smbios: error handling for invalid addresses

SMBIOS tables only support 32bit addresses. If we don't have memory here
handle the error gracefully:

* on x86_64 fail to start U-Boot
* during UEFI booting ignore the missing table

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/arch/x86/lib/tables.c b/arch/x86/lib/tables.c
index 1779bb3..ea834a5 100644 (file)
--- a/arch/x86/lib/tables.c
+++ b/arch/x86/lib/tables.c
@@ -3,6 +3,8 @@
  * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
  */
 
+#define LOG_CATEGORY LOGC_BOARD
+
 #include <common.h>
 #include <bloblist.h>
 #include <log.h>
@@ -96,13 +98,20 @@ int write_tables(void)
                                return log_msg_ret("bloblist", -ENOBUFS);
                }
                rom_table_end = table->write(rom_table_start);
-               rom_table_end = ALIGN(rom_table_end, ROM_TABLE_ALIGN);
+               if (!rom_table_end) {
+                       log_err("Can't create configuration table %d\n", i);
+                       return -EINTR;
+               }
 
                if (IS_ENABLED(CONFIG_SEABIOS)) {
                        table_size = rom_table_end - rom_table_start;
                        high_table = (u32)(ulong)high_table_malloc(table_size);
                        if (high_table) {
-                               table->write(high_table);
+                               if (!table->write(high_table)) {
+                                       log_err("Can't create configuration table %d\n",
+                                               i);
+                                       return -EINTR;
+                               }
 
                                cfg_tables[i].start = high_table;
                                cfg_tables[i].size = table_size;

diff --git a/include/smbios.h b/include/smbios.h
index fc49fc1..aa6b6f3 100644 (file)
--- a/include/smbios.h
+++ b/include/smbios.h
@@ -229,8 +229,11 @@ static inline void fill_smbios_header(void *table, int type,
  * This writes SMBIOS table at a given address.
  *
  * @addr:      start address to write SMBIOS table. If this is not
- *     16-byte-aligned then it will be aligned before the table is written
- * @return:    end address of SMBIOS table (and start address for next entry)
+ *             16-byte-aligned then it will be aligned before the table is
+ *             written.
+ * Return:     end address of SMBIOS table (and start address for next entry)
+ *             or NULL in case of an error
+ *
  */
 ulong write_smbios_table(ulong addr);
 

diff --git a/lib/efi_loader/efi_smbios.c b/lib/efi_loader/efi_smbios.c
index 719d3e8..2eb4cb1 100644 (file)
--- a/lib/efi_loader/efi_smbios.c
+++ b/lib/efi_loader/efi_smbios.c
@@ -5,6 +5,8 @@
  *  Copyright (c) 2016 Alexander Graf
  */
 
+#define LOG_CATEGORY LOGC_EFI
+
 #include <common.h>
 #include <efi_loader.h>
 #include <log.h>
@@ -43,14 +45,13 @@ efi_status_t efi_smbios_register(void)
         * 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.
-        *
-        * Note that on sandbox, efi_allocate_pages() unfortunately returns a
-        * pointer even though it uses a uint64_t type. Convert it.
         */
        assert(!(dmi_addr & 0xf));
        dmi = (void *)(uintptr_t)dmi_addr;
-       write_smbios_table(map_to_sysmem(dmi));
-
-       /* And expose them to our EFI payload */
-       return efi_install_configuration_table(&smbios_guid, dmi);
+       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;
 }

diff --git a/lib/smbios.c b/lib/smbios.c
index a892716..d7f4999 100644 (file)
--- a/lib/smbios.c
+++ b/lib/smbios.c
@@ -530,7 +530,8 @@ ulong write_smbios_table(ulong addr)
                 */
                printf("WARNING: SMBIOS table_address overflow %llx\n",
                       (unsigned long long)table_addr);
-               table_addr = 0;
+               addr = 0;
+               goto out;
        }
        se->struct_table_address = table_addr;
 
@@ -541,6 +542,7 @@ ulong write_smbios_table(ulong addr)
        isize = sizeof(struct smbios_entry) - SMBIOS_INTERMEDIATE_OFFSET;
        se->intermediate_checksum = table_compute_checksum(istart, isize);
        se->checksum = table_compute_checksum(se, sizeof(struct smbios_entry));
+out:
        unmap_sysmem(se);
 
        return addr;