lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Wed, 27 Feb 2019 17:31:38 +0000 From: Michael Kelley <mikelley@...rosoft.com> To: "lantianyu1986@...il.com" <lantianyu1986@...il.com>, "joro@...tes.org" <joro@...tes.org>, "mchehab+samsung@...nel.org" <mchehab+samsung@...nel.org>, "davem@...emloft.net" <davem@...emloft.net>, "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>, "nicolas.ferre@...rochip.com" <nicolas.ferre@...rochip.com>, "arnd@...db.de" <arnd@...db.de>, KY Srinivasan <kys@...rosoft.com>, vkuznets <vkuznets@...hat.com>, "alex.williamson@...hat.com" <alex.williamson@...hat.com>, "sashal@...nel.org" <sashal@...nel.org>, "dan.carpenter@...cle.com" <dan.carpenter@...cle.com> CC: Tianyu Lan <Tianyu.Lan@...rosoft.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>, "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org> Subject: RE: [PATCH V6 2/3] IOMMU/Hyper-V: Add Hyper-V stub IOMMU driver From: lantianyu1986@...il.com <lantianyu1986@...il.com> Sent: Wednesday, February 27, 2019 6:54 AM > > On the bare metal, enabling X2APIC mode requires interrupt remapping > function which helps to deliver irq to cpu with 32-bit APIC ID. > Hyper-V doesn't provide interrupt remapping function so far and Hyper-V > MSI protocol already supports to deliver interrupt to the CPU whose > virtual processor index is more than 255. IO-APIC interrupt still has > 8-bit APIC ID limitation. > > This patch is to add Hyper-V stub IOMMU driver in order to enable > X2APIC mode successfully in Hyper-V Linux guest. The driver returns X2APIC > interrupt remapping capability when X2APIC mode is available. Otherwise, > it creates a Hyper-V irq domain to limit IO-APIC interrupts' affinity > and make sure cpus assigned with IO-APIC interrupt have 8-bit APIC ID. > > Define 24 IO-APIC remapping entries because Hyper-V only expose one > single IO-APIC and one IO-APIC has 24 pins according IO-APIC spec( > https://pdos.csail.mit.edu/6.828/2016/readings/ia32/ioapic.pdf). > > Reviewed-by: Michael Kelley <mikelley@...rosoft.com> > Signed-off-by: Lan Tianyu <Tianyu.Lan@...rosoft.com> Reconfirming my reviewed-by after the change to fix the compile error detected by the kbuild test robot. Reviewed-by: Michael Kelley <mikelley@...rosoft.com>
Powered by blists - more mailing lists