Re: [PATCH 1/4] arm64: cpufeature: Effectively expose FRINT capability to userspace

2019-10-04 Thread Will Deacon
On Thu, Oct 03, 2019 at 12:12:08PM +0100, Julien Grall wrote: > The HWCAP framework will detect a new capability based on the sanitized > version of the ID registers. > > Sanitization is based on a whitelist, so any field not described will end > up to be zeroed. > > At the moment, ID_AA64ISAR1_E

[PATCH 1/4] arm64: cpufeature: Effectively expose FRINT capability to userspace

2019-10-03 Thread Julien Grall
The HWCAP framework will detect a new capability based on the sanitized version of the ID registers. Sanitization is based on a whitelist, so any field not described will end up to be zeroed. At the moment, ID_AA64ISAR1_EL1.FRINTTS is not described in ftr_id_aa64isar1. This means the field will b