KVM x86: Move kvm cpuid support out of svm

Memory encryption support does not have module parameter dependencies
and can be moved into the general x86 cpuid __do_cpuid_ent function.
This changes maintains current behavior of passing through all of
CPUID.8000001F.

Suggested-by: Jim Mattson <[email protected]>
Signed-off-by: Peter Gonda <[email protected]>
Reviewed-by: Jim Mattson <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>

Author: pgonda

arch/x86/kvm/cpuid.c

@@ -778,6 +778,11 @@ static inline int __do_cpuid_func(struct kvm_cpuid_entry2 *entry, u32 function,
 	case 0x8000001a:
 	case 0x8000001e:
 		break;
+	/* Support memory encryption cpuid if host supports it */
+	case 0x8000001F:
+		if (!boot_cpu_has(X86_FEATURE_SEV))
+			entry->eax = entry->ebx = entry->ecx = entry->edx = 0;
+		break;
 	/*Add support for Centaur's CPUID instruction*/
 	case 0xC0000000:
 		/*Just support up to 0xC0000004 now*/

arch/x86/kvm/svm.c

@@ -5958,13 +5958,6 @@ static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
 		if (npt_enabled)
 			entry->edx |= F(NPT);
 
-		break;
-	case 0x8000001F:
-		/* Support memory encryption cpuid if host supports it */
-		if (boot_cpu_has(X86_FEATURE_SEV))
-			cpuid(0x8000001f, &entry->eax, &entry->ebx,
-				&entry->ecx, &entry->edx);
-
 	}
 }