[Xen-devel] [PATCH v6 0/7] xen/arm: Introduce alternative runtime patching on ARM64

[Julien Grall <julien.grall@xxxxxxx>]

Hello,

Some of the processor errata will require to modify code sequence. As those
modifications may impact the performance, they should only be enabled on
affected cores. Furthermore, Xen may also want to take advantage of
new hardware features coming up with v8.1 and v8.2.

The first part of the series adds the alternative infrastructure, most of
the code is based on Linux v4.6-rc3. The rest of the series implements
errata for Cortex-A57 and Cortex-A53.

A branch with all the patches can be found here:

git://xenbits.xen.org/people/julieng/xen-unstable.git branch alternative-v6

For all the changes, see in each patch.

Yours sincerely,

Julien Grall (7):
  xen/arm: Introduce alternative runtime patching
  xen/arm: cpufeature: Provide an helper to check if a capability is
    supported
  xen/arm: Detect silicon revision and set cap bits accordingly
  xen/arm: Document the errata implemented in Xen
  xen/arm: arm64: Add Cortex-A53 cache errata workaround
  xen/arm: arm64: Add cortex-A57 erratum 832075 workaround
  xen/arm: traps: Don't inject a fault if the translation VA -> IPA
    fails

 docs/misc/arm/silicon-errata.txt  |  49 +++++++++
 xen/arch/arm/Kconfig              |  96 ++++++++++++++++
 xen/arch/arm/Makefile             |   2 +
 xen/arch/arm/alternative.c        | 224 ++++++++++++++++++++++++++++++++++++++
 xen/arch/arm/arm64/cache.S        |   2 +
 xen/arch/arm/cpuerrata.c          |  60 ++++++++++
 xen/arch/arm/cpufeature.c         |  16 +++
 xen/arch/arm/setup.c              |  10 ++
 xen/arch/arm/smpboot.c            |   3 +
 xen/arch/arm/traps.c              |   5 +-
 xen/arch/arm/xen.lds.S            |   9 ++
 xen/include/asm-arm/alternative.h | 165 ++++++++++++++++++++++++++++
 xen/include/asm-arm/arm64/insn.h  |  16 +++
 xen/include/asm-arm/arm64/io.h    |  21 +++-
 xen/include/asm-arm/arm64/page.h  |   7 +-
 xen/include/asm-arm/cpuerrata.h   |  14 +++
 xen/include/asm-arm/cpufeature.h  |  20 +++-
 xen/include/asm-arm/processor.h   |   8 ++
 18 files changed, 718 insertions(+), 9 deletions(-)
 create mode 100644 docs/misc/arm/silicon-errata.txt
 create mode 100644 xen/arch/arm/alternative.c
 create mode 100644 xen/arch/arm/cpuerrata.c
 create mode 100644 xen/include/asm-arm/alternative.h
 create mode 100644 xen/include/asm-arm/cpuerrata.h

-- 
1.9.1


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