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Linux-Architecture-Reference/LoPAR/sec_rtas_update_nodes.xml

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Collapse 5 subdocs back into a single document. Clean build. Tag work needed. Signed-off-by: Jeff Scheel <scheel@us.ibm.com>
5 years ago
<?xml version="1.0" encoding="UTF-8"?>
<!--
Copyright (c) 2016 OpenPOWER Foundation
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
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<section xmlns="http://docbook.org/ns/docbook"
xmlns:xi="http://www.w3.org/2001/XInclude"
xmlns:xl="http://www.w3.org/1999/xlink"
version="5.0"
xml:lang="en"
xml:id="dbdoclet.50569332_84414">
<title><emphasis>ibm,update-nodes</emphasis> RTAS Call</title>
<para>This RTAS call is used to determine which device tree nodes have
changed due to a massive platform reconfiguration such as when the
partition is migrated between machines. Differing platform
reconfigurations are expected to potentially result in different sets of
nodes being updated; the &#8220;scope&#8221; argument communicates what
set of changes are to be reported. The work area is a 4 KB naturally
aligned area of storage below the first 4 GB; as such, it may not be
large enough to contain the reports of all changed nodes. The status
value of 1 is used to inform the caller that there are more updates to
report and that it will have to call the
<emphasis>ibm,update-nodes</emphasis> RTAS again to receive them. On
subsequent calls the state variable, which is set to zero on the first
call, is set to the value returned on the previous call, to supply RTAS
with the information it needs to continue from where the previous call
ended.</para>
<para>Upon return, the work area contains, in addition to the state
variable, zero or more operation lists, and logically ends with a
terminator (4 byte word naturally aligned containing 0x00000000). An
operation list consists of an operator (4 bytes naturally aligned) and
zero or more (up to a the maximum number of 4 byte locations remaining in
the work area) operands, each 4 bytes long. An operator consists of a
single byte opcode followed by 3 bytes encoded with the binary value of
the number of operands that follow. An operator with an operand length
field of zero performs no operation, and the opcode of zero is reserved
for the terminator -- thus the terminator can be considered a special
encoding of a no-op operator.</para>
<itemizedlist>
<listitem>
<para>The opcode of 0x01 is used for deleted nodes -- the operands are
the
<emphasis role="bold">phandle</emphasis> values for the deleted nodes.</para>
</listitem>
<listitem>
<para>The opcode of 0x02 is used for updated nodes -- the operands are
the
<emphasis role="bold">phandle</emphasis> values for the updated nodes. The updated
properties are obtained using the
<emphasis>ibm,update-properties</emphasis> RTAS call.</para>
</listitem>
<listitem>
<para>The opcode of 0x03 is used for adding nodes -- the operands are
pairs of
<emphasis role="bold">phandle</emphasis> and
<emphasis role="bold">drc-index</emphasis> values; the
<emphasis role="bold">phandle</emphasis> value denotes the parent node of the node to
be added and the
<emphasis role="bold">ibm,drc-index</emphasis> value is passed with the
<emphasis>ibm,configure-connector</emphasis> RTAS call to obtain the
contents of the added node.</para>
</listitem>
</itemizedlist>
<para>To make processing of device tree updates simpler, all opcode 0x01
(delete) operations (if any) are presented prior to all opcode 0x02
(update) operations (if any), and finally any 0x03 (addition) operations
are presented. The
<emphasis role="bold">phandle</emphasis> operand values are the same
<emphasis role="bold">phandle</emphasis> values as reported by the
<emphasis role="bold"><literal>&#8220;ibm,phandle&#8221;</literal></emphasis> property.</para>
<variablelist>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569332_84414"
xrefstyle="select: labelnumber nopage"/>-1.</emphasis></term>
<listitem>
<para><emphasis role="bold">For the Update OF Tree option:</emphasis> The platform must
include the
<emphasis role="bold"><literal>&#8220;ibm,phandle&#8221;</literal></emphasis> property in all OF nodes
specified in
<xref linkend="dbdoclet.50569332_80965" />.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569332_84414"
xrefstyle="select: labelnumber nopage"/>-2.</emphasis></term>
<listitem>
<para><emphasis role="bold">For the Update OF Tree option:</emphasis> The platform must
implement the
<emphasis>ibm,update-nodes</emphasis> RTAS call using the argument call
buffer defined by
<xref linkend="dbdoclet.50569332_55185" />.</para>
<table frame="all" pgwide="1" xml:id="dbdoclet.50569332_55185">
<title>Argument Call Buffer
<emphasis>ibm,update-nodes</emphasis></title>
<tgroup cols="3">
<colspec colname="c1" colwidth="1*" />
<colspec colname="c2" colwidth="2*" />
<colspec colname="c3" colwidth="4*" />
<thead>
<row>
<entry>
<para>
<emphasis role="bold">Parameter Type</emphasis>
</para>
</entry>
<entry>
<para>
<emphasis role="bold">Name</emphasis>
</para>
</entry>
<entry>
<para>
<emphasis role="bold">Values</emphasis>
</para>
</entry>
</row>
</thead>
<tbody>
<row>
<entry morerows="4" valign="middle">
<para>In</para>
</entry>
<entry>
<para>
<emphasis>Token</emphasis>
</para>
</entry>
<entry>
<para>Token for
<emphasis>ibm,update-nodes</emphasis></para>
</entry>
</row>
<row>
<entry>
<para>
<emphasis>Number Inputs</emphasis>
</para>
</entry>
<entry>
<para>2</para>
</entry>
</row>
<row>
<entry>
<para>
<emphasis>Number Outputs</emphasis>
</para>
</entry>
<entry>
<para>1</para>
</entry>
</row>
<row>
<entry>
<para>
<emphasis>Work Area Address</emphasis>
</para>
</entry>
<entry>
<para>32 bit real address of work area</para>
</entry>
</row>
<row>
<entry>
<para>
<emphasis>Scope</emphasis>
</para>
</entry>
<entry>
<para>Values per
<xref linkend="dbdoclet.50569332_80965" />.</para>
</entry>
</row>
<row>
<entry>
<para>Out</para>
</entry>
<entry>
<para>
<emphasis>Status</emphasis>
</para>
</entry>
<entry>
<para>-1: Hardware Error</para>
<para>-2: Busy</para>
<para>-3: Parameter Error (Purpose does not match the current
partition state)</para>
<para>0: Success</para>
<para>1: More nodes updated -- call again</para>
</entry>
</row>
</tbody>
</tgroup>
</table>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569332_84414"
xrefstyle="select: labelnumber nopage"/>-3.</emphasis></term>
<listitem>
<para><emphasis>ibm,update-nodes</emphasis> RTAS call work area must be 4 KB
long aligned on a 4 KB boundary that is accessible with MSR[DR] = 0, else
RTAS may return -3 &#8220;Parameter Error&#8221;.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569332_84414"
xrefstyle="select: labelnumber nopage"/>-4.</emphasis></term>
<listitem>
<para><emphasis>ibm,update-nodes</emphasis> RTAS for a given value of &#8220;
<emphasis>Scope</emphasis>&#8221; must be formatted as specified in
<xref linkend="dbdoclet.50569332_76526" />, else RTAS may return -3
&#8220;Parameter Error&#8221;.</para>
<table frame="all" pgwide="1" xml:id="dbdoclet.50569332_76526">
<title>Initial Format of Work Area for
<emphasis>ibm,update-nodes</emphasis></title>
<tgroup cols="1">
<colspec colname="c1" colwidth="100*" align="center" />
<thead>
<row>
<entry>
<para>0x00000000 (State Variable indicates Initial call for
specified
<emphasis>Scope</emphasis>)</para>
</entry>
</row>
</thead>
<tbody>
<row>
<entry>
<para>12 bytes of 0x00 (reserved)</para>
</entry>
</row>
<row>
<entry>
<para>Don&#8217;t Care . . .</para>
</entry>
</row>
</tbody>
</tgroup>
</table>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569332_84414"
xrefstyle="select: labelnumber nopage"/>-5.</emphasis></term>
<listitem>
<para>Upon successful return (non-negative status
value) from
<emphasis>ibm,update-nodes</emphasis> the work area must by formatted as
defined in
<xref linkend="dbdoclet.50569332_64519" />. (Note each entry in
<xref linkend="dbdoclet.50569332_64519" /> is 4 bytes long.)</para>
<table frame="all" pgwide="1" xml:id="dbdoclet.50569332_64519">
<title>Format of Work Area for
<emphasis>ibm,update-nodes</emphasis></title>
<tgroup cols="1">
<colspec colname="c1" colwidth="100*" align="center" />
<tbody>
<row>
<entry>
<para>State Variable (4 Bytes)</para>
</entry>
</row>
<row>
<entry>
<para>12 bytes of 0x00 (reserved)</para>
</entry>
</row>
<row>
<entry>
<para>0 or more operation lists</para>
</entry>
</row>
<row>
<entry>
<para>. . .</para>
</entry>
</row>
<row>
<entry>
<para>Terminator (0x00000000)</para>
</entry>
</row>
</tbody>
</tgroup>
</table>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569332_84414"
xrefstyle="select: labelnumber nopage"/>-6.</emphasis></term>
<listitem>
<para><emphasis>ibm,update-nodes</emphasis> RTAS call operation list for the
<emphasis>ibm,update-nodes</emphasis> RTAS call must contain an operator
(4 bytes naturally aligned) and zero or more 4 byte operands up to the
end of the work area.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569332_84414"
xrefstyle="select: labelnumber nopage"/>-7.</emphasis></term>
<listitem>
<para>An operator in an
<emphasis>ibm,update-nodes</emphasis> RTAS call operation list must be
formatted with, starting at the high order byte, a single byte opcode
followed by 3 bytes encoded with the binary value of the number of
operands that follow.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569332_84414"
xrefstyle="select: labelnumber nopage"/>-8.</emphasis></term>
<listitem>
<para>An operator in an
<emphasis>ibm,update-nodes</emphasis> RTAS call operation list with an
operand length field of zero must be considered to perform no
operation.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569332_84414"
xrefstyle="select: labelnumber nopage"/>-9.</emphasis></term>
<listitem>
<para>The opcode of 0x01 in an
<emphasis>ibm,update-nodes</emphasis> RTAS call operation list must be
used to denote node deletions.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569332_84414"
xrefstyle="select: labelnumber nopage"/>-10.</emphasis></term>
<listitem>
<para>The operands for opcode 0x01 in an
<emphasis>ibm,update-nodes</emphasis> RTAS call operation list must be the
<emphasis role="bold">phandle</emphasis> values for the deleted nodes.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569332_84414"
xrefstyle="select: labelnumber nopage"/>-11.</emphasis></term>
<listitem>
<para>The opcode of 0x02 in an
<emphasis>ibm,update-nodes</emphasis> RTAS call operation list must be
used to denote updated nodes.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569332_84414"
xrefstyle="select: labelnumber nopage"/>-12.</emphasis></term>
<listitem>
<para>The operands for opcode 0x02 in an
<emphasis>ibm,update-nodes</emphasis> RTAS call operation list must be the
<emphasis role="bold">phandle</emphasis> values for the updated nodes that may be used
as the
<emphasis>ibm,update-properties</emphasis> RTAS call argument to obtain
the changed properties of the updated node.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569332_84414"
xrefstyle="select: labelnumber nopage"/>-13.</emphasis></term>
<listitem>
<para>The opcode of 0x03 in an
<emphasis>ibm,update-nodes</emphasis> RTAS call operation list must used
for the added nodes.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569332_84414"
xrefstyle="select: labelnumber nopage"/>-14.</emphasis></term>
<listitem>
<para>The operands for opcode of 0x03 in an
<emphasis>ibm,update-nodes</emphasis> RTAS call operation list must be
<emphasis role="bold">phandle</emphasis> and
<emphasis role="bold">drc-index</emphasis> value pairs (each value being 4 bytes
on a natural boundary totalling 8 bytes for the pair) denoting the parent
node of the added node and the
<emphasis>ibm,configure-connector</emphasis> RTAS call argument to obtain
the contents of the added node respectively.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569332_84414"
xrefstyle="select: labelnumber nopage"/>-15.</emphasis></term>
<listitem>
<para>All opcode 0x01 (delete) in an
<emphasis>ibm,update-nodes</emphasis> RTAS call operation list (if any)
must be presented prior to any opcode 0x02 (update) operations (if
any).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569332_84414"
xrefstyle="select: labelnumber nopage"/>-16.</emphasis></term>
<listitem>
<para>All opcode 0x02 (update) in an
<emphasis>ibm,update-nodes</emphasis> RTAS call operation list (if any)
must be presented prior to any opcode 0x03 (add) operations (if
any).</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569332_84414"
xrefstyle="select: labelnumber nopage"/>-17.</emphasis></term>
<listitem>
<para>The work area on subsequent call(s) to
<emphasis>ibm,update-nodes</emphasis> RTAS for the same value of the
<emphasis role="bold"><literal>&#8220;Scope&#8221;</literal></emphasis> must be formatted as specified in
<xref linkend="dbdoclet.50569332_64422" />, else RTAS may return -3
&#8220;Parameter Error&#8221;.</para>
<table frame="all" pgwide="1" xml:id="dbdoclet.50569332_64422">
<title>Format of Work Area for Subsequent Calls to
<emphasis>ibm,update-nodes</emphasis></title>
<tgroup cols="1">
<colspec colname="c1" colwidth="100*" align="center" />
<thead>
<row>
<entry>
<para>Value of the 1st 16 bytes of the returned work area from
last call to
<emphasis>ibm,update-nodes</emphasis> RTAS that returned status
of 1.</para>
</entry>
</row>
</thead>
<tbody>
<row>
<entry>
<para>Don&#8217;t Care . . .</para>
</entry>
</row>
</tbody>
</tgroup>
</table>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569332_84414"
xrefstyle="select: labelnumber nopage"/>-18.</emphasis></term>
<listitem>
<para>The &#8220;<emphasis>Scope</emphasis>&#8221; argument for the
<emphasis>ibm,update-nodes</emphasis> RTAS call must be one of the values
specified in the scope value column of
<xref linkend="dbdoclet.50569332_80965" />, else RTAS may return -3
&#8220;Parameter Error&#8221;.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569332_84414"
xrefstyle="select: labelnumber nopage"/>-19.</emphasis></term>
<listitem>
<para>For the
<emphasis>ibm,update-nodes</emphasis> RTAS call, the platform must
restrict its reported node updates to those specified in
<xref linkend="dbdoclet.50569332_80965" /> for the value of the specified
<emphasis role="bold"><literal>&#8220;Scope&#8221;</literal></emphasis> argument.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><emphasis role="bold">R1-<xref linkend="dbdoclet.50569332_84414"
xrefstyle="select: labelnumber nopage"/>-20.</emphasis></term>
<listitem>
<para>The work area on the first call to
<emphasis>ibm,update-nodes</emphasis> RTAS for a given value of
<emphasis>"Scope"</emphasis> must be formatted as specified in
<xref linkend="table_initial_format_of_work_area_for_ibm_update_nodes"/>
else RTAS may return -3 "Parameter Error".</para>
<table frame="all" pgwide="1" xml:id="table_initial_format_of_work_area_for_ibm_update_nodes">
<title>Initial Format of Work Area for
<emphasis>ibm,update-nodes</emphasis> with Device Reconfiguration Scope</title>
<tgroup cols="1">
<colspec colname="c1" colwidth="100*" align="center"/>
<tbody>
<row>
<entry>
<para>0x00000000 (State Variable indicates Initial call for specified <emphasis>Scope</emphasis>)</para>
</entry>
</row>
<row>
<entry>
<para>Unit Address of target device for reconfiguration</para>
</entry>
</row>
<row>
<entry>
<para>4 bytes of 0x00 (reserved)</para>
</entry>
</row>
<row>
<entry>
<para>Don't Care. . .</para>
</entry>
</row>
</tbody>
</tgroup>
</table>
</listitem>
</varlistentry>
</variablelist>
<table frame="all" pgwide="1" xml:id="dbdoclet.50569332_80965">
<title>Nodes That May be Reported by
<emphasis>ibm,update-nodes</emphasis> for a Given Value of the
&#8220;<emphasis>Scope</emphasis>&#8221; Argument</title>
<tgroup cols="3">
<colspec colname="c1" colwidth="33*" />
<colspec colname="c2" colwidth="33*" />
<colspec colname="c3" colwidth="33*" />
<thead>
<row>
<entry>
<para>Scope Value</para>
</entry>
<entry>
<para>Reportable node types (value of
<emphasis role="bold"><literal>&#8220;name&#8221;</literal></emphasis> or
<emphasis role="bold"><literal>&#8220;device_type&#8221;</literal></emphasis> property)</para>
</entry>
<entry>
<para>Supported Opcodes</para>
</entry>
</row>
</thead>
<tbody>
<row>
<entry morerows="7" valign="middle">
<para>Negative values: Platform Resource Reassignment events as
from
<emphasis>event-scan</emphasis> RTAS</para>
</entry>
<entry>
<para><emphasis role="bold">cpu</emphasis></para>
</entry>
<entry>
<para>0x02</para>
</entry>
</row>
<row>
<entry>
<para><emphasis role="bold">memory</emphasis></para>
</entry>
<entry>
<para>0x02</para>
</entry>
</row>
<row>
<entry>
<para><emphasis role="bold">ibm,dynamic-reconfiguration-memory</emphasis></para>
</entry>
<entry>
<para>0x02</para>
</entry>
</row>
<row>
<entry>
<para>
<emphasis role="bold">ibm,plaform-facilities</emphasis>
</para>
</entry>
<entry>
<para>0x01-0x03</para>
</entry>
</row>
<row>
<entry>
<para>
<emphasis role="bold">ibm,random-v#</emphasis>
</para>
</entry>
<entry>
<para>0x01-0x03</para>
</entry>
</row>
<row>
<entry>
<para>
<emphasis role="bold">ibm,compression-v#</emphasis>
</para>
</entry>
<entry>
<para>0x01-0x03</para>
</entry>
</row>
<row>
<entry>
<para>
<emphasis role="bold">ibm,encryption-v#</emphasis>
</para>
</entry>
<entry>
<para>0x01-0x03</para>
</entry>
</row>
<row>
<entry>
<para>
<emphasis role="bold">ibm,memory-utilization_instrumentation-v#</emphasis>
</para>
</entry>
<entry>
<para>0x01-0x03</para>
</entry>
</row>
<row>
<entry morerows="13" valign="middle">
<para>1 Partition Migration / Hibernation</para>
</entry>
<entry>
<para>
<emphasis role="bold">root</emphasis>
</para>
</entry>
<entry>
<para>0x02</para>
</entry>
</row>
<row>
<entry>
<para>
<emphasis role="bold">openprom</emphasis>
</para>
</entry>
<entry>
<para>0x02</para>
</entry>
</row>
<row>
<entry>
<para>
<emphasis role="bold">rtas</emphasis>
</para>
</entry>
<entry>
<para>0x02</para>
</entry>
</row>
<row>
<entry>
<para>
<emphasis role="bold">vdevice</emphasis>
</para>
</entry>
<entry>
<para>0x02</para>
</entry>
</row>
<row>
<entry>
<para>
<emphasis role="bold">cpu</emphasis>
</para>
</entry>
<entry>
<para>0x02</para>
</entry>
</row>
<row>
<entry>
<para>
<emphasis role="bold">cache</emphasis>
</para>
</entry>
<entry>
<para>0x01-0x03</para>
</entry>
</row>
<row>
<entry>
<para>
<emphasis role="bold">options</emphasis>
</para>
</entry>
<entry>
<para>0x02</para>
</entry>
</row>
<row>
<entry>
<para>
<emphasis role="bold">memory</emphasis>
</para>
</entry>
<entry>
<para>0x02</para>
</entry>
</row>
<row>
<entry>
<para><emphasis role="bold">ibm,dynamic-reconfiguration-memory</emphasis></para>
</entry>
<entry>
<para>&lt;all&gt;</para>
</entry>
</row>
<row>
<entry>
<para><emphasis role="bold">ibm,platform-facilities</emphasis></para>
</entry>
<entry>
<para>0x01-0x03</para>
</entry>
</row>
<row>
<entry>
<para>
<emphasis role="bold">ibm,random-v#</emphasis>
</para>
</entry>
<entry>
<para>0x01-0x03</para>
</entry>
</row>
<row>
<entry>
<para>
<emphasis role="bold">ibm,compression-v#</emphasis>
</para>
</entry>
<entry>
<para>0x01-0x03</para>
</entry>
</row>
<row>
<entry>
<para>
<emphasis role="bold">ibm,encryption-v#</emphasis>
</para>
</entry>
<entry>
<para>0x01-0x03</para>
</entry>
</row>
<row>
<entry>
<para>
<emphasis role="bold">ibm,memory-utilization_instrumentation-v#</emphasis>
</para>
</entry>
<entry>
<para>0x01-0x03</para>
</entry>
</row>
<row>
<entry>
<para>2 Activate Firmware</para>
</entry>
<entry>
<para>
<emphasis role="bold">rtas</emphasis>
</para>
</entry>
<entry>
<para>0x02</para>
</entry>
</row>
<row>
<entry morerows="1" valign="middle">
<para>3 Device Reconfiguration</para>
</entry>
<entry>
<para>
<emphasis role="bold">ibm,coherent-platform-facility</emphasis>
</para>
</entry>
<entry>
<para>0x02</para>
</entry>
</row>
<row>
<entry>
<para>
<emphasis role="bold">ibm,coherent-platform-function</emphasis>
</para>
</entry>
<entry>
<para>0x02</para>
</entry>
</row>
</tbody>
</tgroup>
</table>
</section>