KVM: VMX: Enable XSAVE/XRSTOR for guest
[linux-3.10.git] / arch / x86 / kvm / kvm_cache_regs.h
1 #ifndef ASM_KVM_CACHE_REGS_H
2 #define ASM_KVM_CACHE_REGS_H
3
4 #define KVM_POSSIBLE_CR0_GUEST_BITS X86_CR0_TS
5 #define KVM_POSSIBLE_CR4_GUEST_BITS                               \
6         (X86_CR4_PVI | X86_CR4_DE | X86_CR4_PCE | X86_CR4_OSFXSR  \
7          | X86_CR4_OSXMMEXCPT | X86_CR4_PGE)
8
9 static inline unsigned long kvm_register_read(struct kvm_vcpu *vcpu,
10                                               enum kvm_reg reg)
11 {
12         if (!test_bit(reg, (unsigned long *)&vcpu->arch.regs_avail))
13                 kvm_x86_ops->cache_reg(vcpu, reg);
14
15         return vcpu->arch.regs[reg];
16 }
17
18 static inline void kvm_register_write(struct kvm_vcpu *vcpu,
19                                       enum kvm_reg reg,
20                                       unsigned long val)
21 {
22         vcpu->arch.regs[reg] = val;
23         __set_bit(reg, (unsigned long *)&vcpu->arch.regs_dirty);
24         __set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail);
25 }
26
27 static inline unsigned long kvm_rip_read(struct kvm_vcpu *vcpu)
28 {
29         return kvm_register_read(vcpu, VCPU_REGS_RIP);
30 }
31
32 static inline void kvm_rip_write(struct kvm_vcpu *vcpu, unsigned long val)
33 {
34         kvm_register_write(vcpu, VCPU_REGS_RIP, val);
35 }
36
37 static inline u64 kvm_pdptr_read(struct kvm_vcpu *vcpu, int index)
38 {
39         might_sleep();  /* on svm */
40
41         if (!test_bit(VCPU_EXREG_PDPTR,
42                       (unsigned long *)&vcpu->arch.regs_avail))
43                 kvm_x86_ops->cache_reg(vcpu, VCPU_EXREG_PDPTR);
44
45         return vcpu->arch.pdptrs[index];
46 }
47
48 static inline ulong kvm_read_cr0_bits(struct kvm_vcpu *vcpu, ulong mask)
49 {
50         ulong tmask = mask & KVM_POSSIBLE_CR0_GUEST_BITS;
51         if (tmask & vcpu->arch.cr0_guest_owned_bits)
52                 kvm_x86_ops->decache_cr0_guest_bits(vcpu);
53         return vcpu->arch.cr0 & mask;
54 }
55
56 static inline ulong kvm_read_cr0(struct kvm_vcpu *vcpu)
57 {
58         return kvm_read_cr0_bits(vcpu, ~0UL);
59 }
60
61 static inline ulong kvm_read_cr4_bits(struct kvm_vcpu *vcpu, ulong mask)
62 {
63         ulong tmask = mask & KVM_POSSIBLE_CR4_GUEST_BITS;
64         if (tmask & vcpu->arch.cr4_guest_owned_bits)
65                 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
66         return vcpu->arch.cr4 & mask;
67 }
68
69 static inline ulong kvm_read_cr4(struct kvm_vcpu *vcpu)
70 {
71         return kvm_read_cr4_bits(vcpu, ~0UL);
72 }
73
74 static inline u64 kvm_read_edx_eax(struct kvm_vcpu *vcpu)
75 {
76         return (kvm_register_read(vcpu, VCPU_REGS_RAX) & -1u)
77                 | ((u64)(kvm_register_read(vcpu, VCPU_REGS_RDX) & -1u) << 32);
78 }
79
80 #endif