On 08/03/18 13:21, Pali Rohár wrote: > On Thursday 08 March 2018 13:27:15 Pavel Machek wrote: >> Hi! >> >>> Resent without non-upstream patches. >>> >>> 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 >>> and no functional changes. >>> >>> No bug found from kernelci.org and lkft testing. It also could be gotten from: >>> >>> git://git.linaro.org/kernel/linux-linaro-stable.git v4.9-spectre-upstream-only >>> >>> Comments are appreciated! >> >> Not entirely related to this patched, but... I have few older ARM >> boards here, and Nokia N9000 I really care about. >> >> AFAICT Meltdown is arm64 only? > > IIRC ARMv7 is not affected by meltdown. > >> Spectre affects the older boards, too, right? Was there any work done >> on that? cpuinfo says "ARMv7" for N900. > > I remember that I saw some spectre patches for ARMv7 on LKML. > > In general for ARMv7 it is problematic as mitigation needs to change IBE Not quite. IBE is part of ACTLR, which is an implementation defined register, so generalizing this statement to "ARMv7" is plain wrong. Case in point: A9, A12/A17 do not need any bit to be set. A8 needs IBE to allow BPIALL to work, A15 needs it for ICIALLUI to perform a BP invalidation. M. -- Jazz is not dead. It just smells funny... -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
