From: Breno Leitao <leitao@debian.org>
To: jpoimboe@kernel.org, mingo@redhat.com, tglx@linutronix.de,
bp@alien8.de, Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Peter Zijlstra <peterz@infradead.org>,
Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
Masahiro Yamada <masahiroy@kernel.org>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Nicolas Schier <nicolas@fjasle.eu>
Cc: leit@meta.com, linux-kernel@vger.kernel.org,
Yu-cheng Yu <yu-cheng.yu@intel.com>,
"Mike Rapoport (IBM)" <rppt@kernel.org>,
Rick Edgecombe <rick.p.edgecombe@intel.com>,
Kim Phillips <kim.phillips@amd.com>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Juergen Gross <jgross@suse.com>, Kai Huang <kai.huang@intel.com>,
David Woodhouse <dwmw@amazon.co.uk>,
Taehee Yoo <ap420073@gmail.com>, Brian Gerst <brgerst@gmail.com>,
Ingo Molnar <mingo@kernel.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: [PATCH v6 03/13] x86/bugs: Rename CALL_DEPTH_TRACKING to MITIGATION_CALL_DEPTH_TRACKING
Date: Tue, 21 Nov 2023 08:07:30 -0800 [thread overview]
Message-ID: <20231121160740.1249350-4-leitao@debian.org> (raw)
In-Reply-To: <20231121160740.1249350-1-leitao@debian.org>
CPU mitigations config entries are inconsistent, and names are hard to
related. There are concrete benefits for both users and developers of
having all the mitigation config options living in the same config
namespace.
The mitigation options should have consistency and start with
MITIGATION.
Rename the Kconfig entry from CALL_DEPTH_TRACKING to
MITIGATION_CALL_DEPTH_TRACKING.
Suggested-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Breno Leitao <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 2e16ab138a1c..3ecfeedaf248 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2526,7 +2526,7 @@ 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
@@ -2546,7 +2546,7 @@ 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 a1168e7b69e5..d4ff517cfbd1 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 702d93fdd10e..c1d3a5795618 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 0676b077207c..64d9f0e87419 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 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/bugs.c b/arch/x86/kernel/cpu/bugs.c
index 1de4791091ca..b906ed4f3091 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 7b2589877d06..ff46f48a0cc4 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 68d0134bdbf9..cc44c95c49cc 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 fafe9be7a6f4..3d61b2432991 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))
--
2.34.1
next prev parent reply other threads:[~2023-11-21 17:10 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-21 16:07 [PATCH v6 00/13] x86/bugs: Add a separate config for each mitigation Breno Leitao
2023-11-21 16:07 ` [PATCH v6 01/13] x86/bugs: Rename GDS_FORCE_MITIGATION to MITIGATION_GDS_FORCE Breno Leitao
2024-01-10 10:09 ` [tip: x86/bugs] x86/bugs: Rename CONFIG_GDS_FORCE_MITIGATION => CONFIG_MITIGATION_GDS_FORCE tip-bot2 for Breno Leitao
2023-11-21 16:07 ` [PATCH v6 02/13] x86/bugs: Rename CPU_IBPB_ENTRY to MITIGATION_IBPB_ENTRY Breno Leitao
2024-01-10 10:09 ` [tip: x86/bugs] x86/bugs: Rename CONFIG_CPU_IBPB_ENTRY => CONFIG_MITIGATION_IBPB_ENTRY tip-bot2 for Breno Leitao
2023-11-21 16:07 ` Breno Leitao [this message]
2024-01-10 10:09 ` [tip: x86/bugs] x86/bugs: Rename CONFIG_CALL_DEPTH_TRACKING => CONFIG_MITIGATION_CALL_DEPTH_TRACKING tip-bot2 for Breno Leitao
2023-11-21 16:07 ` [PATCH v6 04/13] x86/bugs: Rename PAGE_TABLE_ISOLATION to MITIGATION_PAGE_TABLE_ISOLATION Breno Leitao
2024-01-10 10:09 ` [tip: x86/bugs] x86/bugs: Rename CONFIG_PAGE_TABLE_ISOLATION => CONFIG_MITIGATION_PAGE_TABLE_ISOLATION tip-bot2 for Breno Leitao
2023-11-21 16:07 ` [PATCH v6 05/13] x86/bugs: Rename RETPOLINE to MITIGATION_RETPOLINE Breno Leitao
2023-11-22 15:08 ` Ariel Miculas
2024-01-10 10:09 ` [tip: x86/bugs] x86/bugs: Rename CONFIG_RETPOLINE => CONFIG_MITIGATION_RETPOLINE tip-bot2 for Breno Leitao
2023-11-21 16:07 ` [PATCH v6 06/13] x86/bugs: Rename SLS to CONFIG_MITIGATION_SLS Breno Leitao
2024-01-10 10:09 ` [tip: x86/bugs] x86/bugs: Rename CONFIG_SLS => CONFIG_MITIGATION_SLS tip-bot2 for Breno Leitao
2023-11-21 16:07 ` [PATCH v6 07/13] x86/bugs: Rename CPU_UNRET_ENTRY to MITIGATION_UNRET_ENTRY Breno Leitao
2024-01-10 10:09 ` [tip: x86/bugs] x86/bugs: Rename CONFIG_CPU_UNRET_ENTRY => CONFIG_MITIGATION_UNRET_ENTRY tip-bot2 for Breno Leitao
2023-11-21 16:07 ` [PATCH v6 08/13] x86/bugs: Rename CPU_IBRS_ENTRY to MITIGATION_IBRS_ENTRY Breno Leitao
2024-01-10 10:09 ` [tip: x86/bugs] x86/bugs: Rename CONFIG_CPU_IBRS_ENTRY => CONFIG_MITIGATION_IBRS_ENTRY tip-bot2 for Breno Leitao
2023-11-21 16:07 ` [PATCH v6 09/13] x86/bugs: Rename CPU_SRSO to MITIGATION_SRSO Breno Leitao
2024-01-10 10:09 ` [tip: x86/bugs] x86/bugs: Rename CONFIG_CPU_SRSO => CONFIG_MITIGATION_SRSO tip-bot2 for Breno Leitao
2023-11-21 16:07 ` [PATCH v6 10/13] x86/bugs: Rename RETHUNK to MITIGATION_RETHUNK Breno Leitao
2023-11-21 21:39 ` Andrew Cooper
2023-11-22 15:54 ` Breno Leitao
2024-01-10 10:09 ` [tip: x86/bugs] x86/bugs: Rename CONFIG_RETHUNK => CONFIG_MITIGATION_RETHUNK tip-bot2 for Breno Leitao
2023-11-21 16:07 ` [PATCH v6 11/13] x86/bugs: Create a way to disable GDS mitigation Breno Leitao
2023-11-21 16:07 ` [PATCH v6 12/13] x86/bugs: spectre_v2_user default mode depends on Kconfig Breno Leitao
2023-11-21 16:07 ` [PATCH v6 13/13] x86/bugs: Add a separate config for missing mitigation Breno Leitao
2023-11-29 4:42 ` [PATCH v6 00/13] x86/bugs: Add a separate config for each mitigation Josh Poimboeuf
2024-01-10 9:56 ` Ingo Molnar
2024-01-10 11:55 ` Breno Leitao
2024-01-10 18:07 ` Ingo Molnar
2024-04-30 13:12 ` Breno Leitao
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