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KVM: add kvm_arch_sched_in

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Introduce preempt notifiers for architecture specific code.
Advantage over creating a new notifier in every arch is slightly simpler
code and guaranteed call order with respect to kvm_sched_in.

Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Radim Krčmář 2014-08-21 18:08:05 +02:00 committed by Paolo Bonzini
parent 6689fbe3cf
commit e790d9ef64
7 changed files with 24 additions and 0 deletions
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4
arch/arm/kvm/arm.c
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@ -288,6 +288,10 @@ void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
{
}
void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu)
{
}
void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
vcpu->cpu = cpu;

4
arch/mips/kvm/mips.c
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@ -1002,6 +1002,10 @@ void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
{
}
void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu)
{
}
int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
struct kvm_translation *tr)
{

4
arch/powerpc/kvm/powerpc.c
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@ -720,6 +720,10 @@ void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
kvmppc_subarch_vcpu_uninit(vcpu);
}
void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu)
{
}
void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
#ifdef CONFIG_BOOKE

4
arch/s390/kvm/kvm-s390.c
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@ -555,6 +555,10 @@ void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
/* Nothing todo */
}
void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu)
{
}
void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
save_fp_ctl(&vcpu->arch.host_fpregs.fpc);

4
arch/x86/kvm/x86.c
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@ -7171,6 +7171,10 @@ void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
static_key_slow_dec(&kvm_no_apic_vcpu);
}
void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu)
{
}
int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
{
if (type)

2
include/linux/kvm_host.h
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@ -624,6 +624,8 @@ void kvm_arch_exit(void);
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu);
void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);

2
virt/kvm/kvm_main.c
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@ -3124,6 +3124,8 @@ static void kvm_sched_in(struct preempt_notifier *pn, int cpu)
if (vcpu->preempted)
vcpu->preempted = false;
kvm_arch_sched_in(vcpu, cpu);
kvm_arch_vcpu_load(vcpu, cpu);
}