efi: Use the installed SMBIOS tables

U-Boot should set up the SMBIOS tables during startup, as it does on x86.
Ensure that it does this correctly on non-x86 machines too, by creating
an event spy for last-stage init.

Tidy up the installation-condition code while we are here.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

board/Marvell/mvebu_armada-37xx/board.c

@@ -307,7 +307,8 @@ static int last_stage_init(void)
 	struct udevice *bus;
 	ofnode node;
 
-	if (!of_machine_is_compatible("globalscale,espressobin"))
+	if (!CONFIG_IS_ENABLED(DM_MDIO) ||
+	    !of_machine_is_compatible("globalscale,espressobin"))
 		return 0;
 
 	node = ofnode_by_compatible(ofnode_null(), "marvell,orion-mdio");

lib/Kconfig

@@ -1049,6 +1049,7 @@ config SMBIOS
 	bool "SMBIOS support"
 	depends on X86 || EFI_LOADER
 	default y
+	select LAST_STAGE_INIT
 	help
 	  Indicates that this platform can support System Management BIOS
 	  (SMBIOS) tables. These provide various pieces of information about

lib/efi_loader/Makefile

@@ -79,7 +79,7 @@ obj-$(CONFIG_VIDEO) += efi_gop.o
 obj-$(CONFIG_BLK) += efi_disk.o
 obj-$(CONFIG_NETDEVICES) += efi_net.o
 obj-$(CONFIG_ACPI) += efi_acpi.o
-obj-$(CONFIG_GENERATE_SMBIOS_TABLE) += efi_smbios.o
+obj-$(CONFIG_SMBIOS) += efi_smbios.o
 obj-$(CONFIG_EFI_RNG_PROTOCOL) += efi_rng.o
 obj-$(CONFIG_EFI_TCG2_PROTOCOL) += efi_tcg2.o
 obj-$(CONFIG_EFI_RISCV_BOOT_PROTOCOL) += efi_riscv.o

lib/efi_loader/efi_setup.c

@@ -326,11 +326,11 @@ efi_status_t efi_init_obj_list(void)
 		if (ret != EFI_SUCCESS)
 			goto out;
 	}
-#ifdef CONFIG_GENERATE_SMBIOS_TABLE
+	if (IS_ENABLED(CONFIG_SMBIOS)) {
 		ret = efi_smbios_register();
 		if (ret != EFI_SUCCESS)
 			goto out;
-#endif
+	}
 	ret = efi_watchdog_register();
 	if (ret != EFI_SUCCESS)
 		goto out;

lib/efi_loader/efi_smbios.c

@@ -10,8 +10,14 @@
 #include <common.h>
 #include <efi_loader.h>
 #include <log.h>
+#include <malloc.h>
 #include <mapmem.h>
 #include <smbios.h>
+#include <linux/sizes.h>
+
+enum {
+	TABLE_SIZE	= SZ_4K,
+};
 
 /*
  * Install the SMBIOS table as a configuration table.
@@ -20,36 +26,50 @@
  */
 efi_status_t efi_smbios_register(void)
 {
-	/* Map within the low 32 bits, to allow for 32bit SMBIOS tables */
-	u64 dmi_addr = U32_MAX;
+	ulong addr;
 	efi_status_t ret;
-	void *dmi;
 
-	/* Reserve 4kiB page for SMBIOS */
-	ret = efi_allocate_pages(EFI_ALLOCATE_MAX_ADDRESS,
-				 EFI_RUNTIME_SERVICES_DATA, 1, &dmi_addr);
+	addr = gd->arch.smbios_start;
+	if (!addr) {
+		log_err("No SMBIOS tables to install\n");
+		return EFI_NOT_FOUND;
+	}
 
-	if (ret != EFI_SUCCESS) {
-		/* Could not find space in lowmem, use highmem instead */
-		ret = efi_allocate_pages(EFI_ALLOCATE_ANY_PAGES,
-					 EFI_RUNTIME_SERVICES_DATA, 1,
-					 &dmi_addr);
-
-		if (ret != EFI_SUCCESS)
+	/* Mark space used for tables */
+	ret = efi_add_memory_map(addr, TABLE_SIZE, EFI_RUNTIME_SERVICES_DATA);
+	if (ret)
 		return ret;
+
+	log_debug("EFI using SMBIOS tables at %lx\n", addr);
+
+	/* Install SMBIOS information as configuration table */
+	return efi_install_configuration_table(&smbios_guid,
+					       map_sysmem(addr, 0));
 }
 
-	/*
-	 * Generate SMBIOS tables - we know that efi_allocate_pages() returns
-	 * a 4k-aligned address, so it is safe to assume that
-	 * write_smbios_table() will write the table at that address.
-	 */
-	assert(!(dmi_addr & 0xf));
-	dmi = (void *)(uintptr_t)dmi_addr;
-	if (write_smbios_table(map_to_sysmem(dmi)))
-		/* Install SMBIOS information as configuration table */
-		return efi_install_configuration_table(&smbios_guid, dmi);
-	efi_free_pages(dmi_addr, 1);
-	log_err("Cannot create SMBIOS table\n");
-	return EFI_SUCCESS;
+static int install_smbios_table(void)
+{
+	ulong addr;
+	void *buf;
+
+	if (!IS_ENABLED(CONFIG_GENERATE_SMBIOS_TABLE) || IS_ENABLED(CONFIG_X86))
+		return 0;
+
+	/* Align the table to a 4KB boundary to keep EFI happy */
+	buf = memalign(SZ_4K, TABLE_SIZE);
+	if (!buf)
+		return log_msg_ret("mem", -ENOMEM);
+
+	addr = map_to_sysmem(buf);
+	if (!write_smbios_table(addr)) {
+		log_err("Failed to write SMBIOS table\n");
+		return log_msg_ret("smbios", -EINVAL);
 	}
+
+	/* Make a note of where we put it */
+	log_debug("SMBIOS tables written to %lx\n", addr);
+	gd->arch.smbios_start = addr;
+
+	return 0;
+}
+EVENT_SPY_SIMPLE(EVT_LAST_STAGE_INIT, install_smbios_table);

test/py/tests/test_event_dump.py

@@ -18,6 +18,7 @@ def test_event_dump(u_boot_console):
 --------------------  ------------------------------  ------------------------------
 EVT_FT_FIXUP          bootmeth_vbe_ft_fixup           .*boot/vbe_request.c:.*
 EVT_FT_FIXUP          bootmeth_vbe_simple_ft_fixup    .*boot/vbe_simple_os.c:.*
+EVT_LAST_STAGE_INIT   install_smbios_table            .*lib/efi_loader/efi_smbios.c:.*
 EVT_MISC_INIT_F       sandbox_early_getopt_check      .*arch/sandbox/cpu/start.c:.*
 EVT_TEST              h_adder_simple                  .*test/common/event.c:'''
     assert re.match(expect, out, re.MULTILINE) is not None