1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * KVM L1 hypervisor optimizations on Hyper-V for SVM.
4 */
5 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
6
7 #include <linux/kvm_host.h>
8
9 #include <asm/mshyperv.h>
10
11 #include "svm.h"
12 #include "svm_ops.h"
13
14 #include "hyperv.h"
15 #include "kvm_onhyperv.h"
16 #include "svm_onhyperv.h"
17
18 int svm_hv_enable_l2_tlb_flush(struct kvm_vcpu *vcpu)
19 {
20 struct hv_vmcb_enlightenments *hve;
21 hpa_t partition_assist_page = hv_get_partition_assist_page(vcpu);
22
23 if (partition_assist_page == INVALID_PAGE)
24 return -ENOMEM;
25
26 hve = &to_svm(vcpu)->vmcb->control.hv_enlightenments;
27
28 hve->partition_assist_page = partition_assist_page;
29 hve->hv_vm_id = (unsigned long)vcpu->kvm;
30 if (!hve->hv_enlightenments_control.nested_flush_hypercall) {
31 hve->hv_enlightenments_control.nested_flush_hypercall = 1;
32 vmcb_mark_dirty(to_svm(vcpu)->vmcb, HV_VMCB_NESTED_ENLIGHTENMENTS);
33 }
34
35 return 0;
36 }
37
38
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