On Tue, 2022-04-05 at 02:49 +0000, Joel Stanley wrote: > I booted both patches in this series on a power10 powernv machine, > applied on top of v5.18-rc1: > > $ dmesg |grep -i flush > [ 0.000000] rfi-flush: fallback displacement flush available > [ 0.000000] rfi-flush: patched 12 locations (no flush) > [ 0.000000] count-cache-flush: flush disabled. > [ 0.000000] link-stack-flush: flush disabled.
In this case you'd be looking for stf-barrier, uaccess-flush and entry- flush so this doesn't tell us anything. This must have been from a no_spectrev2 boot with count cache and link stack flushes disabled. > > $ grep . /sys/devices/system/cpu/vulnerabilities/* > /sys/devices/system/cpu/vulnerabilities/itlb_multihit:Not affected > /sys/devices/system/cpu/vulnerabilities/l1tf:Not affected > /sys/devices/system/cpu/vulnerabilities/mds:Not affected > /sys/devices/system/cpu/vulnerabilities/meltdown:Not affected > /sys/devices/system/cpu/vulnerabilities/spec_store_bypass:Not > affected > /sys/devices/system/cpu/vulnerabilities/spectre_v1:Mitigation: __user > pointer sanitization, ori31 speculation barrier enabled > /sys/devices/system/cpu/vulnerabilities/spectre_v2:Mitigation: > Software count cache flush (hardware accelerated), Software link > stack > flush > /sys/devices/system/cpu/vulnerabilities/srbds:Not affected > /sys/devices/system/cpu/vulnerabilities/tsx_async_abort:Not affected > > Does that match what we expect? This is as expected for P10, though clearly from a different boot to the above :) - Russell > > Cheers, > > Joel
