AMD 2nd generation EPYC processors support the UMIP (User-Mode
Instruction Prevention) feature. So, rename X86_INTEL_UMIP to
generic X86_UMIP and modify the text to cover both Intel and AMD.
Signed-off-by: Babu Moger <babu.moger@xxxxxxx>
---
v2:
Learned that for the hardware that support UMIP, we dont need to
emulate. Removed the emulation related code and just submitting
the config changes.
arch/x86/Kconfig | 8 ++++----
arch/x86/include/asm/disabled-features.h | 2 +-
arch/x86/include/asm/umip.h | 4 ++--
arch/x86/kernel/Makefile | 2 +-
4 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index d6e1faa28c58..821b7cebff31 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1880,13 +1880,13 @@ config X86_SMAP
If unsure, say Y.
-config X86_INTEL_UMIP
+config X86_UMIP
def_bool y
- depends on CPU_SUP_INTEL
- prompt "Intel User Mode Instruction Prevention" if EXPERT
+ depends on X86 && (CPU_SUP_INTEL || CPU_SUP_AMD)
+ prompt "User Mode Instruction Prevention" if EXPERT
---help---
The User Mode Instruction Prevention (UMIP) is a security
- feature in newer Intel processors. If enabled, a general
+ feature in newer x86 processors. If enabled, a general
protection fault is issued if the SGDT, SLDT, SIDT, SMSW
or STR instructions are executed in user mode. These instructions
unnecessarily expose information about the hardware state.
diff --git a/arch/x86/include/asm/disabled-features.h b/arch/x86/include/asm/disabled-features.h
index a5ea841cc6d2..8e1d0bb46361 100644
--- a/arch/x86/include/asm/disabled-features.h
+++ b/arch/x86/include/asm/disabled-features.h
@@ -22,7 +22,7 @@
# define DISABLE_SMAP (1<<(X86_FEATURE_SMAP & 31))
#endif
-#ifdef CONFIG_X86_INTEL_UMIP
+#ifdef CONFIG_X86_UMIP
# define DISABLE_UMIP 0
#else
# define DISABLE_UMIP (1<<(X86_FEATURE_UMIP & 31))
diff --git a/arch/x86/include/asm/umip.h b/arch/x86/include/asm/umip.h
index db43f2a0d92c..aeed98c3c9e1 100644
--- a/arch/x86/include/asm/umip.h
+++ b/arch/x86/include/asm/umip.h
@@ -4,9 +4,9 @@
#include <linux/types.h>
#include <asm/ptrace.h>
-#ifdef CONFIG_X86_INTEL_UMIP
+#ifdef CONFIG_X86_UMIP
bool fixup_umip_exception(struct pt_regs *regs);
#else
static inline bool fixup_umip_exception(struct pt_regs *regs) { return false; }
-#endif /* CONFIG_X86_INTEL_UMIP */
+#endif /* CONFIG_X86_UMIP */
#endif /* _ASM_X86_UMIP_H */
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 3578ad248bc9..52ce1e239525 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -134,7 +134,7 @@ obj-$(CONFIG_EFI) += sysfb_efi.o
obj-$(CONFIG_PERF_EVENTS) += perf_regs.o
obj-$(CONFIG_TRACING) += tracepoint.o
obj-$(CONFIG_SCHED_MC_PRIO) += itmt.o
-obj-$(CONFIG_X86_INTEL_UMIP) += umip.o
+obj-$(CONFIG_X86_UMIP) += umip.o
obj-$(CONFIG_UNWINDER_ORC) += unwind_orc.o
obj-$(CONFIG_UNWINDER_FRAME_POINTER) += unwind_frame.o
