From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AH8x227PPrViYAcyMA6ZkDASPPS6T8flQcfk5wo4/4uTb5sNhLc1aYwKFSV91RPpGbdPAyDO+o2e ARC-Seal: i=1; a=rsa-sha256; t=1516628276; cv=none; d=google.com; s=arc-20160816; b=N7mt93cXaAHNDoGdqWwcgBpG6HDphIS69kRrgzJ47sCadeMeNMSSSwkzrfOs+SsUYD /rdRSJd7YR0zX56ZAj8dYbAld4Fj+44L/EOY+P5qfRei+KuRgBh4JOmPaIisT11KKpdV wr/75Be+9I4onPAkTwoL/O/FaARnfjI3mC9CXWCEnRKjzGdh40dhDKyEudtmZt7gMoKI xf6evsl15Pue42izT+cIzo7Mtxyz1/C19pcEGhcjoMwJOXyTSNvI3Bt3TdscPtbYAJ2z srYs5iTZCPiE9wgfSjcxHSdiL/jxCHfvsgmJkAVyq1UgBqpFPd2AvHpUWPNw/vickwrK GfXQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=precedence:mime-version:accept-language:in-reply-to:references :message-id:date:thread-index:thread-topic:subject:cc:to:from :mime-version:dkim-signature:arc-authentication-results; bh=BqSm/QmcBZTlrgS/RKwcBYgoGym85hGu4UKFP+3yB2w=; b=kLNVdhk2jaQZXw6CV16lafMtCG6zW/3sPFD0NmaFDrdZZyejsqZjTyZAWUEma7k4TM C3Pk5VT/CGURZFOpbt+nt6H7N1RfaM+tVAJlBEC7iWxtWerYiyZz71XLncgn+KQyPthJ 9D8mm/H+qtAqhWi8SfpdEGFz1dumKbSDwagVJ8aUzP9tdesxJuAMEm4w4IZM3RT4mYg5 +TwsMo1JIVhMoJSfAFkHrhHbfsPmI0oTWRsyZmlU4F3Et7tQ9VJneZfYidJ5NJXgq5cO 22dvKDYuMN2T6lidJvy+JRSyhoc6bz1d3NJH331v8RU8ft7MmXoKVgHQ1IA37SR7YN+f ZV2w== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@amazon.co.uk header.s=amazon201209 header.b=Ug4FaTOS; spf=pass (google.com: domain of prvs=5536251c0=dwmw@amazon.co.uk designates 207.171.190.10 as permitted sender) smtp.mailfrom=prvs=5536251c0=dwmw@amazon.co.uk; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=amazon.co.uk Authentication-Results: mx.google.com; dkim=pass header.i=@amazon.co.uk header.s=amazon201209 header.b=Ug4FaTOS; spf=pass (google.com: domain of prvs=5536251c0=dwmw@amazon.co.uk designates 207.171.190.10 as permitted sender) smtp.mailfrom=prvs=5536251c0=dwmw@amazon.co.uk; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=amazon.co.uk X-Amazon-filename: smime.p7s X-IronPort-AV: E=Sophos;i="5.46,396,1511827200"; d="p7s'?scan'208";a="716664613" Content-Type: multipart/mixed; boundary="===============1558385695474078982==" MIME-Version: 1.0 From: "Woodhouse, David" To: "gregkh@linuxfoundation.org" , "bp@suse.de" CC: "kvm@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "peterz@infradead.org" , "arjan@linux.intel.com" , "Raslan, KarimAllah" , "ashok.raj@intel.com" , "tglx@linutronix.de" , "Janakarajan.Natarajan@amd.com" , "tim.c.chen@linux.intel.com" , "ak@linux.intel.com" , "joro@8bytes.org" , "dan.j.williams@intel.com" , "x86@kernel.org" , "hpa@zytor.com" , "aarcange@redhat.com" , "mingo@redhat.com" , "luto@kernel.org" , "torvalds@linux-foundation.org" , "pbonzini@redhat.com" , "dave.hansen@intel.com" , "mhiramat@kernel.org" , "thomas.lendacky@amd.com" , "asit.k.mallick@intel.com" , "jun.nakajima@intel.com" , "labbott@redhat.com" , "rkrcmar@redhat.com" Subject: Re: [RFC 05/10] x86/speculation: Add basic IBRS support infrastructure Thread-Topic: [RFC 05/10] x86/speculation: Add basic IBRS support infrastructure Thread-Index: AQHTkiQyaetWGqbnzUaIMY+KXil5QqN+ZMMAgAAHHICAAT0bgIAAJY4AgAAXdgCAAAHhgA== Date: Mon, 22 Jan 2018 13:37:00 +0000 Message-ID: <1516628219.9814.160.camel@amazon.co.uk> References: <1516476182-5153-1-git-send-email-karahmed@amazon.de> <1516476182-5153-6-git-send-email-karahmed@amazon.de> <20180121145655.ddme3w6kzxthu6al@pd.tnic> <20180122095153.GB2228@hirez.programming.kicks-ass.net> <20180122120617.32jwptg6it32p4do@pd.tnic> <20180122133016.GC3829@kroah.com> In-Reply-To: <20180122133016.GC3829@kroah.com> Accept-Language: en-GB, en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.43.60.116] MIME-Version: 1.0 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1590140581449802182?= X-GMAIL-MSGID: =?utf-8?q?1590300011626368958?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: --===============1558385695474078982== Content-Language: en-US Content-Type: multipart/signed; micalg=sha-256; protocol="application/x-pkcs7-signature"; boundary="=-1QneJguM+XbeSmQ6E51Q" --=-1QneJguM+XbeSmQ6E51Q Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Mon, 2018-01-22 at 14:30 +0100, Greg Kroah-Hartman wrote: > We kind of do, you can submit patches to UEFI, but I doubt that the > processor-specific portions are actually present in the Tianocore code > to be able to be patched. This is just about which microcode your BIOS loads into the CPU before booting the OS. It's not "process-specific portions in the Tianocore code"; more a data blob =E2=80=94 just like when Linux updates microcode. > What about LinuxBoot , does it too take over too > late in the boot process to control this? Yes, I believe microcode updates are done in PEI which is before LinuxBoot takes over. --=-1QneJguM+XbeSmQ6E51Q Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCCEE4w ggUuMIIEFqADAgECAhEApEtL31g6H7ROXdOiQnA9RjANBgkqhkiG9w0BAQsFADCBlzELMAkGA1UE BhMCR0IxGzAZBgNVBAgTEkdyZWF0ZXIgTWFuY2hlc3RlcjEQMA4GA1UEBxMHU2FsZm9yZDEaMBgG A1UEChMRQ09NT0RPIENBIExpbWl0ZWQxPTA7BgNVBAMTNENPTU9ETyBSU0EgQ2xpZW50IEF1dGhl bnRpY2F0aW9uIGFuZCBTZWN1cmUgRW1haWwgQ0EwHhcNMTcxMjIxMDAwMDAwWhcNMTgxMjIxMjM1 OTU5WjAiMSAwHgYJKoZIhvcNAQkBFhFkd213QGFtYXpvbi5jby51azCCASIwDQYJKoZIhvcNAQEB BQADggEPADCCAQoCggEBAKdGKgXuwKMg2r+i/4BZZC0ddRxNq3xIKTakie/VCSzoO7P17A36ZzUc VMEYPfqDt/65xoc6Tdih+qkY2pNDppZ1DZ8mVrAX6O2O60ZhmXB60wMoDvXPZInvkMOW4drqnje/ 7/NOypn/XQAY+ln4KT+3tHG3TfryyJFMedqC/r29KJlCeeCxIzdtq2j5mN42tvPVv4+p+Kr77uui 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