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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef ASM_KVM_CACHE_REGS_H
3#define ASM_KVM_CACHE_REGS_H
4
5#include <linux/kvm_host.h>
6
7#define KVM_POSSIBLE_CR0_GUEST_BITS X86_CR0_TS
8#define KVM_POSSIBLE_CR4_GUEST_BITS \
9 (X86_CR4_PVI | X86_CR4_DE | X86_CR4_PCE | X86_CR4_OSFXSR \
10 | X86_CR4_OSXMMEXCPT | X86_CR4_LA57 | X86_CR4_PGE)
11
12static inline unsigned long kvm_register_read(struct kvm_vcpu *vcpu,
13 enum kvm_reg reg)
14{
15 if (!test_bit(reg, (unsigned long *)&vcpu->arch.regs_avail))
16 kvm_x86_ops->cache_reg(vcpu, reg);
17
18 return vcpu->arch.regs[reg];
19}
20
21static inline void kvm_register_write(struct kvm_vcpu *vcpu,
22 enum kvm_reg reg,
23 unsigned long val)
24{
25 vcpu->arch.regs[reg] = val;
26 __set_bit(reg, (unsigned long *)&vcpu->arch.regs_dirty);
27 __set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail);
28}
29
30static inline unsigned long kvm_rip_read(struct kvm_vcpu *vcpu)
31{
32 return kvm_register_read(vcpu, VCPU_REGS_RIP);
33}
34
35static inline void kvm_rip_write(struct kvm_vcpu *vcpu, unsigned long val)
36{
37 kvm_register_write(vcpu, VCPU_REGS_RIP, val);
38}
39
40static inline u64 kvm_pdptr_read(struct kvm_vcpu *vcpu, int index)
41{
42 might_sleep(); /* on svm */
43
44 if (!test_bit(VCPU_EXREG_PDPTR,
45 (unsigned long *)&vcpu->arch.regs_avail))
46 kvm_x86_ops->cache_reg(vcpu, (enum kvm_reg)VCPU_EXREG_PDPTR);
47
48 return vcpu->arch.walk_mmu->pdptrs[index];
49}
50
51static inline ulong kvm_read_cr0_bits(struct kvm_vcpu *vcpu, ulong mask)
52{
53 ulong tmask = mask & KVM_POSSIBLE_CR0_GUEST_BITS;
54 if (tmask & vcpu->arch.cr0_guest_owned_bits)
55 kvm_x86_ops->decache_cr0_guest_bits(vcpu);
56 return vcpu->arch.cr0 & mask;
57}
58
59static inline ulong kvm_read_cr0(struct kvm_vcpu *vcpu)
60{
61 return kvm_read_cr0_bits(vcpu, ~0UL);
62}
63
64static inline ulong kvm_read_cr4_bits(struct kvm_vcpu *vcpu, ulong mask)
65{
66 ulong tmask = mask & KVM_POSSIBLE_CR4_GUEST_BITS;
67 if (tmask & vcpu->arch.cr4_guest_owned_bits)
68 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
69 return vcpu->arch.cr4 & mask;
70}
71
72static inline ulong kvm_read_cr3(struct kvm_vcpu *vcpu)
73{
74 if (!test_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail))
75 kvm_x86_ops->decache_cr3(vcpu);
76 return vcpu->arch.cr3;
77}
78
79static inline ulong kvm_read_cr4(struct kvm_vcpu *vcpu)
80{
81 return kvm_read_cr4_bits(vcpu, ~0UL);
82}
83
84static inline u64 kvm_read_edx_eax(struct kvm_vcpu *vcpu)
85{
86 return (kvm_register_read(vcpu, VCPU_REGS_RAX) & -1u)
87 | ((u64)(kvm_register_read(vcpu, VCPU_REGS_RDX) & -1u) << 32);
88}
89
90static inline void enter_guest_mode(struct kvm_vcpu *vcpu)
91{
92 vcpu->arch.hflags |= HF_GUEST_MASK;
93}
94
95static inline void leave_guest_mode(struct kvm_vcpu *vcpu)
96{
97 vcpu->arch.hflags &= ~HF_GUEST_MASK;
98
99 if (vcpu->arch.load_eoi_exitmap_pending) {
100 vcpu->arch.load_eoi_exitmap_pending = false;
101 kvm_make_request(KVM_REQ_LOAD_EOI_EXITMAP, vcpu);
102 }
103}
104
105static inline bool is_guest_mode(struct kvm_vcpu *vcpu)
106{
107 return vcpu->arch.hflags & HF_GUEST_MASK;
108}
109
110static inline bool is_smm(struct kvm_vcpu *vcpu)
111{
112 return vcpu->arch.hflags & HF_SMM_MASK;
113}
114
115#endif