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138e69149b
EFI does not use the 'anchor string' to determine the SMBIOS table version, instead preferring to have two separate GUIDs. Use the correct one, depending on the table version. Call unmap_system() to balance to the use of map_sysmem() Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
84 lines
1.8 KiB
C
84 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* EFI application tables support
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*
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* Copyright (c) 2016 Alexander Graf
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*/
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#define LOG_CATEGORY LOGC_EFI
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#include <efi_loader.h>
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#include <log.h>
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#include <malloc.h>
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#include <mapmem.h>
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#include <smbios.h>
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#include <linux/sizes.h>
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const efi_guid_t smbios3_guid = SMBIOS3_TABLE_GUID;
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enum {
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TABLE_SIZE = SZ_4K,
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};
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/*
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* Install the SMBIOS table as a configuration table.
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*
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* Return: status code
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*/
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efi_status_t efi_smbios_register(void)
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{
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const efi_guid_t *guid;
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ulong addr;
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efi_status_t ret;
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void *buf;
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addr = gd_smbios_start();
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if (!addr) {
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log_err("No SMBIOS tables to install\n");
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return EFI_NOT_FOUND;
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}
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/* Mark space used for tables */
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ret = efi_add_memory_map(addr, TABLE_SIZE, EFI_RUNTIME_SERVICES_DATA);
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if (ret)
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return ret;
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log_debug("EFI using SMBIOS tables at %lx\n", addr);
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/* Install SMBIOS information as configuration table */
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buf = map_sysmem(addr, 0);
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guid = !memcmp(buf, "_SM_", 4) ? &smbios_guid : &smbios3_guid;
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ret = efi_install_configuration_table(guid, buf);
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unmap_sysmem(buf);
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return ret;
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}
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static int install_smbios_table(void)
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{
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u64 addr;
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efi_status_t ret;
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if (!IS_ENABLED(CONFIG_GENERATE_SMBIOS_TABLE) || IS_ENABLED(CONFIG_X86))
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return 0;
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addr = SZ_4G;
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ret = efi_allocate_pages(EFI_ALLOCATE_MAX_ADDRESS,
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EFI_RUNTIME_SERVICES_DATA,
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efi_size_in_pages(TABLE_SIZE), &addr);
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if (ret != EFI_SUCCESS)
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return log_msg_ret("mem", -ENOMEM);
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addr = map_to_sysmem((void *)(uintptr_t)addr);
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if (!write_smbios_table(addr)) {
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log_err("Failed to write SMBIOS table\n");
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return log_msg_ret("smbios", -EINVAL);
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}
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/* Make a note of where we put it */
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log_debug("SMBIOS tables written to %llx\n", addr);
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gd->arch.smbios_start = addr;
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return 0;
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}
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EVENT_SPY_SIMPLE(EVT_LAST_STAGE_INIT, install_smbios_table);
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