From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Woodhouse Subject: [PATCH 0/7] Enable SVM for Intel VT-d Date: Fri, 09 Oct 2015 00:50:23 +0100 Message-ID: <1444348223.92154.22.camel@infradead.org> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1310701644==" Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: iommu@lists.linux-foundation.org, intel-gfx@lists.freedesktop.org, "Barnes, Jesse" List-Id: iommu@lists.linux-foundation.org --===============1310701644== Content-Type: multipart/signed; micalg="sha-1"; protocol="application/x-pkcs7-signature"; boundary="=-azwV3kHqUZsctk+tm6zk" --=-azwV3kHqUZsctk+tm6zk Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable This patch set enables PASID support for the Intel IOMMU, along with page request support. Like its AMD counterpart, it exposes an IOMMU-specific API. I believe we'll have a session at the Kernel Summit later this month in which we can work out a generic API which will cover the two (now) existing implementations as well as upcoming ARM (and other?) versions. For the time being, however, exposing an Intel-specific API is good enough, especially as we don't have the required TLP prefix support on our PCIe root ports and we *can't* support discrete PCIe devices with PASID support. It's purely on-chip stuff right now, which is basically only Intel graphics. The AMD implementation allows a per-device PASID space, and managing the PASID space is left entirely to the device driver. In contrast, this implementation maintains a per-IOMMU PASID space, and drivers calling intel_svm_bind_mm() will be *given* the PASID that they are to use. In general we seem to be converging on using a single PASID space across *all* IOMMUs in the system, and this will support that mode of operation. --=20 David Woodhouse Open Source Technology Centre David.Woodhouse@intel.com Intel Corporation --=-azwV3kHqUZsctk+tm6zk 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 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