Package: intel-microcode Version: 3.20180312.1~bpo8+1 Severity: normal Dear Maintainer,
I've installed intel-microcode from jessie-backports-sloppy and booted under Xen with the Xen commandline parameter "ucode=scan". This is supposed to scan the initramfs for a microcode update and apply it. Before doing this, the microcode revision on this machine was 0xb00001d. Xen does find an update and applies it during early boot: (XEN) microcode: CPU0 updated from revision 0xb00001d to 0xb000021, date = 2017-03-01 According to Intel's Microcode Update Guidance (<https://newsroom.intel.com/wp-content/uploads/sites/11/2018/04/microcode-update-guidance.pdf>) however, the expected revision for this CPU is 0x3C. /proc/cpuinfo: processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 79 model name : Intel(R) Xeon(R) CPU E5-1680 v4 @ 3.40GHz stepping : 1 microcode : 0xb000021 cpu MHz : 3400.028 cache size : 20480 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu de tsc msr pae mce cx8 apic sep mca cmov pat clflush acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl nonstop_tsc eagerfpu pni pclmulqdq monitor est ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch xsaveopt fsgsbase bmi1 hle avx2 bmi2 erms rtm rdseed adx bogomips : 6800.05 clflush size : 64 cache_alignment : 64 address sizes : 46 bits physical, 48 bits virtual power management: processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 79 model name : Intel(R) Xeon(R) CPU E5-1680 v4 @ 3.40GHz stepping : 1 microcode : 0xb000021 cpu MHz : 3400.028 cache size : 20480 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu de tsc msr pae mce cx8 apic sep mca cmov pat clflush acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl nonstop_tsc eagerfpu pni pclmulqdq monitor est ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch xsaveopt fsgsbase bmi1 hle avx2 bmi2 erms rtm rdseed adx bogomips : 6800.05 clflush size : 64 cache_alignment : 64 address sizes : 46 bits physical, 48 bits virtual power management: Were microcode updates pulled for this CPU (thus Intel's document is wrong) or is it a bug that the intel-microcode package doesn't include this updated revision? Or possibly it does contain it but the Xen hypervisor is doing something wrong? Thanks, Andy -- System Information: Debian Release: 8.10 APT prefers oldstable-updates APT policy: (500, 'oldstable-updates'), (500, 'oldstable') Architecture: amd64 (x86_64) Kernel: Linux 3.16.0-5-amd64 (SMP w/2 CPU cores) Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages intel-microcode depends on: ii iucode-tool 1.1.1-1 Versions of packages intel-microcode recommends: ii initramfs-tools 0.120+deb8u3 intel-microcode suggests no packages. -- no debconf information
