Documentation/x86: Document the intricacies of GS context switching

Summarized from the thread at Link by AI, with additions and
improvements by H. Peter Anvin and Andrew Cooper.

Assisted-by: Claude Code:claude-sonnet-4-6
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/all/20260604015303.GEaiDafyuU0bwP4Y05@fat_crate.local
This commit is contained in:
Borislav Petkov (AMD) 2026-06-17 18:09:02 -07:00
commit fecdffa85f