linux-kernel - Re: [PATCH v5 3/5] KVM: arm/arm64: implement kvm_arch_is_virtual_intc

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Message-ID: <20150111211250.GE3868@cbox>
Date:	Sun, 11 Jan 2015 22:12:50 +0100
From:	Christoffer Dall <christoffer.dall@...aro.org>
To:	Eric Auger <eric.auger@...aro.org>
Cc:	eric.auger@...com, marc.zyngier@....com,
	linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
	kvm@...r.kernel.org, alex.williamson@...hat.com, agraf@...e.de,
	joel.schopp@....com, gleb@...nel.org, pbonzini@...hat.com,
	borntraeger@...ibm.com, cornelia.huck@...ibm.com,
	linux-kernel@...r.kernel.org, patches@...aro.org,
	a.motakis@...tualopensystems.com
Subject: Re: [PATCH v5 3/5] KVM: arm/arm64: implement
 kvm_arch_is_virtual_intc_initialized

On Wed, Dec 03, 2014 at 05:07:10PM +0100, Eric Auger wrote:
> on arm/arm64 the VGIC is dynamically instantiated and it is useful
> to expose its state, especially for irqfd setup.
> 
> This patch defines __KVM_HAVE_ARCH_VIRTUAL_INTC_INITIALIZED
> and implements kvm_arch_is_virtual_intc_initialized
> 
> Signed-off-by: Eric Auger <eric.auger@...aro.org>
> ---
>  arch/arm/include/asm/kvm_host.h   | 6 ++++++
>  arch/arm/kvm/arm.c                | 5 +++++
>  arch/arm64/include/asm/kvm_host.h | 5 +++++
>  3 files changed, 16 insertions(+)
> 
> diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h
> index 53036e2..fe2c89b 100644
> --- a/arch/arm/include/asm/kvm_host.h
> +++ b/arch/arm/include/asm/kvm_host.h
> @@ -27,6 +27,8 @@
>  #include <asm/fpstate.h>
>  #include <kvm/arm_arch_timer.h>
>  
> +#define __KVM_HAVE_ARCH_VIRTUAL_INTC_INITIALIZED
> +
>  #if defined(CONFIG_KVM_ARM_MAX_VCPUS)
>  #define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
>  #else
> @@ -242,4 +244,8 @@ static inline void kvm_arch_sync_events(struct kvm *kvm) {}
>  static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
>  static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
>  
> +/* returns true if the vgic dynamic initialization is done*/
> +bool kvm_arch_is_virtual_intc_initialized(struct kvm *kvm);

I feel like this should go in include/linux/kvm_host.h where there's
already a description of the function API.

> +
> +
>  #endif /* __ARM_KVM_HOST_H__ */
> diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
> index 9e193c8..5309e4b 100644
> --- a/arch/arm/kvm/arm.c
> +++ b/arch/arm/kvm/arm.c
> @@ -439,6 +439,11 @@ static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu)
>  	return 0;
>  }
>  
> +bool kvm_arch_is_virtual_intc_initialized(struct kvm *kvm)
> +{
> +	return vgic_initialized(kvm);
> +}
> +
>  static void vcpu_pause(struct kvm_vcpu *vcpu)
>  {
>  	wait_queue_head_t *wq = kvm_arch_vcpu_wq(vcpu);
> diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
> index 2012c4b..5badd30 100644
> --- a/arch/arm64/include/asm/kvm_host.h
> +++ b/arch/arm64/include/asm/kvm_host.h
> @@ -28,6 +28,8 @@
>  #include <asm/kvm_asm.h>
>  #include <asm/kvm_mmio.h>
>  
> +#define __KVM_HAVE_ARCH_VIRTUAL_INTC_INITIALIZED
> +
>  #if defined(CONFIG_KVM_ARM_MAX_VCPUS)
>  #define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
>  #else
> @@ -254,4 +256,7 @@ static inline void kvm_arch_sync_events(struct kvm *kvm) {}
>  static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
>  static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
>  
> +/* returns true if the vgic dynamic initialization is done*/
> +bool kvm_arch_is_virtual_intc_initialized(struct kvm *kvm);
> +
>  #endif /* __ARM64_KVM_HOST_H__ */
> -- 
> 1.9.1
> 
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