linux-kernel - Re: [PATCH v6 05/13] KVM: s390: use pending_irqs_no

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Date:   Mon, 28 Jan 2019 16:54:54 +0100
From:   Halil Pasic <pasic@...ux.ibm.com>
To:     Michael Mueller <mimu@...ux.ibm.com>
Cc:     KVM Mailing List <kvm@...r.kernel.org>,
        Linux-S390 Mailing List <linux-s390@...r.kernel.org>,
        linux-kernel@...r.kernel.org,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
        David Hildenbrand <david@...hat.com>,
        Cornelia Huck <cohuck@...hat.com>,
        Pierre Morel <pmorel@...ux.ibm.com>
Subject: Re: [PATCH v6 05/13] KVM: s390: use pending_irqs_no_gisa() where
 appropriate

On Thu, 24 Jan 2019 13:59:31 +0100
Michael Mueller <mimu@...ux.ibm.com> wrote:

> Interruption types that are not represented in GISA shall
> use pending_irqs_no_gisa() to test pending interruptions.
> 
> Signed-off-by: Michael Mueller <mimu@...ux.ibm.com>
> Reviewed-by: Cornelia Huck <cohuck@...hat.com>
> Reviewed-by: Pierre Morel <pmorel@...ux.ibm.com>

I guess this is just a tiny optimization.

Reviewed-by: Halil Pasic <pasic@...ux.ibm.com>

> ---
>  arch/s390/kvm/interrupt.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
> index 005dbe7252e7..cb48736867ed 100644
> --- a/arch/s390/kvm/interrupt.c
> +++ b/arch/s390/kvm/interrupt.c
> @@ -353,7 +353,7 @@ static void set_intercept_indicators_io(struct kvm_vcpu *vcpu)
>  
>  static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
>  {
> -	if (!(pending_irqs(vcpu) & IRQ_PEND_EXT_MASK))
> +	if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_EXT_MASK))
>  		return;
>  	if (psw_extint_disabled(vcpu))
>  		kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
> @@ -363,7 +363,7 @@ static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
>  
>  static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu)
>  {
> -	if (!(pending_irqs(vcpu) & IRQ_PEND_MCHK_MASK))
> +	if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_MCHK_MASK))
>  		return;
>  	if (psw_mchk_disabled(vcpu))
>  		vcpu->arch.sie_block->ictl |= ICTL_LPSW;