Re: spectre on 4.9 backporting review

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Hi Alex,

On 26/02/18 08:19, Alex Shi wrote:
> Hi All,
> 
> This backport patchset fixed the spectre issue, it's original branch:
> https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=kpti
> A few dependency or fixingpatches are also picked up, if they are necessary
>  or no functional changes.
> 
> arm64: cpu_errata: Allow an erratum to be match for all revisions of a core
> arm64: cpufeature: __this_cpu_has_cap() shouldn't stop early
> arm64: syscallno is secretly an int, make it official
> arm64: uaccess: consistently check object sizes
> arm64: Factor out TTBR0_EL1 post-update workaround into a specific asm macro
> arm64: Factor out PAN enabling/disabling into separate uaccess_* macros
> arm64: move TASK_* definitions to <asm/processor.h>
> arm64: alternatives: apply boot time fixups via the linear mapping
> mm: Introduce lm_alias
> 
> The patchset also on repository:
> 	git://git.linaro.org/kernel/linux-linaro-stable.git lts-4.9-spectrevv2 
> 
> The kernelci.org and lkft testing show no regressions.
> 
> Any comments are appreciated!
> 
> Regards
> Alex

[...]

>       arm: Add BTB invalidation on switch_mm for Cortex-A9, A12 and A17
>       arm: Invalidate BTB on prefetch abort outside of user mapping on Cortex A8, A9, A12 and A17
>       arm: KVM: Invalidate BTB on guest exit for Cortex-A12/A17
>       arm: Add icache invalidation on switch_mm for Cortex-A15
>       arm: Invalidate icache on prefetch abort outside of user mapping on Cortex-A15
>       arm: KVM: Invalidate icache on guest exit for Cortex-A15

Please drop these patches. They were never merged in mainline, and thus
cannot be "backported". If they ever make it into a mainline kernel,
then will be the time to backport them. In the meantime, let's remove them.

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...



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