On 05/13/2018 10:39 PM, tu...@posteo.de wrote: > Hi, > > from a previous thread I learned which micorcode file needs > to be loaded for the "fight against Spectre and Melddown"... > > Now two question came up for me: > 1.) WIth this particular micorcode loaded: Do I need to activate > the Spectre/Meldtown fix in the kernel itsself? > 2.) Which microcode file gets loaded? > > cat /proc/cpuinfo (from one of the six cores): > processor : 4 > vendor_id : AuthenticAMD > cpu family : 16 > model : 10 > model name : AMD Phenom(tm) II X6 1090T Processor > stepping : 0 > microcode : 0x10000bf > cpu MHz : 1755.530 > cache size : 512 KB > physical id : 0 > siblings : 6 > core id : 4 > cpu cores : 6 > apicid : 4 > initial apicid : 4 > fpu : yes > fpu_exception : yes > cpuid level : 6 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov > pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb > rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc cpuid > extd_apicid aperfmperf pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic > cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt cpb > hw_pstate vmmcall npt lbrv svm_lock nrip_save pausefilter > bugs : tlb_mmatch apic_c1e fxsave_leak sysret_ss_attrs null_seg > amd_e400 spectre_v1 spectre_v2 > bogomips : 7224.41 > TLB size : 1024 4K pages > clflush size : 64 > cache_alignment : 64 > address sizes : 48 bits physical, 48 bits virtual > power management: ts ttp tm stc 100mhzsteps hwpstate cpb > > > from dmesg (microcode-related lines): > [ 1.517265] microcode: CPU0: patch_level=0x010000bf > [ 1.517367] microcode: CPU1: patch_level=0x010000bf > [ 1.517450] microcode: CPU2: patch_level=0x010000bf > [ 1.517538] microcode: CPU3: patch_level=0x010000bf > [ 1.517628] microcode: CPU4: patch_level=0x010000bf > [ 1.517716] microcode: CPU5: patch_level=0x010000bf > [ 1.517824] microcode: Microcode Update Driver: v2.2. > > from linux-firmware (related lines): > /lib/firmware/amd-ucode/microcode_amd.bin > /lib/firmware/amd-ucode/microcode_amd_fam15h.bin > /lib/firmware/amd-ucode/microcode_amd.bin.asc > /lib/firmware/amd-ucode/microcode_amd_fam16h.bin *** > /lib/firmware/amd-ucode/microcode_amd_fam17h.bin > /lib/firmware/amd-ucode/microcode_amd_fam16h.bin.asc *** > /lib/firmware/amd-ucode/microcode_amd_fam15h.bin.asc > > (***) I think, these microcodes do I need... > > Thanks for any help in advance! > Cheers > Meino > > > > > .
No Spectre/Meltdown fixes in these files, apparently. Simple experiment(s) to confirm the ucode file to use : ( repetitive, but simple ) Build a kernel with NO ucode, boot, note the patch_level. Build a kernel with microcode_amd.bin ucode ONLY, boot, note the patch_level. Build a kernel with microcode_amd_fam15h ucode ONLY, boot, note the patch_level. Build a kernel with microcode_amd_fam16h ucode ONLY, boot, note the patch_level. Build a kernel with microcode_amd_fam17h ucode ONLY, boot, note the patch_level. Results : When I did this on a Phenom II 980 x4, the only time the patch level changed was with "microcode_amd.bin" ucode. When I do this on a FX-9590, the only time the patch level changes is when "microcode_amd_fam15h.bin" ucode is used. Corbin
