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[209.132.180.67]) by mx.google.com with ESMTP id h85si19554246pfd.27.2018.12.20.11.31.40; Thu, 20 Dec 2018 11:32:01 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730793AbeLTLGW (ORCPT + 99 others); Thu, 20 Dec 2018 06:06:22 -0500 Received: from mx1.redhat.com ([209.132.183.28]:34893 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730001AbeLTLGW (ORCPT ); Thu, 20 Dec 2018 06:06:22 -0500 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 424D3A090A; Thu, 20 Dec 2018 11:06:21 +0000 (UTC) Received: from gondolin (dhcp-192-187.str.redhat.com [10.33.192.187]) by smtp.corp.redhat.com (Postfix) with ESMTP id 35138600C0; Thu, 20 Dec 2018 11:06:17 +0000 (UTC) Date: Thu, 20 Dec 2018 12:06:14 +0100 From: Cornelia Huck To: Michael Mueller Cc: KVM Mailing List , Linux-S390 Mailing List , linux-kernel@vger.kernel.org, Martin Schwidefsky , Heiko Carstens , Christian Borntraeger , Janosch Frank , David Hildenbrand , Halil Pasic , Pierre Morel Subject: Re: [PATCH v5 05/15] KVM: s390: unify pending_irqs() and pending_irqs_no_gisa() Message-ID: <20181220120614.65acacac.cohuck@redhat.com> In-Reply-To: <20181219191756.57973-6-mimu@linux.ibm.com> References: <20181219191756.57973-1-mimu@linux.ibm.com> <20181219191756.57973-6-mimu@linux.ibm.com> Organization: Red Hat GmbH MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Thu, 20 Dec 2018 11:06:21 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 19 Dec 2018 20:17:46 +0100 Michael Mueller wrote: > Use a single function with parameter irq_flags to differentiate > between cases. > > New irq flag: > IRQ_FLAG_LOCAL: include vcpu local interruptions pending > IRQ_FLAG_FLOATING: include vcpu floating interruptions pending > IRQ_FLAG_GISA: include GISA interruptions pending in IPM I presume that means that irqs may be in more than one set? Or are gisa irqs not considered floating irqs, because they use a different mechanism? > > New irq masks: > IRQ_MASK_ALL: include all types > IRQ_MASK_NO_GISA: include all types but GISA > > Examples: > pending_irqs(vcpu, IRQ_MASK_ALL) > pending_irqs(vcpu, IRQ_MASK_NO_GISA) > > There will be more irq flags with upcoming patches. > > Signed-off-by: Michael Mueller > --- > arch/s390/kvm/interrupt.c | 33 +++++++++++++++++++++------------ > 1 file changed, 21 insertions(+), 12 deletions(-) > > diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c > index 093b568b6356..4ab20d2eb180 100644 > --- a/arch/s390/kvm/interrupt.c > +++ b/arch/s390/kvm/interrupt.c > @@ -31,6 +31,13 @@ > #define PFAULT_DONE 0x0680 > #define VIRTIO_PARAM 0x0d00 > > +#define IRQ_FLAG_LOCAL 0x8000 /* include local interruption pending mask */ > +#define IRQ_FLAG_FLOATING 0x4000 /* include float interruption pending mask */ > +#define IRQ_FLAG_GISA 0x2000 /* include GISA interruption pending mask */ > + > +#define IRQ_MASK_ALL (IRQ_FLAG_LOCAL | IRQ_FLAG_FLOATING | IRQ_FLAG_GISA) > +#define IRQ_MASK_NO_GISA (IRQ_MASK_ALL & ~IRQ_FLAG_GISA) > + > /* handle external calls via sigp interpretation facility */ > static int sca_ext_call_pending(struct kvm_vcpu *vcpu, int *src_id) > { > @@ -237,16 +244,18 @@ static inline int kvm_s390_gisa_tac_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gis > return test_and_clear_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa); > } > > -static inline unsigned long pending_irqs_no_gisa(struct kvm_vcpu *vcpu) > +static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu, u16 irq_flags) Any deeper reason why this is a u16? 16 bits should be enough for everyone? :) > { > - return vcpu->kvm->arch.float_int.pending_irqs | > - vcpu->arch.local_int.pending_irqs; > -} > + unsigned long pending_irqs = 0; > > -static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu) > -{ > - return pending_irqs_no_gisa(vcpu) | > - kvm_s390_gisa_get_ipm(vcpu->kvm->arch.gisa) << IRQ_PEND_IO_ISC_7; > + if (irq_flags & IRQ_FLAG_LOCAL) > + pending_irqs |= vcpu->arch.local_int.pending_irqs; > + if (irq_flags & IRQ_FLAG_FLOATING) > + pending_irqs |= vcpu->kvm->arch.float_int.pending_irqs; > + if (irq_flags & IRQ_FLAG_GISA) > + pending_irqs |= kvm_s390_gisa_get_ipm(vcpu->kvm->arch.gisa) << > + IRQ_PEND_IO_ISC_7; > + return pending_irqs; > } > > static inline int isc_to_irq_type(unsigned long isc) > @@ -275,7 +284,7 @@ static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu) > { > unsigned long active_mask; > > - active_mask = pending_irqs(vcpu); > + active_mask = pending_irqs(vcpu, IRQ_MASK_ALL); > if (!active_mask) > return 0; > > @@ -343,7 +352,7 @@ static void __reset_intercept_indicators(struct kvm_vcpu *vcpu) > > static void set_intercept_indicators_io(struct kvm_vcpu *vcpu) > { > - if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_IO_MASK)) > + if (!(pending_irqs(vcpu, IRQ_MASK_NO_GISA) & IRQ_PEND_IO_MASK)) I/O interrupts are always floating, so you probably could check for only floating (excluding gisa) irqs here. > return; > else if (psw_ioint_disabled(vcpu)) > kvm_s390_set_cpuflags(vcpu, CPUSTAT_IO_INT);Store Data > @@ -353,7 +362,7 @@ static void set_intercept_indicators_io(struct kvm_vcpu *vcpu) > > static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu) > { > - if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_EXT_MASK)) > + if (!(pending_irqs(vcpu, IRQ_MASK_NO_GISA) & IRQ_PEND_EXT_MASK)) > return; > if (psw_extint_disabled(vcpu)) > kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT); > @@ -363,7 +372,7 @@ static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu) > > static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu) > { > - if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_MCHK_MASK)) > + if (!(pending_irqs(vcpu, IRQ_MASK_NO_GISA) & IRQ_PEND_MCHK_MASK)) > return; > if (psw_mchk_disabled(vcpu)) > vcpu->arch.sie_block->ictl |= ICTL_LPSW;