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authorDavid Gibson <david@gibson.dropbear.id.au>2012-09-12 16:57:10 +0000
committerAlexander Graf <agraf@suse.de>2012-10-04 15:54:17 +0200
commit048706d971c1830d7813052ca027ae00c519e894 (patch)
tree91d7621cd23e218b4cac4f44080d983b1ddec5b8 /net.h
parentf1af19d767073a0926ce12c19b1f06c4933bca35 (diff)
pseries: Fix and cleanup CPU initialization and reset
The current pseries machine init function iterates over the CPUs at several points, doing various bits of initialization. This is messy; these can and should be merged into a single iteration doing all the necessary per cpu initialization. Worse, some of these initializations were setting up state which should be set on every reset, not just at machine init time. A few of the initializations simply weren't necessary at all. This patch, therefore, moves those things that need to be to the per-cpu reset handler, and combines the remainder into two loops over the cpus (which also creates them). The second loop is for setting up hash table information, and will be removed in a subsequent patch also making other fixes to the hash table setup. This exposes a bug in our start-cpu RTAS routine (called by the guest to start up CPUs other than CPU0) under kvm. Previously, this function did not make a call to ensure that it's changes to the new cpu's state were pushed into KVM in-kernel state. We sort-of got away with this because some of the initializations had already placed the secondary CPUs into the right starting state for the sorts of Linux guests we've been running. Nonetheless the start-cpu RTAS call's behaviour was not correct and could easily have been broken by guest changes. This patch also fixes it. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Alexander Graf <agraf@suse.de>
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