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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/usr/secureboot/base/settings.C $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2013,2017 */
/* [+] International Business Machines Corp. */
/* */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
#include <errl/errlentry.H>
#include <errl/errlmanager.H>
#include <devicefw/userif.H>
#include <secureboot/service.H>
#include <secureboot/secure_reasoncodes.H>
#include <targeting/common/util.H>
#include <targeting/common/target.H>
#include <initservice/initserviceif.H>
#include <secureboot/settings.H>
// SECUREBOOT : General driver traces
#include "../common/securetrace.H"
namespace SECUREBOOT
{
using namespace TARGETING;
using namespace ERRORLOG;
// symbolic constant for the trace size
enum {
ERROR_TRACE_SIZE = 256,
};
void Settings::_init()
{
uint64_t l_regValue = 0;
// read security switch register
auto l_errl = getSecuritySwitch(l_regValue,
MASTER_PROCESSOR_CHIP_TARGET_SENTINEL);
if (NULL != l_errl)
{
// Grab errlog reason code before committing.
uint16_t l_rc = l_errl->reasonCode();
errlCommit(l_errl, SECURE_COMP_ID);
// we need to shutdown here because getSecuritySwitch does not
// return a fatal error log in some cases
INITSERVICE::doShutdown(l_rc);
}
// cache only the enabled flag
iv_enabled = (0 != (l_regValue &
static_cast<uint64_t>(ProcSecurity::SabBit)));
SB_INF("getEnabled() state:%i",iv_enabled);
}
bool Settings::getEnabled() const
{
return iv_enabled;
}
errlHndl_t Settings::getJumperState(SecureJumperState& o_state,
Target* i_targ) const
{
uint64_t l_regValue = 0;
o_state = SecureJumperState::SECURITY_DEASSERTED;
errlHndl_t l_errl = nullptr;
do
{
// the supplied target input parameter is validated in one place
// inside the readSecurityRegister function
l_errl = readSecurityRegister(i_targ,
static_cast<uint64_t>(ProcCbsControl::StatusRegister),
l_regValue);
SB_DBG("getJumperState() err:%i reg:%.16llX huid:%.8X",
!!l_errl, l_regValue, get_huid(i_targ));
if (l_errl)
{
break;
}
o_state = (l_regValue &
static_cast<uint64_t>(ProcCbsControl::JumperStateBit)) ?
SecureJumperState::SECURITY_ASSERTED :
SecureJumperState::SECURITY_DEASSERTED;
SB_INF("getJumperState() state:%i huid:%.8X", o_state,
get_huid(i_targ));
} while(0);
return l_errl;
}
errlHndl_t Settings::getSecuritySwitch(uint64_t& o_regValue,
Target* i_targ) const
{
auto l_errl = readSecurityRegister(i_targ,
static_cast<uint64_t>(ProcSecurity::SwitchRegister),
o_regValue);
SB_INF("getSecuritySwitch() err:%i reg:%.16llX huid:%.8X",
!!l_errl, o_regValue, get_huid(i_targ));
return l_errl;
}
errlHndl_t Settings::readSecurityRegister(Target* i_targ,
const uint64_t i_scomAddress,
uint64_t& o_regValue) const
{
errlHndl_t l_errl = nullptr;
size_t size = sizeof(o_regValue);
do
{
// make sure we are not passed a null target pointer or the wrong
// target type (must be a processor target) or the sentinel
if ( i_targ != MASTER_PROCESSOR_CHIP_TARGET_SENTINEL &&
(i_targ == nullptr || i_targ->getAttr<ATTR_TYPE>() != TYPE_PROC)
)
{
/*@
* @errortype
* @moduleid SECUREBOOT::MOD_SECURE_READ_REG
* @reasoncode SECUREBOOT::RC_SECURE_BAD_TARGET
* @userdata1 Target pointer value
* @userdata2 Target's HUID or 0 if null
* target pointer.
* @devdesc Invalid target used to read security
* switch register.
* @custdesc Internal Firmware error.
*/
l_errl = new ERRORLOG::ErrlEntry(ERRORLOG::ERRL_SEV_UNRECOVERABLE,
SECUREBOOT::MOD_SECURE_READ_REG,
SECUREBOOT::RC_SECURE_BAD_TARGET,
reinterpret_cast<uint64_t>(i_targ),
TO_UINT64(get_huid(i_targ)),
true /* Add HB Software Callout */ );
l_errl->collectTrace(SECURE_COMP_NAME, ERROR_TRACE_SIZE);
break;
}
// Read security switch setting from processor.
l_errl = deviceRead(i_targ,
&o_regValue, size,
DEVICE_SCOM_ADDRESS(i_scomAddress));
if (nullptr != l_errl)
{
break;
}
assert(size == sizeof(o_regValue),
"size returned from device read is not the expected size of %i",
sizeof(o_regValue));
} while(0);
return l_errl;
}
}
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