From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cooper Subject: [PATCH] x86/cpuid: Avoid unconditionally clobbering ITSC for guests Date: Mon, 16 May 2016 17:59:15 +0100 Message-ID: <1463417955-4258-1-git-send-email-andrew.cooper3@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Xen-devel Cc: Andrew Cooper , Wei Liu , Jan Beulich List-Id: xen-devel@lists.xenproject.org SW4gZ2VuZXJhbCwgSW52YXJpYW50IFRTQyBpcyBub3QgYSBmZWF0dXJlIHdoaWNoIGNhbiBiZSBh ZHZlcnRpc2VkIHRvIGd1ZXN0cywKYmVjYXVzZSBpdCBjYW5ub3QgYmUgZ3VhcmFudGVlZCBhY3Jv c3MgbWlncmF0ZS4gIGRvbWFpbl9jcHVpZCgpIGdvZXMgc28gZmFyIGFzCnRvIGRlbGliZXJhdGVs eSBjbG9iYmVyIHRoZSBmZWF0dXJlIGZsYWcgdW5kZXIgYSBudW1iZXIgb2YgY2lyY3Vtc3RhbmNl cy4KCkJlY2F1c2UgSVRTQyBpcyBhYnNlbnQgZnJvbSB0aGUgc3RhdGljIHtwdixodm19X2ZlYXR1 cmVzZXQgbWFza3MsIGMvcyBiNjQ4ZmVmZgoieGVuL3g4NjogSW1wcm92ZW1lbnRzIHRvIGluLWh5 cGVydmlzb3IgY3B1aWQgc2FuaXR5IGNoZWNrcyIgY2F1c2VkIElUU0MgdG8gYmUKdW5jb25kaXRp b25hbGx5IG1hc2tlZCBvdXQuCgpBcyBhbiBpbnRlcmltIHNvbHV0aW9uLCBpbmNsdWRlIHRoZSBo b3N0cyBpZGVhIG9mIElUU0MgYWxvbmcgd2l0aCB0aGUgc3RhdGljCntwdixodm19X2ZlYXR1cmVz ZXQgd2hlbiByZXN0cmljdGluZyB0aGUgZ3Vlc3RzIHZpZXcgb2YgZmVhdHVyZXMuICBUaGlzIGNh dXNlcwp0aGUgaGFyZHdhcmUgZG9tYWluLCBhbmQgVk1zIGV4cGxpY2l0bHkgY29uZmlndXJlZCB3 aXRoIElUU0MgYW5kIG5vLW1pZ3JhdGUgdG8KYmUgb2ZmZXJlZCBJVFNDIChzdWJqZWN0IHRvIGhh cmR3YXJlIGF2YWlsYWJpbGl0eSkuCgpTaWduZWQtb2ZmLWJ5OiBBbmRyZXcgQ29vcGVyIDxhbmRy ZXcuY29vcGVyM0BjaXRyaXguY29tPgotLS0KQ0M6IEphbiBCZXVsaWNoIDxKQmV1bGljaEBzdXNl LmNvbT4KQ0M6IFdlaSBMaXUgPHdlaS5saXUyQGNpdHJpeC5jb20+Ci0tLQogeGVuL2FyY2gveDg2 L2h2bS9odm0uYyB8IDMgKystCiB4ZW4vYXJjaC94ODYvdHJhcHMuYyAgIHwgMyArKy0KIDIgZmls ZXMgY2hhbmdlZCwgNCBpbnNlcnRpb25zKCspLCAyIGRlbGV0aW9ucygtKQoKZGlmZiAtLWdpdCBh L3hlbi9hcmNoL3g4Ni9odm0vaHZtLmMgYi94ZW4vYXJjaC94ODYvaHZtL2h2bS5jCmluZGV4IDc0 OTIwMzAuLjUwNDBhNWMgMTAwNjQ0Ci0tLSBhL3hlbi9hcmNoL3g4Ni9odm0vaHZtLmMKKysrIGIv eGVuL2FyY2gveDg2L2h2bS9odm0uYwpAQCAtMzUwOSw3ICszNTA5LDggQEAgdm9pZCBodm1fY3B1 aWQodW5zaWduZWQgaW50IGlucHV0LCB1bnNpZ25lZCBpbnQgKmVheCwgdW5zaWduZWQgaW50ICpl YngsCiAgICAgICAgIGJyZWFrOwogCiAgICAgY2FzZSAweDgwMDAwMDA3OgotICAgICAgICAqZWR4 ICY9IGh2bV9mZWF0dXJlc2V0W0ZFQVRVUkVTRVRfZTdkXTsKKyAgICAgICAgKmVkeCAmPSAoaHZt X2ZlYXR1cmVzZXRbRkVBVFVSRVNFVF9lN2RdIHwKKyAgICAgICAgICAgICAgICAgKGhvc3RfZmVh dHVyZXNldFtGRUFUVVJFU0VUX2U3ZF0gJiBjcHVmZWF0X21hc2soWDg2X0ZFQVRVUkVfSVRTQykp KTsKICAgICAgICAgYnJlYWs7CiAKICAgICBjYXNlIDB4ODAwMDAwMDg6CmRpZmYgLS1naXQgYS94 ZW4vYXJjaC94ODYvdHJhcHMuYyBiL3hlbi9hcmNoL3g4Ni90cmFwcy5jCmluZGV4IDAwNTJhYjgu LjFlZjg0MDEgMTAwNjQ0Ci0tLSBhL3hlbi9hcmNoL3g4Ni90cmFwcy5jCisrKyBiL3hlbi9hcmNo L3g4Ni90cmFwcy5jCkBAIC0xMTQyLDcgKzExNDIsOCBAQCB2b2lkIHB2X2NwdWlkKHN0cnVjdCBj cHVfdXNlcl9yZWdzICpyZWdzKQogICAgICAgICBicmVhazsKIAogICAgIGNhc2UgMHg4MDAwMDAw NzoKLSAgICAgICAgZCAmPSBwdl9mZWF0dXJlc2V0W0ZFQVRVUkVTRVRfZTdkXTsKKyAgICAgICAg ZCAmPSAocHZfZmVhdHVyZXNldFtGRUFUVVJFU0VUX2U3ZF0gfAorICAgICAgICAgICAgICAoaG9z dF9mZWF0dXJlc2V0W0ZFQVRVUkVTRVRfZTdkXSAmIGNwdWZlYXRfbWFzayhYODZfRkVBVFVSRV9J VFNDKSkpOwogICAgICAgICBicmVhazsKIAogICAgIGNhc2UgMHg4MDAwMDAwODoKLS0gCjIuMS40 CgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWRl dmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVuLm9yZwpodHRwOi8vbGlzdHMueGVu Lm9yZy94ZW4tZGV2ZWwK