[PATCH] CPUID bug and inconsistency fix

The recent support for K8 multicore was misported from x86-64 to i386, due
to an unnecessary inconsistency between the CPUID code.  Sure, there is are
no x86-64 VIA chips yet, but it should happen eventually.

This patch fixes the i386 bug as well as makes x86-64 match i386 in the
handing of the CPUID array.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 20 insertions, 8 deletions

diff --git a/arch/x86_64/kernel/setup.c b/arch/x86_64/kernel/setup.c
index b18c114c7648..2959ce703df9 100644
--- a/arch/x86_64/kernel/setup.c
+++ b/arch/x86_64/kernel/setup.c
@@ -977,7 +977,7 @@ void __init identify_cpu(struct cpuinfo_x86 *c)
         if ((xlvl & 0xffff0000) == 0x80000000) {
                 if (xlvl >= 0x80000001) {
                         c->x86_capability[1] = cpuid_edx(0x80000001);
-                        c->x86_capability[5] = cpuid_ecx(0x80000001);
+                        c->x86_capability[6] = cpuid_ecx(0x80000001);
                 }
                 if (xlvl >= 0x80000004)
                         get_model_name(c); /* Default name */
@@ -1100,11 +1100,17 @@ static int show_cpuinfo(struct seq_file *m, void *v)
                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 
+                /* VIA/Cyrix/Centaur-defined */
+                NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",
+                NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+                NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+                NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+
                 /* AMD-defined (#2) */
                 "lahf_lm", "cmp_legacy", NULL, NULL, NULL, NULL, NULL, NULL,
                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
                 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-                NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
+                NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
         };
         static char *x86_power_flags[] = { 
                 "ts",   /* temperature sensor */
diff --git a/include/asm-i386/cpufeature.h b/include/asm-i386/cpufeature.h
index e147cabd3bfe..ff1187e80c32 100644
--- a/include/asm-i386/cpufeature.h
+++ b/include/asm-i386/cpufeature.h
@@ -87,8 +87,8 @@
 #define X86_FEATURE_XCRYPT_EN   (5*32+ 7) /* on-CPU crypto enabled */
 
 /* More extended AMD flags: CPUID level 0x80000001, ecx, word 6 */
-#define X86_FEATURE_LAHF_LM     (5*32+ 0) /* LAHF/SAHF in long mode */
-#define X86_FEATURE_CMP_LEGACY  (5*32+ 1) /* If yes HyperThreading not valid */
+#define X86_FEATURE_LAHF_LM     (6*32+ 0) /* LAHF/SAHF in long mode */
+#define X86_FEATURE_CMP_LEGACY  (6*32+ 1) /* If yes HyperThreading not valid */
 
 #define cpu_has(c, bit)         test_bit(bit, (c)->x86_capability)
 #define boot_cpu_has(bit)       test_bit(bit, boot_cpu_data.x86_capability)
diff --git a/include/asm-x86_64/cpufeature.h b/include/asm-x86_64/cpufeature.h
index e68ad97a6319..aea308c65709 100644
--- a/include/asm-x86_64/cpufeature.h
+++ b/include/asm-x86_64/cpufeature.h
@@ -7,7 +7,7 @@
 #ifndef __ASM_X8664_CPUFEATURE_H
 #define __ASM_X8664_CPUFEATURE_H
 
-#define NCAPINTS        6
+#define NCAPINTS        7       /* N 32-bit words worth of info */
 
 /* Intel-defined CPU features, CPUID level 0x00000001, word 0 */
 #define X86_FEATURE_FPU         (0*32+ 0) /* Onboard FPU */
@@ -74,9 +74,15 @@
 #define X86_FEATURE_CX16        (4*32+13) /* CMPXCHG16B */
 #define X86_FEATURE_XTPR        (4*32+14) /* Send Task Priority Messages */
 
-/* More extended AMD flags: CPUID level 0x80000001, ecx, word 5 */
-#define X86_FEATURE_LAHF_LM     (5*32+ 0) /* LAHF/SAHF in long mode */
-#define X86_FEATURE_CMP_LEGACY  (5*32+ 1) /* If yes HyperThreading not valid */
+/* VIA/Cyrix/Centaur-defined CPU features, CPUID level 0xC0000001, word 5 */
+#define X86_FEATURE_XSTORE      (5*32+ 2) /* on-CPU RNG present (xstore insn) */
+#define X86_FEATURE_XSTORE_EN   (5*32+ 3) /* on-CPU RNG enabled */
+#define X86_FEATURE_XCRYPT      (5*32+ 6) /* on-CPU crypto (xcrypt insn) */
+#define X86_FEATURE_XCRYPT_EN   (5*32+ 7) /* on-CPU crypto enabled */
+
+/* More extended AMD flags: CPUID level 0x80000001, ecx, word 6 */
+#define X86_FEATURE_LAHF_LM     (6*32+ 0) /* LAHF/SAHF in long mode */
+#define X86_FEATURE_CMP_LEGACY  (6*32+ 1) /* If yes HyperThreading not valid */
 
 #define cpu_has(c, bit)                test_bit(bit, (c)->x86_capability)
 #define boot_cpu_has(bit)      test_bit(bit, boot_cpu_data.x86_capability)