svm_onhyperv.h

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * KVM L1 hypervisor optimizations on Hyper-V for SVM.
 4 */
 5
 6#ifndef __ARCH_X86_KVM_SVM_ONHYPERV_H__
 7#define __ARCH_X86_KVM_SVM_ONHYPERV_H__
 8
 9#include <asm/mshyperv.h>
10
11#if IS_ENABLED(CONFIG_HYPERV)
12
13#include "kvm_onhyperv.h"
14#include "svm/hyperv.h"
15
16__init void svm_hv_hardware_setup(void);
17
18static inline bool svm_hv_is_enlightened_tlb_enabled(struct kvm_vcpu *vcpu)
19{
20	struct hv_vmcb_enlightenments *hve = &to_svm(vcpu)->vmcb->control.hv_enlightenments;
21
22	return ms_hyperv.nested_features & HV_X64_NESTED_ENLIGHTENED_TLB &&
23	       !!hve->hv_enlightenments_control.enlightened_npt_tlb;
24}
25
26static inline void svm_hv_init_vmcb(struct vmcb *vmcb)
27{
28	struct hv_vmcb_enlightenments *hve = &vmcb->control.hv_enlightenments;
29
30	BUILD_BUG_ON(sizeof(vmcb->control.hv_enlightenments) !=
31		     sizeof(vmcb->control.reserved_sw));
32
33	if (npt_enabled &&
34	    ms_hyperv.nested_features & HV_X64_NESTED_ENLIGHTENED_TLB)
35		hve->hv_enlightenments_control.enlightened_npt_tlb = 1;
36
37	if (ms_hyperv.nested_features & HV_X64_NESTED_MSR_BITMAP)
38		hve->hv_enlightenments_control.msr_bitmap = 1;
39}
40
41static inline void svm_hv_vmcb_dirty_nested_enlightenments(
42		struct kvm_vcpu *vcpu)
43{
44	struct vmcb *vmcb = to_svm(vcpu)->vmcb;
45	struct hv_vmcb_enlightenments *hve = &vmcb->control.hv_enlightenments;
46
47	if (hve->hv_enlightenments_control.msr_bitmap)
48		vmcb_mark_dirty(vmcb, HV_VMCB_NESTED_ENLIGHTENMENTS);
49}
50
51static inline void svm_hv_update_vp_id(struct vmcb *vmcb, struct kvm_vcpu *vcpu)
52{
53	struct hv_vmcb_enlightenments *hve = &vmcb->control.hv_enlightenments;
54	u32 vp_index = kvm_hv_get_vpindex(vcpu);
55
56	if (hve->hv_vp_id != vp_index) {
57		hve->hv_vp_id = vp_index;
58		vmcb_mark_dirty(vmcb, HV_VMCB_NESTED_ENLIGHTENMENTS);
59	}
60}
61#else
62
63static inline bool svm_hv_is_enlightened_tlb_enabled(struct kvm_vcpu *vcpu)
64{
65	return false;
66}
67
68static inline void svm_hv_init_vmcb(struct vmcb *vmcb)
69{
70}
71
72static inline __init void svm_hv_hardware_setup(void)
73{
74}
75
76static inline void svm_hv_vmcb_dirty_nested_enlightenments(
77		struct kvm_vcpu *vcpu)
78{
79}
80
81static inline void svm_hv_update_vp_id(struct vmcb *vmcb,
82		struct kvm_vcpu *vcpu)
83{
84}
85#endif /* CONFIG_HYPERV */
86
87#endif /* __ARCH_X86_KVM_SVM_ONHYPERV_H__ */