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efi_loader: add EFI_TCG2_PROTOCOL.SubmitCommand

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This commit adds the EFI_TCG2_PROTOCOL.SubmitCommand
required in the TCG PC Client PFP spec.
SubmitCommand enables to send the raw command to the TPM device.

To implement this api, tpm2_submit_command() is added
into tpm-v2.c.

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Masahisa Kojima 2021-11-04 22:59:16 +09:00 • committed by Heinrich Schuchardt
parent 14cbb330fe
commit 7fc93cae49
3 changed files with 51 additions and 6 deletions
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13
include/tpm-v2.h
View file

@ -641,4 +641,17 @@ u32 tpm2_write_lock(struct udevice *dev, u32 index);
*/ */
u32 tpm2_disable_platform_hierarchy(struct udevice *dev); u32 tpm2_disable_platform_hierarchy(struct udevice *dev);
/**
* submit user specified data to the TPM and get response
*
* @dev TPM device
* @sendbuf: Buffer of the data to send
* @recvbuf: Buffer to save the response to
* @recv_size: Pointer to the size of the response buffer
*
* @return code of the operation
*/
u32 tpm2_submit_command(struct udevice *dev, const u8 *sendbuf,
u8 *recvbuf, size_t *recv_size);
#endif /* __TPM_V2_H */ #endif /* __TPM_V2_H */

38
lib/efi_loader/efi_tcg2.c
View file

@ -1034,13 +1034,39 @@ out:
* Return: status code * Return: status code
*/ */
static efi_status_t EFIAPI static efi_status_t EFIAPI
efi_tcg2_submit_command(__maybe_unused struct efi_tcg2_protocol *this, efi_tcg2_submit_command(struct efi_tcg2_protocol *this,
u32 __maybe_unused input_param_block_size, u32 input_param_block_size,
u8 __maybe_unused *input_param_block, u8 *input_param_block,
u32 __maybe_unused output_param_block_size, u32 output_param_block_size,
u8 __maybe_unused *output_param_block) u8 *output_param_block)
{ {
return EFI_UNSUPPORTED; struct udevice *dev;
efi_status_t ret;
u32 rc;
size_t resp_buf_size = output_param_block_size;
EFI_ENTRY("%p, %u, %p, %u, %p", this, input_param_block_size,
input_param_block, output_param_block_size, output_param_block);
if (!this || !input_param_block || !input_param_block_size) {
ret = EFI_INVALID_PARAMETER;
goto out;
}
ret = platform_get_tpm2_device(&dev);
if (ret != EFI_SUCCESS)
goto out;
rc = tpm2_submit_command(dev, input_param_block,
output_param_block, &resp_buf_size);
if (rc) {
ret = (rc == -ENOSPC) ? EFI_OUT_OF_RESOURCES : EFI_DEVICE_ERROR;
goto out;
}
out:
return EFI_EXIT(ret);
} }
/** /**

6
lib/tpm-v2.c
View file

@ -659,3 +659,9 @@ u32 tpm2_disable_platform_hierarchy(struct udevice *dev)
return 0; return 0;
} }
u32 tpm2_submit_command(struct udevice *dev, const u8 *sendbuf,
u8 *recvbuf, size_t *recv_size)
{
return tpm_sendrecv_command(dev, sendbuf, recvbuf, recv_size);
}