From: Joerg Roedel Subject: Re: [RFC PATCH] iommu/vt-d: Add IOTLB flush support for kernel addresses Date: Fri, 23 Oct 2015 14:42:58 +0200 Message-ID: <20151023124257.GB27420@8bytes.org> References: <1445356379.4486.56.camel@infradead.org> <20151020160328.GV27420@8bytes.org> <1445357824.4486.65.camel@infradead.org> <20151023102043.GZ27420@8bytes.org> <1445596413.4113.175.camel@infradead.org> <20151023110359.GA27420@8bytes.org> <1445600226.4113.196.camel@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Content-Disposition: inline In-Reply-To: <1445600226.4113.196.camel-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: David Woodhouse Cc: "linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org" , iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, Sudeep Dutt List-Id: iommu@lists.linux-foundation.org T24gRnJpLCBPY3QgMjMsIDIwMTUgYXQgMTI6Mzc6MDZQTSArMDEwMCwgRGF2aWQgV29vZGhvdXNl IHdyb3RlOgo+IEl0J3MgbW9yZSB0aGFuIHRoYXQg4oCUIGl0J3MgZXF1aXZhbGVudCB0byB0aGUg c2l0dWF0aW9uICp3aXRoKiB0aGUKPiBJT01NVS4KPiAKPiBIYXZpbmcgYSAqc2VwYXJhdGUqIFBB U0lEIHdoaWNoIGlzIHRoZSBvbmx5IFBBU0lEIHdlIGNhbiB1c2UgZm9yIGtlcm5lbAo+IG1vZGUg aXMgKm5vdCogYSBzZWN1cml0eSBpbXByb3ZlbWVudC4gSW4gdGhlIGdlbmVyYWwgY2FzZSwgaWYg YSB1c2VyCj4gY2FuIHRyaWNrIHRoZSBkZXZpY2UgaW50byBzZXR0aW5nIHRoZSAnc3VwZXJ2aXNv ciBtb2RlJyBiaXQgb24gYSBnaXZlbgo+IGFjY2VzcywgaXQgY291bGQgcHJvYmFibHkganVzdCBh cyBlYXNpbHkgdHJpY2sgdGhlIGRldmljZSBpbnRvIHVzaW5nCj4gdGhlIHNlcGFyYXRlIGtlcm5l bCBQQVNJRCBmb3IgdGhhdCBhY2Nlc3MuIEluIG5laXRoZXIgY2FzZSBpcyBpdCBhcwo+IHNpbXBs ZSBhcyBqdXN0IGFza2luZyB0aGUgZGV2aWNlIHRvIHVzZSBhIGtlcm5lbCBhZGRyZXNzLgo+IAo+ IEknbSBub3QgcHJvcG9zaW5nIGl0IGZvciB0aGF0IHJlYXNvbiwgd2hpY2ggaXMgd2h5IEknbSBv YmplY3RpbmcgdG8KPiB5b3VyICd3ZSBoYXZlIHRvLi4uJyByZXNwb25zZS4gQWx0aG91Z2ggbWF5 YmUgSSBzaG91bGQgc2h1dCB1cCwgYmVjYXVzZQo+IEknbSBwbGVhc2VkIHlvdSBhcmVuJ3Qgb2Jq ZWN0aW5nIHRvIG15IHBsYW4gYW5kIHNheWluZyB0aGF0IHdlICpkbyoKPiBuZWVkIHRvIHBlcm1p dCBzdXBlcnZpc29yLW1vZGUgYWNjZXNzIGluIG5vcm1hbCBQQVNJRHMuCgpBdCBiZXN0IEknZCBs aWtlIHRvIGF2b2lkIHN1cGVydmlzb3IgYWNjZXNzIGZvciBkZXZpY2VzIGF0IGFsbCwgYnV0CnRo ZXJlIHNlZW1zIHRvIGJlIGEgbmVlZCBmb3IgaXQsIHNvIEkgbG9va3MgbGlrZSB3ZSBuZWVkIHRv IHByb3ZpZGUgaXQuClRoZXJlZm9yZSBJIHRoaW5rIHRoYXQgeW91ciBpZGVhIHRvIGhhdmUgYSBz ZXBlcmF0ZSBQQVNJRCBmb3Iga2VybmVsCmFjY2VzcywgYW5kIG9ubHkga2VybmVsIGFjY2Vzcywg aXMgYSBnb29kIG9uZS4gV2UgZXZlbiBkb24ndCBuZWVkIHRvIHVzZQphIGRlZmluZWQgUEFTSUQs IHdlIGNhbiByYW5kb21pemUgdGhlIFBBU0lEIHVzZWQgZm9yIGtlcm5lbCBhY2Nlc3NlcyBhbmQK bWFrZSBpdCBoYXJkZXIgdG8gZ3Vlc3MgdGhpcyB3YXkuCgpCdXQgaGF2aW5nIGJvdGgsIGtlcm5l bCBhbmQgc3VwZXJ2aXNvciBhY2Nlc3MsIGFsbG93ZWQgZm9yIGEgUEFTSUQgaXMKYW5vdGhlciBz dG9yeSwgYW5kIEkgdGhpbmsgd2UgbmVlZCB0byBiZSBjYXJlZnVsIHdpdGggdGhhdCAob3IgYXQg bGVhc3QKYXZvaWQgdGhhdCB0aGUgZHJpdmVyIHdyaXRlcnMgbmVlZCB0byBjYXJlIHRoYXQgbXVj aCBhYm91dCBpdCB0byBwcmV2ZW50CnVzZXJzcGFjZSBmcm9tIGdldHRpbmcgYWNjZXNzIHRvIGtl cm5lbCBtZW1vcnkpLgoKPiBZb3UgbWVhbiBhbiBpbmxpbmUgZnVuY3Rpb24gd2hpY2ggY2hlY2tz IGZvciBpb21tdS0+a2VybmVsX3N2bSDiiIAgaW9tbXU/Cj4gQW5kIGRvZXMgdGhlIGVxdWl2YWxl bnQgZm9yIG90aGVyIElPTU1Vcz8gSSB3b3VsZG4ndCB3YW50IElPTU1VCj4gLXNwZWNpZmljIGNv ZGUgaW4gdGhlcmU7IGp1c3QgYSBkZWNpc2lvbiBhYm91dCB3aGV0aGVyIHRvIGNhbGwgdGhlIG91 dAo+IC1vZi1saW5lIGZ1bmN0aW9uLgo+IAo+IE9yIG1heWJlIGlmIHdlIGFyZSBtYWtpbmcgUEFT SUQgaGFuZGxpbmcgZ2VuZXJpYyBhbmQgc3lzdGVtLXdpZGUsIGl0Cj4gcmVhbGx5IGRvZXMgYmVj b21lIGEgY2FzZSBvZiAnaWYgKGluaXRfbW0ucGFzaWQgIT0gLTEpJyAuLi4/CgpZZXMsIHNvbWV0 aGluZyBsaWtlIHRoYXQsIGFuZCBvZiBjb3Vyc2UgaW5kZXBlbmRlbnQgb2YgdGhlIGlvbW11LiBX aGVuCndlIGhhdmUgYSBzeXN0ZW0td2lkZSBQQVNJRCByZWdpc3RyeSB3ZSBjYW4gY2hlY2sgYWdh aW5zdCB0aGF0LCBvcgppbnRyb2R1Y2UgYSBnbG9iYWwgcmVhZF9tb3N0bHkgZmxhZy4gVXNpbmcg aW5pdF9tbSByZWZjb3VudGluZyBvciBmbGFncwphbHNvIHNvdW5kcyBsaWtlIGEgZ29vZCBpZGVh LgoKCglKb2VyZwoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X18KaW9tbXUgbWFpbGluZyBsaXN0CmlvbW11QGxpc3RzLmxpbnV4LWZvdW5kYXRpb24ub3JnCmh0 dHBzOi8vbGlzdHMubGludXhmb3VuZGF0aW9uLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2lvbW11