[coreboot-gerrit] Change in coreboot[master]: cpu/x86/smm/smm_stub: Add x86_64 support

[Patrick Rudolph (Code Review)]

Patrick Rudolph has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/37392 )

Change subject: cpu/x86/smm/smm_stub: Add x86_64 support
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Patch Set 6:

(1 comment)

https://review.coreboot.org/c/coreboot/+/37392/6/src/cpu/x86/smm/smm_stub.S 
File src/cpu/x86/smm/smm_stub.S:

https://review.coreboot.org/c/coreboot/+/37392/6/src/cpu/x86/smm/smm_stub.S@... 
PS6, Line 205: %eax
> %rax? That would be needed if TSEG is above 4G?

Yes, but the Documention section about x86_64 states that this doesn't happen.
Once all x86_64 patches have been merged for qemu x86_64 support, those restrictions can be removed and this code (and other parts) needs to be updated as well.
However what's the benefit of having TSEG above 4G?