linux-kernel - Re: [PATCH v7 02/17] KVM: Add some helper functions for Posted-Interrupts

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Date:	Fri, 11 Sep 2015 12:16:44 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Feng Wu <feng.wu@...el.com>, alex.williamson@...hat.com,
	joro@...tes.org, mtosatti@...hat.com
Cc:	eric.auger@...aro.org, kvm@...r.kernel.org,
	iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 02/17] KVM: Add some helper functions for
 Posted-Interrupts



On 25/08/2015 10:50, Feng Wu wrote:
> This patch adds some helper functions to manipulate the
> Posted-Interrupts Descriptor.
> 
> Signed-off-by: Feng Wu <feng.wu@...el.com>
> ---
>  arch/x86/kvm/vmx.c | 26 ++++++++++++++++++++++++++
>  1 file changed, 26 insertions(+)
> 
> diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
> index 271dd70..316f9bf 100644
> --- a/arch/x86/kvm/vmx.c
> +++ b/arch/x86/kvm/vmx.c
> @@ -443,6 +443,8 @@ struct nested_vmx {
>  };
>  
>  #define POSTED_INTR_ON  0
> +#define POSTED_INTR_SN  1
> +
>  /* Posted-Interrupt Descriptor */
>  struct pi_desc {
>  	u32 pir[8];     /* Posted interrupt requested */
> @@ -483,6 +485,30 @@ static int pi_test_and_set_pir(int vector, struct pi_desc *pi_desc)
>  	return test_and_set_bit(vector, (unsigned long *)pi_desc->pir);
>  }
>  
> +static void pi_clear_sn(struct pi_desc *pi_desc)
> +{
> +	return clear_bit(POSTED_INTR_SN,
> +			(unsigned long *)&pi_desc->control);
> +}
> +
> +static void pi_set_sn(struct pi_desc *pi_desc)
> +{
> +	return set_bit(POSTED_INTR_SN,
> +			(unsigned long *)&pi_desc->control);
> +}
> +
> +static int pi_test_on(struct pi_desc *pi_desc)
> +{
> +	return test_bit(POSTED_INTR_ON,
> +			(unsigned long *)&pi_desc->control);
> +}
> +
> +static int pi_test_sn(struct pi_desc *pi_desc)
> +{
> +	return test_bit(POSTED_INTR_SN,
> +			(unsigned long *)&pi_desc->control);
> +}
> +
>  struct vcpu_vmx {
>  	struct kvm_vcpu       vcpu;
>  	unsigned long         host_rsp;
> 

Reviewed-by: Paolo Bonzini <pbonzini@...hat.com>
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