Re: [PATCH v2 4/4] arm64: Rework ARM_ERRATUM_1414080 handling

2020-07-06 Thread Mark Rutland
On Mon, Jul 06, 2020 at 05:38:02PM +0100, Marc Zyngier wrote: > The current handling of erratum 1414080 has the side effect that > cntkctl_el1 can get changed for both 32 and 64bit tasks. > > This isn't a problem so far, but if we ever need to mitigate another > of these errata on the 64bit side,

[PATCH v2 4/4] arm64: Rework ARM_ERRATUM_1414080 handling

2020-07-06 Thread Marc Zyngier
The current handling of erratum 1414080 has the side effect that cntkctl_el1 can get changed for both 32 and 64bit tasks. This isn't a problem so far, but if we ever need to mitigate another of these errata on the 64bit side, we'd better keep the messing with cntkctl_el1 local to 32bit tasks.