The commit in question is marked for stable:
commit 841c2be09fe4f495fe5224952a419bd8c7e5b455
Author: Maxim Levitsky
Date: Wed Jul 8 14:57:31 2020 +0300
kvm: x86: replace kvm_spec_ctrl_test_value with runtime test on the host
To avoid complex and in some cases incorrect
** Also affects: qemu (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1349277
Title:
AArch64 emulation ignores SPSel=0 when taking (or returning