46 lines
2.2 KiB
Plaintext
46 lines
2.2 KiB
Plaintext
Some Intel Tiger Lake-UP3/UP4 CPU models (TGL, family 6, model 140, stepping 1)
|
|
have reports of system hangs when a microcode update, that is included
|
|
since microcode-20201110 update, is applied[1]. In order to address this,
|
|
microcode update has been disabled by default on these systems.
|
|
|
|
[1] https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files/issues/44
|
|
|
|
For the reference, SHA1 checksums of 06-8c-01 microcode files containing
|
|
microcode revisions in question are listed below:
|
|
* 06-8c-01, revision 0x68: 2204a6dee1688980cd228268fdf4b6ed5904fe04
|
|
* 06-8c-01, revision 0x88: 61b6590feb2769046d5b0c394179beaf2df51290
|
|
|
|
Please contact your system vendor for a BIOS/firmware update that contains
|
|
the latest microcode version.
|
|
|
|
The information regarding enforcing microcode update is provided below.
|
|
|
|
To enforce usage of the latest 06-8c-01 microcode revision for a specific kernel
|
|
version, please create a file "force-intel-06-8c-01" inside
|
|
/lib/firmware/<kernel_version> directory, run
|
|
"/usr/libexec/microcode_ctl/update_ucode" to add it to firmware directory
|
|
where microcode will be available for late microcode update, and run
|
|
"dracut -f --kver <kernel_version>", so initramfs for this kernel version
|
|
is regenerated and the microcode can be loaded early, for example:
|
|
|
|
touch /lib/firmware/3.10.0-862.9.1/force-intel-06-8c-01
|
|
/usr/libexec/microcode_ctl/update_ucode
|
|
dracut -f --kver 3.10.0-862.9.1
|
|
|
|
After that, it is possible to perform a late microcode update by executing
|
|
"/usr/libexec/microcode_ctl/reload_microcode" or by writing value "1" to
|
|
"/sys/devices/system/cpu/microcode/reload" directly.
|
|
|
|
To enforce addition of this microcode for all kernels, please create file
|
|
"/etc/microcode_ctl/ucode_with_caveats/force-intel-06-8c-01", run
|
|
"/usr/libexec/microcode_ctl/update_ucode" for enabling late microcode updates,
|
|
and "dracut -f --regenerate-all" for enabling early microcode updates:
|
|
|
|
mkdir -p /etc/microcode_ctl/ucode_with_caveats
|
|
touch /etc/microcode_ctl/ucode_with_caveats/force-intel-06-8c-01
|
|
/usr/libexec/microcode_ctl/update_ucode
|
|
dracut -f --regenerate-all
|
|
|
|
Please refer to /usr/share/doc/microcode_ctl/README.caveats for additional
|
|
information.
|