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44bfe1f049
Make svm_x86_ops globally visible in anticipation of modifying the struct in avic.c, and clean up the KVM-on-HyperV usage, as declaring _and using_ a local variable in a header that's only defined in one specific .c-file is all kinds of ugly. Opportunistically make svm_hv_enable_l2_tlb_flush() local to svm_onhyperv.c, as the only reason it was visible was due to the aforementioned shenanigans in svm_onhyperv.h. Alternatively, svm_x86_ops could be explicitly passed to svm_hv_hardware_setup() as a parameter. While that approach is slightly safer, e.g. avoids "hidden" updates, for better or worse, the Intel side of KVM has already chosen to expose vt_x86_ops (and vt_init_ops). Given that svm_x86_ops is only truly consumed by kvm_ops_update, the odds of a "hidden" update causing problems are extremely low. So, absent a strong reason to rework the VMX/TDX code, make svm_x86_ops visible, as having all updates use exactly "svm_x86_ops." is advantageous in its own right. No functional change intended. Link: https://lore.kernel.org/r/20250919215934.1590410-2-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com>
88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* KVM L1 hypervisor optimizations on Hyper-V for SVM.
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*/
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#ifndef __ARCH_X86_KVM_SVM_ONHYPERV_H__
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#define __ARCH_X86_KVM_SVM_ONHYPERV_H__
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#include <asm/mshyperv.h>
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#if IS_ENABLED(CONFIG_HYPERV)
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#include "kvm_onhyperv.h"
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#include "svm/hyperv.h"
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__init void svm_hv_hardware_setup(void);
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static inline bool svm_hv_is_enlightened_tlb_enabled(struct kvm_vcpu *vcpu)
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{
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struct hv_vmcb_enlightenments *hve = &to_svm(vcpu)->vmcb->control.hv_enlightenments;
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return ms_hyperv.nested_features & HV_X64_NESTED_ENLIGHTENED_TLB &&
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!!hve->hv_enlightenments_control.enlightened_npt_tlb;
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}
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static inline void svm_hv_init_vmcb(struct vmcb *vmcb)
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{
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struct hv_vmcb_enlightenments *hve = &vmcb->control.hv_enlightenments;
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BUILD_BUG_ON(sizeof(vmcb->control.hv_enlightenments) !=
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sizeof(vmcb->control.reserved_sw));
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if (npt_enabled &&
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ms_hyperv.nested_features & HV_X64_NESTED_ENLIGHTENED_TLB)
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hve->hv_enlightenments_control.enlightened_npt_tlb = 1;
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if (ms_hyperv.nested_features & HV_X64_NESTED_MSR_BITMAP)
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hve->hv_enlightenments_control.msr_bitmap = 1;
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}
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static inline void svm_hv_vmcb_dirty_nested_enlightenments(
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struct kvm_vcpu *vcpu)
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{
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struct vmcb *vmcb = to_svm(vcpu)->vmcb;
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struct hv_vmcb_enlightenments *hve = &vmcb->control.hv_enlightenments;
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if (hve->hv_enlightenments_control.msr_bitmap)
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vmcb_mark_dirty(vmcb, HV_VMCB_NESTED_ENLIGHTENMENTS);
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}
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static inline void svm_hv_update_vp_id(struct vmcb *vmcb, struct kvm_vcpu *vcpu)
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{
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struct hv_vmcb_enlightenments *hve = &vmcb->control.hv_enlightenments;
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u32 vp_index = kvm_hv_get_vpindex(vcpu);
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if (hve->hv_vp_id != vp_index) {
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hve->hv_vp_id = vp_index;
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vmcb_mark_dirty(vmcb, HV_VMCB_NESTED_ENLIGHTENMENTS);
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}
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}
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#else
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static inline bool svm_hv_is_enlightened_tlb_enabled(struct kvm_vcpu *vcpu)
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{
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return false;
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}
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static inline void svm_hv_init_vmcb(struct vmcb *vmcb)
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{
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}
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static inline __init void svm_hv_hardware_setup(void)
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{
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}
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static inline void svm_hv_vmcb_dirty_nested_enlightenments(
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struct kvm_vcpu *vcpu)
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{
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}
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static inline void svm_hv_update_vp_id(struct vmcb *vmcb,
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struct kvm_vcpu *vcpu)
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{
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}
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#endif /* CONFIG_HYPERV */
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#endif /* __ARCH_X86_KVM_SVM_ONHYPERV_H__ */
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