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Date: Wed, 10 Jan 2024 10:09:53 -0000
From: "tip-bot2 for Breno Leitao" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Josh Poimboeuf <jpoimboe@...nel.org>, Breno Leitao <leitao@...ian.org>,
Ingo Molnar <mingo@...nel.org>,
Linus Torvalds <torvalds@...ux-foundation.org>, x86@...nel.org,
linux-kernel@...r.kernel.org
Subject: [tip: x86/bugs] x86/bugs: Rename CONFIG_CALL_DEPTH_TRACKING =>
CONFIG_MITIGATION_CALL_DEPTH_TRACKING
The following commit has been merged into the x86/bugs branch of tip:
Commit-ID: 5fa31af31e726c7f5a8f84800153054ca499338a
Gitweb: https://git.kernel.org/tip/5fa31af31e726c7f5a8f84800153054ca499338a
Author: Breno Leitao <leitao@...ian.org>
AuthorDate: Tue, 21 Nov 2023 08:07:30 -08:00
Committer: Ingo Molnar <mingo@...nel.org>
CommitterDate: Wed, 10 Jan 2024 10:52:28 +01:00
x86/bugs: Rename CONFIG_CALL_DEPTH_TRACKING => CONFIG_MITIGATION_CALL_DEPTH_TRACKING
Step 3/10 of the namespace unification of CPU mitigations related Kconfig options.
Suggested-by: Josh Poimboeuf <jpoimboe@...nel.org>
Signed-off-by: Breno Leitao <leitao@...ian.org>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Acked-by: Josh Poimboeuf <jpoimboe@...nel.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Link: https://lore.kernel.org/r/20231121160740.1249350-4-leitao@debian.org
---
arch/x86/Kconfig | 4 ++--
arch/x86/include/asm/current.h | 2 +-
arch/x86/include/asm/disabled-features.h | 2 +-
arch/x86/include/asm/nospec-branch.h | 10 +++++-----
arch/x86/kernel/asm-offsets.c | 2 +-
arch/x86/kernel/cpu/bugs.c | 6 +++---
arch/x86/lib/retpoline.S | 6 +++---
scripts/Makefile.lib | 2 +-
tools/arch/x86/include/asm/disabled-features.h | 2 +-
9 files changed, 18 insertions(+), 18 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index c4e04b6..b4a703d 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2523,7 +2523,7 @@ config CPU_UNRET_ENTRY
help
Compile the kernel with support for the retbleed=unret mitigation.
-config CALL_DEPTH_TRACKING
+config MITIGATION_CALL_DEPTH_TRACKING
bool "Mitigate RSB underflow with call depth tracking"
depends on CPU_SUP_INTEL && HAVE_CALL_THUNKS
select HAVE_DYNAMIC_FTRACE_NO_PATCHABLE
@@ -2543,7 +2543,7 @@ config CALL_DEPTH_TRACKING
config CALL_THUNKS_DEBUG
bool "Enable call thunks and call depth tracking debugging"
- depends on CALL_DEPTH_TRACKING
+ depends on MITIGATION_CALL_DEPTH_TRACKING
select FUNCTION_ALIGNMENT_32B
default n
help
diff --git a/arch/x86/include/asm/current.h b/arch/x86/include/asm/current.h
index a1168e7..d4ff517 100644
--- a/arch/x86/include/asm/current.h
+++ b/arch/x86/include/asm/current.h
@@ -17,7 +17,7 @@ struct pcpu_hot {
struct task_struct *current_task;
int preempt_count;
int cpu_number;
-#ifdef CONFIG_CALL_DEPTH_TRACKING
+#ifdef CONFIG_MITIGATION_CALL_DEPTH_TRACKING
u64 call_depth;
#endif
unsigned long top_of_stack;
diff --git a/arch/x86/include/asm/disabled-features.h b/arch/x86/include/asm/disabled-features.h
index 702d93f..c1d3a57 100644
--- a/arch/x86/include/asm/disabled-features.h
+++ b/arch/x86/include/asm/disabled-features.h
@@ -69,7 +69,7 @@
# define DISABLE_UNRET (1 << (X86_FEATURE_UNRET & 31))
#endif
-#ifdef CONFIG_CALL_DEPTH_TRACKING
+#ifdef CONFIG_MITIGATION_CALL_DEPTH_TRACKING
# define DISABLE_CALL_DEPTH_TRACKING 0
#else
# define DISABLE_CALL_DEPTH_TRACKING (1 << (X86_FEATURE_CALL_DEPTH & 31))
diff --git a/arch/x86/include/asm/nospec-branch.h b/arch/x86/include/asm/nospec-branch.h
index 7341fd9..5981023 100644
--- a/arch/x86/include/asm/nospec-branch.h
+++ b/arch/x86/include/asm/nospec-branch.h
@@ -73,7 +73,7 @@
# define CALL_THUNKS_DEBUG_INC_CTXSW
#endif
-#if defined(CONFIG_CALL_DEPTH_TRACKING) && !defined(COMPILE_OFFSETS)
+#if defined(CONFIG_MITIGATION_CALL_DEPTH_TRACKING) && !defined(COMPILE_OFFSETS)
#include <asm/asm-offsets.h>
@@ -309,7 +309,7 @@
.macro CALL_DEPTH_ACCOUNT
-#ifdef CONFIG_CALL_DEPTH_TRACKING
+#ifdef CONFIG_MITIGATION_CALL_DEPTH_TRACKING
ALTERNATIVE "", \
__stringify(ASM_INCREMENT_CALL_DEPTH), X86_FEATURE_CALL_DEPTH
#endif
@@ -357,7 +357,7 @@ extern void entry_ibpb(void);
extern void (*x86_return_thunk)(void);
-#ifdef CONFIG_CALL_DEPTH_TRACKING
+#ifdef CONFIG_MITIGATION_CALL_DEPTH_TRACKING
extern void call_depth_return_thunk(void);
#define CALL_DEPTH_ACCOUNT \
@@ -371,12 +371,12 @@ DECLARE_PER_CPU(u64, __x86_ret_count);
DECLARE_PER_CPU(u64, __x86_stuffs_count);
DECLARE_PER_CPU(u64, __x86_ctxsw_count);
#endif
-#else /* !CONFIG_CALL_DEPTH_TRACKING */
+#else /* !CONFIG_MITIGATION_CALL_DEPTH_TRACKING */
static inline void call_depth_return_thunk(void) {}
#define CALL_DEPTH_ACCOUNT ""
-#endif /* CONFIG_CALL_DEPTH_TRACKING */
+#endif /* CONFIG_MITIGATION_CALL_DEPTH_TRACKING */
#ifdef CONFIG_RETPOLINE
diff --git a/arch/x86/kernel/asm-offsets.c b/arch/x86/kernel/asm-offsets.c
index 6913b37..a98020b 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/bugs.c b/arch/x86/kernel/cpu/bugs.c
index 1de4791..b906ed4 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -1003,15 +1003,15 @@ static void __init retbleed_select_mitigation(void)
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;
}
diff --git a/arch/x86/lib/retpoline.S b/arch/x86/lib/retpoline.S
index 7b25898..ff46f48 100644
--- a/arch/x86/lib/retpoline.S
+++ b/arch/x86/lib/retpoline.S
@@ -71,7 +71,7 @@ SYM_CODE_END(__x86_indirect_thunk_array)
#include <asm/GEN-for-each-reg.h>
#undef GEN
-#ifdef CONFIG_CALL_DEPTH_TRACKING
+#ifdef CONFIG_MITIGATION_CALL_DEPTH_TRACKING
.macro CALL_THUNK reg
.align RETPOLINE_THUNK_SIZE
@@ -327,7 +327,7 @@ __EXPORT_THUNK(entry_untrain_ret)
#endif /* CONFIG_CPU_UNRET_ENTRY || CONFIG_CPU_SRSO */
-#ifdef CONFIG_CALL_DEPTH_TRACKING
+#ifdef CONFIG_MITIGATION_CALL_DEPTH_TRACKING
.align 64
SYM_FUNC_START(call_depth_return_thunk)
@@ -359,7 +359,7 @@ SYM_FUNC_START(call_depth_return_thunk)
int3
SYM_FUNC_END(call_depth_return_thunk)
-#endif /* CONFIG_CALL_DEPTH_TRACKING */
+#endif /* CONFIG_MITIGATION_CALL_DEPTH_TRACKING */
/*
* This function name is magical and is used by -mfunction-return=thunk-extern
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 1a965fe..ee233ef 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -254,7 +254,7 @@ objtool := $(objtree)/tools/objtool/objtool
objtool-args-$(CONFIG_HAVE_JUMP_LABEL_HACK) += --hacks=jump_label
objtool-args-$(CONFIG_HAVE_NOINSTR_HACK) += --hacks=noinstr
-objtool-args-$(CONFIG_CALL_DEPTH_TRACKING) += --hacks=skylake
+objtool-args-$(CONFIG_MITIGATION_CALL_DEPTH_TRACKING) += --hacks=skylake
objtool-args-$(CONFIG_X86_KERNEL_IBT) += --ibt
objtool-args-$(CONFIG_FINEIBT) += --cfi
objtool-args-$(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL) += --mcount
diff --git a/tools/arch/x86/include/asm/disabled-features.h b/tools/arch/x86/include/asm/disabled-features.h
index 702d93f..c1d3a57 100644
--- a/tools/arch/x86/include/asm/disabled-features.h
+++ b/tools/arch/x86/include/asm/disabled-features.h
@@ -69,7 +69,7 @@
# define DISABLE_UNRET (1 << (X86_FEATURE_UNRET & 31))
#endif
-#ifdef CONFIG_CALL_DEPTH_TRACKING
+#ifdef CONFIG_MITIGATION_CALL_DEPTH_TRACKING
# define DISABLE_CALL_DEPTH_TRACKING 0
#else
# define DISABLE_CALL_DEPTH_TRACKING (1 << (X86_FEATURE_CALL_DEPTH & 31))
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