x86/bugs: Rename CONFIG_CPU_SRSO => CONFIG_MITIGATION_SRSO

Step 9/10 of the namespace unification of CPU mitigations related Kconfig options.

Suggested-by: Josh Poimboeuf <[email protected]>
Signed-off-by: Breno Leitao <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Acked-by: Josh Poimboeuf <[email protected]>
Cc: Linus Torvalds <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 60d38df26f007951c7bc0bc516893cf66df61f2b..a2743b7f2a18f68ea04fe827fa824613113a6508 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2570,7 +2570,7 @@ config MITIGATION_IBRS_ENTRY
          This mitigates both spectre_v2 and retbleed at great cost to
          performance.
 
-config CPU_SRSO
+config MITIGATION_SRSO
        bool "Mitigate speculative RAS overflow on AMD"
        depends on CPU_SUP_AMD && X86_64 && RETHUNK
        default y

diff --git a/arch/x86/include/asm/nospec-branch.h b/arch/x86/include/asm/nospec-branch.h
index 97478690a5794ff54132c14181ea7614ac894906..94c70832994f359760b54973c5d4793b72903081 100644 (file)
--- a/arch/x86/include/asm/nospec-branch.h
+++ b/arch/x86/include/asm/nospec-branch.h
@@ -212,7 +212,7 @@
  */
 .macro VALIDATE_UNRET_END
 #if defined(CONFIG_NOINSTR_VALIDATION) && \
-       (defined(CONFIG_MITIGATION_UNRET_ENTRY) || defined(CONFIG_CPU_SRSO))
+       (defined(CONFIG_MITIGATION_UNRET_ENTRY) || defined(CONFIG_MITIGATION_SRSO))
        ANNOTATE_RETPOLINE_SAFE
        nop
 #endif
@@ -271,7 +271,7 @@
 .Lskip_rsb_\@:
 .endm
 
-#if defined(CONFIG_MITIGATION_UNRET_ENTRY) || defined(CONFIG_CPU_SRSO)
+#if defined(CONFIG_MITIGATION_UNRET_ENTRY) || defined(CONFIG_MITIGATION_SRSO)
 #define CALL_UNTRAIN_RET       "call entry_untrain_ret"
 #else
 #define CALL_UNTRAIN_RET       ""
@@ -340,7 +340,7 @@ extern void retbleed_return_thunk(void);
 static inline void retbleed_return_thunk(void) {}
 #endif
 
-#ifdef CONFIG_CPU_SRSO
+#ifdef CONFIG_MITIGATION_SRSO
 extern void srso_return_thunk(void);
 extern void srso_alias_return_thunk(void);
 #else

diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index e11bacbd8f3938d9a5695bc1f00b9109cc14f47c..f2775417bda26a949699f85d8652a764a7d66f66 100644 (file)
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -2458,7 +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.
@@ -2478,7 +2478,7 @@ 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;
 
@@ -2494,13 +2494,13 @@ static void __init srso_select_mitigation(void)
                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;
        }

diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index 9c5cca50a36fae8c8d1e68f77c197100ec939940..6716fccd59ce09930f295ac652c648b5376e8c74 100644 (file)
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -142,7 +142,7 @@ 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.
@@ -508,7 +508,7 @@ INIT_PER_CPU(irq_stack_backing_store);
 . = 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.

diff --git a/arch/x86/lib/retpoline.S b/arch/x86/lib/retpoline.S
index 0ad67ccadd4c740729607c875ca9c17c5a6a2c20..67b52cbec64889eb2a9a6c51662af1f8c053461b 100644 (file)
--- a/arch/x86/lib/retpoline.S
+++ b/arch/x86/lib/retpoline.S
@@ -138,7 +138,7 @@ SYM_CODE_END(__x86_indirect_jump_thunk_array)
  */
        .section .text..__x86.return_thunk
 
-#ifdef CONFIG_CPU_SRSO
+#ifdef CONFIG_MITIGATION_SRSO
 
 /*
  * srso_alias_untrain_ret() and srso_alias_safe_ret() are placed at
@@ -225,10 +225,10 @@ SYM_CODE_END(srso_return_thunk)
 
 #define JMP_SRSO_UNTRAIN_RET "jmp srso_untrain_ret"
 #define JMP_SRSO_ALIAS_UNTRAIN_RET "jmp srso_alias_untrain_ret"
-#else /* !CONFIG_CPU_SRSO */
+#else /* !CONFIG_MITIGATION_SRSO */
 #define JMP_SRSO_UNTRAIN_RET "ud2"
 #define JMP_SRSO_ALIAS_UNTRAIN_RET "ud2"
-#endif /* CONFIG_CPU_SRSO */
+#endif /* CONFIG_MITIGATION_SRSO */
 
 #ifdef CONFIG_MITIGATION_UNRET_ENTRY
 
@@ -316,7 +316,7 @@ SYM_FUNC_END(retbleed_untrain_ret)
 #define JMP_RETBLEED_UNTRAIN_RET "ud2"
 #endif /* CONFIG_MITIGATION_UNRET_ENTRY */
 
-#if defined(CONFIG_MITIGATION_UNRET_ENTRY) || defined(CONFIG_CPU_SRSO)
+#if defined(CONFIG_MITIGATION_UNRET_ENTRY) || defined(CONFIG_MITIGATION_SRSO)
 
 SYM_FUNC_START(entry_untrain_ret)
        ALTERNATIVE_2 JMP_RETBLEED_UNTRAIN_RET,                         \
@@ -325,7 +325,7 @@ SYM_FUNC_START(entry_untrain_ret)
 SYM_FUNC_END(entry_untrain_ret)
 __EXPORT_THUNK(entry_untrain_ret)
 
-#endif /* CONFIG_MITIGATION_UNRET_ENTRY || CONFIG_CPU_SRSO */
+#endif /* CONFIG_MITIGATION_UNRET_ENTRY || CONFIG_MITIGATION_SRSO */
 
 #ifdef CONFIG_MITIGATION_CALL_DEPTH_TRACKING
 

diff --git a/include/linux/objtool.h b/include/linux/objtool.h
index d030671a4c49d9e69425dc0242959a929d68694c..b3b8d3dab52d5c5b43b390bb5a204226164c2796 100644 (file)
--- a/include/linux/objtool.h
+++ b/include/linux/objtool.h
@@ -131,7 +131,7 @@
  */
 .macro VALIDATE_UNRET_BEGIN
 #if defined(CONFIG_NOINSTR_VALIDATION) && \
-       (defined(CONFIG_MITIGATION_UNRET_ENTRY) || defined(CONFIG_CPU_SRSO))
+       (defined(CONFIG_MITIGATION_UNRET_ENTRY) || defined(CONFIG_MITIGATION_SRSO))
 .Lhere_\@:
        .pushsection .discard.validate_unret
        .long   .Lhere_\@ - .

diff --git a/scripts/Makefile.vmlinux_o b/scripts/Makefile.vmlinux_o
index 6277dbd730bbb05574c0710c8c0074b8410a5e1b..6de297916ce680accc8eff02aa2957cf8c915f19 100644 (file)
--- a/scripts/Makefile.vmlinux_o
+++ b/scripts/Makefile.vmlinux_o
@@ -38,7 +38,7 @@ objtool-enabled := $(or $(delay-objtool),$(CONFIG_NOINSTR_VALIDATION))
 vmlinux-objtool-args-$(delay-objtool)                  += $(objtool-args-y)
 vmlinux-objtool-args-$(CONFIG_GCOV_KERNEL)             += --no-unreachable
 vmlinux-objtool-args-$(CONFIG_NOINSTR_VALIDATION)      += --noinstr \
-                                                          $(if $(or $(CONFIG_MITIGATION_UNRET_ENTRY),$(CONFIG_CPU_SRSO)), --unret)
+                                                          $(if $(or $(CONFIG_MITIGATION_UNRET_ENTRY),$(CONFIG_MITIGATION_SRSO)), --unret)
 
 objtool-args = $(vmlinux-objtool-args-y) --link