[v1,0/2] xen/arm: Enlarge identity map space

Message

Leo Yan Aug. 31, 2023, 11:01 a.m. UTC

The latest Xen fails to boot on ADLink AVA platform.  Alexey Klimov root
caused the issue is related with the commit 1c78d76b67 ("xen/arm64: mm:
Introduce helpers to prepare/enable/disable").

This is because on ADLink AVA platform, it loads Xen hypervisor to the
address above 2TB and hence causes Xen panic:

  (XEN) MODULE[0]: 00000807f6df0000 - 00000807f6f3e000 Xen
  (XEN) MODULE[1]: 00000807f8054000 - 00000807f8056000 Device Tree
  (XEN) MODULE[2]: 00000000fa834000 - 00000000fc5de1d5 Ramdisk
  (XEN) MODULE[3]: 00000000fc5df000 - 00000000ffb3f810 Kernel

To fix this issue, this series is to enlarge identity map space to
127 TiB and tested on ADLink AVA platform.

Note, we tested on two ADLind AVA platforms, one machine has this issue
and another machine cannot reproduce the panic.  It's likely they have
different firmware versions so one machine loads Xen hypervisor into the
high memory address and caused booting failure.


Leo Yan (2):
  xen/arm: Add macro XEN_VM_MAPPING
  xen/arm: Enlarge identity map space to 127TiB

 xen/arch/arm/include/asm/config.h | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)