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Disable EC jump after RW image starts

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TEST=Built and booted Peppy. Ran flashrom from user space and
verified the EC firmware was updated after reboot.

CQ-DEPEND=CL:172651, CL:172652, CL:178324
BRANCH=none
BUG=chromium:325286
Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Change-Id: Ia73da70dbf3abb5ced48666e86715c8d24a431a0
Reviewed-on: https://chromium-review.googlesource.com/172635
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Tested-by: Daisuke Nojiri <dnojiri@google.com>
Commit-Queue: Daisuke Nojiri <dnojiri@google.com>
This commit is contained in:
Daisuke Nojiri
2013-10-10 11:51:45 -07:00
committed by chrome-internal-fetch
parent a3d70a3d2b
commit 8912169231
4 changed files with 17 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
firmware/include/vboot_api.h
View File

@@ -752,11 +752,10 @@ VbError_t VbExEcRunningRW(int *in_rw);
VbError_t VbExEcJumpToRW(void);
/**
* Tell the EC to stay in RO code until it reboots. Subsequent calls to
* VbExEcJumpToRW() this boot will fail. Fails if the EC is not currently in
* RO code.
* Tell the EC to refuse another jump until it reboots. Subsequent calls to
* VbExEcJumpToRW() in this boot will fail.
*/
VbError_t VbExEcStayInRO(void);
VbError_t VbExEcDisableJump(void);
/**
* Read the SHA-256 hash of the rewriteable EC image.

13
firmware/lib/vboot_api_kernel.c
View File

@@ -615,10 +615,10 @@ VbError_t VbEcSoftwareSync(VbCommonParams *cparams)
if (rv != VBERROR_SUCCESS)
return rv;
rv = VbExEcStayInRO();
rv = VbExEcDisableJump();
if (rv != VBERROR_SUCCESS) {
VBDEBUG(("VbEcSoftwareSync() - "
"VbExEcStayInRO() returned %d\n", rv));
"VbExEcDisableJump() returned %d\n", rv));
VbSetRecoveryRequest(VBNV_RECOVERY_EC_SOFTWARE_SYNC);
return VBERROR_EC_REBOOT_TO_RO_REQUIRED;
}
@@ -803,6 +803,15 @@ VbError_t VbEcSoftwareSync(VbCommonParams *cparams)
VbSetRecoveryRequest(VBNV_RECOVERY_EC_JUMP_RW);
return VBERROR_EC_REBOOT_TO_RO_REQUIRED;
}
VBDEBUG(("VbEcSoftwareSync() jumped to EC-RW\n"));
rv = VbExEcDisableJump();
if (rv != VBERROR_SUCCESS) {
VBDEBUG(("VbEcSoftwareSync() - "
"VbExEcDisableJump() returned %d\n", rv));
VbSetRecoveryRequest(VBNV_RECOVERY_EC_SOFTWARE_SYNC);
return VBERROR_EC_REBOOT_TO_RO_REQUIRED;
}
VBDEBUG(("VbEcSoftwareSync() in RW; done\n"));
return VBERROR_SUCCESS;

2
firmware/stub/vboot_api_stub.c
View File

@@ -91,7 +91,7 @@ VbError_t VbExEcRebootToRO(void)
return VBERROR_UNKNOWN;
}
VbError_t VbExEcStayInRO(void)
VbError_t VbExEcDisableJump(void)
{
return VBERROR_SUCCESS;
}

5
tests/vboot_api_kernel3_tests.c
View File

@@ -74,7 +74,7 @@ static void ResetMocks(void)
trust_ec = 0;
mock_in_rw = 0;
ec_protected = 0;
ec_run_image = -1; /* 0 = RO, 1 = RW */
ec_run_image = 0; /* 0 = RO, 1 = RW */
ec_updated = 0;
in_rw_retval = VBERROR_SUCCESS;
protect_retval = VBERROR_SUCCESS;
@@ -129,9 +129,8 @@ VbError_t VbExEcProtectRW(void)
return protect_retval;
}
VbError_t VbExEcStayInRO(void)
VbError_t VbExEcDisableJump(void)
{
ec_run_image = 0;
return run_retval;
}