[PATCH v3 14/19] efi: x86: Use the installed SMBIOS tables

[Simon Glass]

U-Boot sets up the SMBIOS tables during startup. Rather than creating a
new set, install the existing ones. Rely on the ACPI table's memory-map
record to cover the tables.

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

Signed-off-by: Simon Glass <sjg at chromium.org>
---

Changes in v3:
- Use log_debug() to show the message
- Squash in the next patch

Changes in v2:
- Add new patch

 lib/efi_loader/Makefile     |  2 +-
 lib/efi_loader/efi_setup.c  | 10 +++++-----
 lib/efi_loader/efi_smbios.c | 37 +++++++------------------------------
 3 files changed, 13 insertions(+), 36 deletions(-)

diff --git a/lib/efi_loader/Makefile b/lib/efi_loader/Makefile
index 0eb748ff1a59..8d31fc61c601 100644
--- a/lib/efi_loader/Makefile
+++ b/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
diff --git a/lib/efi_loader/efi_setup.c b/lib/efi_loader/efi_setup.c
index ad719afd6328..e6de685e8795 100644
--- a/lib/efi_loader/efi_setup.c
+++ b/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
-	ret = efi_smbios_register();
-	if (ret != EFI_SUCCESS)
-		goto out;
-#endif
+	if (IS_ENABLED(CONFIG_SMBIOS)) {
+		ret = efi_smbios_register();
+		if (ret != EFI_SUCCESS)
+			goto out;
+	}
 	ret = efi_watchdog_register();
 	if (ret != EFI_SUCCESS)
 		goto out;
diff --git a/lib/efi_loader/efi_smbios.c b/lib/efi_loader/efi_smbios.c
index 306c0bc54f90..06f62d58dc96 100644
--- a/lib/efi_loader/efi_smbios.c
+++ b/lib/efi_loader/efi_smbios.c
@@ -20,36 +20,13 @@
  */
 efi_status_t efi_smbios_register(void)
 {
-	/* Map within the low 32 bits, to allow for 32bit SMBIOS tables */
-	u64 dmi_addr = U32_MAX;
-	efi_status_t ret;
-	void *dmi;
+	ulong addr;
 
-	/* Reserve 4kiB page for SMBIOS */
-	ret = efi_allocate_pages(EFI_ALLOCATE_MAX_ADDRESS,
-				 EFI_RUNTIME_SERVICES_DATA, 1, &dmi_addr);
+	/* space for all tables is marked in efi_acpi_register() */
+	addr = gd->arch.smbios_start;
+	log_debug("EFI using SMBIOS tables at %lx\n", addr);
 
-	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)
-			return ret;
-	}
-
-	/*
-	 * 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;
+	/* Install SMBIOS information as configuration table */
+	return efi_install_configuration_table(&smbios_guid,
+					       map_sysmem(addr, 0));
 }
-- 
2.42.0.rc1.204.g551eb34607-goog