linux-kernel - Re: [PART2 PATCH v7 12/12] svm: Implements update_pi

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Message-ID: <20160831040751.GA31840@potion>
Date:   Wed, 31 Aug 2016 06:07:51 +0200
From:   Radim Krčmář <rkrcmar@...hat.com>
To:     Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
Cc:     joro@...tes.org, pbonzini@...hat.com, alex.williamson@...hat.com,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        sherry.hurwitz@....com
Subject: Re: [PART2 PATCH v7 12/12] svm: Implements update_pi_irte hook to
 setup posted interrupt

2016-08-23 13:52-0500, Suravee Suthikulpanit:
> From: Suravee Suthikulpanit <suravee.suthikulpanit@....com>
> 
> This patch implements update_pi_irte function hook to allow SVM
> communicate to IOMMU driver regarding how to set up IRTE for handling
> posted interrupt.
> 
> In case AVIC is enabled, during vcpu_load/unload, SVM needs to update
> IOMMU IRTE with appropriate host physical APIC ID. Also, when
> vcpu_blocking/unblocking, SVM needs to update the is-running bit in
> the IOMMU IRTE. Both are achieved via calling amd_iommu_update_ga().
> 
> However, if GA mode is not enabled for the pass-through device,
> IOMMU driver will simply just return when calling amd_iommu_update_ga.
> 
> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@....com>
> ---

I forgot nitpicks in the office before going on a vacation, ;)

Reviewed-by: Radim Krčmář <rkrcmar@...hat.com>