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efi_loader: startup the tpm device when installing the protocol

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Due to U-Boot's lazy binding mentality the TPM is probed but not properly
initialized.  The user can startup the device from the command line
e.g 'tpm2 startup TPM2_SU_CLEAR'.  However we can initialize the TPM during
the TCG protocol installation,  which is easier to use overall.

Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Ilias Apalodimas 2021-11-18 10:13:42 +02:00 • committed by Heinrich Schuchardt
parent 5ba0397049
commit d6b55a420c
1 changed files with 9 additions and 0 deletions
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9
lib/efi_loader/efi_tcg2.c
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@ -18,6 +18,7 @@
#include <smbios.h>
#include <version_string.h>
#include <tpm-v2.h>
#include <tpm_api.h>
#include <u-boot/hash-checksum.h>
#include <u-boot/sha1.h>
#include <u-boot/sha256.h>
@ -1943,6 +1944,7 @@ efi_status_t efi_tcg2_register(void)
efi_status_t ret = EFI_SUCCESS;
struct udevice *dev;
struct efi_event *event;
u32 err;
ret = platform_get_tpm2_device(&dev);
if (ret != EFI_SUCCESS) {
@ -1950,6 +1952,13 @@ efi_status_t efi_tcg2_register(void)
return EFI_SUCCESS;
}
/* initialize the TPM as early as possible. */
err = tpm_startup(dev, TPM_ST_CLEAR);
if (err) {
log_err("TPM startup failed\n");
goto fail;
}
ret = efi_init_event_log();
if (ret != EFI_SUCCESS)
goto fail;