From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cooper Subject: Re: [PATCH 5/5] x86/time: implement PVCLOCK_TSC_STABLE_BIT Date: Fri, 18 Mar 2016 20:58:44 +0000 Message-ID: <56EC6C04.5060608@citrix.com> References: <1458231136-13457-1-git-send-email-joao.m.martins@oracle.com> <1458231136-13457-6-git-send-email-joao.m.martins@oracle.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <1458231136-13457-6-git-send-email-joao.m.martins@oracle.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Joao Martins , xen-devel@lists.xen.org Cc: Keir Fraser , Jan Beulich List-Id: xen-devel@lists.xenproject.org T24gMTcvMDMvMTYgMTY6MTIsIEpvYW8gTWFydGlucyB3cm90ZToKPiBXaGVuIHVzaW5nIFRTQyBh cyBjbG9ja3NvdXJjZSB3ZSB3aWxsIHNvbGVseSByZWx5IG9uIFRTQyBmb3IgdXBkYXRpbmcKPiB2 Y3B1IHRpbWUgaW5mb3MgKHB2dGkpLiBSaWdodCBub3csIGVhY2ggdkNQVSB0YWtlcyB0aGUgdHNj X3RpbWVzdGFtcCBhdAo+IGRpZmZlcmVudCBpbnN0YW50cyBtZWFuaW5nIGV2ZXJ5IEVQT0NIICsg ZGVsdGEuIFRoaXMgZGVsdGEgaXMgdmFyaWFibGUKPiBkZXBlbmRpbmcgb24gdGhlIHRpbWUgdGhl IENQVSBjYWxpYnJhdGVzIHdpdGggQ1BVIDAgKG1hc3RlciksIGFuZCB3aWxsCj4gbGlrZWx5IGJl IGRpZmZlcmVudCBhbmQgdmFyaWFibGUgYWNyb3NzIHZDUFVTLiBUaGlzIG1lYW5zIHRoYXQgZWFj aCBWQ1BVCj4gcHZ0aSB3b24ndCBhY2NvdW50IHRvIGl0cyBjYWxpYnJhdGlvbiBlcnJvciB3aGlj aCBjb3VsZCBsZWFkIHRvIHRpbWUKPiBnb2luZyBiYWNrd2FyZHMsIGFuZCBhbGxvd2luZyBhIHNp dHVhdGlvbiB3aGVyZSB0aW1lIHJlYWQgb24gVkNQVSBCCj4gaW1tZWRpYXRlbHkgYWZ0ZXIgQSBi ZWluZyBzbWFsbGVyLiBXaGlsZSB0aGlzIGRvZXNuJ3QgaGFwcGVuIGEgbG90LCBJCj4gd2FzIGFi bGUgdG8gb2JzZXJ2ZSAoZm9yIGNsb2Nrc291cmNlPXRzYykgYXJvdW5kIDUwIHRpbWVzIGluIGFu IGhvdXIKPiBoYXZpbmcgd2FycHMgb2YgPCAxMDAgbnMuCj4KPiBUaGlzIHBhdGNoIHByb3Bvc2Vz IHJlbHlpbmcgb24gaG9zdCBUU0Mgc3luY2hyb25pemF0aW9uIGFuZCBwYXNzdGhyb3VnaAo+IG9m IHRoZSBtYXN0ZXIgdHNjIHRvIHRoZSBndWVzdCwgd2hlbiBydW5uaW5nIG9uIGEgVFNDLXNhZmUg cGxhdGZvcm0uICBPbgo+IHRoZSByZW5kZXp2b3VzIGZ1bmN0aW9uIHdlIHdpbGwgcmV0cmlldmUg dGhlIHBsYXRmb3JtIHRpbWUgaW4gbnMgYW5kIHRoZQo+IGxhc3QgY291bnQgcmVhZCBieSB0aGUg Y2xvY2tzb3VyY2UgdGhhdCB3YXMgdXNlZCB0byBjb21wdXRlIHN5c3RlbSB0aW1lLgo+IG1hc3Rl ciB3aWxsIHdyaXRlIGJvdGggbWFzdGVyX3RzY19zdGFtcCBhbmQgbWFzdGVyX3N0aW1lLCBhbmQg dGhlIG90aGVyCj4gdkNQVVMgKHNsYXZlKSB3aWxsIHVzZSBpdCB0byB1cGRhdGUgdGhlaXIgY29y cmVzcG9uZGVudCB0aW1lIGluZm9zLgo+IFRoaXMgd2F5IHdlIGNhbiBndWFyYW50ZWUgdGhhdCBv biBhIHBsYXRmb3JtIHdpdGggYSBjb25zdGFudCBhbmQKPiByZWxpYWJsZSBUU0MsIHRoYXQgdGhl IHRpbWUgcmVhZCBvbiB2Y3B1IEIgcmlnaHQgYWZ0ZXIgQSBpcyBiaWdnZXIKPiBpbmRlcGVuZGVu dGx5IG9mIHRoZSBWQ1BVIGNhbGlicmF0aW9uIGVycm9yLiBTaW5jZSBwdmNsb2NrIHRpbWUgaW5m b3MKPiBhcmUgbW9ub3RvbmljIGFzIHNlZW4gYnkgYW55IHZDUFUgc2V0IFBWQ0xPQ0tfVFNDX1NU QUJMRV9CSVQsIHdoaWNoIHRoZW4KPiBlbmFibGVzIHVzYWdlIG9mIFZEU08gb24gTGludXguICBJ SVVDLCB0aGlzIGlzIHNpbWlsYXIgdG8gaG93IGl0J3MKPiBpbXBsZW1lbnRlZCBvbiBLVk0uCj4K PiBTaWduZWQtb2ZmLWJ5OiBKb2FvIE1hcnRpbnMgPGpvYW8ubS5tYXJ0aW5zQG9yYWNsZS5jb20+ Cj4gLS0tCj4gQ2M6IEtlaXIgRnJhc2VyIDxrZWlyQHhlbi5vcmc+Cj4gQ2M6IEphbiBCZXVsaWNo IDxqYmV1bGljaEBzdXNlLmNvbT4KPiBDYzogQW5kcmV3IENvb3BlciA8YW5kcmV3LmNvb3BlcjNA Y2l0cml4LmNvbT4KPiAtLS0KPiAgeGVuL2FyY2gveDg2L3RpbWUuYyB8IDEyICsrKysrKysrKyst LQo+ICAxIGZpbGUgY2hhbmdlZCwgMTAgaW5zZXJ0aW9ucygrKSwgMiBkZWxldGlvbnMoLSkKPgo+ IGRpZmYgLS1naXQgYS94ZW4vYXJjaC94ODYvdGltZS5jIGIveGVuL2FyY2gveDg2L3RpbWUuYwo+ IGluZGV4IDg5YzM1ZDAuLmExNzUyOWMgMTAwNjQ0Cj4gLS0tIGEveGVuL2FyY2gveDg2L3RpbWUu Ywo+ICsrKyBiL3hlbi9hcmNoL3g4Ni90aW1lLmMKPiBAQCAtOTE3LDYgKzkxNyw4IEBAIHN0YXRp YyB2b2lkIF9fdXBkYXRlX3ZjcHVfc3lzdGVtX3RpbWUoc3RydWN0IHZjcHUgKnYsIGludCBmb3Jj ZSkKPiAgCj4gICAgICBfdS50c2NfdGltZXN0YW1wID0gdHNjX3N0YW1wOwo+ICAgICAgX3Uuc3lz dGVtX3RpbWUgICA9IHQtPnN0aW1lX2xvY2FsX3N0YW1wOwo+ICsgICAgaWYgKCBjbG9ja3NvdXJj ZV9pc190c2MgKQo+ICsgICAgICAgIF91LmZsYWdzICAgIHw9IFBWQ0xPQ0tfVFNDX1NUQUJMRV9C SVQ7Cj4gIAo+ICAgICAgaWYgKCBpc19odm1fZG9tYWluKGQpICkKPiAgICAgICAgICBfdS50c2Nf dGltZXN0YW1wICs9IHYtPmFyY2guaHZtX3ZjcHUuY2FjaGVfdHNjX29mZnNldDsKPiBAQCAtMTM3 Nyw5ICsxMzc5LDEyIEBAIHN0YXRpYyB2b2lkIHRpbWVfY2FsaWJyYXRpb25fc3RkX3JlbmRlenZv dXModm9pZCAqX3IpCj4gIAo+ICAgICAgaWYgKCBzbXBfcHJvY2Vzc29yX2lkKCkgPT0gMCApCj4g ICAgICB7Cj4gKyAgICAgICAgdTY0IGxhc3RfY291bnRlcjsKCkJsYW5rIGxpbmUgaGVyZSBwbGVh c2UuCgo+ICAgICAgICAgIHdoaWxlICggYXRvbWljX3JlYWQoJnItPnNlbWFwaG9yZSkgIT0gKHRv dGFsX2NwdXMgLSAxKSApCj4gICAgICAgICAgICAgIGNwdV9yZWxheCgpOwo+IC0gICAgICAgIHIt Pm1hc3Rlcl9zdGltZSA9IHJlYWRfcGxhdGZvcm1fc3RpbWUoKTsKPiArICAgICAgICByLT5tYXN0 ZXJfc3RpbWUgPSByZWFkX3BsYXRmb3JtX3N0aW1lKCZsYXN0X2NvdW50ZXIpOwo+ICsgICAgICAg IGlmICggY2xvY2tzb3VyY2VfaXNfdHNjICkKPiArICAgICAgICAgICAgci0+bWFzdGVyX3RzY19z dGFtcCA9IGxhc3RfY291bnRlcjsKPiAgICAgICAgICBtYigpOyAvKiB3cml0ZSByLT5tYXN0ZXJf c3RpbWUgL3RoZW4vIHNpZ25hbCAqLwo+ICAgICAgICAgIGF0b21pY19pbmMoJnItPnNlbWFwaG9y ZSk7Cj4gICAgICB9Cj4gQEAgLTEzOTEsNyArMTM5NiwxMCBAQCBzdGF0aWMgdm9pZCB0aW1lX2Nh bGlicmF0aW9uX3N0ZF9yZW5kZXp2b3VzKHZvaWQgKl9yKQo+ICAgICAgICAgIG1iKCk7IC8qIHJl Y2VpdmUgc2lnbmFsIC90aGVuLyByZWFkIHItPm1hc3Rlcl9zdGltZSAqLwo+ICAgICAgfQo+ICAK PiAtICAgIGMtPmxvY2FsX3RzY19zdGFtcCA9IHJkdHNjKCk7Cj4gKyAgICBpZiAoIGNsb2Nrc291 cmNlX2lzX3RzYyApCj4gKyAgICAgICAgYy0+bG9jYWxfdHNjX3N0YW1wID0gci0+bWFzdGVyX3Rz Y19zdGFtcDsKPiArICAgIGVsc2UKPiArICAgICAgICBjLT5sb2NhbF90c2Nfc3RhbXAgPSByZHRz YygpOwo+ICAgICAgYy0+c3RpbWVfbG9jYWxfc3RhbXAgPSBnZXRfc190aW1lKCk7Cj4gICAgICBj LT5zdGltZV9tYXN0ZXJfc3RhbXAgPSByLT5tYXN0ZXJfc3RpbWU7Cj4gIAoKVGhlIHBvaW50IG9m IHRoZSByZW5kZXp2b3VzIGlzIHRvIHJ1biByZHRzYygpIGF0IGEgdGhlIHRpbWUgb24gZWFjaCBj cHUKYXQgdGhlIHNhbWUgdGltZS4gIFdpdGggdGhpcyBsb2dpYywgaXQgc2VlbXMgdGhhdCB5b3Ug ZG9uJ3QgbmVlZCB0aGUKcmVuZGV6dm91cyBhdCBhbGwuCgpBdm9pZGluZyB0aGUgdGltZV9jYWxp YnJhdGlvbl9zdGRfcmVuZGV6dm91cygpIGVudGlyZWx5IGluIHRoaXMKc2l0dWF0aW9uIHdvdWxk IGJlIHRoZSBiZXR0ZXIsIHN1cmVseT8KCn5BbmRyZXcKCl9fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVs QGxpc3RzLnhlbi5vcmcKaHR0cDovL2xpc3RzLnhlbi5vcmcveGVuLWRldmVsCg==