linux-kernel - RE: [PATCH v6 16/16] iommu/hyperv: setup an IO-APIC IRQ remapping domain for root partition

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Message-ID: <MWHPR21MB159329D4EA13215C208D7828D7B39@MWHPR21MB1593.namprd21.prod.outlook.com>
Date:   Thu, 4 Feb 2021 17:53:55 +0000
From:   Michael Kelley <mikelley@...rosoft.com>
To:     Wei Liu <wei.liu@...nel.org>,
        Linux on Hyper-V List <linux-hyperv@...r.kernel.org>
CC:     "virtualization@...ts.linux-foundation.org" 
        <virtualization@...ts.linux-foundation.org>,
        Linux Kernel List <linux-kernel@...r.kernel.org>,
        Vineeth Pillai <viremana@...ux.microsoft.com>,
        Sunil Muthuswamy <sunilmut@...rosoft.com>,
        Nuno Das Neves <nunodasneves@...ux.microsoft.com>,
        "pasha.tatashin@...een.com" <pasha.tatashin@...een.com>,
        KY Srinivasan <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>, Joerg Roedel <joro@...tes.org>,
        Will Deacon <will@...nel.org>,
        "open list:IOMMU DRIVERS" <iommu@...ts.linux-foundation.org>
Subject: RE: [PATCH v6 16/16] iommu/hyperv: setup an IO-APIC IRQ remapping
 domain for root partition

From: Wei Liu <wei.liu@...nel.org> Sent: Wednesday, February 3, 2021 7:05 AM
> 
> Just like MSI/MSI-X, IO-APIC interrupts are remapped by Microsoft
> Hypervisor when Linux runs as the root partition. Implement an IRQ
> domain to handle mapping and unmapping of IO-APIC interrupts.
> 
> Signed-off-by: Wei Liu <wei.liu@...nel.org>
> ---
> v6:
> 1. Simplify code due to changes in a previous patch.
> ---
>  arch/x86/hyperv/irqdomain.c     |  25 +++++
>  arch/x86/include/asm/mshyperv.h |   4 +
>  drivers/iommu/hyperv-iommu.c    | 177 +++++++++++++++++++++++++++++++-
>  3 files changed, 203 insertions(+), 3 deletions(-)
> 

Reviewed-by: Michael Kelley <mikelley@...rosoft.com>