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
18int 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

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * KVM L1 hypervisor optimizations on Hyper-V for SVM.
 4 */
 
 5
 6#include <linux/kvm_host.h>
 7#include "kvm_cache_regs.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
18int svm_hv_enable_direct_tlbflush(struct kvm_vcpu *vcpu)
19{
20	struct hv_enlightenments *hve;
21	struct hv_partition_assist_pg **p_hv_pa_pg =
22			&to_kvm_hv(vcpu->kvm)->hv_pa_pg;
23
24	if (!*p_hv_pa_pg)
25		*p_hv_pa_pg = kzalloc(PAGE_SIZE, GFP_KERNEL);
26
27	if (!*p_hv_pa_pg)
28		return -ENOMEM;
29
30	hve = (struct hv_enlightenments *)to_svm(vcpu)->vmcb->control.reserved_sw;
31
32	hve->partition_assist_page = __pa(*p_hv_pa_pg);
33	hve->hv_vm_id = (unsigned long)vcpu->kvm;
34	if (!hve->hv_enlightenments_control.nested_flush_hypercall) {
35		hve->hv_enlightenments_control.nested_flush_hypercall = 1;
36		vmcb_mark_dirty(to_svm(vcpu)->vmcb, VMCB_HV_NESTED_ENLIGHTENMENTS);
37	}
38
39	return 0;
40}
41