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tpm2: add TPM_Clear command processing 

The command is sent in session mode, but has no parameters associated
with it.

BRANCH=none
BUG=chrome-os-partner:50645
TEST=with the following patches verified that TPM_Clear command is
     handled successfully by the TPM.

Change-Id: I3c9151e336084160acd3bb1f36f45b4d5efd4a33
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: 503ad5e72fd5bd902325d74fd680c17c7c590e36
Original-Change-Id: Ida19e75166e1282732810cf45be21e59515d88e2
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/357973
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/15634
Tested-by: build bot (Jenkins)
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@googlemail.com>
This commit is contained in:
Vadim Bendebury 2016-06-30 20:50:49 -07:00 committed by Martin Roth
parent ebba4d7c2f
commit 6acb9a6012
2 changed files with 15 additions and 0 deletions
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14
src/lib/tpm2_marshaling.c
View File

@ -315,6 +315,15 @@ static void marshal_nv_read(void **buffer,
marshal_u16(buffer, command_body->offset, buffer_space);
}
/* TPM2_Clear command does not require paramaters. */
static void marshal_clear(void **buffer, size_t *buffer_space)
{
const uint32_t handle[] = { TPM_RH_PLATFORM };
marshal_common_session_header(buffer, handle,
ARRAY_SIZE(handle), buffer_space);
}
static void marshal_selftest(void **buffer,
struct tpm2_self_test *command_body,
size_t *buffer_space)
@ -359,6 +368,10 @@ int tpm_marshal_command(TPM_CC command, void *tpm_command_body,
marshal_selftest(&cmd_body, tpm_command_body, &body_size);
break;
case TPM2_Clear:
marshal_clear(&cmd_body, &body_size);
break;
default:
body_size = 0;
printk(BIOS_INFO, "%s:%d:Request to marshal unsupported command %#x\n",
@ -517,6 +530,7 @@ struct tpm2_response *tpm_unmarshal_response(TPM_CC command,
&tpm2_resp.nvr);
break;
case TPM2_Clear:
case TPM2_NV_DefineSpace:
case TPM2_NV_Write:
/* Session data included in response can be safely ignored. */

1
src/lib/tpm2_tlcl_structures.h
View File

@ -56,6 +56,7 @@ struct tpm_header {
} __attribute__((packed));
/* TPM command codes. */
#define TPM2_Clear ((TPM_CC)0x00000126)
#define TPM2_NV_DefineSpace ((TPM_CC)0x0000012A)
#define TPM2_NV_Write ((TPM_CC)0x00000137)
#define TPM2_SelfTest ((TPM_CC)0x00000143)