summaryrefslogtreecommitdiffstats
path: root/include/asm-i386/required-features.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-i386/required-features.h')
-rw-r--r--include/asm-i386/required-features.h34
1 files changed, 34 insertions, 0 deletions
diff --git a/include/asm-i386/required-features.h b/include/asm-i386/required-features.h
new file mode 100644
index 000000000000..9db866c1e64c
--- /dev/null
+++ b/include/asm-i386/required-features.h
@@ -0,0 +1,34 @@
+#ifndef _ASM_REQUIRED_FEATURES_H
+#define _ASM_REQUIRED_FEATURES_H 1
+
+/* Define minimum CPUID feature set for kernel These bits are checked
+ really early to actually display a visible error message before the
+ kernel dies. Only add word 0 bits here
+
+ Some requirements that are not in CPUID yet are also in the
+ CONFIG_X86_MINIMUM_CPU mode which is checked too.
+
+ The real information is in arch/i386/Kconfig.cpu, this just converts
+ the CONFIGs into a bitmask */
+
+#ifdef CONFIG_X86_PAE
+#define NEED_PAE (1<<X86_FEATURE_PAE)
+#else
+#define NEED_PAE 0
+#endif
+
+#ifdef CONFIG_X86_CMOV
+#define NEED_CMOV (1<<X86_FEATURE_CMOV)
+#else
+#define NEED_CMOV 0
+#endif
+
+#ifdef CONFIG_X86_CMPXCHG64
+#define NEED_CMPXCHG64 (1<<X86_FEATURE_CX8)
+#else
+#define NEED_CMPXCHG64 0
+#endif
+
+#define REQUIRED_MASK1 (NEED_PAE|NEED_CMOV|NEED_CMPXCHG64)
+
+#endif