From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 0E6FA90 for ; Mon, 26 Oct 2015 05:13:47 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id BDF43A1 for ; Mon, 26 Oct 2015 05:13:46 +0000 (UTC) Message-ID: <1445836422.3405.43.camel@infradead.org> From: David Woodhouse To: Joerg Roedel Date: Mon, 26 Oct 2015 14:13:42 +0900 In-Reply-To: <20151026050450.GF27420@8bytes.org> References: <1445833878.3405.24.camel@infradead.org> <20151026044350.GE27420@8bytes.org> <1445834882.3405.30.camel@infradead.org> <20151026050450.GF27420@8bytes.org> Content-Type: multipart/signed; micalg="sha-1"; protocol="application/x-pkcs7-signature"; boundary="=-31kfv5AWGY/JEd1f4CZo" Mime-Version: 1.0 Cc: Paolo Bonzini , m.smarduch@samsung.com, "ksummit-discuss@lists.linuxfoundation.org" Subject: Re: [Ksummit-discuss] Short topic: virtio vs IOMMU List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , --=-31kfv5AWGY/JEd1f4CZo Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Mon, 2015-10-26 at 06:04 +0100, Joerg Roedel wrote: > On Mon, Oct 26, 2015 at 01:48:02PM +0900, David Woodhouse wrote: > > It would be useful to have an emulated IOMMU, full stop. And yeah, it > > might actually make sense to *start* by using it for purely virtual > > devices, [...] >=20 > Sure, I think this is what qemu provides already, except for the virtio > devices (which are also emulated). I think it would be cool to have > virtio translated by the emulated iommu too (at least optional). Oh, wow. I didn't realise we already had an IOMMU implemented in Qemu. At first glance it looks like it doesn't support assigned devices... has anyone looked at doing so? --=20 dwmw2 --=-31kfv5AWGY/JEd1f4CZo Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIISjjCCBicw ggUPoAMCAQICAw3vNzANBgkqhkiG9w0BAQUFADCBjDELMAkGA1UEBhMCSUwxFjAUBgNVBAoTDVN0 YXJ0Q29tIEx0ZC4xKzApBgNVBAsTIlNlY3VyZSBEaWdpdGFsIENlcnRpZmljYXRlIFNpZ25pbmcx ODA2BgNVBAMTL1N0YXJ0Q29tIENsYXNzIDEgUHJpbWFyeSBJbnRlcm1lZGlhdGUgQ2xpZW50IENB MB4XDTE1MDUwNTA5NDM0MVoXDTE2MDUwNTA5NTMzNlowQjEcMBoGA1UEAwwTZHdtdzJAaW5mcmFk ZWFkLm9yZzEiMCAGCSqGSIb3DQEJARYTZHdtdzJAaW5mcmFkZWFkLm9yZzCCASIwDQYJKoZIhvcN AQEBBQADggEPADCCAQoCggEBAMkbm9kPbx1j/X4RVyf/pPKSYwelcco69TvnQQbKM8m8xkWjXJI1 jpJ1jMaGUZGFToINMSZi7lZawUozudWbXSKy1SikENSTJHffsdRAIlsp+hR8vWvjsKUry6sEdqPG doa5RY7+N4WRusWZDYW/RRWE6i9EL9qV86CVPYqw22UBOUw4/j/HVGCV6TSB8yE5iEwhk/hUuzRr 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