2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2018 Andrew Turner
7 * This software was developed by SRI International and the University of
8 * Cambridge Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
9 * ("CTSRD"), as part of the DARPA CRASH research programme.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #include "opt_platform.h"
35 #include <sys/cdefs.h>
36 #include <sys/param.h>
37 #include <sys/kernel.h>
39 #include <sys/systm.h>
41 #include <machine/cpu.h>
43 #include <dev/psci/smccc.h>
45 typedef void (cpu_quirk_install)(void);
47 cpu_quirk_install *quirk_install;
56 } ssbd_method = SSBD_KERNEL;
58 static cpu_quirk_install install_psci_bp_hardening;
59 static cpu_quirk_install install_ssbd_workaround;
60 static cpu_quirk_install install_thunderx_bcast_tlbi_workaround;
62 static struct cpu_quirks cpu_quirks[] = {
64 .midr_mask = CPU_IMPL_MASK | CPU_PART_MASK,
65 .midr_value = CPU_ID_RAW(CPU_IMPL_ARM, CPU_PART_CORTEX_A57,0,0),
66 .quirk_install = install_psci_bp_hardening,
69 .midr_mask = CPU_IMPL_MASK | CPU_PART_MASK,
70 .midr_value = CPU_ID_RAW(CPU_IMPL_ARM, CPU_PART_CORTEX_A72,0,0),
71 .quirk_install = install_psci_bp_hardening,
74 .midr_mask = CPU_IMPL_MASK | CPU_PART_MASK,
75 .midr_value = CPU_ID_RAW(CPU_IMPL_ARM, CPU_PART_CORTEX_A73,0,0),
76 .quirk_install = install_psci_bp_hardening,
79 .midr_mask = CPU_IMPL_MASK | CPU_PART_MASK,
80 .midr_value = CPU_ID_RAW(CPU_IMPL_ARM, CPU_PART_CORTEX_A75,0,0),
81 .quirk_install = install_psci_bp_hardening,
84 .midr_mask = CPU_IMPL_MASK | CPU_PART_MASK,
86 CPU_ID_RAW(CPU_IMPL_CAVIUM, CPU_PART_THUNDERX2, 0,0),
87 .quirk_install = install_psci_bp_hardening,
92 .quirk_install = install_ssbd_workaround,
95 .midr_mask = CPU_IMPL_MASK | CPU_PART_MASK,
97 CPU_ID_RAW(CPU_IMPL_CAVIUM, CPU_PART_THUNDERX, 0, 0),
98 .quirk_install = install_thunderx_bcast_tlbi_workaround,
101 .midr_mask = CPU_IMPL_MASK | CPU_PART_MASK,
103 CPU_ID_RAW(CPU_IMPL_CAVIUM, CPU_PART_THUNDERX_81XX, 0, 0),
104 .quirk_install = install_thunderx_bcast_tlbi_workaround,
109 install_psci_bp_hardening(void)
112 if (smccc_arch_features(SMCCC_ARCH_WORKAROUND_1) != SMCCC_RET_SUCCESS)
115 PCPU_SET(bp_harden, smccc_arch_workaround_1);
119 install_ssbd_workaround(void)
123 if (PCPU_GET(cpuid) == 0) {
124 env = kern_getenv("kern.cfg.ssbd");
126 if (strcmp(env, "force-on") == 0) {
127 ssbd_method = SSBD_FORCE_ON;
128 } else if (strcmp(env, "force-off") == 0) {
129 ssbd_method = SSBD_FORCE_OFF;
134 /* Enable the workaround on this CPU if it's enabled in the firmware */
135 if (smccc_arch_features(SMCCC_ARCH_WORKAROUND_2) != SMCCC_RET_SUCCESS)
138 switch(ssbd_method) {
140 smccc_arch_workaround_2(1);
143 smccc_arch_workaround_2(0);
147 PCPU_SET(ssbd, smccc_arch_workaround_2);
153 * Workaround Cavium erratum 27456.
155 * Invalidate the local icache when changing address spaces.
158 install_thunderx_bcast_tlbi_workaround(void)
163 if (CPU_PART(midr) == CPU_PART_THUNDERX_81XX)
164 PCPU_SET(bcast_tlbi_workaround, 1);
165 else if (CPU_PART(midr) == CPU_PART_THUNDERX) {
166 if (CPU_VAR(midr) == 0) {
168 PCPU_SET(bcast_tlbi_workaround, 1);
169 } else if (CPU_VAR(midr) == 1 && CPU_REV(midr) <= 1) {
170 /* ThunderX 2.0 - 2.1 */
171 PCPU_SET(bcast_tlbi_workaround, 1);
177 install_cpu_errata(void)
184 for (i = 0; i < nitems(cpu_quirks); i++) {
185 if ((midr & cpu_quirks[i].midr_mask) ==
186 cpu_quirks[i].midr_value) {
187 cpu_quirks[i].quirk_install();