linux-kernel - Re: [PATCH v3 07/10] iommu/vt-d: Keep swiotlb on if bounce page is necessary

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: <20190422164720.GB31181@lst.de>
Date:   Mon, 22 Apr 2019 18:47:20 +0200
From:   Christoph Hellwig <hch@....de>
To:     Lu Baolu <baolu.lu@...ux.intel.com>
Cc:     David Woodhouse <dwmw2@...radead.org>,
        Joerg Roedel <joro@...tes.org>, ashok.raj@...el.com,
        jacob.jun.pan@...el.com, alan.cox@...el.com, kevin.tian@...el.com,
        mika.westerberg@...ux.intel.com, pengfei.xu@...el.com,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Christoph Hellwig <hch@....de>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Robin Murphy <robin.murphy@....com>,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...el.com>
Subject: Re: [PATCH v3 07/10] iommu/vt-d: Keep swiotlb on if bounce page is
 necessary

On Sun, Apr 21, 2019 at 09:17:16AM +0800, Lu Baolu wrote:
> +static inline bool platform_has_untrusted_device(void)
>  {
> +	bool has_untrusted_device = false;
>  	struct pci_dev *pdev = NULL;
>  
>  	for_each_pci_dev(pdev) {
>  		if (pdev->untrusted) {
> +			has_untrusted_device = true;
>  			break;
>  		}
>  	}
>  
> +	return has_untrusted_device;

This shouldn't really be in the intel-iommu driver, should it?
This probably should be something like pci_has_untrusted_devices
and be moved to the PCI code.