From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chao Gao Subject: Re: [PATCH] xen: xen-pciback: Reset MSI-X state when exposing a device Date: Thu, 6 Dec 2018 10:18:17 +0800 Message-ID: <20181206021815.GA8252__22690.9210825854$1544062425$gmane$org@gao-cwp> References: <1543976357-1053-1-git-send-email-chao.gao@intel.com> <20181205093223.dncg4nq4dh6xmrhk@mac> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1gUjBd-0005in-Qj for xen-devel@lists.xenproject.org; Thu, 06 Dec 2018 02:14:45 +0000 Content-Disposition: inline In-Reply-To: <20181205093223.dncg4nq4dh6xmrhk@mac> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Roger Pau =?iso-8859-1?Q?Monn=E9?= Cc: Juergen Gross , Stefano Stabellini , linux-kernel@vger.kernel.org, Jia-Ju Bai , Jan Beulich , xen-devel@lists.xenproject.org, Boris Ostrovsky List-Id: xen-devel@lists.xenproject.org T24gV2VkLCBEZWMgMDUsIDIwMTggYXQgMTA6MzI6MjNBTSArMDEwMCwgUm9nZXIgUGF1IE1vbm7D qSB3cm90ZToKPk9uIFdlZCwgRGVjIDA1LCAyMDE4IGF0IDEwOjE5OjE3QU0gKzA4MDAsIENoYW8g R2FvIHdyb3RlOgo+PiBJIGZpbmQgc29tZSBwYXNzLXRocnUgZGV2aWNlcyBkb24ndCB3b3JrIGFu eSBtb3JlIGFjcm9zcyBndWVzdCByZWJvb3QuCj4+IEFzc2lnbmluZyBpdCB0byBhbm90aGVyIGd1 ZXN0IGFsc28gbWVldHMgdGhlIHNhbWUgaXNzdWUuIEFuZCB0aGUgb25seQo+PiB3YXkgdG8gbWFr ZSBpdCB3b3JrIGFnYWluIGlzIHVuLWJpbmRpbmcgYW5kIGJpbmRpbmcgaXQgdG8gcGNpYmFjay4K Pj4gU29tZW9uZSByZXBvcnRlZCB0aGlzIGlzc3VlIG9uZSB5ZWFyIGFnbyBbMV0uIE1vcmUgZGV0 YWlsIGFsc28gY2FuIGJlCj4+IGZvdW5kIGluIFsyXS4KPj4gCj4+IFRoZSByb290LWNhdXNlIGlz IFhlbidzIGludGVybmFsIE1TSS1YIHN0YXRlIGlzbid0IHJlc2V0IHByb3Blcmx5Cj4+IGR1cmlu ZyByZWJvb3Qgb3IgcmUtYXNzaWdubWVudC4gSW4gdGhlIGFib3ZlIGNhc2UsIFhlbiBzZXQgbWFz a2FsbCBiaXQKPj4gdG8gbWFzayBhbGwgTVNJIGludGVycnVwdHMgYWZ0ZXIgaXQgZGV0ZWN0ZWQg YSBwb3RlbnRpYWwgc2VjdXJpdHkKPj4gaXNzdWUuIEV2ZW4gYWZ0ZXIgZGV2aWNlIHJlc2V0LCBY ZW4gZGlkbid0IHJlc2V0IGl0cyBpbnRlcm5hbCBtYXNrYWxsCj4+IGJpdC4gQXMgYSByZXN1bHQs IG1hc2thbGwgYml0IHdvdWxkIGJlIHNldCBhZ2FpbiBpbiBuZXh0IHdyaXRlIHRvCj4+IE1TSS1Y IG1lc3NhZ2UgY29udHJvbCByZWdpc3Rlci4KPj4gCj4+IEdpdmVuIHRoYXQgUEhZU0RFVk9QU19w cmVwYXJlX21zaXgoKSBhbHNvIHRyaWdnZXJzIFhlbiByZXNldHRpbmcgTVNJLVgKPj4gaW50ZXJu YWwgc3RhdGUgb2YgYSBkZXZpY2UsIHdlIGVtcGxveSBpdCB0byBmaXggdGhpcyBpc3N1ZSByYXRo ZXIgdGhhbgo+PiBpbnRyb2R1Y2luZyBhbm90aGVyIGRlZGljYXRlZCBzdWItaHlwZXJjYWxsLgo+ PiAKPj4gTm90ZSB0aGF0IFBIWVNERVZPUFNfcmVsZWFzZV9tc2l4KCkgd2lsbCBmYWlsIGlmIHRo ZSBtYXBwaW5nIGJldHdlZW4KPj4gdGhlIGRldmljZSdzIG1zaXggYW5kIHBpcnEgaGFzIGJlZW4g Y3JlYXRlZC4gVGhpcyBsaW1pdGF0aW9uIHByZXZlbnRzCj4+IHVzIGNhbGxpbmcgdGhpcyBmdW5j dGlvbiB3aGVuIGRldGFjaGluZyBhIGRldmljZSBmcm9tIGEgZ3Vlc3QgZHVyaW5nCj4+IGd1ZXN0 IHNodXRkb3duLiBUaHVzIGl0IGlzIGNhbGxlZCByaWdodCBiZWZvcmUgY2FsbGluZwo+PiBQSFlT REVWT1BTX3ByZXBhcmVfbXNpeCgpLgo+Cj5zL1BIWVNERVZPUFMvUEhZU0RFVk9QLyAobm8gZmlu YWwgUykuIEFuZCB0aGVuIEkgd291bGQgYWxzbyBkcm9wIHRoZQo+KCkgYXQgdGhlIGVuZCBvZiB0 aGUgaHlwZXJjYWxsIG5hbWUgc2luY2UgaXQncyBub3QgYSBmdW5jdGlvbi4KCldpbGwgZG8uCgo+ Cj5JJ20gYWxzbyB3b25kZXJpbmcgd2h5IHRoZSByZWxlYXNlIGNhbid0IGJlIGRvbmUgd2hlbiB0 aGUgZGV2aWNlIGlzCj5kZXRhY2hlZCBmcm9tIHRoZSBndWVzdCAob3IgdGhlIGd1ZXN0IGhhcyBi ZWVuIHNodXQgZG93bikuIFRoaXMgbWFrZXMKPm1lIHdvcnJ5IGFib3V0IHRoZSByYWNpbmVzcyBv ZiB0aGUgYXR0YWNoL2RldGFjaCBwcm9jZWR1cmU6IGlmIHRoZXJlJ3MKPmEgc3RhdGUgd2hlcmUg cGNpYmFjayBhc3N1bWVzIHRoZSBkZXZpY2UgaGFzIGJlZW4gZGV0YWNoZWQgZnJvbSB0aGUKPmd1 ZXN0LCBidXQgdGhlcmUgYXJlIHN0aWxsIHBpcnFzIGJvdW5kLCBhbiBhdHRlbXB0IHRvIGF0dGFj aCB0bwo+YW5vdGhlciBndWVzdCBpbiBzdWNoIHN0YXRlIHdpbGwgZmFpbC4KCkkgdGhpbmsgeW91 ciBjb25jZXJuIGlzIHZhbGlkLiBUaGlzIGlzIHRoZSBleGFjdCBjYXNlIGluIHdoaWNoIFhlbiBz ZXRzCm1hc2thbGwgZmxhZy4gUWVtdSBkaWRuJ3QgZG8gbXNpeCBjbGVhbnVwIChpdCBjcmFzaGVk IG9yIGd1ZXN0IGRpZG4ndApyZXF1ZXN0IHFlbXUgdG8gZG8gdGhpcy4gQW55d2F5LCB3ZSBjb3Vs ZG4ndCByZWx5IG9uIHFlbXUpLCBsZWF2aW5nCnBpcnFzIGJvdW5kLiBwY2liYWNrIGRvZXNuJ3Qg bWFuYWdlIHBpcnFzIHNvIGl0IGRvZXNuJ3Qga25vdyBob3cgdG8gZG8KY2xlYW51cCBmb3IgbXNp eC4gVGhlbiBwY2liYWNrIGRvZXMgZGV2aWNlIHJlc2V0IGFuZCBkaXNhYmxlcwptZW1vcnkgZGVj b2RpbmcuIEFmdGVyIGRldGFjaGluZyBhIGRldmljZSBmcm9tIHRoZSBkb21haW4sIFhlbiBjYW4g ZG8KZnVydGhlciBjbGVhbnVwIGZvciBhIGNsb3NpbmcgVk0sIGluY2x1ZGluZyBmcmVlaW5nIHBp cnFzIG9mIHRoZSBWTSwgYnV0CnNhdyBtZW1vcnkgZGVjb2RpbmcgZGlzYWJsZWQuIEhlbmNlLCB0 aGUgbWFza2FsbCBmbGFnIGlzIHNldC4KCj4KPj4gWzFdOiBodHRwczovL2xpc3RzLnhlbnByb2pl Y3Qub3JnL2FyY2hpdmVzL2h0bWwveGVuLWRldmVsLzIwMTctMDkvCj4+ICAgICAgbXNnMDI1MjAu aHRtbAo+PiBbMl06IGh0dHBzOi8vbGlzdHMueGVuLm9yZy9hcmNoaXZlcy9odG1sL3hlbi1kZXZl bC8yMDE4LTExL21zZzAxNjE2Lmh0bWwKPj4gCj4+IFNpZ25lZC1vZmYtYnk6IENoYW8gR2FvIDxj aGFvLmdhb0BpbnRlbC5jb20+Cj4+IC0tLQo+PiAgZHJpdmVycy94ZW4veGVuLXBjaWJhY2svcGNp X3N0dWIuYyB8IDQ5ICsrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrCj4+ICBk cml2ZXJzL3hlbi94ZW4tcGNpYmFjay9wY2liYWNrLmggIHwgIDEgKwo+PiAgZHJpdmVycy94ZW4v eGVuLXBjaWJhY2sveGVuYnVzLmMgICB8IDEwICsrKysrKysrCj4+ICAzIGZpbGVzIGNoYW5nZWQs IDYwIGluc2VydGlvbnMoKykKPj4gCj4+IGRpZmYgLS1naXQgYS9kcml2ZXJzL3hlbi94ZW4tcGNp YmFjay9wY2lfc3R1Yi5jIGIvZHJpdmVycy94ZW4veGVuLXBjaWJhY2svcGNpX3N0dWIuYwo+PiBp bmRleCA1OTY2MWRiLi5mODYyM2QwIDEwMDY0NAo+PiAtLS0gYS9kcml2ZXJzL3hlbi94ZW4tcGNp YmFjay9wY2lfc3R1Yi5jCj4+ICsrKyBiL2RyaXZlcnMveGVuL3hlbi1wY2liYWNrL3BjaV9zdHVi LmMKPj4gQEAgLTg3LDYgKzg3LDU1IEBAIHN0YXRpYyBzdHJ1Y3QgcGNpc3R1Yl9kZXZpY2UgKnBj aXN0dWJfZGV2aWNlX2FsbG9jKHN0cnVjdCBwY2lfZGV2ICpkZXYpCj4+ICAJcmV0dXJuIHBzZGV2 Owo+PiAgfQo+PiAgCj4+ICsvKgo+PiArICogUmVzZXQgWGVuIGludGVybmFsIE1TSS1YIHN0YXRl IGJ5IGludm9raW5nIFBIWVNERVZPUF97cmVsZWFzZSwgcHJlcGFyZX1fbXNpeC4KPj4gKyAqLwo+ PiAraW50IHBjaXN0dWJfbXNpeF9yZXNldChzdHJ1Y3QgcGNpX2RldiAqZGV2KQo+PiArewo+PiAr I2lmZGVmIENPTkZJR19QQ0lfTVNJCj4+ICsJaWYgKGRldi0+bXNpeF9jYXApIHsKPj4gKwkJc3Ry dWN0IHBoeXNkZXZfcGNpX2RldmljZSBwcGRldiA9IHsKPj4gKwkJCS5zZWcgPSBwY2lfZG9tYWlu X25yKGRldi0+YnVzKSwKPj4gKwkJCS5idXMgPSBkZXYtPmJ1cy0+bnVtYmVyLAo+PiArCQkJLmRl dmZuID0gZGV2LT5kZXZmbgo+PiArCQl9Owo+PiArCQlpbnQgZXJyOwo+PiArCQl1MTYgdmFsOwo+ PiArCj4+ICsJCS8qCj4+ICsJCSAqIERvIGEgd3JpdGUgZmlyc3QgdG8gZmx1c2ggWGVuJ3MgaW50 ZXJuYWwgc3RhdGUgdG8gaGFyZHdhcmUKPj4gKwkJICogc3VjaCB0aGF0IHRoZSBmb2xsb3dpbmcg cmVhZCBjYW4gaW5mZXIgd2hldGhlciBNU0ktWCBtYXNrYWxsCj4+ICsJCSAqIGJpdCBpcyBzZXQg YnkgWGVuLgo+PiArCQkgKi8KPj4gKwkJcGNpX3JlYWRfY29uZmlnX3dvcmQoZGV2LCBkZXYtPm1z aXhfY2FwICsgUENJX01TSVhfRkxBR1MsICZ2YWwpOwo+PiArCQlwY2lfd3JpdGVfY29uZmlnX3dv cmQoZGV2LCBkZXYtPm1zaXhfY2FwICsgUENJX01TSVhfRkxBR1MsIHZhbCk7Cj4+ICsKPj4gKwkJ cGNpX3JlYWRfY29uZmlnX3dvcmQoZGV2LCBkZXYtPm1zaXhfY2FwICsgUENJX01TSVhfRkxBR1Ms ICZ2YWwpOwo+PiArCQlpZiAoISh2YWwgJiBQQ0lfTVNJWF9GTEFHU19NQVNLQUxMKSkKPj4gKwkJ CXJldHVybiAwOwo+Cj5JIHdvdWxkIGp1c3QgcGVyZm9ybSBhIHJlc2V0IHJlZ2FyZGxlc3Mgb2Yg dGhlIG1hc2thbGwgdmFsdWUsIHdoaWNoCj53b3VsZCBhbHNvIGFsbG93IHlvdSB0byBza2lwIHRo ZSByZWFkL3dyaXRlIGRhbmNlIHRoYXQgeW91IGRvIGFib3ZlLgo+Cj5BVE0gd2UgYXJlIG9ubHkg Y29uY2VybmVkIGFib3V0IHRoZSBtYXNrYWxsIGJpdCwgYnV0IHRoZXJlJ3Mgbm8gcmVhc29uCj53 aHkgcHJlcGFyZS9yZWxlYXNlIGNvdWxkbid0IGRvIG1vcmUgc3R1ZmYgaW4gdGhlIGZ1dHVyZS4K Pgo+PiArCj4+ICsJCXByX2luZm8oIlJlc2V0IE1TSS1YIHN0YXRlIGZvciBkZXZpY2UgJTA0eDol MDJ4OiUwMnguJWRcbiIsCj4+ICsJCQlwcGRldi5zZWcsIHBwZGV2LmJ1cywgUENJX1NMT1QocHBk ZXYuZGV2Zm4pLAo+PiArCQkJUENJX0ZVTkMocHBkZXYuZGV2Zm4pKTsKPj4gKwo+PiArCQllcnIg PSBIWVBFUlZJU09SX3BoeXNkZXZfb3AoUEhZU0RFVk9QX3JlbGVhc2VfbXNpeCwgJnBwZGV2KTsK Pj4gKwkJaWYgKGVycikgewo+PiArCQkJZGV2X3dhcm4oJmRldi0+ZGV2LCAiTVNJLVggcmVsZWFz ZSBmYWlsZWQgKCVkKVxuIiwKPj4gKwkJCQkgZXJyKTsKPgo+VGhpcyBpcyBhIHdhcm4sIHdoaWxl IHRoZSBtZXNzYWdlIGJlbG93IGlzIGFuIGVyciwgYW55IHJlYXNvbiBmb3IKPnRoZSBkaWZmZXJl bmNlIGluIGxvZyBsZXZlbD8KPgoKV2lsbCBmaXggdGhpcy4gSSBqdXN0IGNvcHkgY29kZSBzbmlw cHRlIGZyb20gdGhlIGV4aXN0aW5nIGNhbGwgc2l0ZS4KYW5kIGFsc28gbWFrZSB0aGVtIGRpc3Rp bmd1aXNoYWJsZSBwZXIgSmFuJ3Mgc3VnZ2VzdGlvbi4KClRoYW5rcwpDaGFvCgpfX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpYZW4tZGV2ZWwgbWFpbGluZyBs aXN0Clhlbi1kZXZlbEBsaXN0cy54ZW5wcm9qZWN0Lm9yZwpodHRwczovL2xpc3RzLnhlbnByb2pl Y3Qub3JnL21haWxtYW4vbGlzdGluZm8veGVuLWRldmVs