linux-kernel - [RFC 0/3] powerpc/pseries: Remap hw to kernel cpu indexes

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Date:   Tue, 11 Dec 2018 16:03:31 -0600
From:   Michael Bringmann <mwb@...ux.vnet.ibm.com>
To:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org
Cc:     Michael Ellerman <mpe@...erman.id.au>,
        Tyrel Datwyler <tyreld@...ux.vnet.ibm.com>,
        Thomas Falcon <tlfalcon@...ux.vnet.ibm.com>,
        Juliet Kim <minkim@...ibm.com>,
        Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
        Vaidyanathan Srinivasan <svaidyan@...ibm.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Nicholas Piggin <npiggin@...il.com>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>,
        Rob Herring <robh@...nel.org>,
        Guenter Roeck <linux@...ck-us.net>, mwb@...ux.vnet.ibm.com,
        tlfalcon@...ux.vnet.ibm.com, tyreld@...ux.vnet.ibm.com,
        minkim@...ibm.com
Subject: [RFC 0/3] powerpc/pseries: Remap hw to kernel cpu indexes

Define and apply new interface to map hardware-specific powerpc cpu
ids to a kernel specific range of cpu values.  Mapping is intended
to prevent confusion within the kernel about the cpu+node mapping,
and the changes in configuration that may happen due to powerpc LPAR
migration or other associativity changes during the lifetime of a
system.  These interfaces exchange the thread_index provided by the
'ibm,ppc-interrupt-server#s' properties, for an internal index to
be used by kernel scheduling interfaces.

Signed-off-by: Michael Bringmann <mwb@...ux.vnet.ibm.com>

Michael Bringmann (3):
  powerpc/numa: Conditionally online new nodes
  powerpc/numa: Define mapping between HW and kernel cpus
  powerpc/numa: Apply mapping between HW and kernel cpu