[XS] Change in coreboot[main]: arch/x86/include/smm: improve documentation of call_smm

[Felix Held (Code Review)]

Attention is currently required from: Felix Held, Jérémy Compostella, Matt DeVillier.

Hello Jérémy Compostella, Matt DeVillier, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/79834?usp=email

to look at the new patch set (#2).

The following approvals got outdated and were removed:
Code-Review+1 by Matt DeVillier, Verified+1 by build bot (Jenkins)

Change subject: arch/x86/include/smm: improve documentation of call_smm
......................................................................

arch/x86/include/smm: improve documentation of call_smm

Since the inline assembly code doesn't make it exactly obvious how this
function to call the APMC SMI handler works in detail and especially how
it passes the sub-command and argument pointer to the SMI handler, add a
more detailed explanation as comment.

Signed-off-by: Felix Held 
Change-Id: I3566af191492ce00a3033335ff80e01c33e98e63
---
M src/arch/x86/include/smm_call.h
1 file changed, 4 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/34/79834/2