diff options
author | Bharata B Rao <bharata@linux.vnet.ibm.com> | 2015-07-02 16:23:15 +1000 |
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committer | Alexander Graf <agraf@suse.de> | 2015-07-07 17:44:51 +0200 |
commit | db4ef288f4a6d285b39dc8ac477092d76971a300 (patch) | |
tree | 30935beaab5fbca18a62162d20bf2f16e33ae393 /docs/specs/ppc-spapr-hotplug.txt | |
parent | 9e734e3deefd460188ea9bd107b65a528ccb7255 (diff) |
spapr: Support ibm, lrdr-capacity device tree property
Add support for ibm,lrdr-capacity since this is needed by the guest
kernel to know about the possible hot-pluggable CPUs and Memory. With
this, pseries kernels will start reporting correct maxcpus in
/sys/devices/system/cpu/possible.
Also define the minimum hotpluggable memory size as 256MB.
Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
[agraf: Fix compile error on 32bit hosts]
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'docs/specs/ppc-spapr-hotplug.txt')
-rw-r--r-- | docs/specs/ppc-spapr-hotplug.txt | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/docs/specs/ppc-spapr-hotplug.txt b/docs/specs/ppc-spapr-hotplug.txt index d35771cc2b..46e07196bb 100644 --- a/docs/specs/ppc-spapr-hotplug.txt +++ b/docs/specs/ppc-spapr-hotplug.txt @@ -284,4 +284,22 @@ struct rtas_event_log_v6_hp { } drc; } QEMU_PACKED; +== ibm,lrdr-capacity == + +ibm,lrdr-capacity is a property in the /rtas device tree node that identifies +the dynamic reconfiguration capabilities of the guest. It consists of a triple +consisting of <phys>, <size> and <maxcpus>. + + <phys>, encoded in BE format represents the maximum address in bytes and + hence the maximum memory that can be allocated to the guest. + + <size>, encoded in BE format represents the size increments in which + memory can be hot-plugged to the guest. + + <maxcpus>, a BE-encoded integer, represents the maximum number of + processors that the guest can have. + +pseries guests use this property to note the maximum allowed CPUs for the +guest. + [1] http://thread.gmane.org/gmane.linux.ports.ppc.embedded/75350/focus=106867 |