/*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2018 Andrew Turner * * This software was developed by SRI International and the University of * Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237 * ("CTSRD"), as part of the DARPA CRASH research programme. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include "opt_acpi.h" #include "opt_platform.h" #include #include #include #include #include #include #define SMCCC_VERSION_1_0 0x10000 /* Assume 1.0 until we detect a later version */ static uint32_t smccc_version = SMCCC_VERSION_1_0; void smccc_init(void) { int32_t features; uint32_t ret; features = psci_features(SMCCC_VERSION); if (features != PSCI_RETVAL_NOT_SUPPORTED) { ret = psci_call(SMCCC_VERSION, 0, 0, 0); /* This should always be the case as we checked it above */ if (ret > 0) smccc_version = ret; } if (bootverbose) { printf("Found SMCCC version %u.%u\n", SMCCC_VERSION_MAJOR(smccc_version), SMCCC_VERSION_MINOR(smccc_version)); } } uint32_t smccc_get_version(void) { return (smccc_version); } int32_t smccc_arch_features(uint32_t smccc_func_id) { if (smccc_version == SMCCC_VERSION_1_0) return (PSCI_RETVAL_NOT_SUPPORTED); return (psci_call(SMCCC_ARCH_FEATURES, smccc_func_id, 0, 0)); } /* * The SMCCC handler for Spectre variant 2: Branch target injection. * (CVE-2017-5715) */ int smccc_arch_workaround_1(void) { KASSERT(smccc_version != SMCCC_VERSION_1_0, ("SMCCC arch workaround 1 called with an invalid SMCCC interface")); return (psci_call(SMCCC_ARCH_WORKAROUND_1, 0, 0, 0)); } int smccc_arch_workaround_2(int enable) { KASSERT(smccc_version != SMCCC_VERSION_1_0, ("SMCCC arch workaround 2 called with an invalid SMCCC interface")); return (psci_call(SMCCC_ARCH_WORKAROUND_2, enable, 0, 0)); }