[PATCH v2 00/15] xen/arm: Bug fixes for the vGIC

[Julien Grall <julien.grall@linaro.org>]

Hello,

The first goal of this series is to fix Linux 3.19 DOM0 boot on GICv3 systems
(see patch #1).

It turns out to a bigger series because there were some outstanding bugs in the
vGIC emulation. The most important one is the way we emulate the re-distributor.
Each re-distributor should be associated to a single processor and have it's
own range (see patch #8).

The breakdown of this series is:
    * #1 - #8: vGICv3 fixes
    * #9: vGICv3 log improvement
    * #10 - #13: vGICv2 fixes
    * #14: Drop unused fields
    * #15: GICv3 doc improvement

Most of this patches should be backported to Xen 4.5/Xen 4.5 (see each patch).
Although, the one in GICv2 are not critical.

Changes since v2:
    - 2 patches of the series turn into an XSA 118 [1]
    - Correctly implement the re-distributor
    - Drop the documentation patch as I succedeed to quickly implement the
    re-distributor emulation
    - Replace " Don't check the size when we ignore the write/read as
    zero" patches by a new version to handle correctly RAZ/WI registers
    - Bunch of new patch to fix registers emulation

For each changes see in each patch.

This series depends on XSA 118 [1] which has not been commited yet.

Sincerely yours,

[1] http://xenbits.xen.org/xsa/advisory-118.html


Julien Grall (15):
  xen/arm: vgic-v3: Correctly set GICD_TYPER.IDbits
  xen/arm: vgic-v3: Correctly set GICD_TYPER.CPUNumber
  xen/arm: vgic-v3: Correctly handle GICD_CTLR
  xen/arm: vgic-v3: Correctly handle RAZ/WI registers
  xen/arm: vgic-v3: Correctly implement read into GICR_NSACR
  xen/arm: vgic-v3: Set stride during domain initialization
  xen/arm: vgic-v3: Use a struct to describe contiguous rdist regions
  xen/arm: vgic-v3: Emulate correctly the re-distributor
  xen/arm: vgic-v3: Clarify which distributor is used in the common
    emulation
  xen/arm: vgic-v2: Correctly set GICD_TYPER.CPUNumber
  xen/arm: vgic-v2: Correctly handle RAZ/WI registers
  xen/arm: vgic-v2: Take the lock when writing into GICD_CTLR
  xen/arm: vgic-v2: GICD_I{S,C}PENDR* are only word-accessible
  xen/arm: vgic: Drop iactive, ipend, pendsgi field
  xen/arm: gic-v3: Update some comments in the code

 xen/arch/arm/gic-v3.c             |  44 ++--
 xen/arch/arm/vgic-v2.c            | 112 ++++------
 xen/arch/arm/vgic-v3.c            | 424 +++++++++++++++++++++++---------------
 xen/include/asm-arm/domain.h      |  17 +-
 xen/include/asm-arm/gic.h         |   1 +
 xen/include/asm-arm/gic_v3_defs.h |   3 +
 xen/include/asm-arm/vgic.h        |   2 +-
 7 files changed, 345 insertions(+), 258 deletions(-)

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2.1.4