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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2021-01-26 14:48:13 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-02-09 14:17:15 +0100 |
| commit | 4592b7eaa87d3525825d4ab2a35308bcec9e5ff9 (patch) | |
| tree | 744f648c1544ecb67be2056d135d3ced51d68ede /arch/x86/kvm/hyperv.h | |
| parent | KVM: x86: hyper-v: Prepare to meet unallocated Hyper-V context (diff) | |
| download | linux-4592b7eaa87d3525825d4ab2a35308bcec9e5ff9.tar.xz linux-4592b7eaa87d3525825d4ab2a35308bcec9e5ff9.zip | |
KVM: x86: hyper-v: Allocate 'struct kvm_vcpu_hv' dynamically
Hyper-V context is only needed for guests which use Hyper-V emulation in
KVM (e.g. Windows/Hyper-V guests). 'struct kvm_vcpu_hv' is, however, quite
big, it accounts for more than 1/4 of the total 'struct kvm_vcpu_arch'
which is also quite big already. This all looks like a waste.
Allocate 'struct kvm_vcpu_hv' dynamically. This patch does not bring any
(intentional) functional change as we still allocate the context
unconditionally but it paves the way to doing that only when needed.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20210126134816.1880136-13-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/hyperv.h')
| -rw-r--r-- | arch/x86/kvm/hyperv.h | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/arch/x86/kvm/hyperv.h b/arch/x86/kvm/hyperv.h index 57e53a88f5eb..4bc2ab0caa92 100644 --- a/arch/x86/kvm/hyperv.h +++ b/arch/x86/kvm/hyperv.h @@ -57,20 +57,19 @@ static inline struct kvm_hv *to_kvm_hv(struct kvm *kvm) static inline struct kvm_vcpu_hv *to_hv_vcpu(struct kvm_vcpu *vcpu) { - return &vcpu->arch.hyperv; + return vcpu->arch.hyperv; } static inline struct kvm_vcpu *hv_vcpu_to_vcpu(struct kvm_vcpu_hv *hv_vcpu) { - struct kvm_vcpu_arch *arch; - - arch = container_of(hv_vcpu, struct kvm_vcpu_arch, hyperv); - return container_of(arch, struct kvm_vcpu, arch); + return hv_vcpu->vcpu; } static inline struct kvm_vcpu_hv_synic *to_hv_synic(struct kvm_vcpu *vcpu) { - return &vcpu->arch.hyperv.synic; + struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu); + + return &hv_vcpu->synic; } static inline struct kvm_vcpu *hv_synic_to_vcpu(struct kvm_vcpu_hv_synic *synic) @@ -101,7 +100,7 @@ int kvm_hv_synic_set_irq(struct kvm *kvm, u32 vcpu_id, u32 sint); void kvm_hv_synic_send_eoi(struct kvm_vcpu *vcpu, int vector); int kvm_hv_activate_synic(struct kvm_vcpu *vcpu, bool dont_zero_synic_pages); -void kvm_hv_vcpu_init(struct kvm_vcpu *vcpu); +int kvm_hv_vcpu_init(struct kvm_vcpu *vcpu); void kvm_hv_vcpu_postcreate(struct kvm_vcpu *vcpu); void kvm_hv_vcpu_uninit(struct kvm_vcpu *vcpu); |