Change in coreboot[master]: arch/x86: Support x86_64 exceptions

[Patrick Rudolph (Code Review)]

Hello build bot (Jenkins), Raul Rangel, Patrick Rudolph, Arthur Heymans, Krystian Hebel,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/30117

to look at the new patch set (#32).

Change subject: arch/x86: Support x86_64 exceptions
......................................................................

arch/x86: Support x86_64 exceptions

*   Doesn't affect existing x86_32 code.

Tested on qemu using division by zero.
Tested on Lenovo T410 with additional x86_64 patches.

Change-Id: Idd12c90a95cc2989eb9b2a718740a84222193f48
Signed-off-by: Patrick Rudolph 
---
M Documentation/arch/x86/index.md
M src/arch/x86/exception.c
M src/arch/x86/idt.S
M src/arch/x86/include/arch/registers.h
4 files changed, 141 insertions(+), 40 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/17/30117/32