diff options
| author | Vadim Bendebury <vbendeb@chromium.org> | 2016-07-03 17:08:10 -0700 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2016-07-14 00:00:14 +0200 |
| commit | 4c0851cc37f42ed88d62b876357b71cfdaac480f (patch) | |
| tree | 096758fe9295f44382e07a5b2856182e5cd0dbd8 /src/vendorcode/google/chromeos | |
| parent | 1ec76030edb631a1d37d6c9ad9d3791795681c11 (diff) | |
tpm2: implement locking firmware rollback counter
TPM1.2 is using the somewhat misnamed tlcl_set_global_lock() command
function to lock the hardware rollback counter. For TPM2 let's
implement and use the TPM2 command to lock an NV Ram location
(TPM2_NV_WriteLock).
BRANCH=none
BUG=chrome-os-partner:50645
TEST=verified that TPM2_NV_WriteLock command is invoked before RO
firmware starts RW, and succeeds.
Change-Id: I52aa8db95b908488ec4cf0843afeb6310dc7f38b
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: 2f859335dfccfeea900f15bbb8c6cb3fd5ec8c77
Original-Change-Id: I62f22b9991522d4309cccc44180a5ebd4dca488d
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/358097
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-by: Darren Krahn <dkrahn@chromium.org>
Reviewed-on: https://review.coreboot.org/15638
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Diffstat (limited to 'src/vendorcode/google/chromeos')
| -rw-r--r-- | src/vendorcode/google/chromeos/vboot2/antirollback.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/src/vendorcode/google/chromeos/vboot2/antirollback.c b/src/vendorcode/google/chromeos/vboot2/antirollback.c index 5b738c4897..a51e5d6d55 100644 --- a/src/vendorcode/google/chromeos/vboot2/antirollback.c +++ b/src/vendorcode/google/chromeos/vboot2/antirollback.c @@ -157,6 +157,11 @@ uint32_t tpm_clear_and_reenable(void) return TPM_SUCCESS; } +uint32_t antirollback_lock_space_firmware(void) +{ + return tlcl_lock_nv_write(FIRMWARE_NV_INDEX); +} + #else uint32_t tpm_clear_and_reenable(void) @@ -263,6 +268,11 @@ static uint32_t _factory_initialize_tpm(struct vb2_context *ctx) VB2_SECDATA_SIZE)); return TPM_SUCCESS; } + +uint32_t antirollback_lock_space_firmware(void) +{ + return tlcl_set_global_lock(); +} #endif uint32_t factory_initialize_tpm(struct vb2_context *ctx) @@ -424,8 +434,3 @@ uint32_t antirollback_write_space_firmware(struct vb2_context *ctx) { return write_secdata(FIRMWARE_NV_INDEX, ctx->secdata, VB2_SECDATA_SIZE); } - -uint32_t antirollback_lock_space_firmware() -{ - return tlcl_set_global_lock(); -} |