From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joao Martins Subject: Re: [PATCH] x86/time: use correct (local) time stamp in constant-TSC calibration fast path Date: Thu, 9 Jun 2016 13:11:51 +0100 Message-ID: <57595D07.90107@oracle.com> References: <575976AE02000078000F3695@prv-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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 1bAynq-0003tm-Eh for xen-devel@lists.xenproject.org; Thu, 09 Jun 2016 12:11:14 +0000 In-Reply-To: <575976AE02000078000F3695@prv-mh.provo.novell.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Jan Beulich Cc: xen-devel , Wei Liu , Dario Faggioli , Andrew Cooper List-Id: xen-devel@lists.xenproject.org CgpPbiAwNi8wOS8yMDE2IDAxOjAxIFBNLCBKYW4gQmV1bGljaCB3cm90ZToKPiBUaGlzIGxvb2tz IGxpa2UgYSBjb3B5IGFuZCBwYXN0ZSBtaXN0YWtlIGluIGNvbW1pdCAxYjZhOTk4OTJkICgieDg2 Ogo+IFNpbXBsZXIgdGltZSBoYW5kbGluZyB3aGVuIFRTQyBpcyBjb25zdGFudCBhY3Jvc3MgYWxs IHBvd2VyIHNhdmluZwo+IHN0YXRlcyIpLCByZXNwb25zaWJsZSBmb3Igb2NjYXNpb25hbCBtYW55 LW1pY3Jvc2Vjb25kIGNyb3NzLUNQVSBza2V3IG9mCj4gd2hhdCBOT1coKSByZXR1cm5zLgo+IAo+ IEFsc28gaW1wcm92ZSB0aGUgY29ycmVsYXRpb24gYmV0d2VlbiBsb2NhbCBUU0MgYW5kIHN0aW1l IHN0YW1wcwo+IG9idGFpbmVkIGF0IHRoZSBlbmQgb2YgdGhlIHR3byBjYWxpYnJhdGlvbiBoYW5k bGVyczogQ29tcHV0ZSB0aGUgc3RpbWUKPiBvbmUgZnJvbSB0aGUgVFNDIG9uZSwgaW5zdGVhZCBv ZiBkb2luZyBhbm90aGVyIHJkdHNjKCkgZm9yIHRoYXQKPiBjb21wdWF0aW9uLgo+IAo+IFNpZ25l ZC1vZmYtYnk6IEphbiBCZXVsaWNoIDxqYmV1bGljaEBzdXNlLmNvbT4KPiAtLS0KPiBBcyB0byA0 LjcgaW5jbHVzaW9uOiBUaGlzIG9mIGNvdXJzZSBsb29rcyBsaWtlIGEgcHJldHR5IGJsYXRhbnQg bWlzdGFrZQo+IHRoYXQgaGFzIGJlZW4gdGhlcmUgZm9yIG1hbnkgeWVhcnMgKGFuZCBoZW5jZSBt YW55IHJlbGVhc2VzKS4gVGhlcmUncwo+IGNlcnRhaW5seSBub24temVybyByaXNrIHRoYXQgSSdt IG92ZXJsb29raW5nIHNvbWV0aGluZyBoZXJlIChkZXNwaXRlCj4gSm9hbyBhcHBhcmVudGx5IGhh dmluZyBjb21lIHRvIHRoZSBzYW1lIGNvbmNsdXNpb24pLCBzbyBJIGNhbid0IHJlYWxseQo+IG1h a2UgdXAgbXkgbWluZCBvbiB3aGV0aGVyIHRvIHJlcXVlc3QgdGhpcyBwYXRjaCB0byBiZSBwdXQg dGhlcmUgcmlnaHQKPiBhd2F5LCBvciByYXRoZXIgaGF2aW5nIGxpbmdlciBpbiAtdW5zdGFibGUg Zm9yIGEgd2hpbGUuCj4gCkluaXRpYWxseSBJIHRob3VnaHQgb2YgdGhpcyBhcyBhIGZpeCB0b28s IGJ1dCB0aGVuIHdvdWxkbid0IGhhdmluZwp0LT5zdGltZV9sb2NhbF9zdGFtcCBiZSBjLT5zdGlt ZV9sb2NhbF9zdGFtcCwgcmVuZGVyIG5vIHVzZSB0byB0aGUKcGxhdGZvcm0gdGltZXIgcmVhZHMg ZG9uZSBvbiBjYWxpYnJhdGlvbj8gVW5sZXNzIHdlIHdvdWxkIGNoYW5nZQp1cGRhdGVfdmNwdV9z eXN0ZW0gdG8gdXNlIHN0aW1lX21hc3Rlcl9zdGFtcCBpbnN0ZWFkPwpzdGltZV9tYXN0ZXJfc3Rh bXAgZmllbGQgaXNuJ3QgdXNlZCBhbnl3aGVyZSBvdGhlciB0aGFuIHRoZSBkb20wIGluamVjdGVk CmNwdV9mcmVxdWVuY3lfY2hhbmdlIG9yIHdoZW4gYXQgYm9vdCBzZWVkaW5nIHRoZSBjcHVfdGlt ZSBzdHJ1Y3Qgb24KaW5pdF9wZXJjcHVfdGltZSAoYW5kIHRoZSBhbHJlYWR5IG1lbnRpb25lZCB1 c2Ugb24gbG9jYWxfdGltZV9jYWxpYnJhdGlvbikgPwppbml0X3BlcmNwdV90aW1lIGFsc28gdGFr ZXMgYSBkaWZmZXJlbnQgcmVhZCBvZiB0aGUgcGxhdGZvcm0gdGltZXIgcGVyCmNwdSBhbmQgY291 bGQgcHJvYmFibHkgYmUgaW5oZXJpdGVkIGJ5IGEgcmVhZCBkb25lIG9uIHRoZSBib290IHByb2Nl c3NvcgphbmQgd3JpdHRlbiBvbiByZW1haW5pbmcgQ1BVcywgc28gdGhhdCBhbGwgd291bGQgc3Rh cnQgZnJvbSB0aGUgc2FtZSBzdGFtcC4KSU9XIC0gdGhpcyBzb3VuZHMgbGlrZSB0aW1lIHdlIGFy ZSB0dXJuaW5nIHN0aW1lIHRvIGJlIHRvdGFsbHkgVFNDIGV4Y2VwdAp3aGVuIGluaXRpYWxseSBz ZWVkaW5nIGVhY2ggY3B1X3RpbWU/Cgo+IC0tLSBhL3hlbi9hcmNoL3g4Ni90aW1lLmMKPiArKysg Yi94ZW4vYXJjaC94ODYvdGltZS5jCj4gQEAgLTk5OCw3ICs5OTgsNyBAQCBzdGF0aWMgdm9pZCBs b2NhbF90aW1lX2NhbGlicmF0aW9uKHZvaWQpCj4gICAgICAgICAgLyogQXRvbWljYWxseSByZWFk IGNwdV9jYWxpYnJhdGlvbiBzdHJ1Y3QgYW5kIHdyaXRlIGNwdV90aW1lIHN0cnVjdC4gKi8KPiAg ICAgICAgICBsb2NhbF9pcnFfZGlzYWJsZSgpOwo+ICAgICAgICAgIHQtPmxvY2FsX3RzY19zdGFt cCAgICA9IGMtPmxvY2FsX3RzY19zdGFtcDsKPiAtICAgICAgICB0LT5zdGltZV9sb2NhbF9zdGFt cCAgPSBjLT5zdGltZV9tYXN0ZXJfc3RhbXA7Cj4gKyAgICAgICAgdC0+c3RpbWVfbG9jYWxfc3Rh bXAgID0gYy0+c3RpbWVfbG9jYWxfc3RhbXA7Cj4gICAgICAgICAgdC0+c3RpbWVfbWFzdGVyX3N0 YW1wID0gYy0+c3RpbWVfbWFzdGVyX3N0YW1wOwo+ICAgICAgICAgIGxvY2FsX2lycV9lbmFibGUo KTsKPiAgICAgICAgICB1cGRhdGVfdmNwdV9zeXN0ZW1fdGltZShjdXJyZW50KTsKPiBAQCAtMTI3 NSw3ICsxMjc1LDcgQEAgc3RhdGljIHZvaWQgdGltZV9jYWxpYnJhdGlvbl90c2NfcmVuZGV6dgo+ ICAgICAgfQo+ICAKPiAgICAgIGMtPmxvY2FsX3RzY19zdGFtcCA9IHJkdHNjKCk7Cj4gLSAgICBj LT5zdGltZV9sb2NhbF9zdGFtcCA9IGdldF9zX3RpbWUoKTsKPiArICAgIGMtPnN0aW1lX2xvY2Fs X3N0YW1wID0gZ2V0X3NfdGltZV9maXhlZChjLT5sb2NhbF90c2Nfc3RhbXApOwo+ICAgICAgYy0+ c3RpbWVfbWFzdGVyX3N0YW1wID0gci0+bWFzdGVyX3N0aW1lOwo+ICAKPiAgICAgIHJhaXNlX3Nv ZnRpcnEoVElNRV9DQUxJQlJBVEVfU09GVElSUSk7Cj4gQEAgLTEzMDUsNyArMTMwNSw3IEBAIHN0 YXRpYyB2b2lkIHRpbWVfY2FsaWJyYXRpb25fc3RkX3JlbmRlenYKPiAgICAgIH0KPiAgCj4gICAg ICBjLT5sb2NhbF90c2Nfc3RhbXAgPSByZHRzYygpOwo+IC0gICAgYy0+c3RpbWVfbG9jYWxfc3Rh bXAgPSBnZXRfc190aW1lKCk7Cj4gKyAgICBjLT5zdGltZV9sb2NhbF9zdGFtcCA9IGdldF9zX3Rp bWVfZml4ZWQoYy0+bG9jYWxfdHNjX3N0YW1wKTsKPiAgICAgIGMtPnN0aW1lX21hc3Rlcl9zdGFt cCA9IHItPm1hc3Rlcl9zdGltZTsKPiAgCj4gICAgICByYWlzZV9zb2Z0aXJxKFRJTUVfQ0FMSUJS QVRFX1NPRlRJUlEpOwo+IAo+IAo+IAoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVu Lm9yZwpodHRwOi8vbGlzdHMueGVuLm9yZy94ZW4tZGV2ZWwK