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s390/facilities: remove transactional-execution bits

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Remove the two facility bits

50 - constrained transactional-execution facility
74 - transactional-execution facility

from the required facilities if the kernel is built with -march=zEC12.

E.g. z/VM 6.3 doesn't virtualize the TX facility yet. Therefore a kernel
built with -march=zEC12 and ipl'ed on a zEC12 machine as a z/VM 6.3 guest
will emit a message about the missing facilities and stop working.

The kernel however doesn't make use of the TX facility, therefore remove
the two TX related facility bits and fix this unpleasant behavior.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2015-08-13 12:27:16 +02:00 committed by Martin Schwidefsky
parent c0e5ddab6e
commit a69db2f6ad
1 changed files with 2 additions and 2 deletions
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4
arch/s390/kernel/head.S
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@ -414,9 +414,9 @@ ENTRY(startup_kdump)
# followed by the facility words.
#if defined(CONFIG_MARCH_Z13)
.long 3, 0xc100eff2, 0xf46ce800, 0x00400000
.long 2, 0xc100eff2, 0xf46cc800
#elif defined(CONFIG_MARCH_ZEC12)
.long 3, 0xc100eff2, 0xf46ce800, 0x00400000
.long 2, 0xc100eff2, 0xf46cc800
#elif defined(CONFIG_MARCH_Z196)
.long 2, 0xc100eff2, 0xf46c0000
#elif defined(CONFIG_MARCH_Z10)