seabios: add microvm config, update build rules

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Sergio Lopez <slp@redhat.com>
Message-id: 20200915120909.20838-3-kraxel@redhat.com

roms/Makefile

@@ -72,9 +72,12 @@ default help:
 	@echo "  clean              -- delete the files generated by the previous" \
 	                              "build targets"
 
-bios: build-seabios-config-seabios-128k build-seabios-config-seabios-256k
+bios: build-seabios-config-seabios-128k \
+		build-seabios-config-seabios-256k \
+		build-seabios-config-seabios-microvm
 	cp seabios/builds/seabios-128k/bios.bin ../pc-bios/bios.bin
 	cp seabios/builds/seabios-256k/bios.bin ../pc-bios/bios-256k.bin
+	cp seabios/builds/seabios-microvm/bios.bin ../pc-bios/bios-microvm.bin
 
 vgabios seavgabios: $(patsubst %,seavgabios-%,$(vgabios_variants))
 

roms/config.seabios-microvm

+CONFIG_QEMU=y
+CONFIG_QEMU_HARDWARE=y
+CONFIG_PERMIT_UNALIGNED_PCIROM=y
+CONFIG_ROM_SIZE=128
+CONFIG_XEN=n
+CONFIG_BOOTSPLASH=n
+CONFIG_ATA=n
+CONFIG_AHCI=n
+CONFIG_SDCARD=n
+CONFIG_PVSCSI=n
+CONFIG_ESP_SCSI=n
+CONFIG_LSI_SCSI=n
+CONFIG_MEGASAS=n
+CONFIG_MPT_SCSI=n
+CONFIG_FLOPPY=n
+CONFIG_FLASH_FLOPPY=n
+CONFIG_NVME=n
+CONFIG_PS2PORT=n
+CONFIG_USB=n
+CONFIG_LPT=n
+CONFIG_RTC_TIMER=n
+CONFIG_USE_SMM=n
+CONFIG_PMTIMER=n
+CONFIG_TCGBIOS=n
+CONFIG_HARDWARE_IRQ=n
+CONFIG_ACPI_PARSE=y