[v3,0/4] Spectre BHB follow up

Message

Bertrand Marquis June 13, 2022, 12:53 p.m. UTC

Following up the handling of Spectre BHB on Arm (XSA-398), this serie
contain several changes which were not needed in the XSA patches but
should be done in Xen:
- Sync sysregs and cpuinfo with latest version of Linux (5.18-rc3)
- Add new fields inside cpufeature
- Add sb instruction support. Some newer generations of CPU
  (Neoverse-N2) do support the instruction so add support for it in Xen.
- Create hidden Kconfig entries for CONFIG_ values actually used in
  arm64 cpufeature.

Changes in v3:
- add R-b and A-b on patches
- fixes in sb support patch
Changes in v2:
- remove patch which was merged (workaround 1 when workaround 3 is done)
- split sync with linux and update of cpufeatures
- add patch to define kconfig entries used by arm64 cpufeature

Bertrand Marquis (4):
  xen/arm: Sync sysregs and cpuinfo with Linux 5.18-rc3
  xen/arm: Add sb instruction support
  arm: add ISAR2, MMFR0 and MMFR1 fields in cpufeature
  arm: Define kconfig symbols used by arm64 cpufeatures

 xen/arch/arm/Kconfig                     | 28 +++++++++
 xen/arch/arm/arm64/cpufeature.c          | 18 +++++-
 xen/arch/arm/cpufeature.c                | 28 +++++++++
 xen/arch/arm/include/asm/arm64/sysregs.h | 76 ++++++++++++++++++++----
 xen/arch/arm/include/asm/cpufeature.h    | 34 +++++++++--
 xen/arch/arm/include/asm/macros.h        | 19 +++++-
 xen/arch/arm/setup.c                     |  3 +
 xen/arch/arm/smpboot.c                   |  1 +
 8 files changed, 186 insertions(+), 21 deletions(-)