Re: [U-Boot] [RFC PATCH 2/2] ARM: Introduce ability to enable invalidate of BTB on Cortex-A15 for CVE-2017-5715

2018-01-26 Thread Nishanth Menon
On 01/26/2018 03:17 AM, Marc Zyngier wrote: On 25/01/18 21:45, Nishanth Menon wrote: As recommended by Arm in [1], ACR needs to be set[2] to enable invalidation of BTB. This has to be enabled unconditionally for ICIALLU to be functional on Cortex-A15 processors. Provide a config Not quite.

Re: [U-Boot] [RFC PATCH 2/2] ARM: Introduce ability to enable invalidate of BTB on Cortex-A15 for CVE-2017-5715

2018-01-26 Thread Marc Zyngier
On 25/01/18 21:45, Nishanth Menon wrote: > As recommended by Arm in [1], ACR needs to be set[2] to enable > invalidation of BTB. This has to be enabled unconditionally for > ICIALLU to be functional on Cortex-A15 processors. Provide a config Not quite. ACTLR[0] (Enable invalidates of BTB) has to

[U-Boot] [RFC PATCH 2/2] ARM: Introduce ability to enable invalidate of BTB on Cortex-A15 for CVE-2017-5715

2018-01-25 Thread Nishanth Menon
As recommended by Arm in [1], ACR needs to be set[2] to enable invalidation of BTB. This has to be enabled unconditionally for ICIALLU to be functional on Cortex-A15 processors. Provide a config option for platforms to enable this option based on impact analysis for products. NOTE: This patch in