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efi: app: Detect running under QEMU

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When the app is running under QEMU we may wish to do some things
differently. Add a flag for this and use the SMBIOS tables to detect it.

Co-developed-by: Claude <noreply@anthropic.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2025-10-05 14:14:30 -06:00
parent 6d5dc5ea55
commit 02fa448bcc
2 changed files with 30 additions and 1 deletions
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25
lib/efi_client/efi_app.c
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@@ -22,6 +22,7 @@
#include <image.h>
#include <init.h>
#include <malloc.h>
#include <smbios.h>
#include <sysreset.h>
#include <u-boot/uuid.h>
#include <asm/global_data.h>
@@ -179,6 +180,27 @@ static void scan_tables(struct efi_system_table *sys_table)
}
}
static bool detect_emulator(void)
{
struct smbios_info info;
struct smbios_type1 *t1;
const char *manufacturer;
/* Check if running in QEMU by looking at SMBIOS manufacturer */
if (!smbios_locate(gd_smbios_start(), &info)) {
t1 = (void *)smbios_get_header(&info,
SMBIOS_SYSTEM_INFORMATION);
if (t1) {
manufacturer = smbios_get_string(&t1->hdr,
t1->manufacturer);
if (manufacturer && !strcmp(manufacturer, "QEMU"))
return true;
}
}
return false;
}
static void find_protocols(struct efi_priv *priv)
{
efi_guid_t guid = EFI_DEVICE_PATH_TO_TEXT_PROTOCOL_GUID;
@@ -415,7 +437,8 @@ efi_status_t EFIAPI efi_main(efi_handle_t image,
printf("starting\n");
board_init_f(GD_FLG_SKIP_RELOC);
board_init_f(GD_FLG_SKIP_RELOC |
(detect_emulator() ? GD_FLG_EMUL : 0));
gd = gd->new_gd;
board_init_r(NULL, 0);
free_memory(priv);