From: Simon Glass <sjg@chromium.org>
Date: Sun, 31 Dec 2023 15:25:55 +0000 (-0700)
Subject: efi: Correct smbios-table installation
X-Git-Url: http://git.dujemihanovic.xyz/img/sics.gif?a=commitdiff_plain;h=06ef8089f876b6dabf56caba31a05c003f03c629;p=u-boot.git

efi: Correct smbios-table installation

At present this code allocates memory when writing the tables and
then unnecessarily adds another memory map when installing it.

Adjust the code to allocate the tables using the normal U-Boot
mechanism. This avoids doing an EFI memory allocation early in
U-Boot, which may use memory that would be overwritten by a
'load' command, for example.

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

diff --git a/lib/efi_loader/efi_smbios.c b/lib/efi_loader/efi_smbios.c
index 5db342ee0d..eb6d2ba43c 100644
--- a/lib/efi_loader/efi_smbios.c
+++ b/lib/efi_loader/efi_smbios.c
@@ -54,27 +54,25 @@ efi_status_t efi_smbios_register(void)
 
 static int install_smbios_table(void)
 {
-	u64 addr;
-	efi_status_t ret;
+	ulong addr;
+	void *buf;
 
 	if (!IS_ENABLED(CONFIG_GENERATE_SMBIOS_TABLE) || IS_ENABLED(CONFIG_X86))
 		return 0;
 
-	addr = SZ_4G;
-	ret = efi_allocate_pages(EFI_ALLOCATE_MAX_ADDRESS,
-				 EFI_RUNTIME_SERVICES_DATA,
-				 efi_size_in_pages(TABLE_SIZE), &addr);
-	if (ret != EFI_SUCCESS)
+	/* 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((void *)(uintptr_t)addr);
+	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 %llx\n", addr);
+	log_debug("SMBIOS tables written to %lx\n", addr);
 	gd->arch.smbios_start = addr;
 
 	return 0;