diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-22 18:15:32 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-22 18:15:32 -0700 |
commit | db1417967959569599da2a4bd0ffb93b17ad795f (patch) | |
tree | 08751414d5f4a9e264af924154ed3543a8e573a9 /arch/s390/include/asm/system.h | |
parent | 48aab2f79dfc1357c48ce22ff5c989b52a590069 (diff) | |
parent | c6da39f26cfe475704ec521723192e520e8f51b8 (diff) |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 patches from Martin Schwidefsky:
"The biggest patch is the rework of the smp code, something I wanted to
do for some time. There are some patches for our various dump methods
and one new thing: z/VM LGR detection. LGR stands for linux-guest-
relocation and is the guest migration feature of z/VM. For debugging
purposes we keep a log of the systems where a specific guest has lived."
Fix up trivial conflict in arch/s390/kernel/smp.c due to the scheduler
cleanup having removed some code next to removed s390 code.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
[S390] kernel: Pass correct stack for smp_call_ipl_cpu()
[S390] Ensure that vmcore_info pointer is never accessed directly
[S390] dasd: prevent validate server for offline devices
[S390] Remove monolithic build option for zcrypt driver.
[S390] stack dump: fix indentation in output
[S390] kernel: Add OS info memory interface
[S390] Use block_sigmask()
[S390] kernel: Add z/VM LGR detection
[S390] irq: external interrupt code passing
[S390] irq: set __ARCH_IRQ_EXIT_IRQS_DISABLED
[S390] zfcpdump: Implement async sdias event processing
[S390] Use copy_to_absolute_zero() instead of "stura/sturg"
[S390] rework idle code
[S390] rework smp code
[S390] rename lowcore field
[S390] Fix gcc 4.6.0 compile warning
Diffstat (limited to 'arch/s390/include/asm/system.h')
-rw-r--r-- | arch/s390/include/asm/system.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/s390/include/asm/system.h b/arch/s390/include/asm/system.h index d73cc6b60000..2e0bb7f0f9b2 100644 --- a/arch/s390/include/asm/system.h +++ b/arch/s390/include/asm/system.h @@ -7,8 +7,10 @@ #ifndef __ASM_SYSTEM_H #define __ASM_SYSTEM_H +#include <linux/preempt.h> #include <linux/kernel.h> #include <linux/errno.h> +#include <linux/string.h> #include <asm/types.h> #include <asm/ptrace.h> #include <asm/setup.h> @@ -248,6 +250,38 @@ static inline int test_facility(unsigned long nr) return (*ptr & (0x80 >> (nr & 7))) != 0; } +/** + * stfle - Store facility list extended + * @stfle_fac_list: array where facility list can be stored + * @size: size of passed in array in double words + */ +static inline void stfle(u64 *stfle_fac_list, int size) +{ + unsigned long nr; + + preempt_disable(); + S390_lowcore.stfl_fac_list = 0; + asm volatile( + " .insn s,0xb2b10000,0(0)\n" /* stfl */ + "0:\n" + EX_TABLE(0b, 0b) + : "=m" (S390_lowcore.stfl_fac_list)); + nr = 4; /* bytes stored by stfl */ + memcpy(stfle_fac_list, &S390_lowcore.stfl_fac_list, 4); + if (S390_lowcore.stfl_fac_list & 0x01000000) { + /* More facility bits available with stfle */ + register unsigned long reg0 asm("0") = size - 1; + + asm volatile(".insn s,0xb2b00000,0(%1)" /* stfle */ + : "+d" (reg0) + : "a" (stfle_fac_list) + : "memory", "cc"); + nr = (reg0 + 1) * 8; /* # bytes stored by stfle */ + } + memset((char *) stfle_fac_list + nr, 0, size * 8 - nr); + preempt_enable(); +} + static inline unsigned short stap(void) { unsigned short cpu_address; |