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-rw-r--r--arch/x86/kernel/cpu/mkcapflags.sh41
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/mkcapflags.sh b/arch/x86/kernel/cpu/mkcapflags.sh
new file mode 100644
index 000000000000..2bf616505499
--- /dev/null
+++ b/arch/x86/kernel/cpu/mkcapflags.sh
@@ -0,0 +1,41 @@
+#!/bin/sh
+#
+# Generate the x86_cap_flags[] array from include/asm/cpufeature.h
+#
+
+IN=$1
+OUT=$2
+
+TABS="$(printf '\t\t\t\t\t')"
+trap 'rm "$OUT"' EXIT
+
+(
+ echo "#ifndef _ASM_X86_CPUFEATURE_H"
+ echo "#include <asm/cpufeature.h>"
+ echo "#endif"
+ echo ""
+ echo "const char * const x86_cap_flags[NCAPINTS*32] = {"
+
+ # Iterate through any input lines starting with #define X86_FEATURE_
+ sed -n -e 's/\t/ /g' -e 's/^ *# *define *X86_FEATURE_//p' $IN |
+ while read i
+ do
+ # Name is everything up to the first whitespace
+ NAME="$(echo "$i" | sed 's/ .*//')"
+
+ # If the /* comment */ starts with a quote string, grab that.
+ VALUE="$(echo "$i" | sed -n 's@.*/\* *\("[^"]*"\).*\*/@\1@p')"
+ [ -z "$VALUE" ] && VALUE="\"$NAME\""
+ [ "$VALUE" == '""' ] && continue
+
+ # Name is uppercase, VALUE is all lowercase
+ VALUE="$(echo "$VALUE" | tr A-Z a-z)"
+
+ TABCOUNT=$(( ( 5*8 - 14 - $(echo "$NAME" | wc -c) ) / 8 ))
+ printf "\t[%s]%.*s = %s,\n" \
+ "X86_FEATURE_$NAME" "$TABCOUNT" "$TABS" "$VALUE"
+ done
+ echo "};"
+) > $OUT
+
+trap - EXIT