14 Oct, 2015

1 commit

• 1ec2772e0   s390/diag: add a statistic for diagnose calls ... Browse Code »

  Introduce /sys/debug/kernel/diag_stat with a statistic how many diagnose
  calls have been done by each CPU in the system.

  Signed-off-by: Martin Schwidefsky

  Martin Schwidefsky

  2015-10-14 20:32:06 +0800  

19 Aug, 2015

1 commit

• e619cd3d6   s390/hmcdrv: fix interrupt registration ... Browse Code »

  The z/VM driver sets bit "63-22" in control register zero to one in order
  to enable the CP Service interrupt (0x2603). However the irq subclass mask
  that normally corresponds to the CP Service interrupt is
  "63-54" (== "63-22-32").

  So it looks like the author read the documentation with the 32 bit sized
  cr0 register bit positions (== 22), but didn't realize that bit numbers
  change, if applied to a 64 bit register (== 54) due to the numbering
  scheme.

  Also use irq_subclass_register() instead if ctl_set_bit() since multiple
  services depend on the service signal subclass mask, which is the correct
  bit. This also explains why nobody noticed the bug, since the bit is always
  enabled anyway (e.g. pfault).

  Signed-off-by: Heiko Carstens
  Reviewed-by: Hendrik Brueckner
  Acked-by: Martin Schwidefsky
  Signed-off-by: Martin Schwidefsky

  Heiko Carstens

  2015-08-19 16:40:17 +0800  

25 Sep, 2014

1 commit

• 8f933b104   s390/hmcdrv: HMC drive CD/DVD access ... Browse Code »

  This device driver allows accessing a HMC drive CD/DVD-ROM.
  It can be used in a LPAR and z/VM environment.

  Reviewed-by: Martin Schwidefsky
  Reviewed-by: Heiko Carstens
  Signed-off-by: Ralf Hoppe
  Signed-off-by: Martin Schwidefsky

  Ralf Hoppe

  2014-09-25 16:52:02 +0800