From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Xu, Quan" Subject: Re: [PATCH v7 2/2] VT-d: Fix vt-d Device-TLB flush timeout issue Date: Thu, 17 Mar 2016 11:30:01 +0000 Message-ID: <945CA011AD5F084CBEA3E851C0AB28894B86673E@SHSMSX101.ccr.corp.intel.com> References: <1458198767-61293-1-git-send-email-quan.xu@intel.com> <1458198767-61293-3-git-send-email-quan.xu@intel.com> <56EA8A3F02000078000DDA2B@prv-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: Content-Language: en-US List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: "Tian, Kevin" , Jan Beulich Cc: "dario.faggioli@citrix.com" , "Wu, Feng" , "xen-devel@lists.xen.org" List-Id: xen-devel@lists.xenproject.org T24gTWFyY2ggMTcsIDIwMTYgNzoxNHBtLCBUaWFuLCBLZXZpbiA8a2V2aW4udGlhbkBpbnRlbC5j b20+IHdyb3RlOgo+ID4gRnJvbTogSmFuIEJldWxpY2ggW21haWx0bzpKQmV1bGljaEBzdXNlLmNv bV0KPiA+IFNlbnQ6IFRodXJzZGF5LCBNYXJjaCAxNywgMjAxNiA1OjQzIFBNCj4gPgo+ID4gPj4+ IE9uIDE3LjAzLjE2IGF0IDA5OjE3LCA8a2V2aW4udGlhbkBpbnRlbC5jb20+IHdyb3RlOgo+ID4g Pj4gIEZyb206IFh1LCBRdWFuCj4gPiA+PiBTZW50OiBUaHVyc2RheSwgTWFyY2ggMTcsIDIwMTYg MzoxMyBQTQo+ID4gPj4gLS0tIGEveGVuL2RyaXZlcnMvcGFzc3Rocm91Z2gvdnRkL3FpbnZhbC5j Cj4gPiA+PiArKysgYi94ZW4vZHJpdmVycy9wYXNzdGhyb3VnaC92dGQvcWludmFsLmMKPiA+ID4+ IEBAIC0yMzMsNiArMjMzLDU3IEBAIGludCBxaW52YWxfZGV2aWNlX2lvdGxiKHN0cnVjdCBpb21t dSAqaW9tbXUsCj4gPiA+PiAgICAgIHJldHVybiAwOwo+ID4gPj4gIH0KPiA+ID4+Cj4gPiA+PiAr c3RhdGljIHZvaWQgZGV2X2ludmFsaWRhdGVfaW90bGJfdGltZW91dChzdHJ1Y3QgaW9tbXUgKmlv bW11LCB1MTYgZGlkLAo+ID4gPj4gKyAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgdTE2IHNlZywgdTggYnVzLCB1OAo+ID4gPj4gK2RldmZuKSB7Cj4gPiA+PiArICAgIHN0 cnVjdCBkb21haW4gKmQgPSBOVUxMOwo+ID4gPj4gKyAgICBzdHJ1Y3QgcGNpX2RldiAqcGRldjsK PiA+ID4+ICsKPiA+ID4+ICsgICAgaWYgKCB0ZXN0X2JpdChkaWQsIGlvbW11LT5kb21pZF9iaXRt YXApICkKPiA+ID4+ICsgICAgICAgIGQgPSByY3VfbG9ja19kb21haW5fYnlfaWQoaW9tbXUtPmRv bWlkX21hcFtkaWRdKTsKPiA+ID4+ICsKPiA+ID4+ICsgICAgaWYgKCBkID09IE5VTEwgKQo+ID4g Pj4gKyAgICAgICAgcmV0dXJuOwo+ID4gPj4gKwo+ID4gPj4gKyAgICBwY2lkZXZzX2xvY2soKTsK PiA+ID4+ICsgICAgZm9yX2VhY2hfcGRldihkLCBwZGV2KQo+ID4gPgo+ID4gPiB3ZSBuZWVkIGEg J3NhZmUnIHZlcnNpb24gaGVyZSBzaW5jZSB5b3UncmUgZGVsZXRpbmcgbm9kZXMgd2hlbgo+ID4g PiB3YWxraW5nIGxpc3QuIGZvcl9lYWNoX3BkZXYgdG9kYXkgaXMgYmFzZWQgb24gbGlzdF9mb3Jf ZWFjaF9lbnRyeS4KPiA+ID4gT3IgaWYgaXQncyBzdXJlIHRoYXQgb25seSBvbmUgcGRldiBjYW4g bWF0Y2gsIHdlIGNhbiBicmVhayBvdXQgb2YKPiA+ID4gdGhlIGxvb3AgdG8gZG8gcmVtb3ZhbC4K PiA+Cj4gPiBCdXQgYnJlYWtpbmcgb3V0IG9mIHRoZSBsb29wIGlzIHdoYXQgaXMgYWxyZWFkeSBi ZWluZyBkb25lIC4uLgo+ID4KPiA+ID4+ICsgICAgewo+ID4gPj4gKyAgICAgICAgaWYgKCAoIHBk ZXYtPnNlZyA9PSBzZWcgKSAmJgo+ID4gPj4gKyAgICAgICAgICAgICAoIHBkZXYtPmJ1cyA9PSBi dXMgKSAmJgo+ID4gPj4gKyAgICAgICAgICAgICAoIHBkZXYtPmRldmZuID09IGRldmZuICkgKQo+ ID4gPj4gKyAgICAgICAgewo+ID4gPj4gKyAgICAgICAgICAgIEFTU0VSVCAoIHBkZXYtPmRvbWFp biApOwo+ID4gPj4gKyAgICAgICAgICAgIGxpc3RfZGVsKCZwZGV2LT5kb21haW5fbGlzdCk7Cj4g PiA+PiArICAgICAgICAgICAgcGRldi0+ZG9tYWluID0gTlVMTDsKPiA+ID4+ICsgICAgICAgICAg ICBwY2lfaGlkZV9leGlzdGluZ19kZXZpY2UocGRldik7Cj4gPiA+PiArICAgICAgICAgICAgYnJl YWs7Cj4gPgo+ID4gLi4uIGhlcmUuCj4gPgo+IAo+IGhvd2V2ZXIgeW91IHNlZSBsaXN0X2RlbCBo YXBwZW5zIGJlZm9yZSBicmVha2luZyBvdXQsIHJpZ2h0Pwo+IApGb3IgdGhlc2UgdmVyc2lvbiBv ZiBtYWNyb3M6CiAgYSkuIGxpc3RfZm9yX2VhY2hfZW50cnkgLSBpdGVyYXRlIG92ZXIgbGlzdCBv ZiBnaXZlbiB0eXBlCiAgYikuIGxpc3RfZm9yX2VhY2hfZW50cnlfc2FmZSAtIGl0ZXJhdGUgb3Zl ciBsaXN0IG9mIGdpdmVuIHR5cGUgc2FmZSBhZ2FpbnN0IHJlbW92YWwgb2YgbGlzdCBlbnRyeQoK X19paXVjX18sIEkgdGhpbmsgdGhlIGtleSBwb2ludCBpczoKICAtaW4gZ2VuZXJhbCwgd2UnZCBi ZXR0ZXIgcmVtb3ZlIGVudHJ5IHVuZGVyIGxpc3RfZm9yX2VhY2hfZW50cnlfc2FmZS4gWWVzLCBp dCBpcyBjb3JyZWN0IHRvIHVzZSBsaXN0X2Zvcl9lYWNoX2VudHJ5X3NhZmUgZm9yIHRoaXMgcG9p bnQgdG9vLgogIC0gSWYgd2UgZGVsZXRlIHRoZSBpdGVyYXRlIGZyb20gbGlzdF9mb3JfZWFjaF9l bnRyeSwgaXQgbWF5IHBvaW50IHRvIHVuZGVmaW5lZCBzdGF0ZSwgbGVhZGluZyB0byB4ZW4gcGFu aWMuCiAgIGJ1dCB0aGUgcGRldi0+ZG9tYWluX2xpc3QgaXMgbm90IGEgcG9pbnQgKCBpdCBpcyBh ICJzdHJ1Y3QgbGlzdF9oZWFkIGRvbWFpbl9saXN0IiB2YXJpYWJsZSksIHNvIGl0IGlzIHNhZmUg dG8KICAgZGVsZXRlIGl0IHVuZGVyIGxpc3RfZm9yX2VhY2hfZW50cnkgaW4gdGhpcyBjYXNlLiAK CiAgIEphbiwgaXMgaXQgc2ltaWxhciB0byB5b3Vycz8KClF1YW4KCl9fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVu LWRldmVsQGxpc3RzLnhlbi5vcmcKaHR0cDovL2xpc3RzLnhlbi5vcmcveGVuLWRldmVsCg==