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__
12 #include <asm/xen/hypervisor.h>
15 #include <linux/jump_label_ratelimit.h>
17 extern struct static_key_false_deferred kvm_xen_enabled;
19 int __kvm_xen_has_interrupt(struct kvm_vcpu *vcpu);
20 void kvm_xen_inject_pending_events(struct kvm_vcpu *vcpu);
21 int kvm_xen_vcpu_set_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data);
22 int kvm_xen_vcpu_get_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data);
23 int kvm_xen_hvm_set_attr(struct kvm *kvm, struct kvm_xen_hvm_attr *data);
24 int kvm_xen_hvm_get_attr(struct kvm *kvm, struct kvm_xen_hvm_attr *data);
25 int kvm_xen_hvm_evtchn_send(struct kvm *kvm, struct kvm_irq_routing_xen_evtchn *evt);
26 int kvm_xen_write_hypercall_page(struct kvm_vcpu *vcpu, u64 data);
27 int kvm_xen_hvm_config(struct kvm *kvm, struct kvm_xen_hvm_config *xhc);
28 void kvm_xen_init_vm(struct kvm *kvm);
29 void kvm_xen_destroy_vm(struct kvm *kvm);
30 void kvm_xen_init_vcpu(struct kvm_vcpu *vcpu);
31 void kvm_xen_destroy_vcpu(struct kvm_vcpu *vcpu);
32 int kvm_xen_set_evtchn_fast(struct kvm_xen_evtchn *xe,
34 int kvm_xen_setup_evtchn(struct kvm *kvm,
35 struct kvm_kernel_irq_routing_entry *e,
36 const struct kvm_irq_routing_entry *ue);
37 void kvm_xen_update_tsc_info(struct kvm_vcpu *vcpu);
39 static inline bool kvm_xen_msr_enabled(struct kvm *kvm)
41 return static_branch_unlikely(&kvm_xen_enabled.key) &&
42 kvm->arch.xen_hvm_config.msr;
45 static inline bool kvm_xen_hypercall_enabled(struct kvm *kvm)
47 return static_branch_unlikely(&kvm_xen_enabled.key) &&
48 (kvm->arch.xen_hvm_config.flags &
49 KVM_XEN_HVM_CONFIG_INTERCEPT_HCALL);
52 static inline int kvm_xen_has_interrupt(struct kvm_vcpu *vcpu)
54 if (static_branch_unlikely(&kvm_xen_enabled.key) &&
55 vcpu->arch.xen.vcpu_info_cache.active &&
56 vcpu->kvm->arch.xen.upcall_vector)
57 return __kvm_xen_has_interrupt(vcpu);
62 static inline bool kvm_xen_has_pending_events(struct kvm_vcpu *vcpu)
64 return static_branch_unlikely(&kvm_xen_enabled.key) &&
65 vcpu->arch.xen.evtchn_pending_sel;
68 static inline bool kvm_xen_timer_enabled(struct kvm_vcpu *vcpu)
70 return !!vcpu->arch.xen.timer_virq;
73 static inline int kvm_xen_has_pending_timer(struct kvm_vcpu *vcpu)
75 if (kvm_xen_hypercall_enabled(vcpu->kvm) && kvm_xen_timer_enabled(vcpu))
76 return atomic_read(&vcpu->arch.xen.timer_pending);
81 void kvm_xen_inject_timer_irqs(struct kvm_vcpu *vcpu);
83 static inline int kvm_xen_write_hypercall_page(struct kvm_vcpu *vcpu, u64 data)
88 static inline void kvm_xen_init_vm(struct kvm *kvm)
92 static inline void kvm_xen_destroy_vm(struct kvm *kvm)
96 static inline void kvm_xen_init_vcpu(struct kvm_vcpu *vcpu)
100 static inline void kvm_xen_destroy_vcpu(struct kvm_vcpu *vcpu)
104 static inline bool kvm_xen_msr_enabled(struct kvm *kvm)
109 static inline bool kvm_xen_hypercall_enabled(struct kvm *kvm)
114 static inline int kvm_xen_has_interrupt(struct kvm_vcpu *vcpu)
119 static inline void kvm_xen_inject_pending_events(struct kvm_vcpu *vcpu)
123 static inline bool kvm_xen_has_pending_events(struct kvm_vcpu *vcpu)
128 static inline int kvm_xen_has_pending_timer(struct kvm_vcpu *vcpu)
133 static inline void kvm_xen_inject_timer_irqs(struct kvm_vcpu *vcpu)
137 static inline bool kvm_xen_timer_enabled(struct kvm_vcpu *vcpu)
142 static inline void kvm_xen_update_tsc_info(struct kvm_vcpu *vcpu)
147 int kvm_xen_hypercall(struct kvm_vcpu *vcpu);
149 #include <asm/pvclock-abi.h>
150 #include <asm/xen/interface.h>
151 #include <xen/interface/vcpu.h>
153 void kvm_xen_update_runstate(struct kvm_vcpu *vcpu, int state);
155 static inline void kvm_xen_runstate_set_running(struct kvm_vcpu *vcpu)
157 kvm_xen_update_runstate(vcpu, RUNSTATE_running);
160 static inline void kvm_xen_runstate_set_preempted(struct kvm_vcpu *vcpu)
163 * If the vCPU wasn't preempted but took a normal exit for
164 * some reason (hypercalls, I/O, etc.), that is accounted as
165 * still RUNSTATE_running, as the VMM is still operating on
166 * behalf of the vCPU. Only if the VMM does actually block
167 * does it need to enter RUNSTATE_blocked.
169 if (WARN_ON_ONCE(!vcpu->preempted))
172 kvm_xen_update_runstate(vcpu, RUNSTATE_runnable);
175 /* 32-bit compatibility definitions, also used natively in 32-bit build */
176 struct compat_arch_vcpu_info {
181 struct compat_vcpu_info {
182 uint8_t evtchn_upcall_pending;
183 uint8_t evtchn_upcall_mask;
185 uint32_t evtchn_pending_sel;
186 struct compat_arch_vcpu_info arch;
187 struct pvclock_vcpu_time_info time;
188 }; /* 64 bytes (x86) */
190 struct compat_arch_shared_info {
191 unsigned int max_pfn;
192 unsigned int pfn_to_mfn_frame_list_list;
193 unsigned int nmi_reason;
194 unsigned int p2m_cr3;
195 unsigned int p2m_vaddr;
196 unsigned int p2m_generation;
200 struct compat_shared_info {
201 struct compat_vcpu_info vcpu_info[MAX_VIRT_CPUS];
202 uint32_t evtchn_pending[32];
203 uint32_t evtchn_mask[32];
204 struct pvclock_wall_clock wc;
205 struct compat_arch_shared_info arch;
208 #define COMPAT_EVTCHN_2L_NR_CHANNELS (8 * \
209 sizeof_field(struct compat_shared_info, \
211 struct compat_vcpu_runstate_info {
213 uint64_t state_entry_time;
215 } __attribute__((packed));
217 struct compat_sched_poll {
218 /* This is actually a guest virtual address which points to ports. */
220 unsigned int nr_ports;
224 #endif /* __ARCH_X86_KVM_XEN_H__ */