4  * cpuid support routines
21 #include "cpuid.h"
100 	 * save the feature bitmap to avoid cpuid lookup for every PV  in kvm_update_pv_runtime()
227 			     struct kvm_cpuid *cpuid,  in kvm_vcpu_ioctl_set_cpuid()  argument
234 	if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)  in kvm_vcpu_ioctl_set_cpuid()
237 	if (cpuid->nent) {  in kvm_vcpu_ioctl_set_cpuid()
238 		e = vmemdup_user(entries, array_size(sizeof(*e), cpuid->nent));  in kvm_vcpu_ioctl_set_cpuid()
242 		e2 = kvmalloc_array(cpuid->nent, sizeof(*e2), GFP_KERNEL_ACCOUNT);  in kvm_vcpu_ioctl_set_cpuid()
248 	for (i = 0; i < cpuid->nent; i++) {  in kvm_vcpu_ioctl_set_cpuid()
261 	r = kvm_check_cpuid(e2, cpuid->nent);  in kvm_vcpu_ioctl_set_cpuid()
269 	vcpu->arch.cpuid_nent = cpuid->nent;  in kvm_vcpu_ioctl_set_cpuid()
282 			      struct kvm_cpuid2 *cpuid,  in kvm_vcpu_ioctl_set_cpuid2()  argument
288 	if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)  in kvm_vcpu_ioctl_set_cpuid2()
291 	if (cpuid->nent) {  in kvm_vcpu_ioctl_set_cpuid2()
292 		e2 = vmemdup_user(entries, array_size(sizeof(*e2), cpuid->nent));  in kvm_vcpu_ioctl_set_cpuid2()
297 	r = kvm_check_cpuid(e2, cpuid->nent);  in kvm_vcpu_ioctl_set_cpuid2()
305 	vcpu->arch.cpuid_nent = cpuid->nent;  in kvm_vcpu_ioctl_set_cpuid2()
314 			      struct kvm_cpuid2 *cpuid,  in kvm_vcpu_ioctl_get_cpuid2()  argument
320 	if (cpuid->nent < vcpu->arch.cpuid_nent)  in kvm_vcpu_ioctl_get_cpuid2()
329 	cpuid->nent = vcpu->arch.cpuid_nent;  in kvm_vcpu_ioctl_get_cpuid2()
335 	const struct cpuid_reg cpuid = x86_feature_cpuid(leaf * 32);  in kvm_cpu_cap_mask()  local
341 	cpuid_count(cpuid.function, cpuid.index,  in kvm_cpu_cap_mask()
344 	kvm_cpu_caps[leaf] &= *__cpuid_entry_get_reg(&entry, cpuid.reg);  in kvm_cpu_cap_mask()
367 		 * advertised to guests via CPUID!  in kvm_set_cpu_caps()
610 		 * CPUID(function=2, index=0) may return different results each  in __do_cpuid_func()
612 		 * number of times software should do CPUID(2, 0).  in __do_cpuid_func()
618 		 * APM states that CPUID(2) is reserved.  in __do_cpuid_func()
621 		 * a stateful CPUID.0x2 is encountered.  in __do_cpuid_func()
704 		 * previous entry is zero.  Note, CPUID EAX.{0x1f,0xb}.0 is  in __do_cpuid_func()
818 		/* invariant TSC is CPUID.80000007H:EDX[8] */  in __do_cpuid_func()
853 	/* Support memory encryption cpuid if host supports it */  in __do_cpuid_func()
858 	/*Add support for Centaur's CPUID instruction*/  in __do_cpuid_func()
946 int kvm_dev_ioctl_get_cpuid(struct kvm_cpuid2 *cpuid,  in kvm_dev_ioctl_get_cpuid()  argument
959 	if (cpuid->nent < 1)  in kvm_dev_ioctl_get_cpuid()
961 	if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)  in kvm_dev_ioctl_get_cpuid()
962 		cpuid->nent = KVM_MAX_CPUID_ENTRIES;  in kvm_dev_ioctl_get_cpuid()
964 	if (sanity_check_entries(entries, cpuid->nent, type))  in kvm_dev_ioctl_get_cpuid()
968 					   cpuid->nent));  in kvm_dev_ioctl_get_cpuid()
972 	array.maxnent = cpuid->nent;  in kvm_dev_ioctl_get_cpuid()
979 	cpuid->nent = array.nent;  in kvm_dev_ioctl_get_cpuid()
999  * Intel CPUID semantics treats any query for an out-of-range leaf as if the
1000  * highest basic leaf (i.e. CPUID.0H:EAX) were requested.  AMD CPUID semantics
1010  * class exists if a guest CPUID entry for its <base> leaf exists.  For a given
1011  * class, CPUID.<base>.EAX contains the max supported leaf for the class.
1021  * CPUID sub-classes are:
1053 	 * entry for CPUID.0xb.index (see below), then the output value for EDX  in get_out_of_range_cpuid_entry()
1054 	 * needs to be pulled from CPUID.0xb.1.  in get_out_of_range_cpuid_entry()
1060 	 * the effective CPUID entry is the max basic leaf.  Note, the index of  in get_out_of_range_cpuid_entry()