From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Fedin Subject: RE: [PATCH v3 00/16] KVM: arm64: GICv3 ITS emulation Date: Wed, 07 Oct 2015 21:09:07 +0300 Message-ID: <02c301d1012b$42cb8270$c8628750$@samsung.com> References: <1444229726-31559-1-git-send-email-andre.przywara@arm.com> <029601d1011a$026e1000$074a3000$@samsung.com> <561546AF.90903@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: In-reply-to: <561546AF.90903@arm.com> Content-language: ru Sender: kvm-owner@vger.kernel.org To: 'Marc Zyngier' , 'Andre Przywara' , christoffer.dall@linaro.org Cc: eric.auger@linaro.org, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org List-Id: kvmarm@lists.cs.columbia.edu Hello! > LPIs do not have an active state, at the redistributor or otherwise. Then what do they become after they were ACK'ed and before EOI'ed? I tried to google up this thing, and came up with this email: http://www.spinics.net/lists/kvm-arm/msg16032.html. It says that "SW must issue a write to EOI to clear the active priorities register, hence the CPU interface still requires an active state for LPIs". They give a link to some document which seems to be top-secret and never published, because my arch reference manual does not have section 4.8.3 named "Properties of LPI". And another thread, http://lists.xen.org/archives/html/xen-devel/2014-09/msg01141.html, says that virtual LPIs actually do have active state in LR. Kind regards, Pavel Fedin Expert Engineer Samsung Electronics Research center Russia From mboxrd@z Thu Jan 1 00:00:00 1970 From: p.fedin@samsung.com (Pavel Fedin) Date: Wed, 07 Oct 2015 21:09:07 +0300 Subject: [PATCH v3 00/16] KVM: arm64: GICv3 ITS emulation In-Reply-To: <561546AF.90903@arm.com> References: <1444229726-31559-1-git-send-email-andre.przywara@arm.com> <029601d1011a$026e1000$074a3000$@samsung.com> <561546AF.90903@arm.com> Message-ID: <02c301d1012b$42cb8270$c8628750$@samsung.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hello! > LPIs do not have an active state, at the redistributor or otherwise. Then what do they become after they were ACK'ed and before EOI'ed? I tried to google up this thing, and came up with this email: http://www.spinics.net/lists/kvm-arm/msg16032.html. It says that "SW must issue a write to EOI to clear the active priorities register, hence the CPU interface still requires an active state for LPIs". They give a link to some document which seems to be top-secret and never published, because my arch reference manual does not have section 4.8.3 named "Properties of LPI". And another thread, http://lists.xen.org/archives/html/xen-devel/2014-09/msg01141.html, says that virtual LPIs actually do have active state in LR. Kind regards, Pavel Fedin Expert Engineer Samsung Electronics Research center Russia