From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jan Beulich" Subject: [PATCH 2/5] x86/cpuidle: really use C1 for "urgent" CPUs Date: Thu, 23 May 2019 06:17:41 -0600 Message-ID: <5CE68F650200007800231B38@prv1-mh.provo.novell.com> References: <5CE68CD30200007800231B01@prv1-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1hTmfI-0005fQ-Pt for xen-devel@lists.xenproject.org; Thu, 23 May 2019 12:17:44 +0000 In-Reply-To: <5CE68CD30200007800231B01@prv1-mh.provo.novell.com> Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: xen-devel Cc: Andrew Cooper , Wei Liu , Roger Pau Monne List-Id: xen-devel@lists.xenproject.org Rm9yIG9uZSBvbiByZWNlbnQgQU1EIENQVXMgZW50ZXJpbmcgQzEgKGlmIGF2YWlsYWJsZSBhdCBh bGwpIHJlcXVpcmVzCnVzZSBvZiBNV0FJVCwgd2hpbGUgSExUIChpLmUuIGRlZmF1bHRfaWRsZSgp KSB3b3VsZCBwdXQgdGhlIHByb2Nlc3NvcgppbnRvIGFzIGRlZXAgYXMgQ0M2LiBBbmQgdGhlbiBl dmVuIG9uIG90aGVyIHZlbmRvcnMnIENQVXMgd2Ugc2hvdWxkCmF2b2lkIGVudGVyaW5nIGRlZmF1 bHRfaWRsZSgpIHdoZW4gdGhlIGludGVuZGVkIHN0YXRlIGNhbiBiZSByZWFjaGVkCmJ5IHVzaW5n IHRoZSBhY3RpdmUgaWRsZSBkcml2ZXIncyBmYWNpbGl0aWVzLgoKU2lnbmVkLW9mZi1ieTogSmFu IEJldWxpY2ggPGpiZXVsaWNoQHN1c2UuY29tPgoKLS0tIGEveGVuL2FyY2gveDg2L2FjcGkvY3B1 X2lkbGUuYworKysgYi94ZW4vYXJjaC94ODYvYWNwaS9jcHVfaWRsZS5jCkBAIC01ODAsMTIgKzU4 MCwxNSBAQCBzdGF0aWMgdm9pZCBhY3BpX3Byb2Nlc3Nvcl9pZGxlKHZvaWQpCiAgICAgdTMyIGV4 cCA9IDAsIHByZWQgPSAwOwogICAgIHUzMiBpcnFfdHJhY2VkWzRdID0geyAwIH07CiAKLSAgICBp ZiAoIG1heF9jc3RhdGUgPiAwICYmIHBvd2VyICYmICFzY2hlZF9oYXNfdXJnZW50X3ZjcHUoKSAm JgorICAgIGlmICggbWF4X2NzdGF0ZSA+IDAgJiYgcG93ZXIgJiYKICAgICAgICAgIChuZXh0X3N0 YXRlID0gY3B1aWRsZV9jdXJyZW50X2dvdmVybm9yLT5zZWxlY3QocG93ZXIpKSA+IDAgKQogICAg IHsKKyAgICAgICAgdW5zaWduZWQgaW50IG1heF9zdGF0ZSA9IHNjaGVkX2hhc191cmdlbnRfdmNw dSgpID8gQUNQSV9TVEFURV9DMQorICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgOiBtYXhfY3N0YXRlOworCiAgICAgICAgIGRvIHsKICAgICAg ICAgICAgIGN4ID0gJnBvd2VyLT5zdGF0ZXNbbmV4dF9zdGF0ZV07Ci0gICAgICAgIH0gd2hpbGUg KCBjeC0+dHlwZSA+IG1heF9jc3RhdGUgJiYgLS1uZXh0X3N0YXRlICk7CisgICAgICAgIH0gd2hp bGUgKCBjeC0+dHlwZSA+IG1heF9zdGF0ZSAmJiAtLW5leHRfc3RhdGUgKTsKICAgICAgICAgaWYg KCBuZXh0X3N0YXRlICkKICAgICAgICAgewogICAgICAgICAgICAgaWYgKCBjeC0+dHlwZSA9PSBB Q1BJX1NUQVRFX0MzICYmIHBvd2VyLT5mbGFncy5ibV9jaGVjayAmJgotLS0gYS94ZW4vYXJjaC94 ODYvY3B1L213YWl0LWlkbGUuYworKysgYi94ZW4vYXJjaC94ODYvY3B1L213YWl0LWlkbGUuYwpA QCAtNzI0LDExICs3MjQsMTQgQEAgc3RhdGljIHZvaWQgbXdhaXRfaWRsZSh2b2lkKQogCXU2NCBi ZWZvcmUsIGFmdGVyOwogCXUzMiBleHAgPSAwLCBwcmVkID0gMCwgaXJxX3RyYWNlZFs0XSA9IHsg MCB9OwogCi0JaWYgKG1heF9jc3RhdGUgPiAwICYmIHBvd2VyICYmICFzY2hlZF9oYXNfdXJnZW50 X3ZjcHUoKSAmJgorCWlmIChtYXhfY3N0YXRlID4gMCAmJiBwb3dlciAmJgogCSAgICAobmV4dF9z dGF0ZSA9IGNwdWlkbGVfY3VycmVudF9nb3Zlcm5vci0+c2VsZWN0KHBvd2VyKSkgPiAwKSB7CisJ CXVuc2lnbmVkIGludCBtYXhfc3RhdGUgPSBzY2hlZF9oYXNfdXJnZW50X3ZjcHUoKSA/IEFDUElf U1RBVEVfQzEKKwkJCQkJCQkJIDogbWF4X2NzdGF0ZTsKKwogCQlkbyB7CiAJCQljeCA9ICZwb3dl ci0+c3RhdGVzW25leHRfc3RhdGVdOwotCQl9IHdoaWxlIChjeC0+dHlwZSA+IG1heF9jc3RhdGUg JiYgLS1uZXh0X3N0YXRlKTsKKwkJfSB3aGlsZSAoY3gtPnR5cGUgPiBtYXhfc3RhdGUgJiYgLS1u ZXh0X3N0YXRlKTsKIAkJaWYgKCFuZXh0X3N0YXRlKQogCQkJY3ggPSBOVUxMOwogCQllbHNlIGlm ICh0Yl9pbml0X2RvbmUpCgoKCgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVucHJv amVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL3hl bi1kZXZlbA== From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 096C8C282DD for ; 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Thu, 23 May 2019 12:17:43 +0000 (UTC) Received: from INET-PRV1-MTA by prv1-mh.provo.novell.com with Novell_GroupWise; Thu, 23 May 2019 06:17:43 -0600 Message-Id: <5CE68F650200007800231B38@prv1-mh.provo.novell.com> X-Mailer: Novell GroupWise Internet Agent 18.1.0 Date: Thu, 23 May 2019 06:17:41 -0600 From: "Jan Beulich" To: "xen-devel" References: <5CE68CD30200007800231B01@prv1-mh.provo.novell.com> In-Reply-To: <5CE68CD30200007800231B01@prv1-mh.provo.novell.com> Mime-Version: 1.0 Content-Disposition: inline Subject: [Xen-devel] [PATCH 2/5] x86/cpuidle: really use C1 for "urgent" CPUs X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Andrew Cooper , Wei Liu , Roger Pau Monne Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: base64 Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" Message-ID: <20190523121741.xzcRX3fxUIHTGASfVuyMsWROiNX4PHqDDLSKqdC3Ck0@z> Rm9yIG9uZSBvbiByZWNlbnQgQU1EIENQVXMgZW50ZXJpbmcgQzEgKGlmIGF2YWlsYWJsZSBhdCBh bGwpIHJlcXVpcmVzCnVzZSBvZiBNV0FJVCwgd2hpbGUgSExUIChpLmUuIGRlZmF1bHRfaWRsZSgp KSB3b3VsZCBwdXQgdGhlIHByb2Nlc3NvcgppbnRvIGFzIGRlZXAgYXMgQ0M2LiBBbmQgdGhlbiBl dmVuIG9uIG90aGVyIHZlbmRvcnMnIENQVXMgd2Ugc2hvdWxkCmF2b2lkIGVudGVyaW5nIGRlZmF1 bHRfaWRsZSgpIHdoZW4gdGhlIGludGVuZGVkIHN0YXRlIGNhbiBiZSByZWFjaGVkCmJ5IHVzaW5n IHRoZSBhY3RpdmUgaWRsZSBkcml2ZXIncyBmYWNpbGl0aWVzLgoKU2lnbmVkLW9mZi1ieTogSmFu IEJldWxpY2ggPGpiZXVsaWNoQHN1c2UuY29tPgoKLS0tIGEveGVuL2FyY2gveDg2L2FjcGkvY3B1 X2lkbGUuYworKysgYi94ZW4vYXJjaC94ODYvYWNwaS9jcHVfaWRsZS5jCkBAIC01ODAsMTIgKzU4 MCwxNSBAQCBzdGF0aWMgdm9pZCBhY3BpX3Byb2Nlc3Nvcl9pZGxlKHZvaWQpCiAgICAgdTMyIGV4 cCA9IDAsIHByZWQgPSAwOwogICAgIHUzMiBpcnFfdHJhY2VkWzRdID0geyAwIH07CiAKLSAgICBp ZiAoIG1heF9jc3RhdGUgPiAwICYmIHBvd2VyICYmICFzY2hlZF9oYXNfdXJnZW50X3ZjcHUoKSAm JgorICAgIGlmICggbWF4X2NzdGF0ZSA+IDAgJiYgcG93ZXIgJiYKICAgICAgICAgIChuZXh0X3N0 YXRlID0gY3B1aWRsZV9jdXJyZW50X2dvdmVybm9yLT5zZWxlY3QocG93ZXIpKSA+IDAgKQogICAg IHsKKyAgICAgICAgdW5zaWduZWQgaW50IG1heF9zdGF0ZSA9IHNjaGVkX2hhc191cmdlbnRfdmNw dSgpID8gQUNQSV9TVEFURV9DMQorICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgOiBtYXhfY3N0YXRlOworCiAgICAgICAgIGRvIHsKICAgICAg ICAgICAgIGN4ID0gJnBvd2VyLT5zdGF0ZXNbbmV4dF9zdGF0ZV07Ci0gICAgICAgIH0gd2hpbGUg KCBjeC0+dHlwZSA+IG1heF9jc3RhdGUgJiYgLS1uZXh0X3N0YXRlICk7CisgICAgICAgIH0gd2hp bGUgKCBjeC0+dHlwZSA+IG1heF9zdGF0ZSAmJiAtLW5leHRfc3RhdGUgKTsKICAgICAgICAgaWYg KCBuZXh0X3N0YXRlICkKICAgICAgICAgewogICAgICAgICAgICAgaWYgKCBjeC0+dHlwZSA9PSBB Q1BJX1NUQVRFX0MzICYmIHBvd2VyLT5mbGFncy5ibV9jaGVjayAmJgotLS0gYS94ZW4vYXJjaC94 ODYvY3B1L213YWl0LWlkbGUuYworKysgYi94ZW4vYXJjaC94ODYvY3B1L213YWl0LWlkbGUuYwpA QCAtNzI0LDExICs3MjQsMTQgQEAgc3RhdGljIHZvaWQgbXdhaXRfaWRsZSh2b2lkKQogCXU2NCBi ZWZvcmUsIGFmdGVyOwogCXUzMiBleHAgPSAwLCBwcmVkID0gMCwgaXJxX3RyYWNlZFs0XSA9IHsg MCB9OwogCi0JaWYgKG1heF9jc3RhdGUgPiAwICYmIHBvd2VyICYmICFzY2hlZF9oYXNfdXJnZW50 X3ZjcHUoKSAmJgorCWlmIChtYXhfY3N0YXRlID4gMCAmJiBwb3dlciAmJgogCSAgICAobmV4dF9z dGF0ZSA9IGNwdWlkbGVfY3VycmVudF9nb3Zlcm5vci0+c2VsZWN0KHBvd2VyKSkgPiAwKSB7CisJ CXVuc2lnbmVkIGludCBtYXhfc3RhdGUgPSBzY2hlZF9oYXNfdXJnZW50X3ZjcHUoKSA/IEFDUElf U1RBVEVfQzEKKwkJCQkJCQkJIDogbWF4X2NzdGF0ZTsKKwogCQlkbyB7CiAJCQljeCA9ICZwb3dl ci0+c3RhdGVzW25leHRfc3RhdGVdOwotCQl9IHdoaWxlIChjeC0+dHlwZSA+IG1heF9jc3RhdGUg JiYgLS1uZXh0X3N0YXRlKTsKKwkJfSB3aGlsZSAoY3gtPnR5cGUgPiBtYXhfc3RhdGUgJiYgLS1u ZXh0X3N0YXRlKTsKIAkJaWYgKCFuZXh0X3N0YXRlKQogCQkJY3ggPSBOVUxMOwogCQllbHNlIGlm ICh0Yl9pbml0X2RvbmUpCgoKCgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVucHJv amVjdC5vcmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL3hl bi1kZXZlbA==