From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julien Grall Subject: Re: [PATCH v4 27/27] ARM: vGIC: advertise LPI support Date: Wed, 5 Apr 2017 14:06:18 +0100 Message-ID: References: <20170403202829.7278-1-andre.przywara@arm.com> <20170403202829.7278-28-andre.przywara@arm.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 1cvkdj-0000Eg-4p for xen-devel@lists.xenproject.org; Wed, 05 Apr 2017 13:06:23 +0000 In-Reply-To: <20170403202829.7278-28-andre.przywara@arm.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Andre Przywara , Stefano Stabellini Cc: xen-devel@lists.xenproject.org List-Id: xen-devel@lists.xenproject.org SGksCgpTb3VuZHMgbGlrZSBJIG1pc3NlZCB0aGlzIHBhdGNoLiBXZSBzcG9rZSBhYm91dCBpdCBm MmYgdG9kYXksIEkgd2lsbCAKY29tbWVudHMgaGVyZSBmb3IgcmVjb3JkaW5nIHB1cnBvc2UuCgpP biAwMy8wNC8xNyAyMToyOCwgQW5kcmUgUHJ6eXdhcmEgd3JvdGU6Cj4gVG8gbGV0IGEgZ3Vlc3Qg a25vdyBhYm91dCB0aGUgYXZhaWxhYmlsaXR5IG9mIHZpcnR1YWwgTFBJcywgc2V0IHRoZQo+IHJl c3BlY3RpdmUgYml0cyBpbiB0aGUgdmlydHVhbCBHSUMgcmVnaXN0ZXJzIGFuZCBsZXQgYSBndWVz dCBjb250cm9sCj4gdGhlIExQSSBlbmFibGUgYml0Lgo+IE9ubHkgcmVwb3J0IHRoZSBMUEkgY2Fw YWJpbGl0eSBpZiB0aGUgaG9zdCBoYXMgaW5pdGlhbGl6ZWQgYXQgbGVhc3QKPiBvbmUgSVRTLgo+ Cj4gU2lnbmVkLW9mZi1ieTogQW5kcmUgUHJ6eXdhcmEgPGFuZHJlLnByenl3YXJhQGFybS5jb20+ Cj4gLS0tCj4gIHhlbi9hcmNoL2FybS92Z2ljLXYzLmMgfCA3NCArKysrKysrKysrKysrKysrKysr KysrKysrKysrKysrKysrKysrKysrKysrKysrLS0tLQo+ICAxIGZpbGUgY2hhbmdlZCwgNjkgaW5z ZXJ0aW9ucygrKSwgNSBkZWxldGlvbnMoLSkKPgo+IGRpZmYgLS1naXQgYS94ZW4vYXJjaC9hcm0v dmdpYy12My5jIGIveGVuL2FyY2gvYXJtL3ZnaWMtdjMuYwo+IGluZGV4IDNmYzMwOWUuLmE2YTAx MjYgMTAwNjQ0Cj4gLS0tIGEveGVuL2FyY2gvYXJtL3ZnaWMtdjMuYwo+ICsrKyBiL3hlbi9hcmNo L2FybS92Z2ljLXYzLmMKPiBAQCAtMTY4LDggKzE2OCwxMCBAQCBzdGF0aWMgaW50IF9fdmdpY192 M19yZGlzdHJfcmRfbW1pb19yZWFkKHN0cnVjdCB2Y3B1ICp2LCBtbWlvX2luZm9fdCAqaW5mbywK PiAgICAgIHN3aXRjaCAoIGdpY3JfcmVnICkKPiAgICAgIHsKPiAgICAgIGNhc2UgVlJFRzMyKEdJ Q1JfQ1RMUik6Cj4gLSAgICAgICAgLyogV2UgaGF2ZSBub3QgaW1wbGVtZW50ZWQgTFBJJ3MsIHJl YWQgemVybyAqLwo+IC0gICAgICAgIGdvdG8gcmVhZF9hc196ZXJvXzMyOwo+ICsgICAgICAgIGlm ICggZGFidC5zaXplICE9IERBQlRfV09SRCApIGdvdG8gYmFkX3dpZHRoOwo+ICsgICAgICAgICpy ID0gdmdpY19yZWczMl9leHRyYWN0KCEhKHYtPmFyY2gudmdpYy5mbGFncyAmIFZHSUNfVjNfTFBJ U19FTkFCTEVEKSwKPiArICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICBpbmZvKTsKCkl0 IHdvdWxkIGJlIGNsZWFyZXIgdG8gdXNlIGEgdGVtcG9yYXJ5IHZhcmlhYmxlIGhlcmUuCgo+ICsg ICAgICAgIHJldHVybiAxOwo+Cj4gICAgICBjYXNlIFZSRUczMihHSUNSX0lJRFIpOgo+ICAgICAg ICAgIGlmICggZGFidC5zaXplICE9IERBQlRfV09SRCApIGdvdG8gYmFkX3dpZHRoOwo+IEBAIC0x ODEsMTYgKzE4MywxOSBAQCBzdGF0aWMgaW50IF9fdmdpY192M19yZGlzdHJfcmRfbW1pb19yZWFk KHN0cnVjdCB2Y3B1ICp2LCBtbWlvX2luZm9fdCAqaW5mbywKPiAgICAgICAgICB1aW50NjRfdCB0 eXBlciwgYWZmOwo+Cj4gICAgICAgICAgaWYgKCAhdmdpY19yZWc2NF9jaGVja19hY2Nlc3MoZGFi dCkgKSBnb3RvIGJhZF93aWR0aDsKPiAtICAgICAgICAvKiBUQkQ6IFVwZGF0ZSBwcm9jZXNzb3Ig aWQgaW4gWzIzOjhdIHdoZW4gSVRTIHN1cHBvcnQgaXMgYWRkZWQgKi8KPiAgICAgICAgICBhZmYg PSAoTVBJRFJfQUZGSU5JVFlfTEVWRUwodi0+YXJjaC52bXBpZHIsIDMpIDw8IDU2IHwKPiAgICAg ICAgICAgICAgICAgTVBJRFJfQUZGSU5JVFlfTEVWRUwodi0+YXJjaC52bXBpZHIsIDIpIDw8IDQ4 IHwKPiAgICAgICAgICAgICAgICAgTVBJRFJfQUZGSU5JVFlfTEVWRUwodi0+YXJjaC52bXBpZHIs IDEpIDw8IDQwIHwKPiAgICAgICAgICAgICAgICAgTVBJRFJfQUZGSU5JVFlfTEVWRUwodi0+YXJj aC52bXBpZHIsIDApIDw8IDMyKTsKPiAgICAgICAgICB0eXBlciA9IGFmZjsKPiArICAgICAgICB0 eXBlciB8PSAodi0+dmNwdV9pZCAmIDB4ZmZmZikgPDwgODsKClBsZWFzZSBkb2N1bWVudCBpbiB0 aGUgY29kZSB3aHkgeW91IGFkZGVkIHRoYXQuCgo+Cj4gICAgICAgICAgaWYgKCB2LT5hcmNoLnZn aWMuZmxhZ3MgJiBWR0lDX1YzX1JESVNUX0xBU1QgKQo+ICAgICAgICAgICAgICB0eXBlciB8PSBH SUNSX1RZUEVSX0xBU1Q7Cj4KPiArICAgICAgICBpZiAoIHYtPmRvbWFpbi0+YXJjaC52Z2ljLmhh c19pdHMgKQo+ICsgICAgICAgICAgICB0eXBlciB8PSBHSUNSX1RZUEVSX1BMUElTOwo+ICsKPiAg ICAgICAgICAqciA9IHZnaWNfcmVnNjRfZXh0cmFjdCh0eXBlciwgaW5mbyk7Cj4KPiAgICAgICAg ICByZXR1cm4gMTsKPiBAQCAtNDMzLDYgKzQzOCwzNSBAQCBzdGF0aWMgdWludDY0X3Qgc2FuaXRp emVfcGVuZGJhc2VyKHVpbnQ2NF90IHJlZykKPiAgICAgIHJldHVybiByZWc7Cj4gIH0KPgo+ICtz dGF0aWMgdm9pZCB2Z2ljX3ZjcHVfZW5hYmxlX2xwaXMoc3RydWN0IHZjcHUgKnYpCj4gK3sKPiAr ICAgIHVpbnQ2NF90IHJlZyA9IHYtPmRvbWFpbi0+YXJjaC52Z2ljLnJkaXN0X3Byb3BiYXNlOwo+ ICsgICAgdW5zaWduZWQgaW50IG5yX2xwaXMgPSBCSVQoKHJlZyAmIDB4MWYpICsgMSkgLSBMUElf T0ZGU0VUOwo+ICsgICAgaW50IG5yX3BhZ2VzOwo+ICsKPiArICAgIC8qIFRoZSBmaXJzdCBWQ1BV IHRvIGVuYWJsZSBMUElzIG1hcHMgdGhlIHByb3BlcnR5IHRhYmxlLiAqLwo+ICsgICAgaWYgKCAh di0+ZG9tYWluLT5hcmNoLnZnaWMubnJfbHBpcyApCj4gKyAgICB7Cj4gKyAgICAgICAgdi0+ZG9t YWluLT5hcmNoLnZnaWMubnJfbHBpcyA9IG5yX2xwaXM7Cj4gKwo+ICsgICAgICAgIG5yX3BhZ2Vz ID0gRElWX1JPVU5EX1VQKG5yX2xwaXMsIFBBR0VfU0laRSk7Cj4gKyAgICAgICAgZ2V0X2d1ZXN0 X3BhZ2VzKHYtPmRvbWFpbiwgcmVnICYgR0VOTUFTS19VTEwoNTEsIDEyKSwgbnJfcGFnZXMpOwo+ ICsgICAgICAgIGdwcmludGsoWEVOTE9HX0lORk8sICJWR0lDLXYzOiBWQ1BVJWQgbWFwcGVkICVk IHBhZ2VzIGZvciBwcm9wZXJ0eSB0YWJsZVxuIiwKPiArICAgICAgICAgICAgICAgdi0+dmNwdV9p ZCwgbnJfcGFnZXMpOwo+ICsgICAgfQo+ICsgICAgbnJfcGFnZXMgPSBESVZfUk9VTkRfVVAoKChu cl9scGlzICsgTFBJX09GRlNFVCkgLyA4KSwgUEFHRV9TSVpFKTsKPiArICAgIHJlZyA9IHYtPmFy Y2gudmdpYy5yZGlzdF9wZW5kYmFzZTsKPiArCj4gKyAgICBnZXRfZ3Vlc3RfcGFnZXModi0+ZG9t YWluLCByZWcgJiBHRU5NQVNLX1VMTCg1MSwgMTIpLCBucl9wYWdlcyk7Cj4gKwo+ICsgICAgZ3By aW50ayhYRU5MT0dfSU5GTywgIlZHSUMtdjM6IFZDUFUlZCBtYXBwZWQgJWQgcGFnZXMgZm9yIHBl bmRpbmcgdGFibGVcbiIsCj4gKyAgICAgICAgICAgIHYtPnZjcHVfaWQsIG5yX3BhZ2VzKTsKPiAr Cj4gKyAgICB2LT5hcmNoLnZnaWMuZmxhZ3MgfD0gVkdJQ19WM19MUElTX0VOQUJMRUQ7Cj4gKwo+ ICsgICAgcHJpbnRrKCJWR0lDdjM6IGVuYWJsZWQgJWQgTFBJcyBmb3IgVkNQVSVkXG4iLCBucl9s cGlzLCB2LT52Y3B1X2lkKTsKPiArfQo+ICsKPiAgc3RhdGljIGludCBfX3ZnaWNfdjNfcmRpc3Ry X3JkX21taW9fd3JpdGUoc3RydWN0IHZjcHUgKnYsIG1taW9faW5mb190ICppbmZvLAo+ICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICB1aW50MzJfdCBnaWNyX3JlZywK PiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgcmVnaXN0ZXJfdCBy KQo+IEBAIC00NDMsOCArNDc3LDE4IEBAIHN0YXRpYyBpbnQgX192Z2ljX3YzX3JkaXN0cl9yZF9t bWlvX3dyaXRlKHN0cnVjdCB2Y3B1ICp2LCBtbWlvX2luZm9fdCAqaW5mbywKPiAgICAgIHN3aXRj aCAoIGdpY3JfcmVnICkKPiAgICAgIHsKPiAgICAgIGNhc2UgVlJFRzMyKEdJQ1JfQ1RMUik6Cj4g LSAgICAgICAgLyogTFBJJ3Mgbm90IGltcGxlbWVudGVkICovCj4gLSAgICAgICAgZ290byB3cml0 ZV9pZ25vcmVfMzI7Cj4gKyAgICAgICAgaWYgKCBkYWJ0LnNpemUgIT0gREFCVF9XT1JEICkgZ290 byBiYWRfd2lkdGg7Cj4gKyAgICAgICAgaWYgKCAhdi0+ZG9tYWluLT5hcmNoLnZnaWMuaGFzX2l0 cyApCj4gKyAgICAgICAgICAgIHJldHVybiAxOwo+ICsKPiArICAgICAgICAvKiBMUElzIGNhbiBv bmx5IGJlIGVuYWJsZWQgb25jZSwgYnV0IG5ldmVyIGRpc2FibGVkIGFnYWluLiAqLwo+ICsgICAg ICAgIGlmICggIShyICYgR0lDUl9DVExSX0VOQUJMRV9MUElTKSB8fAo+ICsgICAgICAgICAgICAg KHYtPmFyY2gudmdpYy5mbGFncyAmIFZHSUNfVjNfTFBJU19FTkFCTEVEKSApCj4gKyAgICAgICAg ICAgIHJldHVybiAxOwoKVGhpcyBsaWtlbHkgbmVlZHMgc29tZSBsb2NraW5nLgoKPiArCj4gKyAg ICAgICAgdmdpY192Y3B1X2VuYWJsZV9scGlzKHYpOwo+ICsKPiArICAgICAgICByZXR1cm4gMTsK Pgo+ICAgICAgY2FzZSBWUkVHMzIoR0lDUl9JSURSKToKPiAgICAgICAgICAvKiBSTyAqLwo+IEBA IC0xMDQ0LDYgKzEwODgsMTEgQEAgc3RhdGljIGludCB2Z2ljX3YzX2Rpc3RyX21taW9fcmVhZChz dHJ1Y3QgdmNwdSAqdiwgbW1pb19pbmZvX3QgKmluZm8sCj4gICAgICAgICAgdHlwZXIgPSAoKG5j cHVzIC0gMSkgPDwgR0lDRF9UWVBFX0NQVVNfU0hJRlQgfAo+ICAgICAgICAgICAgICAgICAgIERJ Vl9ST1VORF9VUCh2LT5kb21haW4tPmFyY2gudmdpYy5ucl9zcGlzLCAzMikpOwo+Cj4gKyAgICAg ICAgaWYgKCB2LT5kb21haW4tPmFyY2gudmdpYy5oYXNfaXRzICkKPiArICAgICAgICB7Cj4gKyAg ICAgICAgICAgIHR5cGVyIHw9IEdJQ0RfVFlQRV9MUElTOwo+ICsgICAgICAgICAgICBpcnFfYml0 cyA9IDE2OwoKV2h5IDE2PyBMaWtlbHksIHRoaXMgd2lsbCBiZSBiYXNlZCBvbiB0aGUgY29uZmln dXJhdGlvbiBvZiB0aGUgZ3Vlc3QuCgo+ICsgICAgICAgIH0KPiAgICAgICAgICB0eXBlciB8PSAo aXJxX2JpdHMgLSAxKSA8PCBHSUNEX1RZUEVfSURfQklUU19TSElGVDsKPgo+ICAgICAgICAgICpy ID0gdmdpY19yZWczMl9leHRyYWN0KHR5cGVyLCBpbmZvKTsKPiBAQCAtMTY2NSw2ICsxNzE0LDIx IEBAIHN0YXRpYyBpbnQgdmdpY192M19kb21haW5faW5pdChzdHJ1Y3QgZG9tYWluICpkKQo+Cj4g IHN0YXRpYyB2b2lkIHZnaWNfdjNfZG9tYWluX2ZyZWUoc3RydWN0IGRvbWFpbiAqZCkKPiAgewo+ ICsgICAgaW50IG5yX3BhZ2VzOwo+ICsgICAgc3RydWN0IHZjcHUgKnY7Cj4gKwo+ICsgICAgaWYg KCBkLT5hcmNoLnZnaWMubnJfbHBpcyApCj4gKyAgICB7Cj4gKyAgICAgICAgbnJfcGFnZXMgPSBE SVZfUk9VTkRfVVAoZC0+YXJjaC52Z2ljLm5yX2xwaXMsIFBBR0VfU0laRSk7Cj4gKyAgICAgICAg cHV0X2d1ZXN0X3BhZ2VzKGQsIGQtPmFyY2gudmdpYy5yZGlzdF9wcm9wYmFzZSAmIEdFTk1BU0tf VUxMKDUxLCAxMiksCj4gKyAgICAgICAgICAgICAgICAgICAgICAgIG5yX3BhZ2VzKTsKPiArCj4g KyAgICAgICAgbnJfcGFnZXMgPSBESVZfUk9VTkRfVVAoKGQtPmFyY2gudmdpYy5ucl9scGlzICsg TFBJX09GRlNFVCkgLyA4LAo+ICsgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIFBBR0Vf U0laRSk7Cj4gKyAgICAgICAgZm9yX2VhY2hfdmNwdShkLCB2KQo+ICsgICAgICAgICAgICBwdXRf Z3Vlc3RfcGFnZXMoZCwgdi0+YXJjaC52Z2ljLnJkaXN0X3BlbmRiYXNlICYgR0VOTUFTS19VTEwo NTEsIDEyKSwKPiArICAgICAgICAgICAgICAgICAgICAgICAgICAgIG5yX3BhZ2VzKTsKPiArICAg IH0KPiAgICAgIGdpY3YzX2l0c191bm1hcF9hbGxfZGV2aWNlcyhkKTsKPiAgICAgIHJhZGl4X3Ry ZWVfZGVzdHJveSgmZC0+YXJjaC52Z2ljLnBlbmRfbHBpX3RyZWUsIE5VTEwpOwo+ICAgICAgeGZy ZWUoZC0+YXJjaC52Z2ljLnJkaXN0X3JlZ2lvbnMpOwo+CgpDaGVlcnMsCgotLSAKSnVsaWVuIEdy YWxsCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpYZW4t ZGV2ZWwgbWFpbGluZyBsaXN0Clhlbi1kZXZlbEBsaXN0cy54ZW4ub3JnCmh0dHBzOi8vbGlzdHMu eGVuLm9yZy94ZW4tZGV2ZWwK