According to the following advisory[1] from HP, this is a known issue which is fixed upstream :
"Advisory: Red Hat Enterprise Linux 8.3 - Guest Stops Responding at efi_mokvar_sysfs_init+0xa9/0x19d with AMD Secure Encrypted Virtualization (SEV) Enabled" The upstream fix cited in the article is the following : https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8d651ee9c71bb12fc0c8eb2786b66cbe5aa3e43b x86/ioremap: Map EFI-reserved memory as encrypted for SEV Adding this commit on top of kernel 5.4.0-92.103 does fix the booting issue. [1] https://support.hpe.com/hpesc/public/docDisplay?docId=a00119071en_us&docLocale=en_US ** Also affects: linux (Ubuntu Hirsute) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Xenial) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Bionic) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1956575 Title: [Regression] Focal kernel 5.4.0-92.103 fails to boot when Secure Encrypted Virtualization(SEV) is enabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1956575/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
