Re: [PATCH v2 0/4] Spectre BHB follow up

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

I reviewed patches #1 and #3. Julien had already started reviewing the
other patches in details so it is probably better if he continues his
reviews on those. So I skipped them for now. Let me know if you'd like
me to review them.

On Tue, 31 May 2022, Bertrand Marquis wrote:
> 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 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        | 33 +++++++---
>  xen/arch/arm/setup.c                     |  3 +
>  xen/arch/arm/smpboot.c                   |  1 +
>  8 files changed, 193 insertions(+), 28 deletions(-)
> 
> -- 
> 2.25.1
>