Add MCE patch for Threadripper 3000 series compatibility
A forum user reported that our kernel does not boot on Threadripper 3000
series CPUs, unless 'mce=off' is provided on the kernel commandline. [0]
This is a known issue, which has been fixed in mainline kernels and
backported to 5.4, 4.19 and 4.14 [1]. It is not, however, included in
5.3, nor in the Ubuntu builds. [2]
This patch is the original one posted for 5.5, which is the same as the
one ported to 5.4. It also applies cleanly to 5.3, and should work the
same, seeing as the backports to older versions do not have functional
changes either.
[0] https://forum.proxmox.com/threads/bug-pve-wont-boot-properly.63432/
[1] https://patchwork.kernel.org/project/linux-edac/list/?q=Allow+Reserved+types+to+be+overwritten+in+smca_banks
[2] https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/log/?qt=grep&q=Allow+Reserved+types+to+be+overwritten+in+smca_banks
Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
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