| 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(vmcb: to_svm(vcpu)->vmcb, HV_VMCB_NESTED_ENLIGHTENMENTS); |
| 33 | } |
| 34 | |
| 35 | return 0; |
| 36 | } |
| 37 | |
| 38 |