From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932112AbeBKTZ1 (ORCPT ); Sun, 11 Feb 2018 14:25:27 -0500 Received: from twosheds.infradead.org ([90.155.92.209]:46228 "EHLO twosheds.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753609AbeBKTZZ (ORCPT ); Sun, 11 Feb 2018 14:25:25 -0500 Message-ID: <1518377119.6606.2.camel@infradead.org> Subject: Re: [PATCH] x86/speculation: Clean up various Spectre related details From: David Woodhouse To: Ingo Molnar Cc: x86@kernel.org, linux-kernel@vger.kernel.org, tglx@linutronix.de, karahmed@amazon.de, sironi@amazon.de, kvm@vger.kernel.org, torvalds@linux-foundation.org, pbonzini@redhat.com, bp@alien8.de, peterz@infradead.org, jmattson@google.com, rkrcmar@redhat.com, arjan.van.de.ven@intel.com, dave.hansen@intel.com In-Reply-To: <20180211185057.rest4bf2ydx7slrk@gmail.com> References: <1518305967-31356-1-git-send-email-dwmw@amazon.co.uk> <1518362359-1005-1-git-send-email-dwmw@amazon.co.uk> <20180211185057.rest4bf2ydx7slrk@gmail.com> Face: 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 Content-Type: multipart/signed; micalg="sha-256"; protocol="application/x-pkcs7-signature"; boundary="=-nKDGK7uVKH1JkOongI+b" Date: Sun, 11 Feb 2018 19:25:19 +0000 Mime-Version: 1.0 X-Mailer: Evolution 3.18.5.2-0ubuntu3.2 X-SRS-Rewrite: SMTP reverse-path rewritten from by twosheds.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --=-nKDGK7uVKH1JkOongI+b Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Sun, 2018-02-11 at 19:50 +0100, Ingo Molnar wrote: >=20 > From 82c2b2f29691143a05181333f387e786646aa28b Mon Sep 17 00:00:00 2001 > From: Ingo Molnar > Date: Sat, 10 Feb 2018 11:51:57 +0100 > Subject: [PATCH] x86/speculation: Clean up various Spectre related detail= s >=20 > Harmonize all the Spectre messages so that a: >=20 > =C2=A0=C2=A0=C2=A0 dmesg | grep -i spectre >=20 > ... gives us most Spectre related kernel boot messages. >=20 > Also fix a few other details: >=20 > =C2=A0- clarify a comment about firmware speculation control >=20 > =C2=A0- s/KPTI/PTI >=20 > =C2=A0- remove various line-breaks that made the code uglier >=20 > Cc: Andy Lutomirski > Cc: Arjan van de Ven > Cc: Borislav Petkov > Cc: Dan Williams > Cc: Dave Hansen > Cc: David Woodhouse > Cc: David Woodhouse > Cc: Greg Kroah-Hartman > Cc: Josh Poimboeuf > Cc: Linus Torvalds > Cc: Peter Zijlstra > Cc: Thomas Gleixner > Signed-off-by: Ingo Molnar Acked-by: David Woodhouse with a couple of comments: -=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0* If neither SMEP or KPTI = are available, there is a risk of +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0* If neither SMEP or PTI a= re available, there is a risk of Make that 'neither SMEP nor PTI' while you're at it though please; that's bugged me a couple of times in passing. And should these say 'Spectre v2' not just 'Spectre'? --=-nKDGK7uVKH1JkOongI+b Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCCEFQw ggUxMIIEGaADAgECAhBNRhEyk/HZ7naOeTHWrzuAMA0GCSqGSIb3DQEBCwUAMIGXMQswCQYDVQQG EwJHQjEbMBkGA1UECBMSR3JlYXRlciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdTYWxmb3JkMRowGAYD VQQKExFDT01PRE8gQ0EgTGltaXRlZDE9MDsGA1UEAxM0Q09NT0RPIFJTQSBDbGllbnQgQXV0aGVu dGljYXRpb24gYW5kIFNlY3VyZSBFbWFpbCBDQTAeFw0xNzEyMjEwMDAwMDBaFw0xODEyMjEyMzU5 NTlaMCQxIjAgBgkqhkiG9w0BCQEWE2R3bXcyQGluZnJhZGVhZC5vcmcwggEiMA0GCSqGSIb3DQEB AQUAA4IBDwAwggEKAoIBAQDgzLNWa18DNpGUj/ZeH0Sgz53ESIbzdPw3OJeuNP6jZhxZojbyfxbM hETscxI/Hj6UZ4a7sHm5BkVjlsB1Af2Za/PXUt8MmLAcPMHkMPGunvkUibEvblDvpqMkQZlaZM+t 5PqFmWkbehLaEvbpNY7dmEAAeKh4klTzJzrr5AAzaCQ32cA2e3+DEIv5O5l9ViMIjy/JM+xMQrfX 3PZ0chY1PaVWjg59d4Uno+5LRDbgCnPkKJX4ysBGadibjBGQGJEZCjh94iiEebn2KsRLvtrJ72Ph 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