xnu-2050.48.11.tar.gz

[apple/xnu.git] / osfmk / i386 / machine_check.c

diff --git a/osfmk/i386/machine_check.c b/osfmk/i386/machine_check.c
index 64b0c9b8d41b8dd295c4102cd866ef4a4aeab9a8..c70168b3c7529a38dd64f64f14e7a99bebef64d9 100644 (file)
--- a/osfmk/i386/machine_check.c
+++ b/osfmk/i386/machine_check.c
@@ -89,12 +89,19 @@ static void
 mca_get_availability(void)
 {
        uint64_t        features = cpuid_info()->cpuid_features;
-       uint32_t        family =  cpuid_info()->cpuid_family;
+       uint32_t        family =   cpuid_info()->cpuid_family;
+       uint32_t        model =    cpuid_info()->cpuid_model;
+       uint32_t        stepping = cpuid_info()->cpuid_stepping;
 
        mca_MCE_present = (features & CPUID_FEATURE_MCE) != 0;
        mca_MCA_present = (features & CPUID_FEATURE_MCA) != 0;
        mca_family = family;
-       
+
+       if ((model == CPUID_MODEL_HASWELL     && stepping < 3) ||
+           (model == CPUID_MODEL_HASWELL_ULT && stepping < 1) ||
+           (model == CPUID_MODEL_CRYSTALWELL && stepping < 1))
+               panic("Haswell pre-C0 steppings are not supported");
+
        /*
         * If MCA, the number of banks etc is reported by the IA32_MCG_CAP MSR.
         */