1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright © 2019 Oracle and/or its affiliates. All rights reserved.
4 * Copyright © 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
9 #ifndef __ARCH_X86_KVM_XEN_H__
10 #define __ARCH_X86_KVM_XEN_H__
13 #include <linux/jump_label_ratelimit.h>
15 extern struct static_key_false_deferred kvm_xen_enabled;
17 int __kvm_xen_has_interrupt(struct kvm_vcpu *vcpu);
18 void kvm_xen_inject_pending_events(struct kvm_vcpu *vcpu);
19 int kvm_xen_vcpu_set_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data);
20 int kvm_xen_vcpu_get_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data);
21 int kvm_xen_hvm_set_attr(struct kvm *kvm, struct kvm_xen_hvm_attr *data);
22 int kvm_xen_hvm_get_attr(struct kvm *kvm, struct kvm_xen_hvm_attr *data);
23 int kvm_xen_hvm_evtchn_send(struct kvm *kvm, struct kvm_irq_routing_xen_evtchn *evt);
24 int kvm_xen_write_hypercall_page(struct kvm_vcpu *vcpu, u64 data);
25 int kvm_xen_hvm_config(struct kvm *kvm, struct kvm_xen_hvm_config *xhc);
26 void kvm_xen_init_vm(struct kvm *kvm);
27 void kvm_xen_destroy_vm(struct kvm *kvm);
28 void kvm_xen_init_vcpu(struct kvm_vcpu *vcpu);
29 void kvm_xen_destroy_vcpu(struct kvm_vcpu *vcpu);
30 int kvm_xen_set_evtchn_fast(struct kvm_xen_evtchn *xe,
32 int kvm_xen_setup_evtchn(struct kvm *kvm,
33 struct kvm_kernel_irq_routing_entry *e,
34 const struct kvm_irq_routing_entry *ue);
36 static inline bool kvm_xen_msr_enabled(struct kvm *kvm)
38 return static_branch_unlikely(&kvm_xen_enabled.key) &&
39 kvm->arch.xen_hvm_config.msr;
42 static inline bool kvm_xen_hypercall_enabled(struct kvm *kvm)
44 return static_branch_unlikely(&kvm_xen_enabled.key) &&
45 (kvm->arch.xen_hvm_config.flags &
46 KVM_XEN_HVM_CONFIG_INTERCEPT_HCALL);
49 static inline int kvm_xen_has_interrupt(struct kvm_vcpu *vcpu)
51 if (static_branch_unlikely(&kvm_xen_enabled.key) &&
52 vcpu->arch.xen.vcpu_info_cache.active &&
53 vcpu->kvm->arch.xen.upcall_vector)
54 return __kvm_xen_has_interrupt(vcpu);
59 static inline bool kvm_xen_has_pending_events(struct kvm_vcpu *vcpu)
61 return static_branch_unlikely(&kvm_xen_enabled.key) &&
62 vcpu->arch.xen.evtchn_pending_sel;
65 static inline bool kvm_xen_timer_enabled(struct kvm_vcpu *vcpu)
67 return !!vcpu->arch.xen.timer_virq;
70 static inline int kvm_xen_has_pending_timer(struct kvm_vcpu *vcpu)
72 if (kvm_xen_hypercall_enabled(vcpu->kvm) && kvm_xen_timer_enabled(vcpu))
73 return atomic_read(&vcpu->arch.xen.timer_pending);
78 void kvm_xen_inject_timer_irqs(struct kvm_vcpu *vcpu);
80 static inline int kvm_xen_write_hypercall_page(struct kvm_vcpu *vcpu, u64 data)
85 static inline void kvm_xen_init_vm(struct kvm *kvm)
89 static inline void kvm_xen_destroy_vm(struct kvm *kvm)
93 static inline void kvm_xen_init_vcpu(struct kvm_vcpu *vcpu)
97 static inline void kvm_xen_destroy_vcpu(struct kvm_vcpu *vcpu)
101 static inline bool kvm_xen_msr_enabled(struct kvm *kvm)
106 static inline bool kvm_xen_hypercall_enabled(struct kvm *kvm)
111 static inline int kvm_xen_has_interrupt(struct kvm_vcpu *vcpu)
116 static inline void kvm_xen_inject_pending_events(struct kvm_vcpu *vcpu)
120 static inline bool kvm_xen_has_pending_events(struct kvm_vcpu *vcpu)
125 static inline int kvm_xen_has_pending_timer(struct kvm_vcpu *vcpu)
130 static inline void kvm_xen_inject_timer_irqs(struct kvm_vcpu *vcpu)
134 static inline bool kvm_xen_timer_enabled(struct kvm_vcpu *vcpu)
140 int kvm_xen_hypercall(struct kvm_vcpu *vcpu);
142 #include <asm/pvclock-abi.h>
143 #include <asm/xen/interface.h>
144 #include <xen/interface/vcpu.h>
146 void kvm_xen_update_runstate_guest(struct kvm_vcpu *vcpu, int state);
148 static inline void kvm_xen_runstate_set_running(struct kvm_vcpu *vcpu)
150 kvm_xen_update_runstate_guest(vcpu, RUNSTATE_running);
153 static inline void kvm_xen_runstate_set_preempted(struct kvm_vcpu *vcpu)
156 * If the vCPU wasn't preempted but took a normal exit for
157 * some reason (hypercalls, I/O, etc.), that is accounted as
158 * still RUNSTATE_running, as the VMM is still operating on
159 * behalf of the vCPU. Only if the VMM does actually block
160 * does it need to enter RUNSTATE_blocked.
162 if (WARN_ON_ONCE(!vcpu->preempted))
165 kvm_xen_update_runstate_guest(vcpu, RUNSTATE_runnable);
168 /* 32-bit compatibility definitions, also used natively in 32-bit build */
169 struct compat_arch_vcpu_info {
174 struct compat_vcpu_info {
175 uint8_t evtchn_upcall_pending;
176 uint8_t evtchn_upcall_mask;
178 uint32_t evtchn_pending_sel;
179 struct compat_arch_vcpu_info arch;
180 struct pvclock_vcpu_time_info time;
181 }; /* 64 bytes (x86) */
183 struct compat_arch_shared_info {
184 unsigned int max_pfn;
185 unsigned int pfn_to_mfn_frame_list_list;
186 unsigned int nmi_reason;
187 unsigned int p2m_cr3;
188 unsigned int p2m_vaddr;
189 unsigned int p2m_generation;
193 struct compat_shared_info {
194 struct compat_vcpu_info vcpu_info[MAX_VIRT_CPUS];
195 uint32_t evtchn_pending[32];
196 uint32_t evtchn_mask[32];
197 struct pvclock_wall_clock wc;
198 struct compat_arch_shared_info arch;
201 #define COMPAT_EVTCHN_2L_NR_CHANNELS (8 * \
202 sizeof_field(struct compat_shared_info, \
204 struct compat_vcpu_runstate_info {
206 uint64_t state_entry_time;
208 } __attribute__((packed));
210 #endif /* __ARCH_X86_KVM_XEN_H__ */