1 #ifndef __X86_CPUID_H__
2 #define __X86_CPUID_H__
3 
4 #include <asm/cpufeatureset.h>
5 
6 #ifndef __ASSEMBLY__
7 #include <xen/types.h>
8 #include <xen/kernel.h>
9 #include <xen/percpu.h>
10 
11 #include <xen/lib/x86/cpu-policy.h>
12 #include <xen/lib/x86/cpuid.h>
13 
14 #include <public/sysctl.h>
15 
16 extern const uint32_t known_features[FSCAPINTS];
17 extern const uint32_t special_features[FSCAPINTS];
18 
19 void init_guest_cpuid(void);
20 
21 /*
22  * Expected levelling capabilities (given cpuid vendor/family information),
23  * and levelling capabilities actually available (given MSR probing).
24  */
25 #define LCAP_faulting XEN_SYSCTL_CPU_LEVELCAP_faulting
26 #define LCAP_1cd      (XEN_SYSCTL_CPU_LEVELCAP_ecx |        \
27                        XEN_SYSCTL_CPU_LEVELCAP_edx)
28 #define LCAP_e1cd     (XEN_SYSCTL_CPU_LEVELCAP_extd_ecx |   \
29                        XEN_SYSCTL_CPU_LEVELCAP_extd_edx)
30 #define LCAP_Da1      XEN_SYSCTL_CPU_LEVELCAP_xsave_eax
31 #define LCAP_6c       XEN_SYSCTL_CPU_LEVELCAP_thermal_ecx
32 #define LCAP_7ab0     (XEN_SYSCTL_CPU_LEVELCAP_l7s0_eax |   \
33                        XEN_SYSCTL_CPU_LEVELCAP_l7s0_ebx)
34 extern unsigned int expected_levelling_cap, levelling_caps;
35 
36 struct cpuidmasks
37 {
38     uint64_t _1cd;
39     uint64_t e1cd;
40     uint64_t Da1;
41     uint64_t _6c;
42     uint64_t _7ab0;
43 };
44 
45 /* Per CPU shadows of masking MSR values, for lazy context switching. */
46 DECLARE_PER_CPU(struct cpuidmasks, cpuidmasks);
47 
48 /* Default masking MSR values, calculated at boot. */
49 extern struct cpuidmasks cpuidmask_defaults;
50 
51 extern struct cpuid_policy raw_cpuid_policy, host_cpuid_policy,
52     pv_max_cpuid_policy, pv_def_cpuid_policy,
53     hvm_max_cpuid_policy, hvm_def_cpuid_policy;
54 
55 extern const struct cpu_policy system_policies[];
56 
57 /* Check that all previously present features are still available. */
58 bool recheck_cpu_features(unsigned int cpu);
59 
60 /* Allocate and initialise a CPUID policy suitable for the domain. */
61 int init_domain_cpuid_policy(struct domain *d);
62 
63 /* Clamp the CPUID policy to reality. */
64 void recalculate_cpuid_policy(struct domain *d);
65 
66 struct vcpu;
67 void guest_cpuid(const struct vcpu *v, uint32_t leaf,
68                  uint32_t subleaf, struct cpuid_leaf *res);
69 
70 #endif /* __ASSEMBLY__ */
71 #endif /* !__X86_CPUID_H__ */
72 
73 /*
74  * Local variables:
75  * mode: C
76  * c-file-style: "BSD"
77  * c-basic-offset: 4
78  * tab-width: 4
79  * indent-tabs-mode: nil
80  * End:
81  */
82