x86: efi_loader: Ensure the SMBIOS tables are sent via EFI

The EFI-loader code has not been fully converted to use bloblist, so
relies on the SMBIOS-table address being set in global_data.

Set this up in write_tables() so that the SMBIOS tables are actually
available.

Enable the command for x86 QEMU so that the SMBIOS tests actually run.

Signed-off-by: Simon Glass <sjg@chromium.org>
Fixes: 83ce35d6eb ("emulation: Use bloblist to hold tables")
Reported-by: Niklas Sombert <niklas.sombert@uni-duesseldorf.de>

arch/x86/lib/tables.c

@@ -126,6 +126,8 @@ int write_tables(void)
 			use_high = true;
 			if (!gd->arch.table_start_high)
 				gd->arch.table_start_high = rom_addr;
+			if (table->tag == BLOBLISTT_SMBIOS_TABLES)
+				gd_set_smbios_start(rom_addr);
 		}
 		rom_table_end = table->write(rom_addr);
 		if (!rom_table_end) {

board/emulation/qemu-x86/Kconfig

@@ -23,5 +23,6 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	imply VIRTIO_PCI
 	imply VIRTIO_NET
 	imply VIRTIO_BLK
+	imply CMD_SMBIOS
 
 endif

lib/efi_loader/efi_smbios.c

@@ -35,6 +35,7 @@ efi_status_t efi_smbios_register(void)
 	void *buf;
 
 	addr = gd_smbios_start();
+	printf("register %lx\n", addr);
 	if (!addr) {
 		log_err("No SMBIOS tables to install\n");
 		return EFI_NOT_FOUND;