linux-kernel - Re: [PATCH v9 06/10] iommu/amd: Modify set_dte

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Message-ID: <20241101163248.GW10193@nvidia.com>
Date: Fri, 1 Nov 2024 13:32:48 -0300
From: Jason Gunthorpe <jgg@...dia.com>
To: Suravee Suthikulpanit <suravee.suthikulpanit@....com>
Cc: linux-kernel@...r.kernel.org, iommu@...ts.linux.dev, joro@...tes.org,
	robin.murphy@....com, vasant.hegde@....com, kevin.tian@...el.com,
	jon.grimm@....com, santosh.shukla@....com, pandoh@...gle.com,
	kumaranand@...gle.com
Subject: Re: [PATCH v9 06/10] iommu/amd: Modify set_dte_entry() to use
 256-bit DTE helpers

On Fri, Nov 01, 2024 at 04:23:00PM +0000, Suravee Suthikulpanit wrote:
> Also, the set_dte_entry() is used to program several DTE fields (e.g.
> stage1 table, stage2 table, domain id, and etc.), which is difficult
> to keep track with current implementation.
> 
> Therefore, separate logic for clearing DTE (i.e. make_clear_dte) and
> another function for setting up the GCR3 Table Root Pointer, GIOV, GV,
> GLX, and GuestPagingMode into another function set_dte_gcr3_table().
> 
> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@....com>
> ---
>  drivers/iommu/amd/amd_iommu.h       |   2 +
>  drivers/iommu/amd/amd_iommu_types.h |  13 +--
>  drivers/iommu/amd/init.c            |  30 ++++++-
>  drivers/iommu/amd/iommu.c           | 129 ++++++++++++++++------------
>  4 files changed, 106 insertions(+), 68 deletions(-)

Reviewed-by: Jason Gunthorpe <jgg@...dia.com>

Jason