cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

svm_onhyperv.h (2540B)

      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#if IS_ENABLED(CONFIG_HYPERV)
     10
     11#include "kvm_onhyperv.h"
     12#include "svm/hyperv.h"
     13
     14static struct kvm_x86_ops svm_x86_ops;
     15
     16int svm_hv_enable_direct_tlbflush(struct kvm_vcpu *vcpu);
     17
     18static inline void svm_hv_init_vmcb(struct vmcb *vmcb)
     19{
     20	struct hv_enlightenments *hve =
     21		(struct hv_enlightenments *)vmcb->control.reserved_sw;
     22
     23	if (npt_enabled &&
     24	    ms_hyperv.nested_features & HV_X64_NESTED_ENLIGHTENED_TLB)
     25		hve->hv_enlightenments_control.enlightened_npt_tlb = 1;
     26
     27	if (ms_hyperv.nested_features & HV_X64_NESTED_MSR_BITMAP)
     28		hve->hv_enlightenments_control.msr_bitmap = 1;
     29}
     30
     31static inline void svm_hv_hardware_setup(void)
     32{
     33	if (npt_enabled &&
     34	    ms_hyperv.nested_features & HV_X64_NESTED_ENLIGHTENED_TLB) {
     35		pr_info("kvm: Hyper-V enlightened NPT TLB flush enabled\n");
     36		svm_x86_ops.tlb_remote_flush = hv_remote_flush_tlb;
     37		svm_x86_ops.tlb_remote_flush_with_range =
     38				hv_remote_flush_tlb_with_range;
     39	}
     40
     41	if (ms_hyperv.nested_features & HV_X64_NESTED_DIRECT_FLUSH) {
     42		int cpu;
     43
     44		pr_info("kvm: Hyper-V Direct TLB Flush enabled\n");
     45		for_each_online_cpu(cpu) {
     46			struct hv_vp_assist_page *vp_ap =
     47				hv_get_vp_assist_page(cpu);
     48
     49			if (!vp_ap)
     50				continue;
     51
     52			vp_ap->nested_control.features.directhypercall = 1;
     53		}
     54		svm_x86_ops.enable_direct_tlbflush =
     55				svm_hv_enable_direct_tlbflush;
     56	}
     57}
     58
     59static inline void svm_hv_vmcb_dirty_nested_enlightenments(
     60		struct kvm_vcpu *vcpu)
     61{
     62	struct vmcb *vmcb = to_svm(vcpu)->vmcb;
     63	struct hv_enlightenments *hve =
     64		(struct hv_enlightenments *)vmcb->control.reserved_sw;
     65
     66	if (hve->hv_enlightenments_control.msr_bitmap)
     67		vmcb_mark_dirty(vmcb, VMCB_HV_NESTED_ENLIGHTENMENTS);
     68}
     69
     70static inline void svm_hv_update_vp_id(struct vmcb *vmcb,
     71		struct kvm_vcpu *vcpu)
     72{
     73	struct hv_enlightenments *hve =
     74		(struct hv_enlightenments *)vmcb->control.reserved_sw;
     75	u32 vp_index = kvm_hv_get_vpindex(vcpu);
     76
     77	if (hve->hv_vp_id != vp_index) {
     78		hve->hv_vp_id = vp_index;
     79		vmcb_mark_dirty(vmcb, VMCB_HV_NESTED_ENLIGHTENMENTS);
     80	}
     81}
     82#else
     83
     84static inline void svm_hv_init_vmcb(struct vmcb *vmcb)
     85{
     86}
     87
     88static inline void svm_hv_hardware_setup(void)
     89{
     90}
     91
     92static inline void svm_hv_vmcb_dirty_nested_enlightenments(
     93		struct kvm_vcpu *vcpu)
     94{
     95}
     96
     97static inline void svm_hv_update_vp_id(struct vmcb *vmcb,
     98		struct kvm_vcpu *vcpu)
     99{
    100}
    101#endif /* CONFIG_HYPERV */
    102
    103#endif /* __ARCH_X86_KVM_SVM_ONHYPERV_H__ */