[PATCH v2 0/4] powerpc/xive: add support for H_INT_RESET

[Cédric Le Goater]

Hello,

H_INT_RESET performs a reset of the Hypervisor internal interrupt
structures, removing all settings done with H_INT_SET_SOURCE_CONFIG
and H_INT_SET_QUEUE_CONFIG. This is most important for kdump and kexec
to be able to restart in a clean state.

First patch closes a window in the kexec sequence in which the
H_INT_RESET hcall can be run concurrently with other hcalls when CPUs
are brought down. The other patches wire up the reset hcall making
sure it supports H_LONG_BUSY_* returned by the Hypervisor.

Thanks,

C.

 Changes since v2:

 - replaced msleep() by mdelay() as some calling path are under lock. 

Cédric Le Goater (4):
  powerpc/64/kexec: fix race in kexec when XIVE is shutdown
  powerpc/xive: fix hcall H_INT_RESET to support long busy delays
  powerpc/xive: shutdown XIVE when kexec or kdump is performed
  powerpc/xive: prepare all hcalls to support long busy delays

 arch/powerpc/kernel/machine_kexec_64.c |  8 ++--
 arch/powerpc/platforms/pseries/kexec.c |  7 ++-
 arch/powerpc/sysdev/xive/spapr.c       | 88 +++++++++++++++++++++++++++++-----
 3 files changed, 84 insertions(+), 19 deletions(-)

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2.13.6