Re: [gentoo-user] Re: AMD microcode updates - where are they?!

[Mick <michaelkintzios@gmail.com>]

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Thank you both, for your replies.

On Saturday, 13 July 2019 01:56:30 BST Adam Carter wrote:
> > > $ dmesg | grep -i micro
> > > [    0.622441] [drm] Loading ARUBA Microcode
> > > [    5.763242] [drm] Loading hainan Microcode
> > > [    6.653025] microcode: CPU0: patch_level=0x06001119
> > > [    6.657962] microcode: CPU1: patch_level=0x06001119
> > > [    6.658890] microcode: CPU2: patch_level=0x06001119
> > > [    6.659881] microcode: CPU3: patch_level=0x06001119
> > > [    6.661136] microcode: Microcode Update Driver: v2.2.
> > 
> > I have a similar experience:
> > 
> > [    0.659996] microcode: CPU0: patch_level=0x010000c8
> > [    0.660001] microcode: CPU1: patch_level=0x010000c8
> > [    0.660006] microcode: CPU2: patch_level=0x010000c8
> > [    0.660011] microcode: CPU3: patch_level=0x010000c8
> > [    0.660029] microcode: Microcode Update Driver: v2.2.
> > [    7.853509] [drm] Loading RS780 Microcode
> > 
> > I have a 10h generation processor, and I also build in microcode_amd.bin
> > with the kernel.

I had not until now built in 'amd-ucode/microcode_amd.bin', only 'amd-ucode/
microcode_amd_fam15h.bin', because this laptop has a 15h family CPU:

# lscpu
Architecture:        x86_64
CPU op-mode(s):      32-bit, 64-bit
Byte Order:          Little Endian
Address sizes:       48 bits physical, 48 bits virtual
CPU(s):              4
On-line CPU(s) list: 0-3
Thread(s) per core:  2
Core(s) per socket:  2
Socket(s):           1
NUMA node(s):        1
Vendor ID:           AuthenticAMD
CPU family:          21
Model:               19
Model name:          AMD A10-5750M APU with Radeon(tm) HD Graphics
Stepping:            1
CPU MHz:             1330.218
CPU max MHz:         2500.0000
CPU min MHz:         1400.0000
BogoMIPS:            4990.70
Virtualization:      AMD-V
L1d cache:           16K
L1i cache:           64K
L2 cache:            2048K
NUMA node0 CPU(s):   0-3
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 constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf 
pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 popcnt aes xsave avx f16c 
lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch 
osvw ibs xop skinit wdt lwp fma4 tce nodeid_msr tbm topoext perfctr_core 
perfctr_nb cpb hw_pstate ssbd vmmcall bmi1 arat npt lbrv svm_lock nrip_save 
tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold

$ dmesg | grep family:
[    0.291910] smpboot: CPU0: AMD A10-5750M APU with Radeon(tm) HD Graphics 
(family: 0x15, model: 0x13, stepping: 0x1)


>  Piledriver gets the early message barcelona/fam10h doesnt;
> 
>  # dmesg | grep microc
> [    1.663099] microcode: microcode updated early to new
> patch_level=0x06000852
> [    1.664161] microcode: CPU0: patch_level=0x06000852
> [    1.665147] microcode: CPU1: patch_level=0x06000852
> [    1.666135] microcode: CPU2: patch_level=0x06000852
> [    1.667119] microcode: CPU3: patch_level=0x06000852
> [    1.668034] microcode: CPU4: patch_level=0x06000852
> [    1.668955] microcode: CPU5: patch_level=0x06000852
> [    1.670060] microcode: CPU6: patch_level=0x06000852
> [    1.670985] microcode: CPU7: patch_level=0x06000852
> [    1.672012] microcode: Microcode Update Driver: v2.2.

OK, mine is also a Piledriver (mobile) CPU according to these tables:

https://en.wikichip.org/wiki/amd/a10

However, I don't see any early microcode being loaded.  :-/

I added 'amd-ucode/microcode_amd.bin' in the kernel, just in case it was 
needed and rebooted, but still no difference.

> # dmesg | grep microc
> [    1.700378] microcode: CPU0: patch_level=0x010000c8
> [    1.700435] microcode: CPU1: patch_level=0x010000c8
> [    1.700488] microcode: CPU2: patch_level=0x010000c8
> [    1.700543] microcode: CPU3: patch_level=0x010000c8
> [    1.700684] microcode: Microcode Update Driver: v2.2.
> 
> microcode_amd.bin hasn't changed since at least January 2018, so maybe
> there hasnt been any updates for the recent CPU vulnerabilities.
> 
> Assuming the numbering is sequential its odd that the APU is at 0x06001119
> but the latest from linux-firmware is only 0x010000c8. Are you sure the APU
> is not fam16h ?

Yes, positive.  As I've shown above the laptop has an A10 fam15h mobile 
Piledriver processor.

The desktop has an A10 Steamroller, Kaveri APU:

$ dmesg | grep family:
[    0.269754] smpboot: CPU0: AMD A10-7850K Radeon R7, 12 Compute Cores 4C+8G 
(family: 0x15, model: 0x30, stepping: 0x1)

It has the 'amd-ucode/microcode_amd_fam15h.bin' built in the kernel and it 
also shows no early microcode being loaded:

$ dmesg | grep micro
[    1.578553] microcode: CPU0: patch_level=0x06003106
[    1.579338] microcode: CPU1: patch_level=0x06003106
[    1.580943] microcode: CPU2: patch_level=0x06003106
[    1.581729] microcode: CPU3: patch_level=0x06003106
[    1.582608] microcode: Microcode Update Driver: v2.2.

Notice the patch number is slightly higher than the laptop's, which can be 
explained by the fact the desktop's Steamroller was launched in Jan 2014, 
while the laptop's Piledriver was launched in March 2013.

Anyway, this does not explain why your Piledriver at least is loading early 
the microcode, but mine isn't.  :-/

-- 
Regards,

Mick

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