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[Xen-devel] [RFC 0/4] Support more than 8 vcpus on arm64 with GICv3

From: Chen Baozi <baozich@xxxxxxxxx>

Currently the number of vcpus on arm64 with GICv3 is limited up to 8 due
to the fixed size of redistributor mmio region. In this patch series, I
postpone setting the size of GICR0 to the point when max_vcpus of a domU is
determined to support more than 8 redistributors.

However, I am not quite sure that decoupling the rdist base and size
setting of domU to different functions is appropriate, though I am now
able to create both a dom0 and a domU of 8+ vcpus with these patches.
So any comments/suggestions are welcomed.

These patches are written based upon Julien's "GICv2 on GICv3" series.

Chen Baozi (4):
  xen/arm64: Map the redistributor region by max_vcpus of domU
  xen/arm64: increase MAX_VIRT_CPUS to 128 on arm64
  tools/libxl: Make DT node of GICv3 according to max_vcpus
  xen/arm: Remove unnecessary GUEST_GICV3_GICR0_SIZE macro.

 tools/libxl/libxl_arm.c       |  6 +++---
 xen/arch/arm/vgic-v3.c        | 27 +++++++++++++++++++--------
 xen/common/domctl.c           | 10 ++++++++++
 xen/include/asm-arm/config.h  |  4 ++++
 xen/include/asm-arm/vgic.h    |  3 +++
 xen/include/public/arch-arm.h |  3 +--
 6 files changed, 40 insertions(+), 13 deletions(-)


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