xref: /openbmc/linux/arch/x86/kvm/xen.h (revision b5f184fbdb03b4fcc1141de34dd5ec964ca5d99e)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright © 2019 Oracle and/or its affiliates. All rights reserved.
4  * Copyright © 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
5  *
6  * KVM Xen emulation
7  */
8 
9 #ifndef __ARCH_X86_KVM_XEN_H__
10 #define __ARCH_X86_KVM_XEN_H__
11 
12 #include <linux/jump_label_ratelimit.h>
13 
14 extern struct static_key_false_deferred kvm_xen_enabled;
15 
16 int __kvm_xen_has_interrupt(struct kvm_vcpu *vcpu);
17 int kvm_xen_vcpu_set_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data);
18 int kvm_xen_vcpu_get_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data);
19 int kvm_xen_hvm_set_attr(struct kvm *kvm, struct kvm_xen_hvm_attr *data);
20 int kvm_xen_hvm_get_attr(struct kvm *kvm, struct kvm_xen_hvm_attr *data);
21 int kvm_xen_hypercall(struct kvm_vcpu *vcpu);
22 int kvm_xen_write_hypercall_page(struct kvm_vcpu *vcpu, u64 data);
23 int kvm_xen_hvm_config(struct kvm *kvm, struct kvm_xen_hvm_config *xhc);
24 void kvm_xen_destroy_vm(struct kvm *kvm);
25 
26 static inline bool kvm_xen_hypercall_enabled(struct kvm *kvm)
27 {
28 	return static_branch_unlikely(&kvm_xen_enabled.key) &&
29 		(kvm->arch.xen_hvm_config.flags &
30 		 KVM_XEN_HVM_CONFIG_INTERCEPT_HCALL);
31 }
32 
33 static inline int kvm_xen_has_interrupt(struct kvm_vcpu *vcpu)
34 {
35 	if (static_branch_unlikely(&kvm_xen_enabled.key) &&
36 	    vcpu->arch.xen.vcpu_info_set && vcpu->kvm->arch.xen.upcall_vector)
37 		return __kvm_xen_has_interrupt(vcpu);
38 
39 	return 0;
40 }
41 
42 /* 32-bit compatibility definitions, also used natively in 32-bit build */
43 #include <asm/pvclock-abi.h>
44 #include <asm/xen/interface.h>
45 
46 struct compat_arch_vcpu_info {
47 	unsigned int cr2;
48 	unsigned int pad[5];
49 };
50 
51 struct compat_vcpu_info {
52 	uint8_t evtchn_upcall_pending;
53 	uint8_t evtchn_upcall_mask;
54 	uint16_t pad;
55 	uint32_t evtchn_pending_sel;
56 	struct compat_arch_vcpu_info arch;
57 	struct pvclock_vcpu_time_info time;
58 }; /* 64 bytes (x86) */
59 
60 struct compat_arch_shared_info {
61 	unsigned int max_pfn;
62 	unsigned int pfn_to_mfn_frame_list_list;
63 	unsigned int nmi_reason;
64 	unsigned int p2m_cr3;
65 	unsigned int p2m_vaddr;
66 	unsigned int p2m_generation;
67 	uint32_t wc_sec_hi;
68 };
69 
70 struct compat_shared_info {
71 	struct compat_vcpu_info vcpu_info[MAX_VIRT_CPUS];
72 	uint32_t evtchn_pending[32];
73 	uint32_t evtchn_mask[32];
74 	struct pvclock_wall_clock wc;
75 	struct compat_arch_shared_info arch;
76 };
77 
78 #endif /* __ARCH_X86_KVM_XEN_H__ */
79