From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jan Beulich" Subject: Re: [PATCH] xen: xen-pciback: Reset MSI-X state when exposing a device Date: Thu, 13 Dec 2018 00:54:52 -0700 Message-ID: <5C12104C0200007800205B4B__33160.3981824175$1544687620$gmane$org@prv1-mh.provo.novell.com> References: <1543976357-1053-1-git-send-email-chao.gao@intel.com> <20181205093223.dncg4nq4dh6xmrhk@mac> <20181212070654.GA13411@gao-cwp> <5C10CBF50200007800205596@prv1-mh.provo.novell.com> <20181212151824.GA17227@gao-cwp> <5C112783020000780020589C@prv1-mh.provo.novell.com> <20181213034657.GA26926@gao-cwp> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1gXLpg-00084C-Mb for xen-devel@lists.xenproject.org; Thu, 13 Dec 2018 07:54:56 +0000 In-Reply-To: <20181213034657.GA26926@gao-cwp> Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Chao Gao Cc: Juergen Gross , Stefano Stabellini , linux-kernel@vger.kernel.org, Jia-Ju Bai , xen-devel , Boris Ostrovsky , Roger Pau Monne List-Id: xen-devel@lists.xenproject.org Pj4+IE9uIDEzLjEyLjE4IGF0IDA0OjQ2LCA8Y2hhby5nYW9AaW50ZWwuY29tPiB3cm90ZToKPiBP biBXZWQsIERlYyAxMiwgMjAxOCBhdCAwODoyMTozOUFNIC0wNzAwLCBKYW4gQmV1bGljaCB3cm90 ZToKPj4+Pj4gT24gMTIuMTIuMTggYXQgMTY6MTgsIDxjaGFvLmdhb0BpbnRlbC5jb20+IHdyb3Rl Ogo+Pj4gT24gV2VkLCBEZWMgMTIsIDIwMTggYXQgMDE6NTE6MDFBTSAtMDcwMCwgSmFuIEJldWxp Y2ggd3JvdGU6Cj4+Pj4+Pj4gT24gMTIuMTIuMTggYXQgMDg6MDYsIDxjaGFvLmdhb0BpbnRlbC5j b20+IHdyb3RlOgo+Pj4+PiBPbiBXZWQsIERlYyAwNSwgMjAxOCBhdCAwOTowMTozM0FNIC0wNTAw LCBCb3JpcyBPc3Ryb3Zza3kgd3JvdGU6Cj4+Pj4+Pk9uIDEyLzUvMTggNDozMiBBTSwgUm9nZXIg UGF1IE1vbm7DqSB3cm90ZToKPj4+Pj4+PiBPbiBXZWQsIERlYyAwNSwgMjAxOCBhdCAxMDoxOTox N0FNICswODAwLCBDaGFvIEdhbyB3cm90ZToKPj4+Pj4+Pj4gSSBmaW5kIHNvbWUgcGFzcy10aHJ1 IGRldmljZXMgZG9uJ3Qgd29yayBhbnkgbW9yZSBhY3Jvc3MgZ3Vlc3QgcmVib290Lgo+Pj4+Pj4+ PiBBc3NpZ25pbmcgaXQgdG8gYW5vdGhlciBndWVzdCBhbHNvIG1lZXRzIHRoZSBzYW1lIGlzc3Vl LiBBbmQgdGhlIG9ubHkKPj4+Pj4+Pj4gd2F5IHRvIG1ha2UgaXQgd29yayBhZ2FpbiBpcyB1bi1i aW5kaW5nIGFuZCBiaW5kaW5nIGl0IHRvIHBjaWJhY2suCj4+Pj4+Pj4+IFNvbWVvbmUgcmVwb3J0 ZWQgdGhpcyBpc3N1ZSBvbmUgeWVhciBhZ28gWzFdLiBNb3JlIGRldGFpbCBhbHNvIGNhbiBiZQo+ Pj4+Pj4+PiBmb3VuZCBpbiBbMl0uCj4+Pj4+Pj4+Cj4+Pj4+Pj4+IFRoZSByb290LWNhdXNlIGlz IFhlbidzIGludGVybmFsIE1TSS1YIHN0YXRlIGlzbid0IHJlc2V0IHByb3Blcmx5Cj4+Pj4+Pj4+ IGR1cmluZyByZWJvb3Qgb3IgcmUtYXNzaWdubWVudC4gSW4gdGhlIGFib3ZlIGNhc2UsIFhlbiBz ZXQgbWFza2FsbCBiaXQKPj4+Pj4+Pj4gdG8gbWFzayBhbGwgTVNJIGludGVycnVwdHMgYWZ0ZXIg aXQgZGV0ZWN0ZWQgYSBwb3RlbnRpYWwgc2VjdXJpdHkKPj4+Pj4+Pj4gaXNzdWUuIEV2ZW4gYWZ0 ZXIgZGV2aWNlIHJlc2V0LCBYZW4gZGlkbid0IHJlc2V0IGl0cyBpbnRlcm5hbCBtYXNrYWxsCj4+ Pj4+Pj4+IGJpdC4gQXMgYSByZXN1bHQsIG1hc2thbGwgYml0IHdvdWxkIGJlIHNldCBhZ2FpbiBp biBuZXh0IHdyaXRlIHRvCj4+Pj4+Pj4+IE1TSS1YIG1lc3NhZ2UgY29udHJvbCByZWdpc3Rlci4K Pj4+Pj4+Pj4KPj4+Pj4+Pj4gR2l2ZW4gdGhhdCBQSFlTREVWT1BTX3ByZXBhcmVfbXNpeCgpIGFs c28gdHJpZ2dlcnMgWGVuIHJlc2V0dGluZyBNU0ktWAo+Pj4+Pj4+PiBpbnRlcm5hbCBzdGF0ZSBv ZiBhIGRldmljZSwgd2UgZW1wbG95IGl0IHRvIGZpeCB0aGlzIGlzc3VlIHJhdGhlciB0aGFuCj4+ Pj4+Pj4+IGludHJvZHVjaW5nIGFub3RoZXIgZGVkaWNhdGVkIHN1Yi1oeXBlcmNhbGwuCj4+Pj4+ Pj4+Cj4+Pj4+Pj4+IE5vdGUgdGhhdCBQSFlTREVWT1BTX3JlbGVhc2VfbXNpeCgpIHdpbGwgZmFp bCBpZiB0aGUgbWFwcGluZyBiZXR3ZWVuCj4+Pj4+Pj4+IHRoZSBkZXZpY2UncyBtc2l4IGFuZCBw aXJxIGhhcyBiZWVuIGNyZWF0ZWQuIFRoaXMgbGltaXRhdGlvbiBwcmV2ZW50cwo+Pj4+Pj4+PiB1 cyBjYWxsaW5nIHRoaXMgZnVuY3Rpb24gd2hlbiBkZXRhY2hpbmcgYSBkZXZpY2UgZnJvbSBhIGd1 ZXN0IGR1cmluZwo+Pj4+Pj4+PiBndWVzdCBzaHV0ZG93bi4gVGh1cyBpdCBpcyBjYWxsZWQgcmln aHQgYmVmb3JlIGNhbGxpbmcKPj4+Pj4+Pj4gUEhZU0RFVk9QU19wcmVwYXJlX21zaXgoKS4KPj4+ Pj4+PiBzL1BIWVNERVZPUFMvUEhZU0RFVk9QLyAobm8gZmluYWwgUykuIEFuZCB0aGVuIEkgd291 bGQgYWxzbyBkcm9wIHRoZQo+Pj4+Pj4+ICgpIGF0IHRoZSBlbmQgb2YgdGhlIGh5cGVyY2FsbCBu YW1lIHNpbmNlIGl0J3Mgbm90IGEgZnVuY3Rpb24uCj4+Pj4+Pj4KPj4+Pj4+PiBJJ20gYWxzbyB3 b25kZXJpbmcgd2h5IHRoZSByZWxlYXNlIGNhbid0IGJlIGRvbmUgd2hlbiB0aGUgZGV2aWNlIGlz Cj4+Pj4+Pj4gZGV0YWNoZWQgZnJvbSB0aGUgZ3Vlc3QgKG9yIHRoZSBndWVzdCBoYXMgYmVlbiBz aHV0IGRvd24pLiBUaGlzIG1ha2VzCj4+Pj4+Pj4gbWUgd29ycnkgYWJvdXQgdGhlIHJhY2luZXNz IG9mIHRoZSBhdHRhY2gvZGV0YWNoIHByb2NlZHVyZTogaWYgdGhlcmUncwo+Pj4+Pj4+IGEgc3Rh dGUgd2hlcmUgcGNpYmFjayBhc3N1bWVzIHRoZSBkZXZpY2UgaGFzIGJlZW4gZGV0YWNoZWQgZnJv bSB0aGUKPj4+Pj4+PiBndWVzdCwgYnV0IHRoZXJlIGFyZSBzdGlsbCBwaXJxcyBib3VuZCwgYW4g YXR0ZW1wdCB0byBhdHRhY2ggdG8KPj4+Pj4+PiBhbm90aGVyIGd1ZXN0IGluIHN1Y2ggc3RhdGUg d2lsbCBmYWlsLgo+Pj4+Pj4KPj4+Pj4+SSB3b25kZXIgd2hldGhlciB0aGlzIGFkZGl0aW9uYWwg cmVzZXQgZnVuY3Rpb25hbGl0eSBjb3VsZCBiZSBkb25lIG91dAo+Pj4+Pj5vZiB4ZW5fcGNpYmtf eGVuYnVzX3JlbW92ZSgpLiBXZSBmaXJzdCBkbyBhIChiZXN0IGVmZm9ydCkgZGV2aWNlIHJlc2V0 Cj4+Pj4+PmFuZCB0aGVuIGRvIHRoZSBleHRyYSB0aGluZ3MgdGhhdCBhcmUgbm90IHByb3Blcmx5 IGRvbmUgdGhlcmUuCj4+Pj4+IAo+Pj4+PiBOby4gSXQgY2Fubm90IGJlIGRvbmUgaW4geGVuX3Bj aWJrX3hlbmJ1c19yZW1vdmUoKSB3aXRob3V0IG1vZGlmeWluZwo+Pj4+PiB0aGUgaGFuZGxlciBv ZiBQSFlTREVWT1BfcmVsZWFzZV9tc2l4LiBUbyBkbyBhIHN1Y2Nlc3NmdWwgWGVuIGludGVybmFs Cj4+Pj4+IE1TSS1YIHN0YXRlIHJlc2V0LCBQSFlTREVWT1Bfe3JlbGVhc2UsIHByZXBhcmV9X21z aXggc2hvdWxkIGJlIGZpbmlzaGVkCj4+Pj4+IHdpdGhvdXQgZXJyb3IuIEJ1dCBBVE0sIHhlbiBl eHBlY3RzIHRoYXQgbm8gbXNpIGlzIGJvdW5kIHRvIHBpcnEgd2hlbgo+Pj4+PiBkb2luZyBQSFlT REVWT1BfcmVsZWFzZV9tc2l4LiBPdGhlcndpc2UgaXQgZmFpbHMgd2l0aCBlcnJvciBjb2RlIC1F QlVTWS4KPj4+Pj4gSG93ZXZlciwgdGhlIGV4cGVjdGF0aW9uIGlzbid0IGd1YXJhbnRlZWQgaW4g eGVuX3BjaWJrX3hlbmJ1c19yZW1vdmUoKS4KPj4+Pj4gSW4gc29tZSBjYXNlcywgaWYgcWVtdSBm YWlscyB0byB1bm1hcCBNU0lzLCBNU0lzIGFyZSB1bm1hcHBlZCBieSBYZW4KPj4+Pj4gYXQgbGFz dCBtaW51dGUsIHdoaWNoIGhhcHBlbnMgYWZ0ZXIgZGV2aWNlIHJlc2V0IGluIAo+Pj4+PiB4ZW5f cGNpYmtfeGVuYnVzX3JlbW92ZSgpLgo+Pj4+Cj4+Pj5CdXQgdGhhdCBtYXkgbmVlZCB0YWtpbmcg Y2FyZSBvZjogSSBkb24ndCB0aGluayBpdCBpcyBhIGdvb2QgaWRlYSB0byBoYXZlCj4+Pj5hbnl0 aGluZyBsZWZ0IGZyb20gdGhlIHByaW9yIG93bmluZyBkb21haW4gd2hlbiB0aGUgZGV2aWNlIGdl dHMgcmVzZXQuCj4+Pj5JLmUuIGxlZnQgb3ZlciBJUlEgYmluZGluZ3Mgc2hvdWxkIHBlcmhhcHMg YmUgZm9yY2libHkgY2xlYXJlZCBiZWZvcmUKPj4+Pmludm9raW5nIHRoZSByZXNldDsKPj4+IAo+ Pj4gQWdyZWUuIEhvdyBhYm91dCBwY2liYWNrIHRvIHRyYWNrIHRoZSBlc3RhYmxpc2hlZCBJUlEg YmluZGluZ3M/IFRoZW4KPj4+IHBjaWJhY2sgY2FuIGNsZWFyIGlycSBiaW5kaW5nIGJlZm9yZSBp bnZva2luZyB0aGUgcmVzZXQuCj4+Cj4+SG93IHdvdWxkIHBjaWJhY2sgZXZlbiBrbm93IG9mIHRo b3NlIG1hcHBpbmdzLCB3aGVuIGl0J3MgcWVtdQo+PndobyBlc3RhYmxpc2hlcyAoYW5kIG1hbmFn ZXMpIHRoZW0/Cj4gCj4gSSBtZWFudCB0byBleHBvc2Ugc29tZSBpbnRlcmZhY2VzIGZyb20gcGNp YmFjay4gQW5kIHBjaWJhY2sgc2VydmVzCj4gYXMgdGhlIHByb3h5IG9mIElSUSAodW4pYmluZGlu ZyBBUElzLgoKSWYgYXQgYWxsIHBvc3NpYmxlIHdlIHNob3VsZCBhdm9pZCBoYXZpbmcgdG8gY2hh bmdlIG1vcmUgcGFydGllcyAocWVtdSwKbGlieGMsIGtlcm5lbCwgaHlwZXJ2aXNvcikgdGhhbiBy ZWFsbHkgbmVjZXNzYXJ5LiBSZW1lbWJlciB0aGF0IHN1Y2gKYSBidWcgZml4IG1heSB3YW50IGJh Y2twb3J0aW5nLCBhbmQgbWFraW5nIHN1cmUgYWZmZWN0ZWQgcGVvcGxlIGhhdmUKYWxsIHJlbGV2 YW50IGNvbXBvbmVudHMgdXBkYXRlZCBpcyBpbmNyZWFzaW5nbHkgZGlmZmljdWx0IHdpdGggdGhl aXIKbnVtYmVyIGdyb3dpbmcuCgo+Pj4+aW4gZmFjdCBJJ2QgZXhwZWN0IHRoaXMgdG8gaGFwcGVu IGluIHRoZSBjb3Vyc2Ugb2YKPj4+PmRvbWFpbiBkZXN0cnVjdGlvbiwgYW5kIEknZCBleHBlY3Qg dGhlIGRldmljZSByZXNldCB0byBjb21lIGFmdGVyIHRoZQo+Pj4+ZG9tYWluIHdhcyBjbGVhbmVk IHVwLiBQZXJoYXBzIHNpbXBseSBhbiBvcmRlcmluZyBpc3N1ZSBpbiB0aGUgdG9vbAo+Pj4+c3Rh Y2s/Cj4+PiAKPj4+IEkgZG9uJ3QgdGhpbmsgcmV2ZXJzaW5nIHRoZSBzZXF1ZW5jZXMgb2YgZGV2 aWNlIHJlc2V0IGFuZCBkb21haW4KPj4+IGRlc3RydWN0aW9uIHdvdWxkIGJlIHNpbXBsZS4gRnVy dGhlcm1vcmUsIGR1cmluZyBkZXZpY2UgaG90LXVucGx1ZywKPj4+IGRldmljZSByZXNldCBpcyBk b25lIHdoZW4gdGhlIG93bmVyIGlzIGFsaXZlLiBTbyBpZiB3ZSB1c2UgZG9tYWluCj4+PiBkZXN0 cnVjdGlvbiB0byBlbmZvcmNlIGFsbCBpcnEgYmluZGluZyBjbGVhcmVkLCBpbiB0aGVvcnksIGl0 IHdvbid0IGJlCj4+PiBhcHBsaWNhYmxlIHRvIGhvdC11bnBsdWcgY2FzZSAoaWYgcWVtdSdzIGhv dC11bnBsdWcgbG9naWMgaXMKPj4+IGNvbXByb21pc2VkKS4KPj4KPj5FdmVuIGluIHRoZSBob3Qt dW5wbHVnIGNhc2UgdGhlIHRvb2wgc3RhY2sgY291bGQgaXNzdWUgdW5iaW5kCj4+cmVxdWVzdHMs IGJlaGluZCB0aGUgYmFjayBvZiB0aGUgcG9zc2libHkgY29tcHJvbWlzZWQgcWVtdSwKPj5vbmNl IG5laXRoZXIgdGhlIGd1ZXN0IG5vciBxZW11IGhhdmUgYWNjZXNzIHRvIHRoZSBkZXZpY2UKPj5h bnltb3JlLgo+IAo+IEJ1dCBjdXJyZW50bHksIHRvb2wgc3RhY2sgZG9lc24ndCBrbm93IHRoZSBy ZW1haW5pbmcgSVJRIGJpbmRpbmdzLgo+IElmIHRvb2wgc3RhY2sgY2FuIG1haW50YWluZSBJUlEg YmluZGluZyBpbmZvcm1hdGlvbiBvZiBhIHBhc3MtdGhydQo+IGRldmljZSAoc3RvcmVkIGluIFhl bnN0b3JlPyksIHdlIGNhbiBjb21lIHVwIHdpdGggYSBjbGVhbiBzb2x1dGlvbgo+IHdpdGhvdXQg bW9kaWZ5aW5nIGxpbnV4IGtlcm5lbCBhbmQgWGVuLgoKSWYgdGhlcmUncyBubyB3YXkgZm9yIHRo ZSB0b29sIHN0YWNrIHRvIGVpdGhlciBmaW5kIG91dCB0aGUgYmluZGluZ3MKb3IgImJsaW5kbHki IGlzc3VlIHVuYmluZCByZXF1ZXN0cyAoYWNjZXB0aW5nIHRoZW0gdG8gZmFpbCksIHRoZW4gYQoi d2lsZGNhcmQiIHVuYmluZCBvcGVyYXRpb24gbWF5IHdhbnQgYWRkaW5nLiBPciwgcGVyaGFwcyBl dmVuCmJldHRlciwgWEVOX0RPTUNUTF9kZWFzc2lnbl9kZXZpY2UgY291bGQgdW5iaW5kIGFueXRo aW5nIGxlZnQKaW4gcGxhY2UgZm9yIHRoZSBzcGVjaWZpZWQgZGV2aWNlLiBJIGFjdHVhbGx5IHdv bmRlciB3aHkgdGhhdCdzIG5vdAphbHJlYWR5IHRoZSBjYXNlLgoKSmFuCgoKX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlz dApYZW4tZGV2ZWxAbGlzdHMueGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0 Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL3hlbi1kZXZlbA==