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TPM2: Fill in empty tlcl_resume function in TPM2 tlcl 

On resume, TPM2_Starup(STATE) command needs to be sent to the TPM. This
ensures that TPM restores the state saved at last Shutdown(STATE).

Since tlcl_resume and tlcl_startup both use the same sequence for
sending startup command with different arguments, add a common function
that can be used by both.

BUG=chrome-os-partner:58043
BRANCH=None
TEST=Verified that on resume coreboot no longer complains about index
read for 0x1007. Return value is 0 as expected.

Change-Id: Ib8640acc9cc9cdb3ba5d40e0ccee5ca7d67fa645
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/16832
Tested-by: build bot (Jenkins)
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
This commit is contained in:
Furquan Shaikh 2016-09-30 12:53:19 -07:00 committed by Martin Roth
parent 5db043f0d6
commit cc3365a039
1 changed files with 20 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
src/lib/tpm2_tlcl.c
View File

@ -54,10 +54,27 @@ uint32_t tlcl_get_permanent_flags(TPM_PERMANENT_FLAGS *pflags)
return TPM_SUCCESS;
}
static uint32_t tlcl_send_startup(TPM_SU type)
{
struct tpm2_startup startup;
struct tpm2_response *response;
startup.startup_type = type;
response = tpm_process_command(TPM2_Startup, &startup);
if (response && response->hdr.tpm_code &&
(response->hdr.tpm_code != TPM_RC_INITIALIZE)) {
printk(BIOS_INFO, "%s: Startup return code is %x\n",
__func__, response->hdr.tpm_code);
return TPM_E_IOERROR;
}
return TPM_SUCCESS;
}
uint32_t tlcl_resume(void)
{
printk(BIOS_INFO, "%s:%s:%d\n", __FILE__, __func__, __LINE__);
return TPM_SUCCESS;
return tlcl_send_startup(TPM_SU_STATE);
}
uint32_t tlcl_assert_physical_presence(void)
@ -245,18 +262,7 @@ uint32_t tlcl_lock_nv_write(uint32_t index)
uint32_t tlcl_startup(void)
{
struct tpm2_startup startup;
struct tpm2_response *response;
startup.startup_type = TPM_SU_CLEAR;
response = tpm_process_command(TPM2_Startup, &startup);
if (response && response->hdr.tpm_code &&
(response->hdr.tpm_code != TPM_RC_INITIALIZE)) {
printk(BIOS_INFO, "startup return code is %x\n",
response->hdr.tpm_code);
return TPM_E_IOERROR;
}
return TPM_SUCCESS;
return tlcl_send_startup(TPM_SU_CLEAR);
}
uint32_t tlcl_write(uint32_t index, const void *data, uint32_t length)