From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AH8x226vYKhvK8+l41YdZbJY9kFmLvKlpPV+wSOZpTGfJirQ85Kzz/EFGbqqa0cdvLZnR8M0IWeb ARC-Seal: i=1; a=rsa-sha256; t=1516821706; cv=none; d=google.com; s=arc-20160816; b=GwvrhFMQ/e8vMFpD0+1jrcrAwbrVLipyma9L7+0j3GMPqH6QHylOIj9BynJI4IR7OF wuLDLZssvuRr44Inco6PDkAt2iUhuaK1Bsja5X+M7OjXzSxuHXS+6D94cBfdCJBFAOoi LLbRSQ4zGcYyVNNZOmkY/t+d0x/3Sy9TPmsZ6Zc4A03CmCmC4MBW7l8HacHygdlm8Nk+ O8d6cHiGIGGC5onX+t7/7xiDmdq8TYmwgsZxIt6r5OBT6VB0oi1epIQCxezq1fjnbto2 r3MSo/acNkU9YRS4VxaMScMbz8hkMdTDlfSr/U+YvytXTfSLKsKhjGEIuldWEb8YTQpe HIOg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:content-language:in-reply-to:mime-version :user-agent:date:message-id:from:references:cc:to:subject :dkim-signature:arc-authentication-results; bh=RTVYulaVmQtOIV2gKo3zjWF+hZx9QnCLWJkwMKz86s4=; b=Z6VLI9Uu7o4i2p4/kv4Pdlp3ebYwNO5EcIypbZjjmmfIVHHlTp8QiN5lHGSGmJWi6G D6teLDj8dgOs+fKP6IPPPJDNHz+5XSEec1s0v87aCBJWzTMAM4KwCaH69KE9J/3Zavz9 HRpiUUmKcQjjlKG2lcs24YiYMeo8kkVnzENa6cvfSz18nIWE1xGnMg2zgckRYi0d1rsU j3EHZmeakSXXQYMRXVzcDXOqn76MkA8pryUlEkaenwp0nrAOvpAv8mXoHQbsp9ROxKf/ PFnoZ94st8H89gCI9pRViv7GLwrwqHBqlEPDknEO2FuwnGWbhVoYGKhADK77eLJE0fog pe/w== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@infradead.org header.s=bombadil.20170209 header.b=lCSny+Kh; spf=pass (google.com: best guess record for domain of rdunlap@infradead.org designates 65.50.211.133 as permitted sender) smtp.mailfrom=rdunlap@infradead.org Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=bombadil.20170209 header.b=lCSny+Kh; spf=pass (google.com: best guess record for domain of rdunlap@infradead.org designates 65.50.211.133 as permitted sender) smtp.mailfrom=rdunlap@infradead.org Subject: Re: [PATCH] Revert "module: Add retpoline tag to VERMAGIC" To: Andi Kleen , Linus Torvalds Cc: Greg Kroah-Hartman , Jiri Kosina , Thomas Gleixner , David Woodhouse , Rusty Russell , "Van De Ven, Arjan" , Jessica Yu , Linux Kernel Mailing List References: <20180124142817.GA23797@kroah.com> <20180124181735.GB26209@tassilo.jf.intel.com> From: Randy Dunlap Message-ID: <72742ccd-febe-7421-dcd1-595959de42e4@infradead.org> Date: Wed, 24 Jan 2018 11:21:33 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 MIME-Version: 1.0 In-Reply-To: <20180124181735.GB26209@tassilo.jf.intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-LABELS: =?utf-8?b?IlxcSW1wb3J0YW50Ig==?= X-GMAIL-THRID: =?utf-8?q?1590489149252174297?= X-GMAIL-MSGID: =?utf-8?q?1590502837347143652?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On 01/24/2018 10:17 AM, Andi Kleen wrote: > diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c > index e4dc26185aa7..9064b20473a7 100644 > --- a/arch/x86/kernel/cpu/bugs.c > +++ b/arch/x86/kernel/cpu/bugs.c > @@ -93,6 +93,18 @@ static const char *spectre_v2_strings[] = { > > static enum spectre_v2_mitigation spectre_v2_enabled = SPECTRE_V2_NONE; > > +/* A module has been loaded. Disable reporting that we're good. */ > +void disable_retpoline(void) > +{ > + spectre_v2_enabled = SPECTRE_V2_NONE; > + pr_err("system may be vunerable to spectre\n"); vulnerable > +} -- ~Randy