From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AH8x224jgmJGoZDCtbF3BJIfnlwfmS2XT36qV3rJ71l5QtXrPZpvU3AEFyxg2KVo7LXTQAPf7wR6 ARC-Seal: i=1; a=rsa-sha256; t=1516545646; cv=none; d=google.com; s=arc-20160816; b=scTYjBSvEK1z8LDnFWhKSI6j2x83j63HUazjU3gOig+g86H6b0kiHoq/ZFHEdLaC/A pXpQV0iQpH+N5j9NLh1wpvLTLAG82UdYpJbptT3f10N1KYFGB1Eakk5vjhqpCxBSHTd6 KoFFUReA14tcNjQ3Rej99Xzwvz0huiTKgML3Gx2hf/uIjgIY2s4Qvze+P2p6H4/ALoEi bedzl2+RtFnle1bDLCh7pVTCZ2jtzXaK67dbJi+1VrkQj04kheBvK2BR1t9PCk0fmD8A +L43ApyXT020sBYTpAbSQDlCeH0McZmrm8MH09S7xe+ErcGnDm+3FEaCfXKF3V9bXsE9 OASA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:precedence:content-language:in-reply-to :mime-version:user-agent:date:message-id:from:references:cc:to :subject:dkim-signature:arc-authentication-results; bh=YkumGh3gRkU0KPIKrdKT9GdYVepnVHW+D7+giMSQSpw=; b=nwRZpptTQuJIduQ3rbjmUAdCm4jeij4fmwJM2/MtQ64pFah1y5BxjhdrhjgbQlBo/G EfHLE8xhJeu3gp+3raHS1B/WTKmYBHFiyJrr8wt551ReuMNExBYWUdauOguN6UwvlIP2 oPir5mm0A6cNazhN6eRWAwMxH5DOIMsB6Tuh9DEyHC3UlU6mhAvLGvRCG4TpoT8NElge 8lSMIVDF6+BZtaqZ5tTm23wJItG8JK+C+Ycuh6dx7I/ezl+Xzjgbe9hIxi/T/bZsCJ6L ESmST8e1YbGQZWbpC8FenULXIVW+72HZYE+Yt8nJBolx72kt8uHM/2MjJZKFZq8frf5Z Os5w== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@amazon.com header.s=amazon201209 header.b=XOfFpM4W; spf=pass (google.com: domain of prvs=552c78f9e=karahmed@amazon.de designates 52.95.49.90 as permitted sender) smtp.mailfrom=prvs=552c78f9e=karahmed@amazon.de; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=amazon.com Authentication-Results: mx.google.com; dkim=pass header.i=@amazon.com header.s=amazon201209 header.b=XOfFpM4W; spf=pass (google.com: domain of prvs=552c78f9e=karahmed@amazon.de designates 52.95.49.90 as permitted sender) smtp.mailfrom=prvs=552c78f9e=karahmed@amazon.de; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=amazon.com X-IronPort-AV: E=Sophos;i="5.46,391,1511827200"; d="scan'208";a="328391971" Subject: Re: [RFC 10/10] x86/enter: Use IBRS on syscall and interrupts To: Konrad Rzeszutek Wilk , KarimAllah Ahmed CC: , Andi Kleen , "Andrea Arcangeli" , Andy Lutomirski , "Arjan van de Ven" , Ashok Raj , Asit Mallick , Borislav Petkov , Dan Williams , Dave Hansen , "David Woodhouse" , Greg Kroah-Hartman , "H . Peter Anvin" , Ingo Molnar , Janakarajan Natarajan , Joerg Roedel , Jun Nakajima , "Laura Abbott" , Linus Torvalds , Masami Hiramatsu , Paolo Bonzini , Peter Zijlstra , =?UTF-8?B?UmFkaW0gS3LEjW3DocWZ?= , Thomas Gleixner , Tim Chen , Tom Lendacky , , , Arjan Van De Ven References: <1516476182-5153-1-git-send-email-karahmed@amazon.de> <1516476182-5153-11-git-send-email-karahmed@amazon.de> <20180121135029.GM10086@char.us.oracle.com> From: KarimAllah Ahmed Message-ID: <243f14f6-940a-65fc-08b8-3fd54dac8c15@amazon.com> Date: Sun, 21 Jan 2018 15:40:12 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.0 MIME-Version: 1.0 In-Reply-To: <20180121135029.GM10086@char.us.oracle.com> Content-Language: en-US X-Originating-IP: [10.43.162.73] X-ClientProxiedBy: EX13D04UWB002.ant.amazon.com (10.43.161.133) To EX13D01EUB003.ant.amazon.com (10.43.166.248) Content-Type: text/plain; charset="utf-8"; format="flowed" Content-Transfer-Encoding: base64 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1590140600098309998?= X-GMAIL-MSGID: =?utf-8?q?1590213368230252775?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: T24gMDEvMjEvMjAxOCAwMjo1MCBQTSwgS29ucmFkIFJ6ZXN6dXRlayBXaWxrIHdyb3RlOgoKPiBP biBTYXQsIEphbiAyMCwgMjAxOCBhdCAwODoyMzowMVBNICswMTAwLCBLYXJpbUFsbGFoIEFobWVk IHdyb3RlOgo+PiBGcm9tOiBUaW0gQ2hlbiA8dGltLmMuY2hlbkBsaW51eC5pbnRlbC5jb20+Cj4+ Cj4+IFN0b3AgSW5kaXJlY3QgQnJhbmNoIFNwZWN1bGF0aW9uIG9uIGV2ZXJ5IHVzZXIgc3BhY2Ug dG8ga2VybmVsIHNwYWNlCj4+IHRyYW5zaXRpb24gYW5kIHJlZW5hYmxlIGl0IHdoZW4gcmV0dXJu aW5nIHRvIHVzZXIgc3BhY2UuLwo+IEhvdyBhYm91dCBpbnRlcnJ1cHRzPwo+Cj4gVGhhdCBpcyBz aG91bGQgLm1hY3JvIGludGVycnVwdCBoYXZlIHRoZSBzYW1lIHRyZWF0bWVudD8KClJFU1RSSUNU X0lCX1NQRUMgaXMgY2FsbGVkIGluIHN3aXRjaF90b190aHJlYWRfc3RhY2sgd2hpY2ggaXMgYWxt b3N0IHRoZSAKZmlyc3QgdGhpbmcgY2FsbGVkIGZyb20gIi5tYWNybyBpbnRlcnJ1cHQiLgoKPgoK QW1hem9uIERldmVsb3BtZW50IENlbnRlciBHZXJtYW55IEdtYkgKQmVybGluIC0gRHJlc2RlbiAt IEFhY2hlbgptYWluIG9mZmljZTogS3JhdXNlbnN0ci4gMzgsIDEwMTE3IEJlcmxpbgpHZXNjaGFl ZnRzZnVlaHJlcjogRHIuIFJhbGYgSGVyYnJpY2gsIENocmlzdGlhbiBTY2hsYWVnZXIKVXN0LUlE OiBERTI4OTIzNzg3OQpFaW5nZXRyYWdlbiBhbSBBbXRzZ2VyaWNodCBDaGFybG90dGVuYnVyZyBI UkIgMTQ5MTczIEIK