[Xen-devel] [PATCH 0/8] Add support for parsing per CPU Redistributor entry

[Shanker Donthineni <shankerd@xxxxxxxxxxxxxx>]

The current driver doesn't support parsing Redistributor entries that
are described in the MADT GICC table. Not all the GIC implementors
places the Redistributor regions in the always-on power domain. On
systems, the UEFI firmware should describe Redistributor base address
in the associated GIC CPU Interface (GICC) instead of GIC Redistributor
(GICR) table.

The maximum number of mmio handlers and struct vgic_rdist_region
that holds Redistributor addresses are allocated through a static
array with hardcoded size. I don't think this is the right approach
and is not scalable for implementing features like this. I have
decided to convert static to dynamic allocation based on comments
from the below link.

https://patchwork.kernel.org/patch/9163435/

Patches #1, #2 and #3 adds support for parsing not always-on power
domain Redistributor regions.

Patches #4, #5, #6, #7 and #8 refactors the code and allocates the
memory for mmio handlers and vgic_rdist_region based on the number of
Redistributors required for dom0/domU instead of hardcoded values.

This pacthset is created on tip of Julien's branch 
http://xenbits.xen.org/gitweb/?p=people/julieng/xen-unstable.git;a=shortlog;h=refs/heads/irq-routing-acpi-rfc
  
Shanker Donthineni (8):
  arm/gic-v3: Add a separate function for mapping GICD region
  arm/gic-v3: Fold GICR subtable parsing into a new function
  arm/gic-v3: Parse per-cpu redistributor entry in GICC subtable
  xen/arm: vgic: Use dynamic memory allocation for vgic_rdist_region
  arm/gic-v3: Remove an unused macro MAX_RDIST_COUNT
  arm: vgic: Split vgic_domain_init() functionality into two functions
  arm/mmio: Use separate memory allocation for mmio handlers
  arm/vgic: Change fixed number of mmio handlers to variable number

 xen/arch/arm/domain.c             |  12 ++-
 xen/arch/arm/gic-v3.c             | 162 ++++++++++++++++++++++++++++----------
 xen/arch/arm/io.c                 |  14 +++-
 xen/arch/arm/vgic-v2.c            |  16 +++-
 xen/arch/arm/vgic-v3.c            |  65 ++++++++++-----
 xen/arch/arm/vgic.c               |   7 ++
 xen/include/asm-arm/domain.h      |  13 +--
 xen/include/asm-arm/gic.h         |   3 +-
 xen/include/asm-arm/gic_v3_defs.h |   1 +
 xen/include/asm-arm/mmio.h        |   6 +-
 xen/include/asm-arm/vgic.h        |   5 ++
 11 files changed, 226 insertions(+), 78 deletions(-)

-- 
Qualcomm Technologies, Inc. on behalf of Qualcomm Innovation Center, Inc. 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, 
a Linux Foundation Collaborative Project


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