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authorDavid Gibson <david@gibson.dropbear.id.au>2011-04-01 15:15:23 +1100
committerAlexander Graf <agraf@suse.de>2011-04-01 18:34:56 +0200
commit39ac8455106af1ed669b8e10223420cf1ac5b190 (patch)
tree48c935a56286ff50f76982c9d7aab1a0eb835e03 /block-migration.c
parentf43e35255cffb6ac6230dd09d308f7909f823f96 (diff)
Implement hcall based RTAS for pSeries machines
On pSeries machines, operating systems can instantiate "RTAS" (Run-Time Abstraction Services), a runtime component of the firmware which implements a number of low-level, infrequently used operations. On logical partitions under a hypervisor, many of the RTAS functions require hypervisor privilege. For simplicity, therefore, hypervisor systems typically implement the in-partition RTAS as just a tiny wrapper around a hypercall which actually implements the various RTAS functions. This patch implements such a hypercall based RTAS for our emulated pSeries machine. A tiny in-partition "firmware" calls a new hypercall, which looks up available RTAS services in a table. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
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