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[Xen-devel] [RFC PATCH v1 00/21] ARM: Add Xen NUMA support

From: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxx>

With this RFC patch series, NUMA support is added for arm platform.
Both DT and ACPI based NUMA support is added.
Only Xen is made aware of NUMA platform. Dom0 is awareness is not

As part of this series, the code under x86 architecture is
reused by moving into common files.
New files xen/common/numa.c and xen/commom/srat.c files are
added which are common for both x86 and arm.

Patches 1 - 12 & 20 are for DT NUMA and 13 - 19 & 21 are for

DT NUMA: The following major changes are performed
 - Dropped numa-node-id information from Dom0 DT.
   So that Dom0 devices make allocation from node 0 for
   devmalloc requests.
 - Memory DT is not deleted by EFI. It is exposed to Xen
   to extract numa information.
 - On NUMA failure, Fallback to Non-NUMA booting.
   Assuming all the memory and CPU's are under node 0.
 - CONFIG_NUMA is introduced.

 - MADT is parsed before parsing SRAT table to extract
   CPU_ID to MPIDR mapping info. In Linux, while parsing SRAT
   table, MADT table is opened and extract MPIDR. However this
   approach is not working on Xen it allows only one table to
   be open at a time because when ACPI table is opened, Xen
   maps to single region. So opening ACPI tables recursively
   leads to overwriting of contents.
 - SRAT table is parsed for ACPI_SRAT_TYPE_GICC_AFFINITY to extract
   proximity info and MPIDR from CPU_ID to MPIDR mapping table.
 - SRAT table is parsed for ACPI_SRAT_TYPE_MEMORY_AFFINITY to extract
   memory proximity.
 - Re-use SLIT parsing of x86 for node distance information.
 - CONFIG_ACPI_NUMA is introduced

The node_distance() API is implemented separately for x86 and arm
as arm has DT and ACPI based distance information.

No changes are made to x86 implementation only code is refactored.
Hence only compilation tested for x86.

Code is shared at https://github.com/vijaykilari/xen-numa rfc_1

Note: Please use this patch series only for review.
For testing, patch to boot allocator is required. Which will
be sent outside this series.

Vijaya Kumar K (21):
  ARM: NUMA: Add existing ARM numa code under CONFIG_NUMA
  x86: NUMA: Refactor NUMA code
  NUMA: Move arch specific NUMA code as common
  NUMA: Refactor generic and arch specific code of numa_setup
  ARM: efi: Do not delete memory node from fdt
  ARM: NUMA: Parse CPU NUMA information
  ARM: NUMA: Parse memory NUMA information
  ARM: NUMA: Parse NUMA distance information
  ARM: NUMA: Add CPU NUMA support
  ARM: NUMA: Add memory NUMA support
  ARM: NUMA: Add fallback on NUMA failure
  ARM: NUMA: Do not expose numa info to DOM0
  ACPI: Refactor acpi SRAT and SLIT table handling code
  ACPI: Move srat_disabled to common code
  ARM: NUMA: Extract MPIDR from MADT table
  ARM: NUMA: Extract proximity from SRAT table
  ARM: NUMA: Extract memory proximity from SRAT table
  ARM: NUMA: update node_distance with ACPI support
  ARM: NUMA: Initialize ACPI NUMA
  ARM: NUMA: Enable CONFIG_NUMA config

 xen/arch/arm/Kconfig                |   5 +
 xen/arch/arm/Makefile               |   3 +
 xen/arch/arm/acpi_numa.c            | 257 +++++++++++++++++++++
 xen/arch/arm/bootfdt.c              |  21 +-
 xen/arch/arm/domain_build.c         |   9 +
 xen/arch/arm/dt_numa.c              | 244 ++++++++++++++++++++
 xen/arch/arm/efi/efi-boot.h         |  25 --
 xen/arch/arm/numa.c                 | 249 ++++++++++++++++++++
 xen/arch/arm/setup.c                |   5 +
 xen/arch/arm/smpboot.c              |   3 +
 xen/arch/x86/domain_build.c         |   1 +
 xen/arch/x86/numa.c                 | 318 +-------------------------
 xen/arch/x86/physdev.c              |   1 +
 xen/arch/x86/setup.c                |   1 +
 xen/arch/x86/smpboot.c              |   1 +
 xen/arch/x86/srat.c                 | 183 +--------------
 xen/arch/x86/x86_64/mm.c            |   1 +
 xen/common/Makefile                 |   2 +
 xen/common/numa.c                   | 439 ++++++++++++++++++++++++++++++++++++
 xen/common/srat.c                   | 157 +++++++++++++
 xen/drivers/acpi/numa.c             |  37 +++
 xen/drivers/acpi/osl.c              |   2 +
 xen/drivers/passthrough/vtd/iommu.c |   1 +
 xen/include/acpi/actbl1.h           |  17 +-
 xen/include/asm-arm/acpi.h          |   2 +
 xen/include/asm-arm/numa.h          |  41 ++++
 xen/include/asm-x86/acpi.h          |   2 -
 xen/include/asm-x86/numa.h          |  53 +----
 xen/include/xen/acpi.h              |  39 ++++
 xen/include/xen/device_tree.h       |   7 +
 xen/include/xen/numa.h              |  61 ++++-
 xen/include/xen/srat.h              |  15 ++
 32 files changed, 1620 insertions(+), 582 deletions(-)
 create mode 100644 xen/arch/arm/acpi_numa.c
 create mode 100644 xen/arch/arm/dt_numa.c
 create mode 100644 xen/arch/arm/numa.c
 create mode 100644 xen/common/numa.c
 create mode 100644 xen/common/srat.c
 create mode 100644 xen/include/xen/srat.h


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