From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julien Grall Subject: Re: xen/evtchn and forced threaded irq Date: Wed, 20 Feb 2019 20:46:33 +0000 Message-ID: <5df8888a-4a29-fccd-bac2-a9c170244029__27217.5987645582$1550696656$gmane$org@arm.com> References: <5e256d9a-572c-e01e-7706-407f99245b00@arm.com> <20190220000209.GA4091@localhost.localdomain> <21214d47-9c68-e6bf-007a-4047cc2b02f9@oracle.com> <8f7445d7-fa50-f3e9-44f5-cc2aebd020f4@arm.com> <15bc52cb-82d8-4d2c-e5a8-c6ae8de90276@oracle.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" 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 1gwZ1M-00012g-VA for xen-devel@lists.xenproject.org; Wed, 20 Feb 2019 21:03:12 +0000 In-Reply-To: <15bc52cb-82d8-4d2c-e5a8-c6ae8de90276@oracle.com> Content-Language: en-US List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Boris Ostrovsky Cc: Juergen Gross , Stefano Stabellini , Andrew Cooper , "linux-kernel@vger.kernel.org" , Jan Beulich , xen-devel , Dave P Martin List-Id: xen-devel@lists.xenproject.org KCsgQW5kcmV3IGFuZCBKYW4gZm9yIGZlZWRiYWNrIG9uIHRoZSBldmVudCBjaGFubmVsIGludGVy cnVwdCkKCkhpIEJvcmlzLAoKVGhhbmsgeW91IGZvciB0aGUgeW91ciBmZWVkYmFjay4KCk9uIDIv MjAvMTkgODowNCBQTSwgQm9yaXMgT3N0cm92c2t5IHdyb3RlOgo+IE9uIDIvMjAvMTkgMTowNSBQ TSwgSnVsaWVuIEdyYWxsIHdyb3RlOgo+PiBIaSwKPj4KPj4gT24gMjAvMDIvMjAxOSAxNzowNywg Qm9yaXMgT3N0cm92c2t5IHdyb3RlOgo+Pj4gT24gMi8yMC8xOSA5OjE1IEFNLCBKdWxpZW4gR3Jh bGwgd3JvdGU6Cj4+Pj4gSGkgQm9yaXMsCj4+Pj4KPj4+PiBUaGFuayB5b3UgZm9yIHlvdXIgYW5z d2VyLgo+Pj4+Cj4+Pj4gT24gMjAvMDIvMjAxOSAwMDowMiwgQm9yaXMgT3N0cm92c2t5IHdyb3Rl Ogo+Pj4+PiBPbiBUdWUsIEZlYiAxOSwgMjAxOSBhdCAwNTozMToxMFBNICswMDAwLCBKdWxpZW4g R3JhbGwgd3JvdGU6Cj4+Pj4+PiBIaSBhbGwsCj4+Pj4+Pgo+Pj4+Pj4gSSBoYXZlIGJlZW4gbG9v a2luZyBhdCB1c2luZyBMaW51eCBSVCBpbiBEb20wLiBPbmNlIHRoZSBndWVzdCBpcwo+Pj4+Pj4g c3RhcnRlZCwKPj4+Pj4+IHRoZSBjb25zb2xlIGlzIGVuZGluZyB0byBoYXZlIGEgbG90IG9mIHdh cm5pbmcgKHNlZSB0cmFjZSBiZWxvdykuCj4+Pj4+Pgo+Pj4+Pj4gQWZ0ZXIgc29tZSBpbnZlc3Rp Z2F0aW9uLCB0aGlzIGlzIGJlY2F1c2UgdGhlIGlycSBoYW5kbGVyIHdpbGwgbm93Cj4+Pj4+PiBi ZSB0aHJlYWRlZC4KPj4+Pj4+IEkgY2FuIHJlcHJvZHVjZSB0aGUgc2FtZSBlcnJvciB3aXRoIHRo ZSB2YW5pbGxhIExpbnV4IHdoZW4gcGFzc2luZwo+Pj4+Pj4gdGhlIG9wdGlvbgo+Pj4+Pj4gJ3Ro cmVhZGlycXMnIG9uIHRoZSBjb21tYW5kIGxpbmUgKHRoZSB0cmFjZSBiZWxvdyBpcyBmcm9tIDUu MC4wLXJjNwo+Pj4+Pj4gdGhhdCBoYXMKPj4+Pj4+IG5vdCBSVCBzdXBwb3J0KS4KPj4+Pj4+Cj4+ Pj4+PiBGV0lXLCB0aGUgaW50ZXJydXB0IGZvciBwb3J0IDYgaXMgdXNlZCB0byBmb3IgdGhlIGd1 ZXN0IHRvCj4+Pj4+PiBjb21tdW5pY2F0ZSB3aXRoCj4+Pj4+PiB4ZW5zdG9yZS4KPj4+Pj4+Cj4+ Pj4+PiAgwqDCoEZyb20gbXkgdW5kZXJzdGFuZGluZywgdGhpcyBpcyBoYXBwZW5pbmcgYmVjYXVz ZSB0aGUgaW50ZXJydXB0Cj4+Pj4+PiBoYW5kbGVyIGlzIG5vdwo+Pj4+Pj4gcnVuIGluIGEgdGhy ZWFkLiBTbyB3ZSBjYW4gaGF2ZSB0aGUgZm9sbG93aW5nIGhhcHBlbmluZy4KPj4+Pj4+Cj4+Pj4+ PiAgwqDCoMKgwqAgSW50ZXJydXB0IGNvbnRleHTCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIHzCoMKg wqDCoCBJbnRlcnJ1cHQgdGhyZWFkCj4+Pj4+PiAgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIHwKPj4+Pj4+ICDCoMKgwqDC oCByZWNlaXZlIGludGVycnVwdCBwb3J0IDbCoMKgwqDCoCB8Cj4+Pj4+PiAgwqDCoMKgwqAgY2xl YXIgdGhlIGV2dGNobiBwb3J0wqDCoMKgwqDCoMKgwqAgfAo+Pj4+Pj4gIMKgwqDCoMKgIHNldCBJ UlFGX1JVTlRIUkVBRMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgfAo+Pj4+Pj4gIMKgwqDCoMKgIGtp Y2sgaW50ZXJydXB0IHRocmVhZMKgwqDCoMKgwqDCoMKgIHwKPj4+Pj4+ICDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgfMKg wqDCoCBjbGVhciBJUlFGX1JVTlRIUkVBRAo+Pj4+Pj4gIMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCB8wqDCoMKgIGNhbGwg ZXZ0Y2huX2ludGVycnVwdAo+Pj4+Pj4gIMKgwqDCoMKgIHJlY2VpdmUgaW50ZXJydXB0IHBvcnQg NsKgwqDCoMKgIHwKPj4+Pj4+ICDCoMKgwqDCoCBjbGVhciB0aGUgZXZ0Y2huIHBvcnTCoMKgwqDC oMKgwqDCoCB8Cj4+Pj4+PiAgwqDCoMKgwqAgc2V0IElSUUZfUlVOVEhSRUFEwqDCoMKgwqDCoMKg wqDCoMKgwqAgfAo+Pj4+Pj4gIMKgwqDCoMKgIGtpY2sgaW50ZXJydXB0IHRocmVhZMKgwqDCoMKg wqDCoMKgIHwKPj4+Pj4+ICDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgfMKgwqDCoCBkaXNhYmxlIGludGVycnVwdCBwb3J0 IDYKPj4+Pj4+ICDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgwqAgfMKgwqDCoCBldnRjaG4tPmVuYWJsZWQgPSBmYWxzZQo+Pj4+ Pj4gIMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoCB8wqDCoMKgIFsuLi4uXQo+Pj4+Pj4gIMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCB8Cj4+Pj4+PiAg wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgIHzCoMKgwqAgKioqIEhhbmRsaW5nIHRoZSBzZWNvbmQKPj4+Pj4+IGludGVycnVw dCAqKioKPj4+Pj4+ICDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgfMKgwqDCoCBjbGVhciBJUlFGX1JVTlRIUkVBRAo+Pj4+ Pj4gIMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoCB8wqDCoMKgIGNhbGwgZXZ0Y2huX2ludGVycnVwdAo+Pj4+Pj4gIMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoCB8wqDCoMKgIFdBUk4oLi4uKQo+Pj4+Pj4KPj4+Pj4+IEkgYW0gbm90IGVudGlyZWx5IHN1 cmUgaG93IHRvIGZpeCB0aGlzLiBJIGhhdmUgdHdvIHNvbHV0aW9ucyBpbiBtaW5kOgo+Pj4+Pj4K Pj4+Pj4+IDEpIFByZXZlbnQgdGhlIGludGVycnVwdCBoYW5kbGVyIHRvIGJlIHRocmVhZGVkLiBX ZSB3b3VsZCBhbHNvCj4+Pj4+PiBuZWVkIHRvCj4+Pj4+PiBzd2l0Y2ggZnJvbSBzcGluX2xvY2sg dG8gcmF3X3NwaW5fbG9jayBhcyB0aGUgZm9ybWVyIG1heSBzbGVlcCBvbgo+Pj4+Pj4gUlQtTGlu dXguCj4+Pj4+Pgo+Pj4+Pj4gMikgUmVtb3ZlIHRoZSB3YXJuaW5nCj4+Pj4+Cj4+Pj4+IEkgdGhp bmsgYWNjZXNzIHRvIGV2dGNobi0+ZW5hYmxlZCBpcyByYWN5IHNvICh3aXRoIG9yIHdpdGhvdXQg dGhlCj4+Pj4+IHdhcm5pbmcpIHdlIGNhbid0IHVzZSBpdCByZWxpYWJseS4KPj4+Pgo+Pj4+IFRo aW5raW5nIGFib3V0IGl0LCBpdCB3b3VsZCBub3QgYmUgdGhlIG9ubHkgaXNzdWUuIFRoZSByaW5n IGlzIHNpemVkCj4+Pj4gdG8gY29udGFpbiBvbmx5IG9uZSBpbnN0YW5jZSBvZiB0aGUgc2FtZSBl dmVudC4gU28gaWYgeW91IHJlY2VpdmUKPj4+PiB0d2ljZSB0aGUgZXZlbnQsIHlvdSBtYXkgb3Zl cmZsb3cgdGhlIHJpbmcuCj4+Pgo+Pj4gSG0uLi4gVGhhdCdzIGFub3RoZXIgYXJndW1lbnQgaW4g ZmF2b3Igb2YgInVudGhyZWFkaW5nIiB0aGUgaGFuZGxlci4KPj4KPj4gSSBmaXJzdCB0aG91Z2h0 IGl0IHdvdWxkIGJlIHBvc3NpYmxlIHRvIHVudGhyZWFkIGl0LiBIb3dldmVyLAo+PiB3YWtlX3Vw X2ludGVycnVwdGlibGUgaXMgdXNpbmcgYSBzcGluX2xvY2suIE9uIFJUIHNwaW5fbG9jayBjYW4g c2xlZXAsCj4+IHNvIHRoaXMgY2Fubm90IGJlIHVzZWQgaW4gYW4gaW50ZXJydXB0IGNvbnRleHQu Cj4+Cj4+IFNvIEkgdGhpbmsgInVudGhyZWFkaW5nIiB0aGUgaGFuZGxlciBpcyBub3QgYW4gb3B0 aW9uIGhlcmUuCj4gCj4gVGhhdCBzb3VuZHMgbGlrZSBhIGRpZmZlcmVudCBwcm9ibGVtLiBJLmUu IHRoZXJlIGFyZSB0d28gaXNzdWVzOgo+ICogdGhyZWFkZWQgaW50ZXJydXB0cyBkb24ndCB3b3Jr IHByb3Blcmx5IChyYWNlcywgcmluZyBvdmVyZmxvdykKPiAqIGV2dGNobl9pbnRlcnJ1cHQoKSAo dGhyZWFkZWQgb3Igbm90KSBoYXMgc3Bpbl9sb2NrKCksIHdoaWNoIGlzIG5vdAo+IGdvaW5nIHRv IHdvcmsgZm9yIFJUCgpJIGFtIGFmcmFpZCB0aGF0J3Mgbm90IGNvcnJlY3QsIHlvdSBjYW4gdXNl IHNwaW5fbG9jaygpIGluIHRocmVhZGVkIAppbnRlcnJ1cHQgaGFuZGxlci4KCj4gVGhlIGZpcnN0 IGNhbiBiZSBmaXhlZCBieSB1c2luZyBub24tdGhyZWFkZWQgaGFuZGxlcnMuCgpUaGUgdHdvIGFy ZSBzb21ld2hhdCByZWxhdGVkLCBpZiB5b3UgdXNlIGEgbm9uLXRocmVhZGVkIGhhbmRsZXIgdGhl biB5b3UgCmFyZSBub3QgZ29pbmcgdG8gaGVscCB0aGUgUlQgY2FzZS4KCkluIGdlbmVyYWwsIHRo ZSB1bnRocmVhZGVkIHNvbHV0aW9uIHNob3VsZCBiZSB1c2VkIGluIHRoZSBsYXN0IHJlc29ydC4K Cj4+Cj4+Pgo+Pj4+Cj4+Pj4+Cj4+Pj4+IEFub3RoZXIgYWx0ZXJuYXRpdmUgY291bGQgYmUgdG8g cXVldWUgdGhlIGlycSBpZiAhZXZ0Y2huLT5lbmFibGVkIGFuZAo+Pj4+PiBoYW5kbGUgaXQgaW4g ZXZ0Y2huX3dyaXRlKCkgKHdoaWNoIGlzIHdoZXJlIGlycSBpcyBzdXBwb3NlZCB0byBiZQo+Pj4+ PiByZS1lbmFibGVkKS4KPj4+PiBXaGF0IGRvIHlvdSBtZWFuIGJ5IHF1ZXVlPyBJcyBpdCBxdWV1 ZWluZyBpbiB0aGUgcmluZz8KPj4+Cj4+Pgo+Pj4gTm8sIEkgd2FzIHRoaW5raW5nIGFib3V0IGhh dmluZyBhIG5ldyBzdHJ1Y3R1cmUgZm9yIGRlZmVycmVkIGludGVycnVwdHMuCj4+Cj4+IEhtbW0s IEkgYW0gbm90IGVudGlyZWx5IHN1cmUgd2hhdCB3b3VsZCBiZSB0aGUgc3RydWN0dXJlIGhlcmUu IENvdWxkCj4+IHlvdSBleHBhbmQgeW91ciB0aGlua2luZz8KPiAKPiBTb21lIHNvcnQgb2YgYSBG SUZPIHRoYXQgc3RvcmVzIHtpcnEsIGRhdGF9IHR1cGxlLiBJdCBjb3VsZCBvYnZpb3VzbHkgYmUK PiBpbXBsZW1lbnRlZCBhcyBhIHJpbmcgYnV0IG5vdCBuZWNlc3NhcmlseSBhcyBYZW4gc2hhcmVk IHJpbmcgKGlmIHRoYXQncwo+IHdoYXQgeW91IHdlcmUgcmVmZXJyaW5nIHRvKS4KClRoZSB1bmRl cmx5aW5nIHF1ZXN0aW9uIGlzIHdoYXQgaGFwcGVuIGlmIHlvdSBtaXNzIGFuIGludGVycnVwdC4g SXMgaXQgCmdvaW5nIHRvIGJlIG9rPyBJZiBubywgdGhlbiB3ZSBoYXZlIHRvIHJlY29yZCBldmVy eXRoaW5nIGFuZCBjYW4ndCAKa2lsbC9zZW5kIGFuIGVycm9yIHRvIHRoZSB1c2VyIGFwcCBiZWNh dXNlIGl0IGlzIG5vdCBpdHMgZmF1bHQuCgpUaGlzIG1lYW5zIGEgRklGTyB3b3VsZCBub3QgYmUg YSB2aWFibGUuIEhvdyBkbyB5b3Ugc2l6ZSBpdD8gU3RhdGljIChpLmUgCnByZS1kZWZpbmVkKSBz aXplIGlzIG5vdCBnb2luZyB0byBiZSBwb3NzaWJsZSBiZWNhdXNlIHlvdSBkb24ndCBrbm93IGhv dyAKbWFueSBpbnRlcnJ1cHQgeW91IGFyZSBnb2luZyB0byByZWNlaXZlIGJlZm9yZSB0aGUgdGhy ZWFkIGhhbmRsZXIgcnVucy4gCllvdSBjYW4ndCBtYWtlIGl0IGdyb3cgZHluYW1pY2FsbHkgYXMg aXQgbWFrZSBiZWNvbWUgcXVpdGUgYmlnIGZvciB0aGUgCnNhbWUgcmVhc29uLgoKRGlzY3Vzc2lu ZyB3aXRoIG15IHRlYW0sIGEgc29sdXRpb24gdGhhdCBjYW1lIHVwIHdvdWxkIGJlIHRvIGludHJv ZHVjZSAKb25lIGF0b21pYyBmaWVsZCBwZXIgZXZlbnQgdG8gcmVjb3JkIHRoZSBudW1iZXIgb2Yg ZXZlbnQgcmVjZWl2ZWQuIEkgCndpbGwgZXhwbG9yZSB0aGF0IHNvbHV0aW9uIHRvbW9ycm93LgoK Q2hlZXJzLAoKLS0gCkp1bGllbiBHcmFsbAoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMu eGVucHJvamVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3Rp bmZvL3hlbi1kZXZlbA==