freebsd-dev/sys/sparc64
Attilio Rao dc6fbf6545 * Completely Remove the option STOP_NMI from the kernel. This option
has proven to have a good effect when entering KDB by using a NMI,
but it completely violates all the good rules about interrupts
disabled while holding a spinlock in other occasions.  This can be the
cause of deadlocks on events where a normal IPI_STOP is expected.
* Adds an new IPI called IPI_STOP_HARD on all the supported architectures.
This IPI is responsible for sending a stop message among CPUs using a
privileged channel when disponible. In other cases it just does match a
normal IPI_STOP.
Right now the IPI_STOP_HARD functionality uses a NMI on ia32 and amd64
architectures, while on the other has a normal IPI_STOP effect. It is
responsibility of maintainers to eventually implement an hard stop
when necessary and possible.
* Use the new IPI facility in order to implement a new userend SMP kernel
function called stop_cpus_hard(). That is specular to stop_cpu() but
it does use the privileged channel for the stopping facility.
* Let KDB use the newly introduced function stop_cpus_hard() and leave
stop_cpus() for all the other cases
* Disable interrupts on CPU0 when starting the process of APs suspension.
* Style cleanup and comments adding

This patch should fix the reboot/shutdown deadlocks many users are
constantly reporting on mailing lists.

Please don't forget to update your config file with the STOP_NMI
option removal

Reviewed by:	jhb
Tested by:	pho, bz, rink
Approved by:	re (kib)
2009-08-13 17:09:45 +00:00
..
central Hook up the generic OFW pnpinfo string method. 2009-03-19 21:14:45 +00:00
compile
conf Implementation of the upcoming Wireless Mesh standard, 802.11s, on the 2009-07-11 15:02:45 +00:00
ebus - Sort device methods. 2009-03-19 20:31:55 +00:00
fhc Hook up the generic OFW pnpinfo string method. 2009-03-19 21:14:45 +00:00
include * Completely Remove the option STOP_NMI from the kernel. This option 2009-08-13 17:09:45 +00:00
isa Add device found in B100. 2009-03-19 20:57:59 +00:00
pci Bring the implementation of the pnpinfo string function more in 2009-03-19 21:12:44 +00:00
sbus Hook up the generic OFW pnpinfo string method. 2009-03-19 21:14:45 +00:00
sparc64 Add a new type of VM object: OBJT_SG. An OBJT_SG object is very similar to 2009-07-24 13:50:29 +00:00