From mboxrd@z Thu Jan 1 00:00:00 1970 From: shuo.a.liu@intel.com Subject: Re: Why xen-pirq chip use startup_irq() for .irq_enable? Date: Fri, 28 Jul 2017 09:25:15 +0800 Message-ID: <20170728012515.GA14513@shuo-intel.sh.intel.com> References: <20170727130414.GA8141@shuo-intel.sh.intel.com> <68e1206c-219b-85d8-15e8-cc591158207d@oracle.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; Format="flowed" Content-Transfer-Encoding: base64 Return-path: Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dau48-0007rt-DE for xen-devel@lists.xenproject.org; Fri, 28 Jul 2017 01:27:44 +0000 Content-Disposition: inline In-Reply-To: <68e1206c-219b-85d8-15e8-cc591158207d@oracle.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Boris Ostrovsky Cc: Juergen Gross , xen-devel@lists.xenproject.org List-Id: xen-devel@lists.xenproject.org T24gVGh1IDI3Lkp1bCcxNyBhdCAxMjowNjoxMCAtMDQwMCwgQm9yaXMgT3N0cm92c2t5IHdyb3Rl Ogo+KEFkanVzdGluZyBhZGRyZXNzZWVzOiBEYXZpZCBpcyBubyBsb25nZXIgbWFpbnRhaW5pbmcg WGVuIGNvZGUsIEp1ZXJnZW4gaXMpClRoYW5rcyBCb3Jpcy4KPgo+T24gMDcvMjcvMjAxNyAwOTow NCBBTSwgc2h1by5hLmxpdUBpbnRlbC5jb20gd3JvdGU6Cj4+IEhpLAo+PiBIZXJlIGlzIGEgZGV2 aWNlIGhhcyB4ZW4tcGlycS1NU0kgaW50ZXJydXB0LiBJIGZvdW5kIGRvbTAgbWlnaHQgbG9zdAo+ PiBpbnRlcnJ1cHQgZHVyaW5nIGRyaXZlciBpcnFfZGlzYWJsZS9pcnFfZW5hYmxlLgo+PiBUaGVy ZSBpcyBhIHBhaXIgb2YgaXJxX2Rpc2FibGUvZW5hYmxlIGluIGRyaXZlci4gSGVyZSBpcyB0aGUg c2NlbmFyaW8sCj4+ICAxLiBpcnFfZGlzYWJsZShkZXZfaXJxKSAtPiBkaXNhYmxlX2R5bmlycSAt PiBtYXNrX2V2dGNobihkZXZfaXJxCj4+IGNoYW5uZWwpCj4+ICAyLiBkZXYgaW50ZXJydXB0IHJh aXNlZCBieSBIVyBhbmQgWGVuIG1hcmsgaXRzIGV2dGNobiBhcyAqcGVuZGluZyoKPj4gc3RhdHVz Lgo+PiAgMy4gaXJxX2VuYWJsZShkZXZfaXJxKSAtPiBzdGFydHVwX3BpcnEgLT4gZW9pX3BpcnEg LT4KPj4gICAgIGNsZWFyX2V2dGNobihjaGFubmVsIG9mIGRldl9pcnEpIC0+IGNsZWFyICpwZW5k aW5nKiBzdGF0dXMKPj4gIDQuIGNvbnN1bWVfb25lX2V2ZW50IHByb2Nlc3MgdGhlIGRldiBpcnEg ZXZlbnQgd2l0aG91dCBwZW5kaW5nIGJpdAo+PiBhc3NlcnQKPj4gICAgIHdoaWNoIHJlc3VsdCBp biBpbnRlcnJ1cHQgbG9zdCBvbmNlLgo+PiAgNS4gTm8gSFcgaW50ZXJydXB0IHJhaXNpbmcgYW55 bW9yZS4KPj4KPj4gVGhlIGZpcnN0IHF1ZXN0aW9uIGhlcmUgaXMgd2h5IHVzaW5nIHN0YXJ0dXBf aXJxIGZvciAuaXJxX2VuYWJsZQo+PiByYXRoZXIgdGhhbgo+PiBlbmFibGVfZHluaXJxID8gc3Rh cnR1cF9pcnEgd2lsbCBkbyBlb2lfcGlycSB3aG8gY2xlYXIgdGhlIG1hc2sgYml0Cj4+IGFuZCBw ZW5kaW5nCj4+IGJpdCBvZiB0aGUgY2hhbm5lbCB3aGlsZSBlbmFibGVfZHluaXJxIGp1c3Qgb25s eSB1bm1hc2sgdGhlIGNoYW5uZWwuCj4KPlNlZW1zIGxpa2UgZW5hYmxlX2R5bmlycSgpIHdvdWxk IGluZGVlZCBiZSB0aGUgcmlnaHQgY2hvaWNlLiBXaGF0IGlzIGEKPmJpdCBzdHJhbmdlIGlzIHRo YXQgc2NlbmFyaW8gdGhhdCB5b3UgYXJlIGRlc2NyaWJpbmcgbG9va3MgcHJldHR5IGNvbW1vbgo+ c28gd2Ugc2hvdWxkIGhhdmUgaGl0IHRoaXMgcHJvYmxlbSBiZWZvcmUuClRoaXMgcG9pbnQgY29u ZnVzZWQgbWUgYWxzby4gSXQgc2VlbXMgdGhlIGNvZGUgaGFzIGJlZW4gaGVyZSBmb3IgbG9uZyB0 aW1lLgpBbnl3YXksIGlmIHlvdSB0aGluayBpdCBpcyB0aGUgcmlnaHQgZml4LCBpIGNhbiBzZW5k IG91dCBhIGZvcm1hbCBwYXRjaC4KPj4KPj4gU2Vjb25kIHF1ZXN0aW9uIGlzIHRoYXQgd2hhdCdz IHRoZSBwdXJwb3NlIG9mIGVvaV9waXJxIGluIHN0YXJ0dXBfaXJxPwo+Cj5XaGVuIHdlIGFyZSBh Y3R1YWxseSBjcmVhdGluZyBuZXcgcGlycSB3ZSB3YW50IHRvIG1ha2Ugc3VyZSB0aGVyZSBhcmUg bm8KPnBlbmRpbmcgaW50ZXJydXB0cyBsZWZ0IG92ZXIgZnJvbSBwcmV2aW91cyB1c2Ugb2YgdGhl IHBpcnEuCklmIGludGVycnVwdCByYWlzZSBqdXN0IGJlZm9yZSBlb2lfcGlycSBpbiBzdGFydHVw X2lycSwgd2UgbWlnaHQgZmFjZQp0aGUgc2FtZSBpc3N1ZT8gQ2FuIHdlIG1ha2Ugc3VyZSBwaXJx IGlzIGNsZWFuIHdoZW4gZG8gYmluZGluZz8KClRoeCAtClNodW8KCj4tYm9yaXMKPgo+Pgo+PiBC VFcsIGkgY2FuIHJlc29sdmUgbXkgcHJvYmxlbSBieSBiZWxvdyBwYXRjaC4gRG9lcyBpdCBtYWtl IHNlbmNlPwo+Pgo+PiAtLS0KPj4gZHJpdmVycy94ZW4vZXZlbnRzL2V2ZW50c19iYXNlLmMgfCAy ICstCj4+IDEgZmlsZSBjaGFuZ2VkLCAxIGluc2VydGlvbigrKSwgMSBkZWxldGlvbigtKQo+Pgo+ PiBkaWZmIC0tZ2l0IGEvZHJpdmVycy94ZW4vZXZlbnRzL2V2ZW50c19iYXNlLmMKPj4gYi9kcml2 ZXJzL3hlbi9ldmVudHMvZXZlbnRzX2Jhc2UuYwo+PiBpbmRleCA0YmY3YTM0Li4zNDFjNDU2IDEw MDY0NAo+PiAtLS0gYS9kcml2ZXJzL3hlbi9ldmVudHMvZXZlbnRzX2Jhc2UuYwo+PiArKysgYi9k cml2ZXJzL3hlbi9ldmVudHMvZXZlbnRzX2Jhc2UuYwo+PiBAQCAtNTgyLDcgKzU4Miw3IEBAIHN0 YXRpYyB2b2lkIHNodXRkb3duX3BpcnEoc3RydWN0IGlycV9kYXRhICpkYXRhKQo+Pgo+PiBzdGF0 aWMgdm9pZCBlbmFibGVfcGlycShzdHJ1Y3QgaXJxX2RhdGEgKmRhdGEpCj4+IHsKPj4gLSAgICBz dGFydHVwX3BpcnEoZGF0YSk7Cj4+ICsgICAgZW5hYmxlX2R5bmlycShkYXRhKTsKPj4gfQo+Pgo+ PiBzdGF0aWMgdm9pZCBkaXNhYmxlX3BpcnEoc3RydWN0IGlycV9kYXRhICpkYXRhKQo+CgpfX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpYZW4tZGV2ZWwgbWFp bGluZyBsaXN0Clhlbi1kZXZlbEBsaXN0cy54ZW4ub3JnCmh0dHBzOi8vbGlzdHMueGVuLm9yZy94 ZW4tZGV2ZWwK