|
|
|
their own address space using seccomp. Once seccomp is
|
|
|
|
|
enabled via /proc/<pid>/seccomp, it cannot be disabled
|
|
|
|
|
and the task is only allowed to execute a few safe syscalls
|
|
|
|
|
defined by each seccomp mode.
|
|
|
|
|
|
|
|
|
|
If unsure, say Y.
|
|
|
|
|
|
|
|
|
|
endmenu
|
|
|
|
|
|
|
|
|
|
menu "Power Management"
|
|
|
|
|
|
|
|
|
|
config ARCH_HIBERNATION_POSSIBLE
|
2015-02-12 20:08:27 +08:00
|
|
|
def_bool y
|
2012-08-27 16:55:18 +08:00
|
|
|
|
|
|
|
|
source "kernel/power/Kconfig"
|
|
|
|
|
|
|
|
|
|
endmenu
|
|
|
|
|
|
|
|
|
|
source "net/Kconfig"
|
|
|
|
|
|
|
|
|
|
config PCMCIA
|
|
|
|
|
def_bool n
|
|
|
|
|
|
|
|
|
|
config CCW
|
|
|
|
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def_bool y
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|
|
source "drivers/Kconfig"
|
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|
source "fs/Kconfig"
|
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|
|
source "arch/s390/Kconfig.debug"
|
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|
source "security/Kconfig"
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|
|
source "crypto/Kconfig"
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|
source "lib/Kconfig"
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|
menu "Virtualization"
|
2008-03-05 19:37:14 +08:00
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|
2005-04-17 06:20:36 +08:00
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|
|
config PFAULT
|
2011-01-05 19:47:15 +08:00
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|
|
def_bool y
|
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|
|
|
prompt "Pseudo page fault support"
|
2005-04-17 06:20:36 +08:00
|
|
|
help
|
|
|
|
|
Select this option, if you want to use PFAULT pseudo page fault
|
|
|
|
|
handling under VM. If running native or in LPAR, this option
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|
|
|
has no effect. If your VM does not support PFAULT, PAGEEX
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|
|
pseudo page fault handling will be used.
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|
Note that VM 4.2 supports PFAULT but has a bug in its
|
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|
|
implementation that causes some problems.
|
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|
Everybody who wants to run Linux under VM != VM4.2 should select
|
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|
|
this option.
|
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|
|
config SHARED_KERNEL
|
2012-09-25 20:53:15 +08:00
|
|
|
bool "VM shared kernel support"
|
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|
|
depends on !JUMP_LABEL
|
2005-04-17 06:20:36 +08:00
|
|
|
help
|
|
|
|
|
Select this option, if you want to share the text segment of the
|
|
|
|
|
Linux kernel between different VM guests. This reduces memory
|
|
|
|
|
usage with lots of guests but greatly increases kernel size.
|
2007-03-06 06:35:45 +08:00
|
|
|
Also if a kernel was IPL'ed from a shared segment the kexec system
|
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|
|
call will not work.
|
2005-04-17 06:20:36 +08:00
|
|
|
You should only select this option if you know what you are
|
|
|
|
|
doing and want to exploit this feature.
|
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|
|
|
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|
|
|
config CMM
|
2011-01-05 19:47:15 +08:00
|
|
|
def_tristate n
|
|
|
|
|
prompt "Cooperative memory management"
|
2005-04-17 06:20:36 +08:00
|
|
|
help
|
|
|
|
|
Select this option, if you want to enable the kernel interface
|
|
|
|
|
to reduce the memory size of the system. This is accomplished
|
|
|
|
|
by allocating pages of memory and put them "on hold". This only
|
|
|
|
|
makes sense for a system running under VM where the unused pages
|
|
|
|
|
will be reused by VM for other guest systems. The interface
|
|
|
|
|
allows an external monitor to balance memory of many systems.
|
|
|
|
|
Everybody who wants to run Linux under VM should select this
|
|
|
|
|
option.
|
|
|
|
|
|
|
|
|
|
config CMM_IUCV
|
2011-01-05 19:47:15 +08:00
|
|
|
def_bool y
|
|
|
|
|
prompt "IUCV special message interface to cooperative memory management"
|
2005-04-17 06:20:36 +08:00
|
|
|
depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
|
|
|
|
|
help
|
|
|
|
|
Select this option to enable the special message interface to
|
|
|
|
|
the cooperative memory management.
|
|
|
|
|
|
|
|
|
|
config APPLDATA_BASE
|
2011-01-05 19:47:15 +08:00
|
|
|
def_bool n
|
|
|
|
|
prompt "Linux - VM Monitor Stream, base infrastructure"
|
2008-12-25 20:39:25 +08:00
|
|
|
depends on PROC_FS
|
2005-04-17 06:20:36 +08:00
|
|
|
help
|
|
|
|
|
This provides a kernel interface for creating and updating z/VM APPLDATA
|
|
|
|
|
monitor records. The monitor records are updated at certain time
|
|
|
|
|
intervals, once the timer is started.
|
|
|
|
|
Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
|
|
|
|
|
i.e. enables or disables monitoring on the Linux side.
|
|
|
|
|
A custom interval value (in seconds) can be written to
|
|
|
|
|
/proc/appldata/interval.
|
|
|
|
|
|
|
|
|
|
Defaults are 60 seconds interval and timer off.
|
|
|
|
|
The /proc entries can also be read from, showing the current settings.
|
|
|
|
|
|
|
|
|
|
config APPLDATA_MEM
|
2011-01-05 19:47:15 +08:00
|
|
|
def_tristate m
|
|
|
|
|
prompt "Monitor memory management statistics"
|
2006-12-13 16:34:59 +08:00
|
|
|
depends on APPLDATA_BASE && VM_EVENT_COUNTERS
|
2005-04-17 06:20:36 +08:00
|
|
|
help
|
|
|
|
|
This provides memory management related data to the Linux - VM Monitor
|
|
|
|
|
Stream, like paging/swapping rate, memory utilisation, etc.
|
|
|
|
|
Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
|
|
|
|
|
APPLDATA monitor record, i.e. enables or disables monitoring this record
|
|
|
|
|
on the z/VM side.
|
|
|
|
|
|
|
|
|
|
Default is disabled.
|
|
|
|
|
The /proc entry can also be read from, showing the current settings.
|
|
|
|
|
|
|
|
|
|
This can also be compiled as a module, which will be called
|
|
|
|
|
appldata_mem.o.
|
|
|
|
|
|
|
|
|
|
config APPLDATA_OS
|
2011-01-05 19:47:15 +08:00
|
|
|
def_tristate m
|
|
|
|
|
prompt "Monitor OS statistics"
|
2005-04-17 06:20:36 +08:00
|
|
|
depends on APPLDATA_BASE
|
|
|
|
|
help
|
|
|
|
|
This provides OS related data to the Linux - VM Monitor Stream, like
|
|
|
|
|
CPU utilisation, etc.
|
|
|
|
|
Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
|
|
|
|
|
APPLDATA monitor record, i.e. enables or disables monitoring this record
|
|
|
|
|
on the z/VM side.
|
|
|
|
|
|
|
|
|
|
Default is disabled.
|
|
|
|
|
This can also be compiled as a module, which will be called
|
|
|
|
|
appldata_os.o.
|
|
|
|
|
|
|
|
|
|
config APPLDATA_NET_SUM
|
2011-01-05 19:47:15 +08:00
|
|
|
def_tristate m
|
|
|
|
|
prompt "Monitor overall network statistics"
|
2009-03-26 22:24:00 +08:00
|
|
|
depends on APPLDATA_BASE && NET
|
2005-04-17 06:20:36 +08:00
|
|
|
help
|
|
|
|
|
This provides network related data to the Linux - VM Monitor Stream,
|
|
|
|
|
currently there is only a total sum of network I/O statistics, no
|
|
|
|
|
per-interface data.
|
|
|
|
|
Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
|
|
|
|
|
APPLDATA monitor record, i.e. enables or disables monitoring this record
|
|
|
|
|
on the z/VM side.
|
|
|
|
|
|
|
|
|
|
Default is disabled.
|
|
|
|
|
This can also be compiled as a module, which will be called
|
|
|
|
|
appldata_net_sum.o.
|
|
|
|
|
|
2006-06-23 17:05:06 +08:00
|
|
|
config S390_HYPFS_FS
|
2011-01-05 19:47:15 +08:00
|
|
|
def_bool y
|
|
|
|
|
prompt "s390 hypervisor file system support"
|
2006-06-23 17:05:06 +08:00
|
|
|
select SYS_HYPERVISOR
|
|
|
|
|
help
|
|
|
|
|
This is a virtual file system intended to provide accounting
|
|
|
|
|
information in an s390 hypervisor environment.
|
|
|
|
|
|
2012-08-27 16:55:18 +08:00
|
|
|
source "arch/s390/kvm/Kconfig"
|
2007-04-27 22:01:49 +08:00
|
|
|
|
2008-03-26 01:47:44 +08:00
|
|
|
config S390_GUEST
|
2011-01-05 19:47:15 +08:00
|
|
|
def_bool y
|
2012-10-03 02:16:42 +08:00
|
|
|
prompt "s390 support for virtio devices"
|
2013-07-23 16:26:08 +08:00
|
|
|
select TTY
|
2011-06-22 22:24:07 +08:00
|
|
|
select VIRTUALIZATION
|
2008-03-26 01:47:44 +08:00
|
|
|
select VIRTIO
|
2008-06-20 21:24:18 +08:00
|
|
|
select VIRTIO_CONSOLE
|
2008-03-26 01:47:44 +08:00
|
|
|
help
|
2012-08-27 18:56:48 +08:00
|
|
|
Enabling this option adds support for virtio based paravirtual device
|
|
|
|
|
drivers on s390.
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-08-29 19:30:56 +08:00
|
|
|
Select this option if you want to run the kernel as a guest under
|
2012-08-27 18:56:48 +08:00
|
|
|
the KVM hypervisor.
|
2009-06-16 16:30:52 +08:00
|
|
|
|
2016-07-07 23:07:57 +08:00
|
|
|
config S390_GUEST_OLD_TRANSPORT
|
|
|
|
|
def_bool y
|
|
|
|
|
prompt "Guest support for old s390 virtio transport (DEPRECATED)"
|
|
|
|
|
depends on S390_GUEST
|
|
|
|
|
help
|
|
|
|
|
Enable this option to add support for the old s390-virtio
|
|
|
|
|
transport (i.e. virtio devices NOT based on virtio-ccw). This
|
|
|
|
|
type of virtio devices is only available on the experimental
|
|
|
|
|
kuli userspace or with old (< 2.6) qemu. If you are running
|
|
|
|
|
with a modern version of qemu (which supports virtio-ccw since
|
|
|
|
|
1.4 and uses it by default since version 2.4), you probably won't
|
|
|
|
|
need this.
|
|
|
|
|
|
2009-06-16 16:30:52 +08:00
|
|
|
endmenu
|