Re: [PATCH 05/14] arm64: Add 'ssbd' command-line option

2018-05-24 Thread Marc Zyngier
On 24/05/18 12:40, Mark Rutland wrote: > On Tue, May 22, 2018 at 04:06:39PM +0100, Marc Zyngier wrote: >> On a system where the firmware implements ARCH_WORKAROUND_2, >> it may be useful to either permanently enable or disable the >> workaround for cases where the user decides that they'd rather >>

Re: [PATCH 05/14] arm64: Add 'ssbd' command-line option

2018-05-24 Thread Mark Rutland
On Tue, May 22, 2018 at 04:06:39PM +0100, Marc Zyngier wrote: > On a system where the firmware implements ARCH_WORKAROUND_2, > it may be useful to either permanently enable or disable the > workaround for cases where the user decides that they'd rather > not get a trap overhead, and keep the mitiga

Re: [PATCH 05/14] arm64: Add 'ssbd' command-line option

2018-05-23 Thread Julien Grall
Hi Marc, On 05/22/2018 04:06 PM, Marc Zyngier wrote: On a system where the firmware implements ARCH_WORKAROUND_2, it may be useful to either permanently enable or disable the workaround for cases where the user decides that they'd rather not get a trap overhead, and keep the mitigation permanent

Re: [PATCH 05/14] arm64: Add 'ssbd' command-line option

2018-05-22 Thread Randy Dunlap
On 05/22/2018 08:06 AM, Marc Zyngier wrote: > On a system where the firmware implements ARCH_WORKAROUND_2, > it may be useful to either permanently enable or disable the > workaround for cases where the user decides that they'd rather > not get a trap overhead, and keep the mitigation permanently >

[PATCH 05/14] arm64: Add 'ssbd' command-line option

2018-05-22 Thread Marc Zyngier
On a system where the firmware implements ARCH_WORKAROUND_2, it may be useful to either permanently enable or disable the workaround for cases where the user decides that they'd rather not get a trap overhead, and keep the mitigation permanently on or off instead of switching it on exception entry/