cpu/x86: Declare SMM_ASEG

This is really an inverse of SMM_TSEG to flag
platforms that should potentially move away
from ASEG implementation.

Change-Id: I3b9007c55c75a59a9e6acc0a0e701300f7d21f87
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34134
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/cpu/amd/agesa/Kconfig

@@ -30,6 +30,7 @@ config CPU_AMD_AGESA
 	select LAPIC_MONOTONIC_TIMER
 	select SPI_FLASH if HAVE_ACPI_RESUME
 	select POSTCAR_STAGE
+	select SMM_ASEG
 
 if CPU_AMD_AGESA
 

src/cpu/amd/pi/Kconfig

@@ -29,6 +29,7 @@ config CPU_AMD_PI
 	select LAPIC_MONOTONIC_TIMER
 	select SPI_FLASH if HAVE_ACPI_RESUME
 	select POSTCAR_STAGE if !BINARYPI_LEGACY_WRAPPER
+	select SMM_ASEG
 
 if CPU_AMD_PI
 

src/cpu/intel/model_f2x/Kconfig

@@ -6,3 +6,4 @@ config CPU_INTEL_MODEL_F2X
 	select ARCH_RAMSTAGE_X86_32
 	select SMP
 	select SUPPORT_CPU_UCODE_IN_CBFS
+	select SMM_ASEG

src/cpu/qemu-x86/Kconfig

@@ -22,3 +22,4 @@ config CPU_QEMU_X86
 	select SMP
 	select UDELAY_TSC
 	select C_ENVIRONMENT_BOOTBLOCK
+	select SMM_ASEG

src/cpu/x86/Kconfig

@@ -88,6 +88,15 @@ config LOGICAL_CPUS
 	bool
 	default y
 
+config HAVE_SMI_HANDLER
+	bool
+	default n
+	depends on (SMM_ASEG || SMM_TSEG)
+
+config SMM_ASEG
+	bool
+	default n
+
 config SMM_TSEG
 	bool
 	default n

src/cpu/x86/smm/smmrelocate.S

@@ -32,10 +32,9 @@
 // ADDR32() macro
 #include <arch/registers.h>
 
-#if CONFIG(SMM_TSEG)
-#error "Don't use this file with TSEG."
-
-#endif /* CONFIG_SMM_TSEG */
+#if !CONFIG(SMM_ASEG)
+#error "Only use this file with ASEG."
+#endif /* CONFIG_SMM_ASEG */
 
 #define LAPIC_ID 0xfee00020