|
 |
4eb1a6 |
The microcode for Intel Broadwell-EP/EX (BDX-ML B/M/R0, family 6, model 79,
|
|
|
4eb1a6 |
stepping 1) processors requires a kernel with specific commits present,
|
|
|
539655 |
otherwise it might result in unexpected system behaviour. In order
|
|
|
539655 |
to handle this, /usr/libexec/microcode_ctl/update_ucode script creates
|
|
|
4eb1a6 |
necessary symlinks to make it available only on kernels with the aforementioned
|
|
|
4eb1a6 |
patches present. The required patches are present in the following versions
|
|
|
4eb1a6 |
of the kernel package:
|
|
|
4eb1a6 |
RHEL 7.6: kernel-3.10.0-894 or newer;
|
|
|
4eb1a6 |
RHEL 7.5.z: kernel-3.10.0-862.6.1 or newer;
|
|
|
4eb1a6 |
RHEL 7.4.z: kernel-3.10.0-693.35.1 or newer;
|
|
|
4eb1a6 |
RHEL 7.3.z: kernel-3.10.0-514.52.1 or newer;
|
|
|
4eb1a6 |
RHEL 7.2.z: kernel-3.10.0-327.70.1 or newer.
|
|
|
539655 |
|
|
|
4eb1a6 |
Please use the version of the kernel with the aforementioned patches when
|
|
|
4eb1a6 |
running on Intel Broadwell EP/EX processors in order to have the microcode
|
|
|
4eb1a6 |
updated.
|
|
|
539655 |
|
|
|
4eb1a6 |
If you want to avoid late loading of this ucode for a specific kernel, please
|
|
|
4eb1a6 |
create "disallow-late-06-4f-01" file inside /lib/firmware/<kernel_version>
|
|
|
4eb1a6 |
directory and run /usr/libexec/microcode_ctl/update_ucode script:
|
|
|
539655 |
|
|
|
4eb1a6 |
touch /lib/firmware/3.10.0-862.9.1/disallow-late-06-4f-01
|
|
|
4eb1a6 |
/usr/libexec/microcode_ctl/update_ucode
|
|
|
539655 |
|
|
|
4eb1a6 |
If you want to avoid late loading of this microcode for all kernels, please
|
|
|
4eb1a6 |
create "disallow-late-06-4f-01" file inside /etc/microcode_ctl/ucode_with
|
|
|
4eb1a6 |
caveats directory and run /usr/libexec/microcode_ctl/update_ucode script:
|
|
|
4eb1a6 |
|
|
|
4eb1a6 |
mkdir -p /etc/microcode_ctl/ucode_with_caveats
|
|
|
4eb1a6 |
touch /etc/microcode_ctl/ucode_with_caveats/disallow-late-06-4f-01
|
|
|
4eb1a6 |
/usr/libexec/microcode_ctl/update_ucode
|
|
|
4eb1a6 |
|
|
|
4eb1a6 |
If you want to enforce addition of this microcode to the firmware directory
|
|
|
4eb1a6 |
for a specific kernel, please create "force-late-06-4f-01" file inside
|
|
|
4eb1a6 |
/lib/firmware/<kernel_version> directory and run
|
|
|
4eb1a6 |
dracut -f --kver "<kernel_version>":
|
|
|
4eb1a6 |
|
|
|
4eb1a6 |
touch /lib/firmware/3.10.0-862.9.1/force-early-06-4f-01
|
|
|
4eb1a6 |
dracut -f --kver 3.10.0-862.9.1
|
|
|
4eb1a6 |
|
|
|
4eb1a6 |
If you want to enforce addition of this microcode for all kernels, add a line
|
|
|
4eb1a6 |
"06-4f-01" to the file /etc/microcode_ctl/force-early-microcode and run
|
|
|
4eb1a6 |
dracut -f --regenerate-all:
|
|
|
4eb1a6 |
|
|
|
4eb1a6 |
echo 06-4f-01 >> /etc/microcode_ctl/force-early-microcode
|
|
|
4eb1a6 |
dracut -f --regenerate-all
|
|
|
539655 |
|
|
|
539655 |
If you want avoid removal of the ucode file during cleanup, please remove the
|
|
|
4eb1a6 |
corresponding readme file (copy of this file in /lib/firmware/<kernel_version>).
|
|
|
4eb1a6 |
|
|
|
4eb1a6 |
|
|
|
4eb1a6 |
See /usr/share/doc/microcode_ctl/README.caveats for additional information.
|