linux-kernel - Re: PCIe PASID (Process Address Space ID) and iommu code

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: <CAErSpo5YXZ8YRzhg0xvbHGCr22o+_+yi7HrCCBYBM9Ke42okJQ@mail.gmail.com>
Date:	Wed, 15 Oct 2014 21:50:58 -0600
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Kallol Biswas <nucleodyne@...il.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Joerg Roedel <joro@...tes.org>,
	"open list:INTEL IOMMU (VT-d)" <iommu@...ts.linux-foundation.org>,
	Suravee Suthikulpanit <suravee.suthikulpanit@....com>,
	Jay Cornwall <jay.cornwall@....com>
Subject: Re: PCIe PASID (Process Address Space ID) and iommu code

[+cc Joerg, Suravee, Jay, iommu list, linux-pci]

On Wed, Oct 15, 2014 at 5:44 PM, Kallol Biswas <nucleodyne@...il.com> wrote:
> Resending, as message got bounced for html content.
> --------------------------------------------
> Hi,
>     PCIe has introduced PASID TLP Prefix.  There are two ECNs on this.
>
> It seems that AMD iommu code makes use of PASID. Is there a device that
> utilizes this TLP prefix?
>
> PASID allocation and management within a device is not clear to me. How
> does device know which PASID to issue for which virtual address? Who makes
> the association? Must be software/OS, but how? There is no table for this
> like MSI-X table.
>
> Any pointer/documentation will be appreciated.
>
> Regards,
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@...r.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/