gpllib: fix call to CPUID function 4

Only call CPUID function 4 if cpuid_level indicates its availability.

Signed-off-by: Sebastian Herbszt <herbszt@gmx.de>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

diff --git a/com32/gpllib/cpuid.c b/com32/gpllib/cpuid.c
index fa21204..f33e895 100644 (file)
--- a/com32/gpllib/cpuid.c
+++ b/com32/gpllib/cpuid.c
@@ -232,8 +232,10 @@ void generic_identify(struct cpuinfo_x86 *c)
        }
        break;
     case X86_VENDOR_INTEL:
-       cpuid(0x4, &eax, &ebx, &ecx, &edx);
-       c->x86_num_cores = ((eax & 0xfc000000) >> 26) + 1;
+       if (c->cpuid_level >= 0x00000004) {
+           cpuid(0x4, &eax, &ebx, &ecx, &edx);
+           c->x86_num_cores = ((eax & 0xfc000000) >> 26) + 1;
+       }
        break;
     default:
        c->x86_num_cores = 1;