Merge remote-tracking branch 'remotes/dgibson/tags/spapr-next-20150923' into staging

sPAPR Patch Queue: 2015-09-23

Highlights:
    * pseries-2.5 machine type
    * Memory hotplug for "pseries" guests
    * Fixes to the PAPR Dynamic Reconfiguration hotplug code
    * Several PAPR compliance fixes
    * New SLOF with:
        * GPT support
        * Much faster VGA handling

# gpg: Signature made Wed 23 Sep 2015 02:50:10 BST using DSA key ID FDDA6FC6
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: F730 2185 38B4 D13E FD80  34F2 6882 CAC6 FDDA 6FC6

* remotes/dgibson/tags/spapr-next-20150923: (36 commits)
  sPAPR: Enable EEH on VFIO PCI device only
  sPAPR: Revert don't enable EEH on emulated PCI devices
  ppc/spapr: Implement H_RANDOM hypercall in QEMU
  ppc/spapr: Fix buffer overflow in spapr_populate_drconf_memory()
  spapr: Fix default NUMA node allocation for threads
  spapr: Move memory hotplug to RTAS_LOG_V6_HP_ID_DRC_COUNT type
  spapr: Support hotplug by specifying DRC count
  spapr: Revert to memory@XXXX representation for non-hotplugged memory
  spapr: Populate ibm,associativity-lookup-arrays correctly for non-NUMA
  spapr: Provide better error message when slots exceed max allowed
  spapr: Don't allow memory hotplug to memory less nodes
  spapr: Memory hotplug support
  spapr: Make hash table size a factor of maxram_size
  spapr: Support ibm,dynamic-reconfiguration-memory
  spapr: Add LMB DR connectors
  spapr: Use QEMU limit for maximum CPUs number
  spapr: Don't use QOM [*] syntax for DR connectors.
  spapr_drc: use RTAS return codes for methods called by RTAS
  spapr: Initialize hotplug memory address space
  spapr_drc: don't allow 'empty' DRCs to be unisolated or allocated
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 48 insertions, 0 deletions

diff --git a/docs/specs/ppc-spapr-hotplug.txt b/docs/specs/ppc-spapr-hotplug.txt
index 46e07196bb..631b0cadae 100644
--- a/docs/specs/ppc-spapr-hotplug.txt
+++ b/docs/specs/ppc-spapr-hotplug.txt
@@ -302,4 +302,52 @@ consisting of <phys>, <size> and <maxcpus>.
 pseries guests use this property to note the maximum allowed CPUs for the
 guest.
 
+== ibm,dynamic-reconfiguration-memory ==
+
+ibm,dynamic-reconfiguration-memory is a device tree node that represents
+dynamically reconfigurable logical memory blocks (LMB). This node
+is generated only when the guest advertises the support for it via
+ibm,client-architecture-support call. Memory that is not dynamically
+reconfigurable is represented by /memory nodes. The properties of this
+node that are of interest to the sPAPR memory hotplug implementation
+in QEMU are described here.
+
+ibm,lmb-size
+
+This 64bit integer defines the size of each dynamically reconfigurable LMB.
+
+ibm,associativity-lookup-arrays
+
+This property defines a lookup array in which the NUMA associativity
+information for each LMB can be found. It is a property encoded array
+that begins with an integer M, the number of associativity lists followed
+by an integer N, the number of entries per associativity list and terminated
+by M associativity lists each of length N integers.
+
+This property provides the same information as given by ibm,associativity
+property in a /memory node. Each assigned LMB has an index value between
+0 and M-1 which is used as an index into this table to select which
+associativity list to use for the LMB. This index value for each LMB
+is defined in ibm,dynamic-memory property.
+
+ibm,dynamic-memory
+
+This property describes the dynamically reconfigurable memory. It is a
+property encoded array that has an integer N, the number of LMBs followed
+by N LMB list entires.
+
+Each LMB list entry consists of the following elements:
+
+- Logical address of the start of the LMB encoded as a 64bit integer. This
+  corresponds to reg property in /memory node.
+- DRC index of the LMB that corresponds to ibm,my-drc-index property
+  in a /memory node.
+- Four bytes reserved for expansion.
+- Associativity list index for the LMB that is used as an index into
+  ibm,associativity-lookup-arrays property described earlier. This
+  is used to retrieve the right associativity list to be used for this
+  LMB.
+- A 32bit flags word. The bit at bit position 0x00000008 defines whether
+  the LMB is assigned to the the partition as of boot time.
+
 [1] http://thread.gmane.org/gmane.linux.ports.ppc.embedded/75350/focus=106867