Date:   Mon, 13 Feb 2023 16:20:29 +0000
From:   Jean-Philippe Brucker <jean-philippe@linaro.org>
To:     Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc:     LKML <linux-kernel@vger.kernel.org>, iommu@lists.linux.dev,
        Lu Baolu <baolu.lu@linux.intel.com>,
        Joerg Roedel <joro@8bytes.org>,
        Jean-Philippe Brucker <jean-philippe@linaro.com>,
        Robin Murphy <robin.murphy@arm.com>,
        David Woodhouse <dwmw2@infradead.org>,
        Raj Ashok <ashok.raj@intel.com>,
        "Tian, Kevin" <kevin.tian@intel.com>, Yi Liu <yi.l.liu@intel.com>,
        Jason Gunthorpe <jgg@nvidia.com>
Subject: Re: [PATCH 2/2] iommu/ioasid: Remove custom IOASID allocator
Message-ID: <Y+pjTR80bnl9rMK1@myrica>
References: <20230210230206.3160144-1-jacob.jun.pan@linux.intel.com>
 <20230210230206.3160144-3-jacob.jun.pan@linux.intel.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20230210230206.3160144-3-jacob.jun.pan@linux.intel.com>
Precedence: bulk

On Fri, Feb 10, 2023 at 03:02:06PM -0800, Jacob Pan wrote:
> Custom allocator feature was introduced to support VT-d's virtual
> command, an enlightened interface designed for VMs to allocate PASIDs
> from the host.
> 
> As we remove/withdraw the VT-d virtual command feature, the sole user
> of custom allocator, we can safely remove the custom allocator as well.
> Effectively, this will return IOASID core to the original simple global
> namespace allocator.
> 
> Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>

You can also drop the spinlock.h include. With that:

Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>

On a related note, it looks like 100b8a14a370 ("iommu/vt-d: Add pasid
private data helpers") removed the last user of ioasid_set_data(). I guess
that could be dropped too, unless you plan to still use it?

We could also merge ioasid.c into iommu-sva.c at this point, since I
haven't seen any interest for having multiple IOASID sets on Arm, but I'm
not sure what the current plan is for vSVA on x86.

Thanks,
Jean