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-rw-r--r--arch/x86/kernel/alternative.c14
-rw-r--r--arch/x86/kernel/asm-offsets.c2
-rw-r--r--arch/x86/kernel/cpu/amd.c2
-rw-r--r--arch/x86/kernel/cpu/bugs.c48
-rw-r--r--arch/x86/kernel/dumpstack.c2
-rw-r--r--arch/x86/kernel/ftrace.c3
-rw-r--r--arch/x86/kernel/head_32.S4
-rw-r--r--arch/x86/kernel/head_64.S2
-rw-r--r--arch/x86/kernel/kprobes/opt.c2
-rw-r--r--arch/x86/kernel/ldt.c8
-rw-r--r--arch/x86/kernel/static_call.c2
-rw-r--r--arch/x86/kernel/vmlinux.lds.S10
12 files changed, 53 insertions, 46 deletions
diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
index e7aeae02aaca..ff6e32ec8259 100644
--- a/arch/x86/kernel/alternative.c
+++ b/arch/x86/kernel/alternative.c
@@ -544,7 +544,7 @@ static inline bool is_jcc32(struct insn *insn)
return insn->opcode.bytes[0] == 0x0f && (insn->opcode.bytes[1] & 0xf0) == 0x80;
}
-#if defined(CONFIG_RETPOLINE) && defined(CONFIG_OBJTOOL)
+#if defined(CONFIG_MITIGATION_RETPOLINE) && defined(CONFIG_OBJTOOL)
/*
* CALL/JMP *%\reg
@@ -708,8 +708,8 @@ static int patch_retpoline(void *addr, struct insn *insn, u8 *bytes)
/*
* The compiler is supposed to EMIT an INT3 after every unconditional
* JMP instruction due to AMD BTC. However, if the compiler is too old
- * or SLS isn't enabled, we still need an INT3 after indirect JMPs
- * even on Intel.
+ * or MITIGATION_SLS isn't enabled, we still need an INT3 after
+ * indirect JMPs even on Intel.
*/
if (op == JMP32_INSN_OPCODE && i < insn->length)
bytes[i++] = INT3_INSN_OPCODE;
@@ -769,7 +769,7 @@ void __init_or_module noinline apply_retpolines(s32 *start, s32 *end)
}
}
-#ifdef CONFIG_RETHUNK
+#ifdef CONFIG_MITIGATION_RETHUNK
/*
* Rewrite the compiler generated return thunk tail-calls.
@@ -842,14 +842,14 @@ void __init_or_module noinline apply_returns(s32 *start, s32 *end)
}
#else
void __init_or_module noinline apply_returns(s32 *start, s32 *end) { }
-#endif /* CONFIG_RETHUNK */
+#endif /* CONFIG_MITIGATION_RETHUNK */
-#else /* !CONFIG_RETPOLINE || !CONFIG_OBJTOOL */
+#else /* !CONFIG_MITIGATION_RETPOLINE || !CONFIG_OBJTOOL */
void __init_or_module noinline apply_retpolines(s32 *start, s32 *end) { }
void __init_or_module noinline apply_returns(s32 *start, s32 *end) { }
-#endif /* CONFIG_RETPOLINE && CONFIG_OBJTOOL */
+#endif /* CONFIG_MITIGATION_RETPOLINE && CONFIG_OBJTOOL */
#ifdef CONFIG_X86_KERNEL_IBT
diff --git a/arch/x86/kernel/asm-offsets.c b/arch/x86/kernel/asm-offsets.c
index 6913b372ccf7..a98020bf31bb 100644
--- a/arch/x86/kernel/asm-offsets.c
+++ b/arch/x86/kernel/asm-offsets.c
@@ -109,7 +109,7 @@ static void __used common(void)
OFFSET(TSS_sp2, tss_struct, x86_tss.sp2);
OFFSET(X86_top_of_stack, pcpu_hot, top_of_stack);
OFFSET(X86_current_task, pcpu_hot, current_task);
-#ifdef CONFIG_CALL_DEPTH_TRACKING
+#ifdef CONFIG_MITIGATION_CALL_DEPTH_TRACKING
OFFSET(X86_call_depth, pcpu_hot, call_depth);
#endif
#if IS_ENABLED(CONFIG_CRYPTO_ARIA_AESNI_AVX_X86_64)
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index f3abca334199..310fea1af124 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -941,7 +941,7 @@ static void fix_erratum_1386(struct cpuinfo_x86 *c)
void init_spectral_chicken(struct cpuinfo_x86 *c)
{
-#ifdef CONFIG_CPU_UNRET_ENTRY
+#ifdef CONFIG_MITIGATION_UNRET_ENTRY
u64 value;
/*
diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index bb0ab8466b91..a78892b0f823 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -671,7 +671,7 @@ 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;
@@ -982,10 +982,10 @@ 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;
@@ -994,24 +994,24 @@ 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;
}
@@ -1021,9 +1021,10 @@ 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;
}
@@ -1102,7 +1103,7 @@ 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)
@@ -1415,7 +1416,7 @@ 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;
@@ -1438,7 +1439,7 @@ 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;
@@ -1469,7 +1470,7 @@ 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;
}
@@ -1564,7 +1565,7 @@ 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 &&
@@ -2457,7 +2458,7 @@ 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.
@@ -2477,29 +2478,29 @@ 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;
}
@@ -2849,3 +2850,8 @@ ssize_t cpu_show_gds(struct device *dev, struct device_attribute *attr, char *bu
return cpu_show_common(dev, attr, buf, X86_BUG_GDS);
}
#endif
+
+void __warn_thunk(void)
+{
+ WARN_ONCE(1, "Unpatched return thunk in use. This should not happen!\n");
+}
diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index f18ca44c904b..44a91ef5a23b 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -410,7 +410,7 @@ static void __die_header(const char *str, struct pt_regs *regs, long err)
IS_ENABLED(CONFIG_SMP) ? " SMP" : "",
debug_pagealloc_enabled() ? " DEBUG_PAGEALLOC" : "",
IS_ENABLED(CONFIG_KASAN) ? " KASAN" : "",
- IS_ENABLED(CONFIG_PAGE_TABLE_ISOLATION) ?
+ IS_ENABLED(CONFIG_MITIGATION_PAGE_TABLE_ISOLATION) ?
(boot_cpu_has(X86_FEATURE_PTI) ? " PTI" : " NOPTI") : "");
}
NOKPROBE_SYMBOL(__die_header);
diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index 12df54ff0e81..70139d9d2e01 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -307,7 +307,8 @@ union ftrace_op_code_union {
} __attribute__((packed));
};
-#define RET_SIZE (IS_ENABLED(CONFIG_RETPOLINE) ? 5 : 1 + IS_ENABLED(CONFIG_SLS))
+#define RET_SIZE \
+ (IS_ENABLED(CONFIG_MITIGATION_RETPOLINE) ? 5 : 1 + IS_ENABLED(CONFIG_MITIGATION_SLS))
static unsigned long
create_trampoline(struct ftrace_ops *ops, unsigned int *tramp_size)
diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S
index 487ac57e2c81..b50f3641c4d6 100644
--- a/arch/x86/kernel/head_32.S
+++ b/arch/x86/kernel/head_32.S
@@ -414,7 +414,7 @@ __REFDATA
.align 4
SYM_DATA(initial_code, .long i386_start_kernel)
-#ifdef CONFIG_PAGE_TABLE_ISOLATION
+#ifdef CONFIG_MITIGATION_PAGE_TABLE_ISOLATION
#define PGD_ALIGN (2 * PAGE_SIZE)
#define PTI_USER_PGD_FILL 1024
#else
@@ -474,7 +474,7 @@ SYM_DATA_START(initial_page_table)
# endif
.align PAGE_SIZE /* needs to be page-sized too */
-#ifdef CONFIG_PAGE_TABLE_ISOLATION
+#ifdef CONFIG_MITIGATION_PAGE_TABLE_ISOLATION
/*
* PTI needs another page so sync_initial_pagetable() works correctly
* and does not scribble over the data which is placed behind the
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index bb8ee1ce6968..cc3a81852e4a 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -622,7 +622,7 @@ SYM_CODE_END(vc_no_ghcb)
#define SYM_DATA_START_PAGE_ALIGNED(name) \
SYM_START(name, SYM_L_GLOBAL, .balign PAGE_SIZE)
-#ifdef CONFIG_PAGE_TABLE_ISOLATION
+#ifdef CONFIG_MITIGATION_PAGE_TABLE_ISOLATION
/*
* Each PGD needs to be 8k long and 8k aligned. We do not
* ever go out to userspace with these, so we do not
diff --git a/arch/x86/kernel/kprobes/opt.c b/arch/x86/kernel/kprobes/opt.c
index 517821b48391..36d6809c6c9e 100644
--- a/arch/x86/kernel/kprobes/opt.c
+++ b/arch/x86/kernel/kprobes/opt.c
@@ -324,7 +324,7 @@ static int can_optimize(unsigned long paddr)
* However, the kernel built with retpolines or IBT has jump
* tables disabled so the check can be skipped altogether.
*/
- if (!IS_ENABLED(CONFIG_RETPOLINE) &&
+ if (!IS_ENABLED(CONFIG_MITIGATION_RETPOLINE) &&
!IS_ENABLED(CONFIG_X86_KERNEL_IBT) &&
insn_is_indirect_jump(&insn))
return 0;
diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index 7a814b41402d..0f19ef355f5f 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -184,7 +184,7 @@ static struct ldt_struct *alloc_ldt_struct(unsigned int num_entries)
return new_ldt;
}
-#ifdef CONFIG_PAGE_TABLE_ISOLATION
+#ifdef CONFIG_MITIGATION_PAGE_TABLE_ISOLATION
static void do_sanity_check(struct mm_struct *mm,
bool had_kernel_mapping,
@@ -377,7 +377,7 @@ static void unmap_ldt_struct(struct mm_struct *mm, struct ldt_struct *ldt)
flush_tlb_mm_range(mm, va, va + nr_pages * PAGE_SIZE, PAGE_SHIFT, false);
}
-#else /* !CONFIG_PAGE_TABLE_ISOLATION */
+#else /* !CONFIG_MITIGATION_PAGE_TABLE_ISOLATION */
static int
map_ldt_struct(struct mm_struct *mm, struct ldt_struct *ldt, int slot)
@@ -388,11 +388,11 @@ map_ldt_struct(struct mm_struct *mm, struct ldt_struct *ldt, int slot)
static void unmap_ldt_struct(struct mm_struct *mm, struct ldt_struct *ldt)
{
}
-#endif /* CONFIG_PAGE_TABLE_ISOLATION */
+#endif /* CONFIG_MITIGATION_PAGE_TABLE_ISOLATION */
static void free_ldt_pgtables(struct mm_struct *mm)
{
-#ifdef CONFIG_PAGE_TABLE_ISOLATION
+#ifdef CONFIG_MITIGATION_PAGE_TABLE_ISOLATION
struct mmu_gather tlb;
unsigned long start = LDT_BASE_ADDR;
unsigned long end = LDT_END_ADDR;
diff --git a/arch/x86/kernel/static_call.c b/arch/x86/kernel/static_call.c
index 77a9316da435..4eefaac64c6c 100644
--- a/arch/x86/kernel/static_call.c
+++ b/arch/x86/kernel/static_call.c
@@ -172,7 +172,7 @@ void arch_static_call_transform(void *site, void *tramp, void *func, bool tail)
}
EXPORT_SYMBOL_GPL(arch_static_call_transform);
-#ifdef CONFIG_RETHUNK
+#ifdef CONFIG_MITIGATION_RETHUNK
/*
* This is called by apply_returns() to fix up static call trampolines,
* specifically ARCH_DEFINE_STATIC_CALL_NULL_TRAMP which is recorded as
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index 9be175c8ac97..56451fd2099e 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -133,7 +133,7 @@ SECTIONS
LOCK_TEXT
KPROBES_TEXT
SOFTIRQENTRY_TEXT
-#ifdef CONFIG_RETPOLINE
+#ifdef CONFIG_MITIGATION_RETPOLINE
*(.text..__x86.indirect_thunk)
*(.text..__x86.return_thunk)
#endif
@@ -143,7 +143,7 @@ SECTIONS
*(.text..__x86.rethunk_untrain)
ENTRY_TEXT
-#ifdef CONFIG_CPU_SRSO
+#ifdef CONFIG_MITIGATION_SRSO
/*
* See the comment above srso_alias_untrain_ret()'s
* definition.
@@ -268,7 +268,7 @@ SECTIONS
}
#endif
-#ifdef CONFIG_RETPOLINE
+#ifdef CONFIG_MITIGATION_RETPOLINE
/*
* List of instructions that call/jmp/jcc to retpoline thunks
* __x86_indirect_thunk_*(). These instructions can be patched along
@@ -505,11 +505,11 @@ INIT_PER_CPU(irq_stack_backing_store);
"fixed_percpu_data is not at start of per-cpu area");
#endif
-#ifdef CONFIG_CPU_UNRET_ENTRY
+#ifdef CONFIG_MITIGATION_UNRET_ENTRY
. = ASSERT((retbleed_return_thunk & 0x3f) == 0, "retbleed_return_thunk not cacheline-aligned");
#endif
-#ifdef CONFIG_CPU_SRSO
+#ifdef CONFIG_MITIGATION_SRSO
. = ASSERT((srso_safe_ret & 0x3f) == 0, "srso_safe_ret not cacheline-aligned");
/*
* GNU ld cannot do XOR until 2.41.
generated by cgit v1.2.3 (git 2.46.0) at 2025-12-09 16:37:21 +0000