Il 20/08/2014 22:53, Radim Krčmář ha scritto:
> 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@xxxxxxxxxx>
> ---
> arch/arm/kvm/arm.c | 4 ++++
> arch/mips/kvm/mips.c | 4 ++++
> arch/powerpc/kvm/powerpc.c | 4 ++++
> arch/s390/kvm/kvm-s390.c | 4 ++++
> arch/x86/kvm/x86.c | 4 ++++
What about adding them as static inlines in
arch/*/include/asm/kvm_host.h (except for arch/x86 of course)?
Paolo
> include/linux/kvm_host.h | 2 ++
> virt/kvm/kvm_main.c | 2 ++
> 7 files changed, 24 insertions(+)
>
> diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
> index a99e0cd..9f788eb 100644
> --- a/arch/arm/kvm/arm.c
> +++ b/arch/arm/kvm/arm.c
> @@ -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;
> diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c
> index cd71141..2362df2 100644
> --- a/arch/mips/kvm/mips.c
> +++ b/arch/mips/kvm/mips.c
> @@ -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)
> {
> diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
> index 4c79284..cbc432f 100644
> --- a/arch/powerpc/kvm/powerpc.c
> +++ b/arch/powerpc/kvm/powerpc.c
> @@ -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
> diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
> index ce81eb2..a3c324e 100644
> --- a/arch/s390/kvm/kvm-s390.c
> +++ b/arch/s390/kvm/kvm-s390.c
> @@ -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);
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index 8f1e22d..d7c214f 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -7146,6 +7146,10 @@ 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)
> diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
> index a4c33b3..ebd7236 100644
> --- a/include/linux/kvm_host.h
> +++ b/include/linux/kvm_host.h
> @@ -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);
> diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
> index 33712fb..d3c3ed0 100644
> --- a/virt/kvm/kvm_main.c
> +++ b/virt/kvm/kvm_main.c
> @@ -3123,6 +3123,8 @@ 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);
> }
>
>
Reviewed-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
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