From adfbbde7c99a13ba69abf1e7123453f4db513e53 Mon Sep 17 00:00:00 2001 From: Vadim Bendebury Date: Sun, 3 Jul 2016 15:56:41 -0700 Subject: tpm2: add tlcl_force_clear and use it before factory init tlcl_force_clear() needs to be issued each time when the device mode switches between normal/development/recovery. This patch adds command implementation using TPM_Clear TPM2 command, and also invokes it before factory initialization. BRANCH=none BUG=chrome-os-partner:50645 TEST=verified that TPM_Clear command succeeds at factory startup and the boot proceeds normally. Change-Id: Ia431390870cbe448bc1b6f1755ed17953be9bdf1 Signed-off-by: Martin Roth Original-Commit-Id: 347ff17b97da45fa4df547ff32f9dd2c8972cefd Original-Change-Id: I2a0e62527ad46f9dd060afe5e75c7e4d56752849 Original-Signed-off-by: Vadim Bendebury Original-Reviewed-on: https://chromium-review.googlesource.com/358095 Original-Reviewed-by: Aaron Durbin Original-Reviewed-by: Darren Krahn Reviewed-on: https://review.coreboot.org/15636 Tested-by: build bot (Jenkins) Reviewed-by: Philipp Deppenwiese --- src/lib/tpm2_tlcl.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'src/lib') diff --git a/src/lib/tpm2_tlcl.c b/src/lib/tpm2_tlcl.c index 8412ed0784..ec20ca9446 100644 --- a/src/lib/tpm2_tlcl.c +++ b/src/lib/tpm2_tlcl.c @@ -81,7 +81,15 @@ uint32_t tlcl_finalize_physical_presence(void) uint32_t tlcl_force_clear(void) { - printk(BIOS_INFO, "%s:%s:%d\n", __FILE__, __func__, __LINE__); + struct tpm2_response *response; + + response = tpm_process_command(TPM2_Clear, NULL); + printk(BIOS_INFO, "%s: response is %x\n", + __func__, response ? response->hdr.tpm_code : -1); + + if (!response || response->hdr.tpm_code) + return TPM_E_IOERROR; + return TPM_SUCCESS; } -- cgit v1.2.3