On 20.03.2025 21:17, Andrew Cooper wrote: > Something I overlooked when last cleaning up exception handling is that a TSS > is not necessary if IST isn't configured, and IST isn't necessary until we're > running guest code. > > Introduce early_traps_init(), and rearrange the existing logic between this > and traps_init() later on boot, to allow defering TSS and IST setup. > > In early_traps_init(), load the IDT and invalidate TR/LDTR; this sufficient > system-table setup to make exception handling work. The setup of the BSPs > per-cpu variables stay early too; they're used on certain error paths. > > Move load_system_tables() later into traps_init(). Note that it already > contains enable_each_ist(), so the call is simply dropped. > > This removes some complexity prior to having exception support, and lays the > groundwork to not even allocate a TSS when using FRED. > > No practical change. > > Signed-off-by: Andrew Cooper <andrew.coop...@citrix.com>
Reviewed-by: Jan Beulich <jbeul...@suse.com>
