From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AH8x227T0vK+hn4rIowO7UdeA/60I9Uv+1mLI/nsUC6ThwfbLhlbbucd8KvuQrY4m+76QCmXu3jG ARC-Seal: i=1; a=rsa-sha256; t=1516485441; cv=none; d=google.com; s=arc-20160816; b=jsT88mUTK5bGt7DhewpNUVFBQmQCs4hAju0BBNS0LNAUfAwtBiBldJbjWQbTQyHZfd vqtEBh9xEwYMDpziS9d7QLsNGse5O2vucWS4hL4Bb8rCZDyxw5nM+sDIxv1kRfz77lBa Gsm1+25iMO0mDZ9Lmh5yTk3PCjcK4iYU7/fN5YT+raFcUypE9LhfQri8JqN56+oyuq5d U8XX0EcdGXSJdw2MVYcZ3tFMKav/ssUsAbRtL4mRIg7NghnGdMDVMXbNQ5DRRohTt2ZQ X76Z2vzH7q3EwDReXE93mLAQXFkbxGrcU7/3+idwem9re0ChrXKLtjWuAD/XV9ZkcVW0 rJUg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:date:face:references:in-reply-to:cc:to:from:subject :message-id:dkim-signature:arc-authentication-results; bh=BvllFihr3JYYo4Oi8Q+UxyeA0ncZSM1yUeZq1qTrElg=; b=t7M9YBHB1vVJaOgwqZ85AQAVfZSwYtztqnYXntkEr0sV6kmuAKYVCsjWtcEZ3bgWFu /YHVk18aVAJIjwZ92aunjWDHKZaIV4re0B5Ich3HCsyFxMa5jV85r4GDT7pF2ysKNgfl d0vklchvIm37ZfvNQA8XWtoDFrBBFwCFLZ1rSM2jr93zVMQ/8WT+mDZezlRSOYrkW4Ov igYVjsb7xB/qQ2toYaDlfww8bP25JZm55C5trBEpqpA2LZxsZ5dCCxapyZPbXx7y2gyC PPXIFFR9BtcyN+w+Qut1N+qvUtKpuzfOIXjgDR9ArdmSuhM9cWVNA1pFuyLZo4ggFfGz 9Lew== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@infradead.org header.s=twosheds.20170209 header.b=QkYTwU51; spf=pass (google.com: best guess record for domain of batv+cee44ae395e655471291+5263+infradead.org+dwmw2@twosheds.srs.infradead.org designates 2001:8b0:10b:1:21d:7dff:fe04:dbe2 as permitted sender) smtp.mailfrom=BATV+cee44ae395e655471291+5263+infradead.org+dwmw2@twosheds.srs.infradead.org Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=twosheds.20170209 header.b=QkYTwU51; spf=pass (google.com: best guess record for domain of batv+cee44ae395e655471291+5263+infradead.org+dwmw2@twosheds.srs.infradead.org designates 2001:8b0:10b:1:21d:7dff:fe04:dbe2 as permitted sender) smtp.mailfrom=BATV+cee44ae395e655471291+5263+infradead.org+dwmw2@twosheds.srs.infradead.org Message-ID: <1516485420.9814.20.camel@infradead.org> Subject: Re: [PATCH 1/4] x86/cpufeatures: Add Intel feature bits for Speculation Control From: David Woodhouse To: Steven Noonan Cc: Arjan van de Ven , Thomas Gleixner , karahmed@amazon.de, Linux-X86 , Linux Kernel mailing List , tim.c.chen@linux.intel.com, Borislav Petkov , Peter Zijlstra , Paolo Bonzini , ak@linux.intel.com, Linus Torvalds , gregkh@linux-foundation.org In-Reply-To: References: <1516449813-7654-1-git-send-email-dwmw@amazon.co.uk> <1516449813-7654-2-git-send-email-dwmw@amazon.co.uk> Face: 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 Content-Type: multipart/signed; micalg="sha-256"; protocol="application/x-pkcs7-signature"; boundary="=-fGp+bs1PEMXJzUXT3onM" Date: Sat, 20 Jan 2018 21:57:00 +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 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1590114213169258479?= X-GMAIL-MSGID: =?utf-8?q?1590150238265681177?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: --=-fGp+bs1PEMXJzUXT3onM Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Sat, 2018-01-20 at 13:51 -0800, Steven Noonan wrote: >=20 > > +#define X86_FEATURE_STIPB=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 (18*32+27) /* Speculation > Control with STIPB (Intel) */ >=20 > Is this correct? I thought the acronym was "STIBP", i.e. > "Single-Thread Indrect Branch Prediction"? If so, then you've got the > B and P swapped. Likewise in the later MSR bits patch where I actually have both 'STIPB' and 'Single Thread Indirect Branch Predictors' on the *same* line. 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