From mboxrd@z Thu Jan 1 00:00:00 1970 From: Oleksandr Tyshchenko Subject: Unshared IOMMU issues Date: Wed, 15 Feb 2017 17:52:26 +0200 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Xen Devel Cc: Julien Grall , Stefano Stabellini , Jan Beulich List-Id: xen-devel@lists.xenproject.org SGksIGFsbC4KCkFzIGl0IHdhcyBzdWdnZXN0ZWQgYnkgSnVsaWVuIGluIElSQyBJIG9wZW4gdGhp cyB0aHJlYWQuCgpDdXJyZW50bHksIEkgYW0gdHJ5aW5nIHRvIGFkZCBzdXBwb3J0IGZvciBJUE1N VSBpbiBYZW4uCkl0IGlzIFZNU0EtY29tcGF0aWJsZSBJT01NVSB0aGF0IGludGVncmF0ZWQgaW4g dGhlIG5ld2VzdCBSZW5lc2FzIFNvQ3MgKEFSTSkuClRoaXMgSVBNTVUgY2FuJ3Qgc2hhcmUgdGhl IHBhZ2UgdGFibGUgd2l0aCB0aGUgQ1BVIHNpbmNlIGl0IHVzZXMKc3RhZ2UtMSBwYWdlIHRhYmxl CnVubGlrZSB0aGUgQ1BVIHRoYXQgdXNlcyBzdGFnZS0yLgpTbywgdGhlIElQTU1VIGRyaXZlciBo YXMgb3duIHBhZ2UgdGFibGUgaW5zaWRlIGl0IGFuZCBtYWludGFpbnMgdGhlbQpsaWtlIG90aGVy ICJ1bnNoYXJlZCBJT01NVSIgZHJpdmVycyB1c3VhbGx5IGRvLgoKRm9yIHBhc3NpbmcgYWxsIG1h cHBpbmcgdXBkYXRlcyB2aWEgSU9NTVUgSSBzbGlnaHRseQptb2RpZmllZCBQMk0gY29kZSAocDJt X3NldF9lbnRyeSkgb24gQVJNIHRvIGNhbGwgaW9tbXVfbWFwX3BhZ2UvaW9tbXVfdW5tYXBfcGFn ZQppZiBmb2xsb3dpbmcgKG5lZWRfaW9tbXUocDJtLT5kb21haW4pICYmCiFpb21tdV91c2VfaGFw X3B0KHAybS0+ZG9tYWluKSkgaXMgdHJ1ZS4KSSBldmVuIG9wdGltaXplZCBhIGJpdCBieSBhZGRp bmcgaW9tbXVfbWFwX3BhZ2VzL2lvbW11X3VubWFwX3BhZ2VzIEFQSQphbmQgbWFwX3BhZ2VzL3Vu bWFwX3BhZ2VzIGZsYXRmb3JtIG9wcwpmb3IgcGFzc2luZyB0aGUgd2hvbGUgbWVtb3J5IGJsb2Nr IChuciBwYWdlcykgdG8gdGhlIElPTU1VIGNvZGUuIEJ1dAppdCBpcyBub3Qgc2NvcGUgb2YgdGhp cyB0aHJlYWQuCgpJIGZhY2VkIHNldmVyYWwgZ2VuZXJpYyBwcm9ibGVtcyB0aGF0IGhhZCBwcmV2 ZW50ZWQgbWUgZnJvbSBtYWtpbmcKSVBNTVUgZHJpdmVyIChidXQgaXQgbWlnaHQgYmUgYW5vdGhl ciAidW5zaGFyZWQgSU9NTVUiIGRyaXZlcikgaGFwcHkKaW5zaWRlIFhFTiBvbiBBUk0uCk1vc3Qg b2YgdGhlbSBJIGhhdmUgYWxyZWFkeSByZXNvbHZlZCBzb21laG93IGp1c3QgdG8gc2VlIHRoYXQg aXQKd29ya2VkIG91dCB3ZWxsIGZvciBtZSwgYnV0IEkgYW0gc3RpbGwgaGF2ZSBkb3VidHMgYWJv dXQgaG93IHRvIGRvIGl0CmluIGEgcmlnaHQgd2F5LgoKU28sIGZvciBhbGxvd2luZyBQMk0gY29y ZSB0byB1cGRhdGUgSU9NTVUgbWFwcGluZyBmcm9tIHRoZSBmaXJzdAoic2V0X2VudHJ5IiBhbmQg Zm9yICJ1bnNoYXJlZCBJT01NVSIgZHJpdmVyIHRvIGJlIHJlYWR5IHRvIGhhbmRsZQpJT01NVSBt YXBwaW5nIHVwZGF0ZXMKSSBkbyB0d28gdGhpbmdzOgoxLiBJIGFsd2F5cyBhbGxvY2F0ZSBJT01N VSBwYWdlIHRhYmxlIGluIGlvbW11X2RvbWFpbl9pbml0KCkgZm9yIGV2ZXJ5CmRvbWFpbiBldmVu IHRoaXMgZG9tYWluIHdvbid0IGhhdmUgYW55IGFzc2lnbmVkIGRldmljZXMgaW4gZnV0dXJlLgpU aGUgbWFpbiByZWFzb24gd2h5IEkgZG8gc28gaXMgbm90IHRvIHNraXAgYW55IElPTU1VIG1hcHBp bmcgdXBkYXRlcwpmcm9tIFAyTSBjb2RlIChSQU0sIE1NSU9zLCBldGMpLiBUaGUgSU9NTVUgZHJp dmVyIGhhcyB0byBiZSByZWFkeSBmb3IKcHJvY2Vzc2luZwpJT01NVSBtYXBwaW5nIHVwZGF0ZXMg ZnJvbSB0aGUgKnZlcnkgYmVnaW5uaW5nKi4KT2YgY291cnNlLCB0aGUgSU9NTVUgcGFnZSB0YWJs ZSB3aWxsIGJlIGNvbXBsZXRlbHkgZGVsZXRlZCBpbiBpb21tdV90ZWFyZG93bigpLgpCdXQsIGFu eXdheSBhbGxvY2F0aW5nIElPTU1VIHBhZ2UgdGFibGUgaWYgaXQgd29uJ3QgYmUgcmVhbGx5IHVz ZWQgaW4KZG9tYWluIGxvb2tzIG5vdCBnb29kLgpBbHRob3VnaCB0aGVyZSBpcyBhbiBhcmNoX2lv bW11X3BvcHVsYXRlX3BhZ2VfdGFibGUoKSBzb2x1dGlvbiB0aGF0CmNvdWxkIGhlbHAgaW4gYSBz dWNoIHNpdHVhdGlvbiwKYnV0IGl0IGRvZXMgbm90IGxvb2sgc3VpdGFibGUgZm9yIEFSTSBiZWNh dXNlIHdlIGhhdmUgbm8gd2F5IHRvCnRyYW5zbGF0ZSBhIE1GTiB0byBhIEdGTiBhcyBKdWxpZW4g aGFkIG5vdGljZWQgbWUgaW4gSVJDLgoKMi4gQW5vdGhlciBhY3Rpb24gSSBkbyBpcyB0byBleHBs aWNpdGx5IHNldCBuZWVkX2lvbW11IGZsYWcgZHVyaW5nCmFyY2hfaW9tbXVfZG9tYWluX2luaXQo KSBjYWxsIGluIEFSTSBwYXJ0IGlmIGZvbGxvd2luZwogKGlvbW11X2VuYWJsZWQgJiYgIWlzX2hh cmR3YXJlX2RvbWFpbihkKSAmJiAhaW9tbXVfdXNlX2hhcF9wdChkKSkgaXMgdHJ1ZS4KSSBkbyB0 aGF0IHNpbmNlIGluIGNhc2Ugb2YgZG9tVSBuZWVkX2lvbW11IGZsYWcgaXMgc2V0IGR1cmluZyBk ZXZpY2UKYXNzaWdubWVudCwgYnV0IGl0IGlzIHRvbyBsYXRlLiBGb3IgZG9tMCB3ZSBmb3JjZSBu ZWVkX2lvbW11IGZsYWcuClRoZXJlIGFyZSBtYW55IG1hcHBpbmcgdXBkYXRlcyB0byBQMk0gYnkg dGhlIHRpbWUgdGhlIGZpcnN0IGRldmljZQp3aWxsIGhhdmUgYmVlbiBhc3NpZ25lZC4KSSBzZWUg dGhlIHdheSBob3cgdGhpcyBhY3Rpb24gY2FuIGJlIGRyb3BwZWQuIEZvciBleGFtcGxlLCBkb24n dCByZWx5Cm9uIG5lZWRfaW9tbXUgZmxhZyBiZWZvcmUgdXBkYXRpbmcgSU9NTVUgbWFwcGluZyBm cm9tIFAyTSwKY2hlY2sgZm9yIGlvbW11X2VuYWJsZWQgZmxhZyBpbnN0ZWFkLgoKSSB0aGluaywg YnV0IEkgYW0gbm90IDEwMCUgc3VyZSB0aGF0IHdlIGNvdWxkIGF2b2lkIGFjdGlvbnMgYWJvdmUg aWYKd2Ugd291bGQgaGF2ZSBrbm93bGVkZ2UgYWJvdXQgZGV2aWNlIGFzc2lnbm1lbnQgZm9yIHBh cnRpY3VsYXIKZG9tYWluIGJlZm9yZSBtYWtpbmcgYW55IHVwZGF0ZXMgaW4gUDJNLgoKQ291bGQg eW91IHBsZWFzZSBzdWdnZXN0IG1lIGEgcmlnaHQgd2F5IGluIHJlc29sdmluZyBzdWNoIHByb2Js ZW1zPwoKLS0gClJlZ2FyZHMsCgpPbGVrc2FuZHIgVHlzaGNoZW5rbwoKX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApY ZW4tZGV2ZWxAbGlzdHMueGVuLm9yZwpodHRwczovL2xpc3RzLnhlbi5vcmcveGVuLWRldmVsCg==