Messages in this thread | | | Date | Thu, 19 Jul 2018 11:01:10 +0100 | From | Russell King - ARM Linux <> | Subject | Re: arm: v4.18-rc5 with cpuidle on TC2 (A7 boot) spectre v2 issue |
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On Thu, Jul 19, 2018 at 11:42:50AM +0200, Dietmar Eggemann wrote: > Hi, > > running v4.18-rc5 (plus still missing "power: vexpress: fix corruption in > notifier registration", otherwise I get this rcu_sched stall issue) on TC2 > (A7 boot) with vanilla multi_v7_defconfig plus > CONFIG_ARM_BIG_LITTLE_CPUIDLE=y gives me continuous: > > ... > CPUX: Spectre v2: incorrect context switching function, system vulnerable > ... > > messages. > > Work around is to disable CONFIG_HARDEN_BRANCH_PREDICTOR.
or disable big.Little if you want the hardening.
The choices are currently either protection against Spectre or big.Little support since the two are mutually exclusive at the moment.
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