Re: [PATCH v4 25/28] arm64/sve: Detect SVE and activate runtime support

2017-10-27 Thread Catalin Marinas
On Fri, Oct 27, 2017 at 11:51:07AM +0100, Dave P Martin wrote: > This patch enables detection of hardware SVE support via the > cpufeatures framework, and reports its presence to the kernel and > userspace via the new ARM64_SVE cpucap and HWCAP_SVE hwcap > respectively. > > Userspace can also dete

[PATCH v4 25/28] arm64/sve: Detect SVE and activate runtime support

2017-10-27 Thread Dave Martin
This patch enables detection of hardware SVE support via the cpufeatures framework, and reports its presence to the kernel and userspace via the new ARM64_SVE cpucap and HWCAP_SVE hwcap respectively. Userspace can also detect SVE using ID_AA64PFR0_EL1, using the cpufeatures MRS emulation. When ru