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x86/bugs: Rename CONFIG_CPU_SRSO => CONFIG_MITIGATION_SRSO

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

Suggested-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20231121160740.1249350-10-leitao@debian.org
This commit is contained in:
Breno Leitao 2023-11-21 08:07:36 -08:00 committed by Ingo Molnar
parent 1da8d2172c
commit a033eec9a0
7 changed files with 17 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/x86/Kconfig
View File

@ -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

6
arch/x86/include/asm/nospec-branch.h
View File

@ -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

8
arch/x86/kernel/cpu/bugs.c
View File

@ -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;
}

4
arch/x86/kernel/vmlinux.lds.S
View File

@ -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.

10
arch/x86/lib/retpoline.S
View File

@ -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

2
include/linux/objtool.h
View File

@ -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_\@ - .

2
scripts/Makefile.vmlinux_o
View File

@ -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