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Diffstat (limited to 'arch/x86/Kconfig')
-rw-r--r--arch/x86/Kconfig45
1 files changed, 29 insertions, 16 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 0f869c4785b8..8f7271d9f1d7 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -147,6 +147,7 @@ config X86
select EDAC_ATOMIC_SCRUB
select EDAC_SUPPORT
select GENERIC_CLOCKEVENTS_BROADCAST if X86_64 || (X86_32 && X86_LOCAL_APIC)
+ select GENERIC_CLOCKEVENTS_BROADCAST_IDLE if GENERIC_CLOCKEVENTS_BROADCAST
select GENERIC_CLOCKEVENTS_MIN_ADJUST
select GENERIC_CMOS_UPDATE
select GENERIC_CPU_AUTOPROBE
@@ -2430,6 +2431,18 @@ source "kernel/livepatch/Kconfig"
endmenu
+config CC_HAS_NAMED_AS
+ def_bool CC_IS_GCC && GCC_VERSION >= 120100
+
+config USE_X86_SEG_SUPPORT
+ def_bool y
+ depends on CC_HAS_NAMED_AS
+ #
+ # -fsanitize=kernel-address (KASAN) is at the moment incompatible
+ # with named address spaces - see GCC PR sanitizer/111736.
+ #
+ depends on !KASAN
+
config CC_HAS_SLS
def_bool $(cc-option,-mharden-sls=all)
@@ -2461,12 +2474,12 @@ config CALL_PADDING
config FINEIBT
def_bool y
- depends on X86_KERNEL_IBT && CFI_CLANG && RETPOLINE
+ depends on X86_KERNEL_IBT && CFI_CLANG && MITIGATION_RETPOLINE
select CALL_PADDING
config HAVE_CALL_THUNKS
def_bool y
- depends on CC_HAS_ENTRY_PADDING && RETHUNK && OBJTOOL
+ depends on CC_HAS_ENTRY_PADDING && MITIGATION_RETHUNK && OBJTOOL
config CALL_THUNKS
def_bool n
@@ -2488,7 +2501,7 @@ menuconfig SPECULATION_MITIGATIONS
if SPECULATION_MITIGATIONS
-config PAGE_TABLE_ISOLATION
+config MITIGATION_PAGE_TABLE_ISOLATION
bool "Remove the kernel mapping in user mode"
default y
depends on (X86_64 || X86_PAE)
@@ -2499,7 +2512,7 @@ config PAGE_TABLE_ISOLATION
See Documentation/arch/x86/pti.rst for more details.
-config RETPOLINE
+config MITIGATION_RETPOLINE
bool "Avoid speculative indirect branches in kernel"
select OBJTOOL if HAVE_OBJTOOL
default y
@@ -2509,9 +2522,9 @@ config RETPOLINE
branches. Requires a compiler with -mindirect-branch=thunk-extern
support for full protection. The kernel may run slower.
-config RETHUNK
+config MITIGATION_RETHUNK
bool "Enable return-thunks"
- depends on RETPOLINE && CC_HAS_RETURN_THUNK
+ depends on MITIGATION_RETPOLINE && CC_HAS_RETURN_THUNK
select OBJTOOL if HAVE_OBJTOOL
default y if X86_64
help
@@ -2520,14 +2533,14 @@ config RETHUNK
Requires a compiler with -mfunction-return=thunk-extern
support for full protection. The kernel may run slower.
-config CPU_UNRET_ENTRY
+config MITIGATION_UNRET_ENTRY
bool "Enable UNRET on kernel entry"
- depends on CPU_SUP_AMD && RETHUNK && X86_64
+ depends on CPU_SUP_AMD && MITIGATION_RETHUNK && X86_64
default y
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
@@ -2547,7 +2560,7 @@ 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
@@ -2558,14 +2571,14 @@ config CALL_THUNKS_DEBUG
Only enable this when you are debugging call thunks as this
creates a noticeable runtime overhead. If unsure say N.
-config CPU_IBPB_ENTRY
+config MITIGATION_IBPB_ENTRY
bool "Enable IBPB on kernel entry"
depends on CPU_SUP_AMD && X86_64
default y
help
Compile the kernel with support for the retbleed=ibpb mitigation.
-config CPU_IBRS_ENTRY
+config MITIGATION_IBRS_ENTRY
bool "Enable IBRS on kernel entry"
depends on CPU_SUP_INTEL && X86_64
default y
@@ -2574,14 +2587,14 @@ config CPU_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
+ depends on CPU_SUP_AMD && X86_64 && MITIGATION_RETHUNK
default y
help
Enable the SRSO mitigation needed on AMD Zen1-4 machines.
-config SLS
+config MITIGATION_SLS
bool "Mitigate Straight-Line-Speculation"
depends on CC_HAS_SLS && X86_64
select OBJTOOL if HAVE_OBJTOOL
@@ -2591,7 +2604,7 @@ config SLS
against straight line speculation. The kernel image might be slightly
larger.
-config GDS_FORCE_MITIGATION
+config MITIGATION_GDS_FORCE
bool "Force GDS Mitigation"
depends on CPU_SUP_INTEL
default n