[Xen-devel] [PATCH v3 0/2] Fix Xen boot on XGene

[Stefano Stabellini <stefano@xxxxxxxxxxx>]

Hi all,

the following commit:

commit 21550029f709072aacf3b90edd574e7d3021b400
Author: Julien Grall <julien.grall@xxxxxxxxxx>
Date:   Thu Oct 8 19:23:53 2015 +0100

    xen/arm: gic-v2: Automatically detect aliased GIC400


removed PLATFORM_QUIRK_GIC_64K_STRIDE and introduced an heuristic to
check whether the two GICC pages have a 64K stride. However the
heuristic needs device tree to report a GICC region size of 128K to work
properly. That is not the case for some versions of XGene (including the
one I am using, kindly provided by CloudLab.us).

The patch series fixes the issue by reintroducing platform quirks,
PLATFORM_QUIRK_GIC_64K_STRIDE, and forcing GICC size to 128K if
PLATFORM_QUIRK_GIC_64K_STRIDE.

We should consider this series for 4.8. 


Changes in v3:
- add a warning when enabling the quirk
- update comment to match the new behavior of the quirk

Changes in v2:
- only set csize to SZ_128K if it is initially SZ_4K
- set vsize to match
- add warning if gicc is SZ_128K and not aliased


Stefano Stabellini (2):
      Revert "xen/arm: platform: Drop the quirks callback"
      Partially revert 21550029f709072aacf3b90edd574e7d3021b400

 xen/arch/arm/gic-v2.c                | 12 ++++++++++--
 xen/arch/arm/platform.c              | 10 ++++++++++
 xen/arch/arm/platforms/xgene-storm.c |  6 ++++++
 xen/include/asm-arm/platform.h       | 14 ++++++++++++++
 4 files changed, 40 insertions(+), 2 deletions(-)

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