27 Apr
2022
27 Apr
'22
12:55 p.m.
On Wed, Apr 27, 2022 at 12:14:32AM +0200, Marek Szyprowski wrote:
This patchset landed in linux next-20220426. By default SME is enabled and it breaks CPU hot-plug on all my arm64 test systems. Bisect points this patch, because it finally enables this feature. Here is a report from QEMU's arm64 virt machine:
This is the cpucaps infrastructure not being able to cope with FA64 since it's in a register which is only there if the base SME feature is there. It works during boot because we have custom code for walking through the registers there, and it works for the hwcaps for both SVE and SME because at first look we don't seem to recheck them for secondaries.