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s390: add support for transactional memory

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Allow user-space processes to use transactional execution (TX).
If the TX facility is available user space programs can use
transactions for fine-grained serialization based on the data
objects that are referenced during a transaction. This is
useful for lockless data structures and speculative compiler
optimizations.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky 2012-07-31 11:03:04 +02:00
parent e4b8b3f33f
commit d35339a42d
14 changed files with 151 additions and 21 deletions
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6
arch/s390/kernel/setup.c
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@ -980,6 +980,12 @@ static void __init setup_hwcaps(void)
* HWCAP_S390_HIGH_GPRS is bit 9.
*/
elf_hwcap |= HWCAP_S390_HIGH_GPRS;
/*
* Transactional execution support HWCAP_S390_TE is bit 10.
*/
if (test_facility(50) && test_facility(73))
elf_hwcap |= HWCAP_S390_TE;
#endif
get_cpu_id(&cpu_id);