Re: [PATCH v4 11/16] powerpc: Enable Prefixed Instructions

2020-03-23 Thread Nicholas Piggin
Jordan Niethe's on March 20, 2020 3:18 pm: > From: Alistair Popple > > Prefix instructions have their own FSCR bit which needs to enabled via > a CPU feature. The kernel will save the FSCR for problem state but it > needs to be enabled initially. > > If prefixed instructions are made unavailable

[PATCH v4 11/16] powerpc: Enable Prefixed Instructions

2020-03-19 Thread Jordan Niethe
From: Alistair Popple Prefix instructions have their own FSCR bit which needs to enabled via a CPU feature. The kernel will save the FSCR for problem state but it needs to be enabled initially. If prefixed instructions are made unavailable by the [H]FSCR, attempting to use them will cause a faci