From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:52584) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RcfQg-0000BI-2G for qemu-devel@nongnu.org; Mon, 19 Dec 2011 10:47:09 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RcfQZ-000460-T1 for qemu-devel@nongnu.org; Mon, 19 Dec 2011 10:47:05 -0500 Received: from casper.infradead.org ([85.118.1.10]:45578) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RcfQZ-00045e-Lj for qemu-devel@nongnu.org; Mon, 19 Dec 2011 10:46:59 -0500 Message-ID: <1324309598.2132.12.camel@shinybook.infradead.org> From: David Woodhouse Date: Mon, 19 Dec 2011 15:46:38 +0000 In-Reply-To: <20111219001125.GA30390@truffala.fritz.box> References: <1323930340-24055-1-git-send-email-david@gibson.dropbear.id.au> <1323972307.2437.19.camel@x201.home> <20111216145353.GA29877@amd.com> <20111219001125.GA30390@truffala.fritz.box> Content-Type: multipart/signed; micalg="sha1"; protocol="application/x-pkcs7-signature"; boundary="=-/dCIDi7M8EYMqTgxNQ1N" Mime-Version: 1.0 Subject: Re: [Qemu-devel] [RFC] Device isolation infrastructure v2 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: David Gibson Cc: chrisw@redhat.com, aik@ozlabs.ru, Joerg Roedel , joro@8bytes.org, rusty@rustcorp.com.au, agraf@suse.de, iommu@lists.linux-foundation.org, qemu-devel@nongnu.org, B08248@freescale.com, Alex Williamson , scottwood@freescale.com, linux-kernel@vger.kernel.org --=-/dCIDi7M8EYMqTgxNQ1N Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Mon, 2011-12-19 at 11:11 +1100, David Gibson wrote: > They have no inbuilt concept > of domains (though we could fake in software in some circumstances). That sentence doesn't make much sense to me. Either you're saying that every device behind a given IOMMU is in *one* domain (i.e. there's one domain per PCI host bridge), or you're saying that each device has its *own* domain (maximum isolation, but still perhaps not really true if you end up with PCIe-to-PCI bridges or broken hardware such as the ones we've been discovering, where multifunction devices do their DMA from the wrong function). Either way, you *do* have domains. You just might not have thought about it before. --=20 dwmw2 --=-/dCIDi7M8EYMqTgxNQ1N Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIITvzCCBi0w ggQVoAMCAQICAwCtOTANBgkqhkiG9w0BAQUFADBUMRQwEgYDVQQKEwtDQWNlcnQgSW5jLjEeMBwG A1UECxMVaHR0cDovL3d3dy5DQWNlcnQub3JnMRwwGgYDVQQDExNDQWNlcnQgQ2xhc3MgMyBSb290 MB4XDTEwMDYxMjEwMDMwMFoXDTEyMDYxMTEwMDMwMFowgegxGDAWBgNVBAMTD0RhdmlkIFdvb2Ro b3VzZTEiMCAGCSqGSIb3DQEJARYTZHdtdzJAaW5mcmFkZWFkLm9yZzEfMB0GCSqGSIb3DQEJARYQ ZGF2aWRAd29vZGhvdS5zZTEoMCYGCSqGSIb3DQEJARYZZGF2aWQud29vZGhvdXNlQGludGVsLmNv bTEkMCIGCSqGSIb3DQEJARYVZHdtdzJAbGludXguaW50ZWwuY29tMTcwNQYJKoZIhvcNAQkBFigx MDg3MmEwN2Y2ZDdlMWUwN2Y1NWZmMTcyYTAzYjMwMGVlYWFkMjAzMIIBIjANBgkqhkiG9w0BAQEF AAOCAQ8AMIIBCgKCAQEA29OPhNvMxBMW83psWdVhZDtmJvgN+tBEp1r6MZamONsR0k81a6fDFwJz 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