From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jan Beulich" Subject: Re: [PATCH SpectreV1+L1TF v5 6/9] is_control_domain: block speculation Date: Wed, 06 Feb 2019 08:03:00 -0700 Message-ID: <5C5AF7240200007800214562@prv1-mh.provo.novell.com> References: <1548772997-32742-1-git-send-email-nmanthey@amazon.de> <1548772997-32742-7-git-send-email-nmanthey@amazon.de> <5C4ED1D402000078002119E6@prv1-mh.provo.novell.com> <9C03B9BA0200004637554D14@prv1-mh.provo.novell.com> <00FAA7AF020000F8B1E090C7@prv1-mh.provo.novell.com> <010527AF020000F8B1E090C7@prv1-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1grOjF-00029i-B5 for xen-devel@lists.xenproject.org; Wed, 06 Feb 2019 15:03:09 +0000 In-Reply-To: <010527AF020000F8B1E090C7@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: nmanthey@amazon.de Cc: Juergen Gross , Tim Deegan , Stefano Stabellini , Wei Liu , Konrad Rzeszutek Wilk , George Dunlap , Andrew Cooper , Ian Jackson , Dario Faggioli , Martin Pohlack , Julien Grall , David Woodhouse , "Martin Mazein(amazein)" , xen-devel , Julian Stecklina , Bjoern Doebel List-Id: xen-devel@lists.xenproject.org Pj4+IE9uIDI5LjAxLjE5IGF0IDE1OjQzLCA8bm1hbnRoZXlAYW1hem9uLmRlPiB3cm90ZToKPiBA QCAtOTA4LDEwICs5MDksMTAgQEAgdm9pZCB3YXRjaGRvZ19kb21haW5fZGVzdHJveShzdHJ1Y3Qg ZG9tYWluICpkKTsKPiAgICogICAgKHRoYXQgaXMsIHRoaXMgd291bGQgbm90IGJlIHN1aXRhYmxl IGZvciBhIGRyaXZlciBkb21haW4pCj4gICAqICAtIFRoZXJlIGlzIG5ldmVyIGEgcmVhc29uIHRv IGRlbnkgdGhlIGhhcmR3YXJlIGRvbWFpbiBhY2Nlc3MgdG8gdGhpcwo+ICAgKi8KPiAtI2RlZmlu ZSBpc19oYXJkd2FyZV9kb21haW4oX2QpICgoX2QpID09IGhhcmR3YXJlX2RvbWFpbikKPiArI2Rl ZmluZSBpc19oYXJkd2FyZV9kb21haW4oX2QpIGV2YWx1YXRlX25vc3BlYygoX2QpID09IGhhcmR3 YXJlX2RvbWFpbikKPiAgCj4gIC8qIFRoaXMgY2hlY2sgaXMgZm9yIGZ1bmN0aW9uYWxpdHkgc3Bl Y2lmaWMgdG8gYSBjb250cm9sIGRvbWFpbiAqLwo+IC0jZGVmaW5lIGlzX2NvbnRyb2xfZG9tYWlu KF9kKSAoKF9kKS0+aXNfcHJpdmlsZWdlZCkKPiArI2RlZmluZSBpc19jb250cm9sX2RvbWFpbihf ZCkgZXZhbHVhdGVfbm9zcGVjKChfZCktPmlzX3ByaXZpbGVnZWQpCgpJJ20gYWZyYWlkIHRoZXJl J3MgYW5vdGhlciBmbHkgaW4gdGhlIG9pbnRtZW50IGhlcmU6IFdoaWxlIGxvb2tpbmcgYXQKdGhl IHN0aWxsIHF1ZXN0aW9uYWJsZSBncmFudCB0YWJsZSBjaGFuZ2UgSSd2ZSBzdGFydGVkIHdvbmRl cmluZwphYm91dCBjb25zdHJ1Y3RzIGxpa2UKCiAgICBjYXNlIFhFTk1FTV9tYWNocGh5c19tYXBw aW5nOgogICAgewogICAgICAgIHN0cnVjdCB4ZW5fbWFjaHBoeXNfbWFwcGluZyBtYXBwaW5nID0g ewogICAgICAgICAgICAudl9zdGFydCA9IE1BQ0gyUEhZU19WSVJUX1NUQVJULAogICAgICAgICAg ICAudl9lbmQgICA9IE1BQ0gyUEhZU19WSVJUX0VORCwKICAgICAgICAgICAgLm1heF9tZm4gPSBN QUNIMlBIWVNfTlJfRU5UUklFUyAtIDEKICAgICAgICB9OwoKICAgICAgICBpZiAoICFtZW1faG90 cGx1ZyAmJiBpc19oYXJkd2FyZV9kb21haW4oY3VycmVudC0+ZG9tYWluKSApCiAgICAgICAgICAg IG1hcHBpbmcubWF4X21mbiA9IG1heF9wYWdlIC0gMTsKICAgICAgICBpZiAoIGNvcHlfdG9fZ3Vl c3QoYXJnLCAmbWFwcGluZywgMSkgKQogICAgICAgICAgICByZXR1cm4gLUVGQVVMVDsKCiAgICAg ICAgcmV0dXJuIDA7CiAgICB9CgpHcmFudGVkIHRoZSBleGFtcGxlIGhlcmUgY291bGQgYmUgZWFz aWx5IHJlLWFycmFuZ2VkLCBidXQgdGhlcmUKYXJlIG90aGVycyB3aGVyZSB0aGlzIGlzIGxlc3Mg ZWFzeSBvciBub3QgcG9zc2libGUgYXQgYWxsLiBXaGF0IEknbQp0cnlpbmcgdG8gZ2V0IGF0IGFy ZSBjb25zdHJ1Y3RzIHdoZXJlIHRoZSBzdWNoLXByb3RlY3RlZApwcmVkaWNhdGVzIHNpdCBvbiB0 aGUgcmlnaHQgc2lkZSBvZiAmJiBvciB8fCAtIGFmYWljdCAoYWxzbyBmcm9tCmxvb2tpbmcgYXQg c29tZSBtdWNoIHNpbXBsaWZpZWQgY29kZSBleGFtcGxlcykgdGhlIGludGVuZGVkCnByb3RlY3Rp b24gaXMgZ29uZSBpbiB0aGVzZSBjYXNlcy4KCkphbgoKCgpfX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fXwpYZW4tZGV2ZWwgbWFpbGluZyBsaXN0Clhlbi1kZXZl bEBsaXN0cy54ZW5wcm9qZWN0Lm9yZwpodHRwczovL2xpc3RzLnhlbnByb2plY3Qub3JnL21haWxt YW4vbGlzdGluZm8veGVuLWRldmVs