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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A14CEC433F5 for ; Tue, 5 Oct 2021 15:24:14 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6F4A161165 for ; Tue, 5 Oct 2021 15:24:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 6F4A161165 Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=aupiZGUt88myAb102FeSejVzLmqX4h0z1NB9QWIctgc=; b=qrtg9nFnspj7wx wQkeuEPtjt5V7irMOwbYaHGh1hI+QXHSqU9Np2lyPL/IEmd0Y8fE9bFhA5ZmNiPufqXnSIjA26wA3 KWvU3/vnyy+T5ANpXdDROH1VN0FaDqLEO3qguoOsRBagpSHBJzvEUiIpFVkg0rHmCbkKvek3sYb7P 4GMZjaVQHelaKOYjDKBVD3RCUheKmTCxZHwYfXRpCtOtcu7rPEb01nEpKXchQNnukOPn74TCRxaoM XQv3BVUf0ePv3kK+4GZ4o+Ofz+4qCNjKQnenFZQzRfcAqpx1UShKIed8sSmoxf9ZfXRyF4BSMJPuR +H1WYXhvJ3MDactNDGNA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mXmHI-00B35m-IY; Tue, 05 Oct 2021 15:22:48 +0000 Received: from mail-pf1-x42b.google.com ([2607:f8b0:4864:20::42b]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mXmHE-00B358-Iy for linux-arm-kernel@lists.infradead.org; Tue, 05 Oct 2021 15:22:45 +0000 Received: by mail-pf1-x42b.google.com with SMTP id s16so17754202pfk.0 for ; Tue, 05 Oct 2021 08:22:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:content-transfer-encoding:in-reply-to; bh=jsoEJt9R8crAH2RcsfBnQLCdcmXo4iVFPCHH8skN9hQ=; b=Ed27JI5WdcMBjzCmHglgYbPkFapHRW8VivzST0erYb/L/PV6Fx0rpTBNDt1223jRVb eQ5IVgSRDi5VCqGDiJM5A7rbcPMvwg6w1jg0wDhDNxogy7g8tXHb5gAQu3MkQZ4aTk9Q D+35shvAdiTeBDH9W72MNR7F3tUnMUT8t+zTm8lCHdonVdqfrCyFpDQ97vP6AwGRNn/X GOqBrTVYIjZiBhdOV7etEqYr4+lx5qlCy7z4mzvugVDQwWWAnXWWM9Dac9u4kMeqF4o0 q66/1KN+gVVuBQ71H+9jz7Qi8kNlcIq5g+ueK+T83d6rxeradLUvtNWie9PUJyUcAjyk VesA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:content-transfer-encoding :in-reply-to; bh=jsoEJt9R8crAH2RcsfBnQLCdcmXo4iVFPCHH8skN9hQ=; b=doQtP13rqGQIQCyVZiYJdokmlqF06OtIMBWbDJmAbaSS7wwPDMoNYULBgGmWqw1gl6 mLmzdpy1fSjw22CVUrtOisJNrj+aZqMKmpgxrKvofTmNfUs8aZ10QWgYtzlSh9odXnxY pESUyvyhAbI1Ke1w6ilhbkoED/vla6dVm84E6O18jfuTudA/p6KabQeXUSeEjVJmsglT T1+PbHSxxWjEF04spiBJpu5+1JELYp4hEeYTT4p1iIbSnxgkGX5KoeePgoQXObjxconW ItFfZqhPB8IZT0f7FAYUye5jaby4C0H2AzfysLnPYgwg0mb0WIjcyZxSuRzs4aireNfM jG2A== X-Gm-Message-State: AOAM530b2bWvgRLoi05tdEtuz+UN9RyFBC6x9ZwE1cfyoXukY2lx4utb o0dRkaK+K395qTUq6wjm00htYQ== X-Google-Smtp-Source: ABdhPJyd+BrY951cMRvWU+Hdnw02yUD1081dLTCog2uFgukEdDRDWflW+t6MGsO3nWUcqCgRuybMcw== X-Received: by 2002:a62:b50d:0:b0:44b:b81f:a956 with SMTP id y13-20020a62b50d000000b0044bb81fa956mr30655368pfe.27.1633447363159; Tue, 05 Oct 2021 08:22:43 -0700 (PDT) Received: from google.com (157.214.185.35.bc.googleusercontent.com. [35.185.214.157]) by smtp.gmail.com with ESMTPSA id z2sm6907837pfe.210.2021.10.05.08.22.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 05 Oct 2021 08:22:42 -0700 (PDT) Date: Tue, 5 Oct 2021 15:22:39 +0000 From: Sean Christopherson To: Oliver Upton Cc: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, Paolo Bonzini , Marc Zyngier , Peter Shier , Jim Mattson , David Matlack , Ricardo Koller , Jing Zhang , Raghavendra Rao Anata , James Morse , Alexandru Elisei , Suzuki K Poulose , linux-arm-kernel@lists.infradead.org, Andrew Jones , Will Deacon , Catalin Marinas Subject: Re: [PATCH v8 7/7] KVM: x86: Expose TSC offset controls to userspace Message-ID: References: <20210916181538.968978-1-oupton@google.com> <20210916181538.968978-8-oupton@google.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210916181538.968978-8-oupton@google.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211005_082244_650882_FD3E7CBD X-CRM114-Status: GOOD ( 12.31 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gVGh1LCBTZXAgMTYsIDIwMjEsIE9saXZlciBVcHRvbiB3cm90ZToKPiArc3RhdGljIGludCBr dm1fYXJjaF90c2NfZ2V0X2F0dHIoc3RydWN0IGt2bV92Y3B1ICp2Y3B1LAo+ICsJCQkJIHN0cnVj dCBrdm1fZGV2aWNlX2F0dHIgKmF0dHIpCj4gK3sKPiArCXU2NCBfX3VzZXIgKnVhZGRyID0gKHU2 NCBfX3VzZXIgKilhdHRyLT5hZGRyOwoKLi4uCgo+ICtzdGF0aWMgaW50IGt2bV9hcmNoX3RzY19z ZXRfYXR0cihzdHJ1Y3Qga3ZtX3ZjcHUgKnZjcHUsCj4gKwkJCQkgc3RydWN0IGt2bV9kZXZpY2Vf YXR0ciAqYXR0cikKPiArewo+ICsJdTY0IF9fdXNlciAqdWFkZHIgPSAodTY0IF9fdXNlciAqKWF0 dHItPmFkZHI7CgpUaGVzZSBjYXN0cyBicmVhayAzMi1iaXQgYnVpbGRzIGJlY2F1c2Ugb2YgdHJ1 bmNhdGluZyBhdHRyLT5hZGRyIGZyb20gNjQtYml0IGludAp0byBhIDMyLWJpdCBwb2ludGVyLiAg VGhlIGFkZHJlc3Mgc2hvdWxkIGFsc28gYmUgY2hlY2tlZCB0byB2ZXJpZnkgYml0cyA2MzozMiBh cmUKbm90IHNldCBvbiAzMi1iaXQga2VybmVscy4KCmFyY2gveDg2L2t2bS94ODYuYzogSW4gZnVu Y3Rpb24g4oCYa3ZtX2FyY2hfdHNjX2dldF9hdHRy4oCZOgphcmNoL3g4Ni9rdm0veDg2LmM6NDk0 NzoyMjogZXJyb3I6IGNhc3QgdG8gcG9pbnRlciBmcm9tIGludGVnZXIgb2YgZGlmZmVyZW50IHNp emUgWy1XZXJyb3I9aW50LXRvLXBvaW50ZXItY2FzdF0KIDQ5NDcgfCAgdTY0IF9fdXNlciAqdWFk ZHIgPSAodTY0IF9fdXNlciAqKWF0dHItPmFkZHI7CiAgICAgIHwgICAgICAgICAgICAgICAgICAg ICAgXgphcmNoL3g4Ni9rdm0veDg2LmM6IEluIGZ1bmN0aW9uIOKAmGt2bV9hcmNoX3RzY19zZXRf YXR0cuKAmToKYXJjaC94ODYva3ZtL3g4Ni5jOjQ5Njc6MjI6IGVycm9yOiBjYXN0IHRvIHBvaW50 ZXIgZnJvbSBpbnRlZ2VyIG9mIGRpZmZlcmVudCBzaXplIFstV2Vycm9yPWludC10by1wb2ludGVy LWNhc3RdCiA0OTY3IHwgIHU2NCBfX3VzZXIgKnVhZGRyID0gKHU2NCBfX3VzZXIgKilhdHRyLT5h ZGRyOwogICAgICB8ICAgICAgICAgICAgICAgICAgICAgIF4KCgpOb3Qgc3VyZSBpZiB0aGVyZSdz IGEgbW9yZSBlbGVnYW50IGFwcHJvYWNoIHRoYW4gY2FzdHMgZ2Fsb3JlPwoKZGlmZiAtLWdpdCBh L2FyY2gveDg2L2t2bS94ODYuYyBiL2FyY2gveDg2L2t2bS94ODYuYwppbmRleCA4ZTVlNDYyZmZk NjUuLjM5MzBlNWRjZGYwZSAxMDA2NDQKLS0tIGEvYXJjaC94ODYva3ZtL3g4Ni5jCisrKyBiL2Fy Y2gveDg2L2t2bS94ODYuYwpAQCAtNDk0NCw5ICs0OTQ0LDEyIEBAIHN0YXRpYyBpbnQga3ZtX2Fy Y2hfdHNjX2hhc19hdHRyKHN0cnVjdCBrdm1fdmNwdSAqdmNwdSwKIHN0YXRpYyBpbnQga3ZtX2Fy Y2hfdHNjX2dldF9hdHRyKHN0cnVjdCBrdm1fdmNwdSAqdmNwdSwKICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgc3RydWN0IGt2bV9kZXZpY2VfYXR0ciAqYXR0cikKIHsKLSAgICAgICB1 NjQgX191c2VyICp1YWRkciA9ICh1NjQgX191c2VyICopYXR0ci0+YWRkcjsKKyAgICAgICB1NjQg X191c2VyICp1YWRkciA9ICh1NjQgX191c2VyICopKHVuc2lnbmVkIGxvbmcpYXR0ci0+YWRkcjsK ICAgICAgICBpbnQgcjsKCisgICAgICAgaWYgKCh1NjQpKHVuc2lnbmVkIGxvbmcpdWFkZHIgIT0g YXR0ci0+YWRkcikKKyAgICAgICAgICAgICAgIHJldHVybiAtRUZBVUxUOworCiAgICAgICAgc3dp dGNoIChhdHRyLT5hdHRyKSB7CiAgICAgICAgY2FzZSBLVk1fVkNQVV9UU0NfT0ZGU0VUOgogICAg ICAgICAgICAgICAgciA9IC1FRkFVTFQ7CkBAIC00OTY0LDEwICs0OTY3LDEzIEBAIHN0YXRpYyBp bnQga3ZtX2FyY2hfdHNjX2dldF9hdHRyKHN0cnVjdCBrdm1fdmNwdSAqdmNwdSwKIHN0YXRpYyBp bnQga3ZtX2FyY2hfdHNjX3NldF9hdHRyKHN0cnVjdCBrdm1fdmNwdSAqdmNwdSwKICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgc3RydWN0IGt2bV9kZXZpY2VfYXR0ciAqYXR0cikKIHsK LSAgICAgICB1NjQgX191c2VyICp1YWRkciA9ICh1NjQgX191c2VyICopYXR0ci0+YWRkcjsKKyAg ICAgICB1NjQgX191c2VyICp1YWRkciA9ICh1NjQgX191c2VyICopKHVuc2lnbmVkIGxvbmcpYXR0 ci0+YWRkcjsKICAgICAgICBzdHJ1Y3Qga3ZtICprdm0gPSB2Y3B1LT5rdm07CiAgICAgICAgaW50 IHI7CgorICAgICAgIGlmICgodTY0KSh1bnNpZ25lZCBsb25nKXVhZGRyICE9IGF0dHItPmFkZHIp CisgICAgICAgICAgICAgICByZXR1cm4gLUVGQVVMVDsKKwogICAgICAgIHN3aXRjaCAoYXR0ci0+ YXR0cikgewogICAgICAgIGNhc2UgS1ZNX1ZDUFVfVFNDX09GRlNFVDogewogICAgICAgICAgICAg ICAgdTY0IG9mZnNldCwgdHNjLCBuczsKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fCmxpbnV4LWFybS1rZXJuZWwgbWFpbGluZyBsaXN0CmxpbnV4LWFybS1r ZXJuZWxAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWls bWFuL2xpc3RpbmZvL2xpbnV4LWFybS1rZXJuZWwK