tree cc6f6cc79327380d17ad5ebf590d6b1a3bc117cf
parent d0d3cdf4c27fa4ce241616da08138954e02890f7
author Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> 1238077494 +0100
committer Martin Schwidefsky <schwidefsky@de.ibm.com> 1238077471 +0100

[S390] fix dfp elf hwcap/facility bit detection

The old dfp detection wanted to check bit 43 (dfp high performance), but due
to a wrong calculation always used to check bit 42. Additionally the
"userspace expectation" is, that the dfp capability bit is set is if facility
bit 42 (decimal floating point facility available) and bit 44 (perform floating
point operation facility avail).
The patch fixes the bit calculation and extends the check to work like:
  elf hw cap dfp bit = facility bits 42 (dfp) & 44 (pfpo) available

Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>