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From: Sascha Bischoff <Sascha.Bischoff@arm.com>
To: "lpieralisi@kernel.org" <lpieralisi@kernel.org>
Cc: "yuzenghui@huawei.com" <yuzenghui@huawei.com>,
	"tglx@linutronix.de" <tglx@linutronix.de>,
	Timothy Hayes <Timothy.Hayes@arm.com>, nd <nd@arm.com>,
	"oliver.upton@linux.dev" <oliver.upton@linux.dev>,
	"kvmarm@lists.linux.dev" <kvmarm@lists.linux.dev>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>,
	"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
	Joey Gouly <Joey.Gouly@arm.com>,
	"maz@kernel.org" <maz@kernel.org>,
	Suzuki Poulose <Suzuki.Poulose@arm.com>,
	"will@kernel.org" <will@kernel.org>
Subject: Re: [PATCH 1/5] irqchip/gic-v5: Skip deactivate for forwarded PPI interrupts
Date: Fri, 27 Jun 2025 09:49:31 +0000	[thread overview]
Message-ID: <99c4946f2857e165d74d498476be75db21ff4cee.camel@arm.com> (raw)
In-Reply-To: <aFlw4lOj8tUGrSTb@lpieralisi>

On Mon, 2025-06-23 at 17:21 +0200, Lorenzo Pieralisi wrote:
> On Fri, Jun 20, 2025 at 04:07:50PM +0000, Sascha Bischoff wrote:
> > If a PPI interrupt is forwarded to a guest, skip the deactivate and
> > only EOI. Rely on the guest deactivating the both the virtual and
> 
> "deactivating both"

Done.

> 
> > physical interrupts (due to ICH_LRx_EL2.HW being set) later on as
> > part
> > of handling the injected interrupt. This mimics the behaviour seen
> > on
> > native GICv3.
> > 
> > This is part of adding support for the GICv3 compatibility mode on
> > a
> > GICv5 host.
> > 
> > Co-authored-by: Timothy Hayes <timothy.hayes@arm.com>
> > Signed-off-by: Timothy Hayes <timothy.hayes@arm.com>
> > Signed-off-by: Sascha Bischoff <sascha.bischoff@arm.com>
> > ---
> >  drivers/irqchip/irq-gic-v5.c | 17 +++++++++++++++++
> >  1 file changed, 17 insertions(+)
> 
> Reviewed-by: Lorenzo Pieralisi <lpieralisi@kernel.org>

Done. Thanks!
Sascha



  reply	other threads:[~2025-06-27  9:50 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-06-20 16:07 [PATCH 0/5] KVM: arm64: Enable GICv3 guests on GICv5 hosts using FEAT_GCIE_LEGACY Sascha Bischoff
2025-06-20 16:07 ` [PATCH 1/5] irqchip/gic-v5: Skip deactivate for forwarded PPI interrupts Sascha Bischoff
2025-06-23 15:21   ` Lorenzo Pieralisi
2025-06-27  9:49     ` Sascha Bischoff [this message]
2025-06-20 16:07 ` [PATCH 2/5] irqchip/gic-v5: Populate struct gic_kvm_info Sascha Bischoff
2025-06-23 15:14   ` Lorenzo Pieralisi
2025-06-27  9:49     ` Sascha Bischoff
2025-06-20 16:07 ` [PATCH 4/5] KVM: arm64: gic-v5: Support GICv3 compat Sascha Bischoff
2025-06-20 20:20   ` Oliver Upton
2025-06-20 23:02     ` Oliver Upton
2025-06-23 13:11       ` Sascha Bischoff
2025-06-22 12:19     ` Marc Zyngier
2025-06-22 12:37       ` Oliver Upton
2025-06-23 13:02         ` Sascha Bischoff
2025-06-20 16:07 ` [PATCH 3/5] arm64/sysreg: Add ICH_VCTLR_EL2 Sascha Bischoff
2025-06-20 16:07 ` [PATCH 5/5] KVM: arm64: gic-v5: Probe for GICv5 Sascha Bischoff
2025-06-20 20:25   ` Oliver Upton
2025-06-23 13:12     ` Sascha Bischoff

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