linux_dsm_epyc7002/arch/powerpc/platforms
Nicholas Piggin 461e96a337 powerpc/pasemi: Do not process external or decrementer interrupts from sreset
PA Semi will wake from low power state at the system reset interrupt,
with the event encoded in SRR1, rather than waking at the interrupt
vector that corresponds to that event.

The system reset handler for this platform decodes SRR1 event reason
and calls the interrupt handler to process it directly from the system
reset handlre.

A subsequent change will treat the system reset interrupt as a Linux NMI
with its own per-CPU stack, and this will no longer work. Remove the
external and decrementer handlers from the system reset handler.

- The external exception remains raised and will fire again at the
  EE interrupt vector when system reset returns.

- The decrementer is set to 1 so it will be raised again and fire when
  the system reset returns.

It is possible to branch to an idle handler from the system reset
interrupt (like POWER does), then restore a normal stack and restore
this optimisation. But simplicity wins for now.

Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-04-28 21:02:25 +10:00
..
8xx powerpc/8xx: Implement support of hugepages 2016-12-09 22:49:07 -06:00
40x powerpc updates for 4.10 2016-12-16 09:26:42 -08:00
44x powerpc/4xx: Make sam440ep_setup_rtc() init 2017-03-31 23:09:40 +11:00
52xx powerpc: Remove all usages of NO_IRQ 2016-09-20 20:57:12 +10:00
82xx powerpc/e8248e: Select PHYLIB only if NETDEVICES is enabled 2016-09-24 23:59:47 -05:00
83xx sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
85xx powerpc: Change the doorbell IPI calling convention 2017-04-13 23:34:33 +10:00
86xx powerpc: Convert fsl_rstcr_restart to a reset handler 2016-09-25 02:38:50 -05:00
512x powerpc: Remove all usages of NO_IRQ 2016-09-20 20:57:12 +10:00
amigaone powerpc: Move 32-bit probe() machine to later in the boot process 2016-07-21 19:06:42 +10:00
cell powerpc: Create asm/debugfs.h and move powerpc_debugfs_root there 2017-04-11 07:46:03 +10:00
chrp Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
embedded6xx powerpc: Add support for relative exception tables 2016-11-14 11:11:51 +11:00
maple powerpc: Move isa bridge definitions to separate include 2017-01-31 13:54:17 +11:00
pasemi powerpc/pasemi: Do not process external or decrementer interrupts from sreset 2017-04-28 21:02:25 +10:00
powermac powerpc: Change the doorbell IPI calling convention 2017-04-13 23:34:33 +10:00
powernv Merge branch 'topic/ppc-kvm' into next 2017-04-28 20:19:37 +10:00
ps3 treewide: Move dma_ops from struct dev_archdata into struct device 2017-01-24 12:23:35 -05:00
pseries Merge branch 'topic/ppc-kvm' into next 2017-04-28 20:19:37 +10:00
fsl_uli1575.c of/irq: Refactor interrupt-map parsing 2013-10-24 11:43:04 +01:00
Kconfig powerpc/pseries: Move ibmebus.c into platforms pseries 2016-11-18 23:02:18 +11:00
Kconfig.cputype powerpc/64s: Remove ICSWX feature from Power9 2017-04-19 20:21:50 +10:00
Makefile powerpc: Remove platforms/wsp and associated pieces 2014-06-11 16:35:38 +10:00