On 7/17/19 5:58 AM, Mick wrote: > Hmm ... My last line looks the same like Rich's, but different to yours: > > # cat /sys/devices/system/cpu/vulnerabilities/spectre_v2 > Mitigation: Full AMD retpoline, STIBP: disabled, RSB filling > > I don't have IBPB mentioned in there at all. I'm on gentoo-sources-4.19.57. > Are you running a later kernel? > > According to this article a microcode update seems to be necessary, but I'm > not sure if this statement only applies to Intel CPUs: > > https://access.redhat.com/articles/3311301#indirect-branch-prediction-barriers-ibpb-10 > ------
My kernel version : 4.19.59 Please note that I am using the "experimental" USE FLAG for "sys-kernel/gentoo-sources". CPU selected is "AMD Piledriver" Also, I am using the latest firmware for "sys-kernel/linux-firmware" ( 20190712:0 ). Kernel command line parameters on boot : "spectre_v2=on spectre_v2_user=on spec_store_bypass_disable=on" Corbin
