CVSROOT: /cvs
Module name: src
Changes by: [email protected] 2023/04/24 03:04:03
Modified files:
sys/arch/amd64/amd64: acpi_machdep.c cpu.c hibernate_machdep.c
Log message:
Toggle IBT off during amd64 hibernate before dropping to real mode.
Hibernate on IBT-capable MP systems broke when trying to quiesce
cpus. Instead of finding the locations of endbr64 in the asm indirect
jumps in acpi_wakecode.S, simply disable CR4.CET beforehand and
re-enable on resume.
This will also disable shadowstack, but there are no plans to use it.
"this approach is fine" deraadt@
