linux-kernel - Re: [PATCH 1/7] iommu/vt-d: Add domain_alloc

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

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20241011132252.GJ762027@ziepe.ca>
Date: Fri, 11 Oct 2024 10:22:52 -0300
From: Jason Gunthorpe <jgg@...pe.ca>
To: Lu Baolu <baolu.lu@...ux.intel.com>
Cc: iommu@...ts.linux.dev, Joerg Roedel <joro@...tes.org>,
	Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
	Kevin Tian <kevin.tian@...el.com>, Yi Liu <yi.l.liu@...el.com>,
	Vasant Hegde <vasant.hegde@....com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/7] iommu/vt-d: Add domain_alloc_paging support

On Fri, Oct 11, 2024 at 12:27:16PM +0800, Lu Baolu wrote:

> +static struct iommu_domain *intel_iommu_domain_alloc_paging(struct device *dev)
> +{
> +	struct dmar_domain *dmar_domain;
> +	bool first_stage;
> +
> +	first_stage = first_level_by_default(0);
> +	dmar_domain = paging_domain_alloc(dev, first_stage);
> +	if (IS_ERR(dmar_domain))
> +		return ERR_CAST(dmar_domain);
> +
> +	return &dmar_domain->domain;
> +}

With the direction that Vasant's series is going in, I think this
should be skipped and instead your other patch to make
domain_alloc_user (which we will rename) a full functional replacement
is the right thing.

Jason