Re: [PATCH v6 3/4] Mask function7 ebx against host capability word9

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On 05/30/2011 06:17 PM, Yang, Wei Y wrote:
This patch masks CPUID leaf 7 ebx against host capability word9.

@@ -2404,6 +2408,15 @@ static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
  		}
  		break;
  	}
+	case 7: {
+		/* Mask ebx against host capbability word 9 */
+		if (index == 0) {
+			entry->ebx&= kvm_supported_word9_x86_features;
+			cpuid_mask(&entry->edx, 9);
+		}
+		break;
+	}
+	/* function 0xb has additional index. */

I see that function 7 also depends on ecx, so it should set KVM_CPUID_FLAG_SIGNIFCANT_INDEX.

We should mask off ecx != 0 and all the reserved words, since we don't support the features in them.

--
error compiling committee.c: too many arguments to function

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