From b20732900e4636a467c0183a47f7396700f5f743 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 7 Aug 2024 15:11:22 +0200 Subject: Adding upstream version 6.9.7. Signed-off-by: Daniel Baumann --- arch/x86/kernel/cpu/bugs.c | 50 ++++++++++++++++++++++++++-------------------- 1 file changed, 28 insertions(+), 22 deletions(-) (limited to 'arch/x86/kernel/cpu/bugs.c') diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c index e7ceee008b..ab18185894 100644 --- a/arch/x86/kernel/cpu/bugs.c +++ b/arch/x86/kernel/cpu/bugs.c @@ -56,7 +56,7 @@ EXPORT_SYMBOL_GPL(x86_spec_ctrl_base); /* The current value of the SPEC_CTRL MSR with task-specific bits set */ DEFINE_PER_CPU(u64, x86_spec_ctrl_current); -EXPORT_SYMBOL_GPL(x86_spec_ctrl_current); +EXPORT_PER_CPU_SYMBOL_GPL(x86_spec_ctrl_current); u64 x86_pred_cmd __ro_after_init = PRED_CMD_IBPB; EXPORT_SYMBOL_GPL(x86_pred_cmd); @@ -731,7 +731,7 @@ enum gds_mitigations { GDS_MITIGATION_HYPERVISOR, }; -#if IS_ENABLED(CONFIG_GDS_FORCE_MITIGATION) +#if IS_ENABLED(CONFIG_MITIGATION_GDS_FORCE) static enum gds_mitigations gds_mitigation __ro_after_init = GDS_MITIGATION_FORCE; #else static enum gds_mitigations gds_mitigation __ro_after_init = GDS_MITIGATION_FULL; @@ -1042,10 +1042,10 @@ static void __init retbleed_select_mitigation(void) return; case RETBLEED_CMD_UNRET: - if (IS_ENABLED(CONFIG_CPU_UNRET_ENTRY)) { + if (IS_ENABLED(CONFIG_MITIGATION_UNRET_ENTRY)) { retbleed_mitigation = RETBLEED_MITIGATION_UNRET; } else { - pr_err("WARNING: kernel not compiled with CPU_UNRET_ENTRY.\n"); + pr_err("WARNING: kernel not compiled with MITIGATION_UNRET_ENTRY.\n"); goto do_cmd_auto; } break; @@ -1054,24 +1054,24 @@ static void __init retbleed_select_mitigation(void) if (!boot_cpu_has(X86_FEATURE_IBPB)) { pr_err("WARNING: CPU does not support IBPB.\n"); goto do_cmd_auto; - } else if (IS_ENABLED(CONFIG_CPU_IBPB_ENTRY)) { + } else if (IS_ENABLED(CONFIG_MITIGATION_IBPB_ENTRY)) { retbleed_mitigation = RETBLEED_MITIGATION_IBPB; } else { - pr_err("WARNING: kernel not compiled with CPU_IBPB_ENTRY.\n"); + pr_err("WARNING: kernel not compiled with MITIGATION_IBPB_ENTRY.\n"); goto do_cmd_auto; } break; case RETBLEED_CMD_STUFF: - if (IS_ENABLED(CONFIG_CALL_DEPTH_TRACKING) && + if (IS_ENABLED(CONFIG_MITIGATION_CALL_DEPTH_TRACKING) && spectre_v2_enabled == SPECTRE_V2_RETPOLINE) { retbleed_mitigation = RETBLEED_MITIGATION_STUFF; } else { - if (IS_ENABLED(CONFIG_CALL_DEPTH_TRACKING)) + if (IS_ENABLED(CONFIG_MITIGATION_CALL_DEPTH_TRACKING)) pr_err("WARNING: retbleed=stuff depends on spectre_v2=retpoline\n"); else - pr_err("WARNING: kernel not compiled with CALL_DEPTH_TRACKING.\n"); + pr_err("WARNING: kernel not compiled with MITIGATION_CALL_DEPTH_TRACKING.\n"); goto do_cmd_auto; } @@ -1081,9 +1081,10 @@ do_cmd_auto: case RETBLEED_CMD_AUTO: if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD || boot_cpu_data.x86_vendor == X86_VENDOR_HYGON) { - if (IS_ENABLED(CONFIG_CPU_UNRET_ENTRY)) + if (IS_ENABLED(CONFIG_MITIGATION_UNRET_ENTRY)) retbleed_mitigation = RETBLEED_MITIGATION_UNRET; - else if (IS_ENABLED(CONFIG_CPU_IBPB_ENTRY) && boot_cpu_has(X86_FEATURE_IBPB)) + else if (IS_ENABLED(CONFIG_MITIGATION_IBPB_ENTRY) && + boot_cpu_has(X86_FEATURE_IBPB)) retbleed_mitigation = RETBLEED_MITIGATION_IBPB; } @@ -1162,7 +1163,7 @@ static enum spectre_v2_user_mitigation spectre_v2_user_stibp __ro_after_init = static enum spectre_v2_user_mitigation spectre_v2_user_ibpb __ro_after_init = SPECTRE_V2_USER_NONE; -#ifdef CONFIG_RETPOLINE +#ifdef CONFIG_MITIGATION_RETPOLINE static bool spectre_v2_bad_module; bool retpoline_module_ok(bool has_retpoline) @@ -1475,7 +1476,7 @@ static enum spectre_v2_mitigation_cmd __init spectre_v2_parse_cmdline(void) cmd == SPECTRE_V2_CMD_RETPOLINE_GENERIC || cmd == SPECTRE_V2_CMD_EIBRS_LFENCE || cmd == SPECTRE_V2_CMD_EIBRS_RETPOLINE) && - !IS_ENABLED(CONFIG_RETPOLINE)) { + !IS_ENABLED(CONFIG_MITIGATION_RETPOLINE)) { pr_err("%s selected but not compiled in. Switching to AUTO select\n", mitigation_options[i].option); return SPECTRE_V2_CMD_AUTO; @@ -1498,7 +1499,7 @@ static enum spectre_v2_mitigation_cmd __init spectre_v2_parse_cmdline(void) return SPECTRE_V2_CMD_AUTO; } - if (cmd == SPECTRE_V2_CMD_IBRS && !IS_ENABLED(CONFIG_CPU_IBRS_ENTRY)) { + if (cmd == SPECTRE_V2_CMD_IBRS && !IS_ENABLED(CONFIG_MITIGATION_IBRS_ENTRY)) { pr_err("%s selected but not compiled in. Switching to AUTO select\n", mitigation_options[i].option); return SPECTRE_V2_CMD_AUTO; @@ -1529,7 +1530,7 @@ static enum spectre_v2_mitigation_cmd __init spectre_v2_parse_cmdline(void) static enum spectre_v2_mitigation __init spectre_v2_select_retpoline(void) { - if (!IS_ENABLED(CONFIG_RETPOLINE)) { + if (!IS_ENABLED(CONFIG_MITIGATION_RETPOLINE)) { pr_err("Kernel not compiled with retpoline; no mitigation available!"); return SPECTRE_V2_NONE; } @@ -1697,7 +1698,7 @@ static void __init spectre_v2_select_mitigation(void) break; } - if (IS_ENABLED(CONFIG_CPU_IBRS_ENTRY) && + if (IS_ENABLED(CONFIG_MITIGATION_IBRS_ENTRY) && boot_cpu_has_bug(X86_BUG_RETBLEED) && retbleed_cmd != RETBLEED_CMD_OFF && retbleed_cmd != RETBLEED_CMD_STUFF && @@ -2591,7 +2592,7 @@ static void __init srso_select_mitigation(void) break; case SRSO_CMD_SAFE_RET: - if (IS_ENABLED(CONFIG_CPU_SRSO)) { + if (IS_ENABLED(CONFIG_MITIGATION_SRSO)) { /* * Enable the return thunk for generated code * like ftrace, static_call, etc. @@ -2611,29 +2612,29 @@ static void __init srso_select_mitigation(void) else srso_mitigation = SRSO_MITIGATION_SAFE_RET_UCODE_NEEDED; } else { - pr_err("WARNING: kernel not compiled with CPU_SRSO.\n"); + pr_err("WARNING: kernel not compiled with MITIGATION_SRSO.\n"); } break; case SRSO_CMD_IBPB: - if (IS_ENABLED(CONFIG_CPU_IBPB_ENTRY)) { + if (IS_ENABLED(CONFIG_MITIGATION_IBPB_ENTRY)) { if (has_microcode) { setup_force_cpu_cap(X86_FEATURE_ENTRY_IBPB); srso_mitigation = SRSO_MITIGATION_IBPB; } } else { - pr_err("WARNING: kernel not compiled with CPU_IBPB_ENTRY.\n"); + pr_err("WARNING: kernel not compiled with MITIGATION_IBPB_ENTRY.\n"); } break; case SRSO_CMD_IBPB_ON_VMEXIT: - if (IS_ENABLED(CONFIG_CPU_SRSO)) { + if (IS_ENABLED(CONFIG_MITIGATION_SRSO)) { if (!boot_cpu_has(X86_FEATURE_ENTRY_IBPB) && has_microcode) { setup_force_cpu_cap(X86_FEATURE_IBPB_ON_VMEXIT); srso_mitigation = SRSO_MITIGATION_IBPB_ON_VMEXIT; } } else { - pr_err("WARNING: kernel not compiled with CPU_SRSO.\n"); + pr_err("WARNING: kernel not compiled with MITIGATION_SRSO.\n"); } break; } @@ -3016,3 +3017,8 @@ ssize_t cpu_show_reg_file_data_sampling(struct device *dev, struct device_attrib return cpu_show_common(dev, attr, buf, X86_BUG_RFDS); } #endif + +void __warn_thunk(void) +{ + WARN_ONCE(1, "Unpatched return thunk in use. This should not happen!\n"); +} -- cgit v1.2.3