x86/kvm/cpuid.c

75  * doesn't care about the CPIUD index because the index of the function in
83 	struct kvm_cpuid_entry2 *entries, int nent, u32 function, u64 index)
103 		if (e->function != function)
108 		 * matching function.  It's userspace's responsibility to not
117 		 * lookup (as opposed to emulating CPUID) for a function that's
125 			WARN_ON_ONCE(cpuid_function_is_indexed(function));
181 		if (e2[i].function != orig->function ||
290 	if (best && boot_cpu_has(X86_FEATURE_PKU) && best->function == 0x7)
500 		e2[i].function = e[i].function;
568 	cpuid_count(cpuid.function, cpuid.index,
846 					      u32 function, u32 index)
854 	entry->function = function;
856 	switch (function & 0xC0000000) {
870 			if (function > READ_ONCE(max_cpuid_80000000))
879 	cpuid_count(entry->function, entry->index,
882 	if (cpuid_function_is_indexed(function))
896 	entry->function = func;
923 static inline int __do_cpuid_func(struct kvm_cpuid_array *array, u32 function)
933 	entry = do_host_cpuid(array, function, 0);
937 	switch (function) {
948 		 * On ancient CPUs, function 2 entries are STATEFUL.  That is,
949 		 * CPUID(function=2, index=0) may return different results each
972 			entry = do_host_cpuid(array, function, i);
983 	/* function 7 has additional index. */
992 			entry = do_host_cpuid(array, function, 1);
1002 			entry = do_host_cpuid(array, function, 2);
1058 		entry = do_host_cpuid(array, function, 1);
1082 			entry = do_host_cpuid(array, function, i);
1121 		entry = do_host_cpuid(array, function, 1);
1143 			if (!do_host_cpuid(array, function, i))
1155 			if (!do_host_cpuid(array, function, i))
1479 						    u32 function, u32 index)
1482 				 function, index);
1487 					      u32 function)
1490 				 function, KVM_CPUID_INDEX_NOT_SIGNIFICANT);
1500  * A leaf is considered out-of-range if its function is higher than the maximum
1526 	u32 function = *fn_ptr;
1536 	if (function >= 0x40000000 && function <= 0x4fffffff)
1537 		class = kvm_find_cpuid_entry(vcpu, function & 0xffffff00);
1538 	else if (function >= 0xc0000000)
1541 		class = kvm_find_cpuid_entry(vcpu, function & 0x80000000);
1543 	if (class && function <= class->eax)
1555 	 * The class does not exist or the requested function is out of range;
1565 	u32 orig_function = *eax, function = *eax, index = *ecx;
1569 	entry = kvm_find_cpuid_entry_index(vcpu, function, index);
1573 		entry = get_out_of_range_cpuid_entry(vcpu, &function, index);
1582 		if (function == 7 && index == 0) {
1587 		} else if (function == 0x80000007) {
1600 		if (function == 0xb || function == 0x1f) {
1601 			entry = kvm_find_cpuid_entry_index(vcpu, function, 1);