[PATCH v5 15/20] efi: Use the installed SMBIOS tables
Simon Glass
sjg at chromium.org
Wed Sep 20 05:00:16 CEST 2023
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 at chromium.org>
---
(no changes since v4)
Changes in v4:
- Rewrite this to use events instead
Changes in v3:
- Use log_debug() to show the message
- Squash in the next patch
Changes in v2:
- Add new patch
lib/Kconfig | 1 +
lib/efi_loader/Makefile | 2 +-
lib/efi_loader/efi_setup.c | 10 ++---
lib/efi_loader/efi_smbios.c | 72 ++++++++++++++++++++------------
test/py/tests/test_event_dump.py | 1 +
5 files changed, 54 insertions(+), 32 deletions(-)
diff --git a/lib/Kconfig b/lib/Kconfig
index 6b5389f3a87d..79cf9ef0fa31 100644
--- a/lib/Kconfig
+++ b/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
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..48446f654d9b 100644
--- a/lib/efi_loader/efi_smbios.c
+++ b/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;
+ }
+
+ /* 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));
+}
+
+static int install_smbios_table(void)
+{
+ ulong addr;
+ void *buf;
- 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 (!IS_ENABLED(CONFIG_GENERATE_SMBIOS_TABLE) || IS_ENABLED(CONFIG_X86))
+ return 0;
- if (ret != EFI_SUCCESS)
- return ret;
+ /* 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);
}
- /*
- * 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;
+ /* 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);
diff --git a/test/py/tests/test_event_dump.py b/test/py/tests/test_event_dump.py
index a6df9e10e54e..e282c67335cd 100644
--- a/test/py/tests/test_event_dump.py
+++ b/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
--
2.42.0.459.ge4e396fd5e-goog
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