[Xen-devel] [PATCH v2 0/6] xen/arm: Simplify do_trap_*_abort_guest

[Julien Grall <julien.grall@xxxxxxx>]

Hello all,

The current data/instruction abort paths contain unnecessary code and
translate to often a VA to a IPA. This series aim to simplify this path.

Now that the register HPFAR_EL2 is read in some case that can be affected
by the erratum 834220 on Cortex-A57, we need to implement a workaround
for it (see patch #6).

This series depends on version 6 of "xen/arm: Introduce alternative runtime
patching for ARM64" [1]. A branch with the two series can be found on xenbits:

git://xenbits.xen.org/people/julieng/xen-unstable.git branch abort-handlers-v2

Yours sincerely,

[1] https://lists.xenproject.org/archives/html/xen-devel/2016-07/msg02816.html

Julien Grall (6):
  xen/arm: traps: Simplify the switch in do_trap_*_abort_guest
  xen/arm: Provide macros to help creating workaround helpers
  xen/arm: Use check_workaround to handle the erratum 766422
  xen/arm: traps: MMIO should only be emulated for fault translation
  xen/arm: traps: Avoid unnecessary VA -> IPA translation in abort
    handlers
  xen/arm: arm64: Add Cortex-A57 erratum 834220 workaround

 docs/misc/arm/silicon-errata.txt      |  1 +
 xen/arch/arm/Kconfig                  | 21 +++++++++
 xen/arch/arm/cpuerrata.c              | 15 +++++++
 xen/arch/arm/traps.c                  | 81 ++++++++++++++++++++++-------------
 xen/include/asm-arm/arm32/processor.h |  4 --
 xen/include/asm-arm/arm64/processor.h |  2 -
 xen/include/asm-arm/cpuerrata.h       | 42 ++++++++++++++++++
 xen/include/asm-arm/cpufeature.h      |  4 +-
 xen/include/asm-arm/processor.h       |  2 +
 9 files changed, 136 insertions(+), 36 deletions(-)

-- 
1.9.1


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