On Fri, 2020-12-04 at 22:21 +0100, Thomas Gleixner wrote:
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> On Fri, Nov 27 2020 at 17:59, Balbir Singh wrote:
> >
On Fri, Nov 27 2020 at 17:59, Balbir Singh wrote:
>
> + /*
> + * Flush only if SMT is disabled as per the contract, which is checked
> + * when the feature is enabled.
> + */
> + if (sched_smt_active() && !this_cpu_read(cpu_info.smt_active) &&
> + (prev_mm &
Implement a mechanism to selectively flush the L1D cache. The goal is to
allow tasks that want to save sensitive information, found by the recent
snoop assisted data sampling vulnerabilites, to flush their L1D on being
switched out. This protects their data from being snooped or leaked via
side
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