From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Williamson Subject: Re: [PATCH] On unmap, flush IOMMU TLB and return correct size Date: Wed, 25 Sep 2013 13:44:03 -0600 Message-ID: <1380138243.5197.20.camel@ul30vt.home> References: <1379818740.2547.51.camel@shinybook.infradead.org> <20130925155459.GA20372@8bytes.org> <1380125113.28494.14.camel@i7.infradead.org> <1380130588.3030.342.camel@ul30vt.home> <1380135148.28494.26.camel@i7.infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <1380135148.28494.26.camel-W2I5cNIroUsVm/YvaOjsyQ@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: "Singh, Varinder" , "Sundaram, Rajesh" , "Kimmel, Jeff" , "iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org" , "Shankar, Hari" , "Spiller, John" List-Id: iommu@lists.linux-foundation.org T24gV2VkLCAyMDEzLTA5LTI1IGF0IDE5OjUyICswMTAwLCBEYXZpZCBXb29kaG91c2Ugd3JvdGU6 Cj4gT24gV2VkLCAyMDEzLTA5LTI1IGF0IDExOjM2IC0wNjAwLCBBbGV4IFdpbGxpYW1zb24gd3Jv dGU6Cj4gPiBPbiBXZWQsIDIwMTMtMDktMjUgYXQgMTc6MDUgKzAxMDAsIERhdmlkIFdvb2Rob3Vz ZSB3cm90ZToKPiA+ID4gV2h5IHdvdWxkIGl0IGV2ZXIgY2FyZT8gSWYgaXQgKmhhcHBlbnMqIHRv IG1hcCBzb21ldGhpbmcgdGhhdCBjYW4gdXNlCj4gPiA+IGxhcmdlIHBhZ2VzLCB5YXkhLiBJZiBp dCBzdWJzZXF1ZW50bHkgYnJlYWtzIGFwYXJ0IHRob3NlIGxhcmdlIHBhZ2VzIGJ5Cj4gPiA+IHVu bWFwcGluZyA0S2lCIGluIHRoZSBtaWRkbGUsIGxldCB0aGUgSU9NTVUgZHJpdmVyIGJyZWFrIHRo YXQgYXBhcnQuCj4gPiAKPiA+IENhbiB0aGlzIGJlIGRvbmUgYXRvbWljYWxseT8gIEkgdGhvdWdo dCBwYXJ0IG9mIHRoZSByZWFzb24gZm9yIHRoaXMKPiA+IGludGVyZmFjZSB3YXMgdGhhdCBpb21t dSBkcml2ZXJzIHR5cGljYWxseSBjb3VsZG4ndCByZXBsYWNlIGEgaHVnZSBwYWdlCj4gPiB3aXRo IG11bHRpcGxlIHNtYWxsZXIgcGFnZXMgaW4gdGhlIHByZXNlbmNlIG9mIERNQS4KPiAKPiBGb3Ig dGhlIEludGVsIElPTU1VIGl0IGNhbi4gWW91IGNhbiBhdG9taWNhbGx5IGNoYW5nZSBmcm9tIGEg bGFyZ2UgcGFnZQo+IGVudHJ5LCB0byBhIHBvaW50ZXIgdG8gYSBmdWxsIHNldCBvZiBzbWFsbGVy IHBhZ2UgdGFibGVzLiBEbyB0aGUgSU9UTEIKPiBmbHVzaCwgYW5kIGF0IG5vIHRpbWUgaXMgdGhl cmUgYW4gaW50ZXJydXB0aW9uIGluIHNlcnZpY2UuCgpDb29sCgo+IE5vdCBzdXJlIGlmIHRoaXMg aXMgdHJ1ZSBmb3IgKmFsbCogSU9NTVUgaGFyZHdhcmU7IEknZCBiZSBwZXJmZWN0bHkKPiBoYXBw eSB0byBhY2NlcHQgYSB2YXJpYW50IG9mIErDtnJnJ3MgcHJvcG9zYWwgdGhhdCB3ZSBzaG91bGQg b25seSBldmVyCj4gdW5tYXAgZXhhY3RseSB0aGUgc2FtZSByYW5nZSB0aGF0IHdlIG1hcHBlZC4g RXhjZXB0IHdlIHNob3VsZCBhbGxvdyB0aGUKPiB1bm1hcHBpbmcgb2YgYWRqYWNlbnQgcmVnaW9u cyB0b2dldGhlcjsganVzdCBub3QgYSBwYXJ0aWFsIHVubWFwIG9mCj4gc29tZXRoaW5nIHRoYXQg d2FzIG1hcHBlZCBpbiBvbmUgZ28uCgpXZWxsLCBleGNlcHQgaWYgd2UndmUganVzdCB0cnVzdGVk IHRoZSBJT01NVSBkcml2ZXIgdG8gYWRkIGEgZGV2aWNlCmJlaGluZCBhIG5vbi1TUCBjYXBhYmxl IElPTU1VIHRvIG91ciBkb21haW4gYW5kIGNvbnZlcnQgdGhlIHBhZ2UgdGFibGVzLAp0aGF0IHBh cnRpYWwgdW5tYXAgaXMgbm8gbG9uZ2VyIHBhcnRpYWwgYW5kIG5vdyB3ZSBnZXQgZGlmZmVyZW50 CmJlaGF2aW9yIHRoYW4gYmVmb3JlIHNvIHdlIGNhbid0IGRlcGVuZCBvbiB0aGF0IGFkamFjZW50 IHVubWFwcGluZy4KCj4gPiA+IFNlcmlvdXNseSwganVzdCB0aGUgYWRkcmVzcyBhbmQgdGhlIHNp emUuIExldCB0aGUgSU9NTVUgY29kZSBkZWFsIHdpdGgKPiA+ID4gd2hldGhlciBpdCBjYW4gKmFj dHVhbGx5KiB1c2UgbGFyZ2UgcGFnZXMgb24gdGhlIHBhcnRpY3VsYXIgc2V0IG9mCj4gPiA+IElP TU1VcyB0aGF0IGFyZSBpbiB1c2UgZm9yIHRoZSBkZXZpY2VzIHlvdSd2ZSBhZGRlZCB0byB0aGUg ZG9tYWluIHNvCj4gPiA+IGZhci4KPiA+IAo+ID4gWW91J3JlIGNvbnRyYWRpY3RpbmcgeW91cnNl bGYgaGVyZS4gIEp1c3QgbGV0IHRoZSBpb21tdSBkZWFsIHdpdGggaXQsCj4gPiBidXQgbm93IHlv dSdyZSByYWlzaW5nIGNvbmNlcm5zIHRoYXQgSW50ZWwgbWF5IGJlIG1peGluZyBzdXBlciBwYWdl Cj4gPiBJT01NVSBoYXJkd2FyZSB3aXRoIG5vbi1zdXBlciBwYWdlIElPTU1VIGhhcmR3YXJlIG9u IHRoZSBzYW1lIGJveCwgc28gSQo+ID4gZG8gbmVlZCB0byBiZSBjb25jZXJuZWQsIHlldCB0aGVy ZSdzIG5vIGludGVyZmFjZSB0byBkaXNjb3ZlciBzdXBlciBwYWdlCj4gPiBzdXBwb3J0LiAKPiAK PiBObyBjb250cmFkaWN0aW9uLiBEbyBOb3QgQ29uY2VybiBZb3Vyc2VsZi4gSnVzdCB0ZWxsIHRo ZSBJT01NVSB3aGF0IHlvdQo+IHdhbnQgbWFwcGVkLCBhbmQgd2hlcmUuIExldCAqaXQqIHdvcnJ5 IGFib3V0IHdoZXRoZXIgaXQgY2FuIHVzZQo+IHN1cGVycGFnZXMgb3Igbm90LiBMaWtlIGl0IGFs cmVhZHkgKmRvZXMqLgoKSSdkIGxvdmUgdG8gYmUgYWJsZSB0byBkbyB0aGF0LCBidXQuLi4KCj4g PiAgV2hhdCBoYXBwZW5zIGlmIG15IElPTU1VIGRvbWFpbiBtYWtlcyB1c2Ugb2Ygc3VwZXIgcGFn ZXMgYW5kCj4gPiB0aGVuIEkgYWRkIGEgbmV3IGRldmljZSBiZWhpbmQgYSBuZXcgSU9NTVUgd2l0 aG91dCBoYXJkd2FyZSBzdXBlciBwYWdlCj4gPiBzdXBwb3J0PyAKPiAKPiBDdXJyZW50bHksIHlv dSBlbmQgdXAgd2l0aCB0aGUgZG9tYWluIGhhcHBpbHkgaW5jbHVkaW5nIHN1cGVycGFnZXMsIGFu ZAo+IHRoZSBsZXNzIGNhcGFibGUgSU9NTVUgdGhhdCB5b3UgYWRkZWQgbGF0ZXIgd29uJ3QgY29w ZS4KClRoaXMgaXMgdGhlIHRyb3VibGUgd2l0aCB0cnVzdGluZyB0aGUgaW9tbXUgZHJpdmVyLiA7 KQoKPiAgV2hhdCB3ZSBwcm9iYWJseQo+ICpvdWdodCogdG8gZG8gaXMgd2FsayB0aGUgcGFnZSB0 YWJsZXMgYW5kIGNvbnZlcnQgYW55IHByZS1leGlzdGluZwo+IHN1cGVycGFnZXMgdG8gc21hbGwg cGFnZXMsIGF0IHRoZSB0aW1lIHdlIGFkZCB0aGUgbm9uLVNQLWNhcGFibGUgSU9NTVUuCgpBbmQg dGhlbiB3ZSBuZWVkIHRvIGZpZ3VyZSBvdXQgaG93IHRvIGhhbmRsZSB0aGF0IGluIHRoZSBwcm9w b3NlZAppbnRlcmZhY2UgY2hhbmdlcyBhYm92ZSBzaW5jZSBpdCBjaGFuZ2VzIHRoZSB1bm1hcCBi ZWhhdmlvciB0byB0aGUgbmFpdmUKdXNlci4gIFRoZXJlJ3MgYWxzbyB0aGUgcXVlc3Rpb24gb2Yg d2hldGhlciB0aGUgSU9NTVUgZHJpdmVyIHNob3VsZApyZS1ldmFsdWF0ZSBzdXBlciBwYWdlcyB3 aGVuIHRoZSBsZXNzIGNhcGFibGUgSU9NTVUgaXMgcmVtb3ZlZCBmcm9tIHRoZQpkb21haW4uCgo+ IEZXSVcgd2UgY3VycmVudGx5IHNjcmV3IHVwIHRoZSBoYW5kbGluZyBvZiBjYWNoZS1jb2hlcmVu dCB2cy4KPiBub24tY29oZXJlbnQgcGFnZSB0YWJsZXMgdG9vLiBUaGF0IG9uZSB3YW50cyBhIHdi aW52ZCBzb21ld2hlcmUgd2hlbiB3ZQo+IGFkZCBhIG5vbi1jb2hlcmVudCBJT01NVSB0byB0aGUg ZG9tYWluLgoKWW91J3JlIG5vdCBzZWxsaW5nIHRoZSAidHJ1c3QgdGhlIElPTU1VIGRyaXZlciIg c3RvcnkgdmVyeSB3ZWxsIGhlcmUuCkNhbiB3ZSBhc3N1bWUgdGhhdCB0aGUgSU9NTVVfQ0FDSEUg ZmxhZyAoU05QKSBpcyBpZ25vcmVkIGFwcHJvcHJpYXRlbHkKYnkgbm9uLWNvaGVyZW50IElPTU1V cz8gIElzIHRoZXJlIGFueSBkb3duc2lkZSB0byBpZ25vcmluZyBpdCBhbmQgYWx3YXlzCnNldHRp bmcgU05QIGluIHRoZSBJT01NVSBwYWdlIHRhYmxlcz8gIEFNRCBJT01NVSBpZ25vcmVzIGl0LCBi dXQgaXQncwphbHNvIGFsd2F5cyBjYWNoZSBjb2hlcmVudC4gIFRoYW5rcywKCkFsZXgKCl9fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmlvbW11IG1haWxpbmcg bGlzdAppb21tdUBsaXN0cy5saW51eC1mb3VuZGF0aW9uLm9yZwpodHRwczovL2xpc3RzLmxpbnV4 Zm91bmRhdGlvbi5vcmcvbWFpbG1hbi9saXN0aW5mby9pb21tdQ==