[L] Change in coreboot[main]: mb/qemu-q35/smihandler.c: add support for SMIs on QEMU

[Krystian Hebel (Code Review)]

Attention is currently required from: Michał Kopeć, Michał Żygowski, Patrick Rudolph, Paul Menzel, Sergii Dmytruk.

Krystian Hebel has posted comments on this change by Krystian Hebel. ( https://review.coreboot.org/c/coreboot/+/82558?usp=email )

Change subject: mb/qemu-q35/smihandler.c: add support for SMIs on QEMU
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Patch Set 3:

(2 comments)

Patchset:

PS2:
> The same comments as in https://review.coreboot.org/c/coreboot/+/78088 apply. […]

Moved the implementation to board directory. This also allowed me to fix SMM for qemu-system-i386.

File src/southbridge/intel/common/smihandler.c:

https://review.coreboot.org/c/coreboot/+/82558/comment/b2270850_f5d1e406?usp... :
PS2, Line 216: #if !CONFIG(CPU_QEMU_X86)
             : 		/* Check for Synchronous IO (bit0 == 1) */
             : 		if (!(state->io_misc_info & (1 << 0)))
             : 			continue;
             : 
             : 		/* Make sure it was a write (bit4 == 0) */
             : 		if (state->io_misc_info & (1 << 4))
             : 			continue;
             : 
             : 		/* Check for APMC IO port */
             : 		if (((state->io_misc_info >> 16) & 0xff) != APM_CNT)
             : 			continue;
             : #endif
> Can this be done in C instead of using the preprocessor?

I've moved the code to board directory and modified significantly, so this no longer applies.