x86 setup: handle more than 8 CPU flag words

Checkin e38e05a8 added a 9th CPU flag
word, but didn't adjust the boot code to match.  This patch adds the
necessary boot code support.

Note: due to a typo in an #if statement, it didn't trigger the #error
this was supposed to do.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

arch/x86/boot/cpu.c

@@ -59,17 +59,18 @@ int validate_cpu(void)
 			u32 e = err_flags[i];
 
 			for (j = 0; j < 32; j++) {
-				int n = (i << 5)+j;
-				if (*msg_strs < n) {
+				if (msg_strs[0] < i ||
+				    (msg_strs[0] == i && msg_strs[1] < j)) {
 					/* Skip to the next string */
-					do {
-						msg_strs++;
-					} while (*msg_strs);
-					msg_strs++;
+					msg_strs += 2;
+					while (*msg_strs++)
+						;
 				}
 				if (e & 1) {
-					if (*msg_strs == n && msg_strs[1])
-						printf("%s ", msg_strs+1);
+					if (msg_strs[0] == i &&
+					    msg_strs[1] == j &&
+					    msg_strs[2])
+						printf("%s ", msg_strs+2);
 					else
 						printf("%d:%d ", i, j);
 				}

arch/x86/boot/mkcpustr.c

@@ -17,31 +17,31 @@
 
 #include "../kernel/cpu/capflags.c"
 
-#if NCAPFLAGS > 8
-# error "Need to adjust the boot code handling of CPUID strings"
-#endif
-
 int main(void)
 {
-	int i;
+	int i, j;
 	const char *str;
 
 	printf("static const char x86_cap_strs[] = \n");
 
-	for (i = 0; i < NCAPINTS*32; i++) {
-		str = x86_cap_flags[i];
+	for (i = 0; i < NCAPINTS; i++) {
+		for (j = 0; j < 32; j++) {
+			str = x86_cap_flags[i*32+j];
 
-		if (i == NCAPINTS*32-1) {
+			if (i == NCAPINTS-1 && j == 31) {
 				/* The last entry must be unconditional; this
-			   also consumes the compiler-added null character */
+				   also consumes the compiler-added null
+				   character */
 				if (!str)
 					str = "";
-			printf("\t\"\\x%02x\"\"%s\"\n", i, str);
+				printf("\t\"\\x%02x\\x%02x\"\"%s\"\n",
+				       i, j, str);
 			} else if (str) {
 				printf("#if REQUIRED_MASK%d & (1 << %d)\n"
-			       "\t\"\\x%02x\"\"%s\\0\"\n"
+				       "\t\"\\x%02x\\x%02x\"\"%s\\0\"\n"
 				       "#endif\n",
-			       i >> 5, i & 31, i, str);
+				       i, j, i, j, str);
+			}
 		}
 	}
 	printf("\t;\n");