From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754532Ab2LEVHF (ORCPT ); Wed, 5 Dec 2012 16:07:05 -0500 Received: from merlin.infradead.org ([205.233.59.134]:49005 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752446Ab2LEVHD (ORCPT ); Wed, 5 Dec 2012 16:07:03 -0500 Message-ID: <1354741616.24281.172.camel@shinybook.infradead.org> Subject: Re: Use PCI ROMs from EFI boot services From: David Woodhouse To: Bjorn Helgaas Cc: Matthew Garrett , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-efi@vger.kernel.org, mfleming@intel.com, "Eric W. Biederman" Date: Wed, 05 Dec 2012 21:06:56 +0000 In-Reply-To: References: <1345739803-21017-1-git-send-email-mjg@redhat.com> <20121203200241.GG5906@thinkpad-t410> Content-Type: multipart/signed; micalg="sha1"; protocol="application/x-pkcs7-signature"; boundary="=-8Z0d2oE2ACAWkX/hwPsf" X-Mailer: Evolution 3.6.2 (3.6.2-3.fc18) Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --=-8Z0d2oE2ACAWkX/hwPsf Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, 2012-12-05 at 13:09 -0700, Bjorn Helgaas wrote: >=20 > David, Eric, what about the kexec question? It looks to me like this > wouldn't make things worse than they are today. If I understand > correctly, today we don't use ROM data from EFI on either an initial > boot or a kexec. After this patch, we could use EFI ROM data on the > initial boot, but not after a kexec. So it's worse in the sense that > the kexec case doesn't match the initial boot, but at least it's not > something that used to work and is now broken. Yeah, kexec under EFI doesn't work too well. I have a firmware running in qemu locally which will let you call SetVirtualAddressMap more than once, which is a step towards fixing it sanely. It got preempted, but I'll take another look at it shortly. --=20 David Woodhouse Open Source Technology Centre David.Woodhouse@intel.com Intel Corporation --=-8Z0d2oE2ACAWkX/hwPsf Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIUbjCCBjQw ggQcoAMCAQICAR4wDQYJKoZIhvcNAQEFBQAwfTELMAkGA1UEBhMCSUwxFjAUBgNVBAoTDVN0YXJ0 Q29tIEx0ZC4xKzApBgNVBAsTIlNlY3VyZSBEaWdpdGFsIENlcnRpZmljYXRlIFNpZ25pbmcxKTAn BgNVBAMTIFN0YXJ0Q29tIENlcnRpZmljYXRpb24gQXV0aG9yaXR5MB4XDTA3MTAyNDIxMDE1NVoX DTE3MTAyNDIxMDE1NVowgYwxCzAJBgNVBAYTAklMMRYwFAYDVQQKEw1TdGFydENvbSBMdGQuMSsw KQYDVQQLEyJTZWN1cmUgRGlnaXRhbCBDZXJ0aWZpY2F0ZSBTaWduaW5nMTgwNgYDVQQDEy9TdGFy dENvbSBDbGFzcyAxIFByaW1hcnkgSW50ZXJtZWRpYXRlIENsaWVudCBDQTCCASIwDQYJKoZIhvcN AQEBBQADggEPADCCAQoCggEBAMcJg8zOLdgasSmkLhOrlr6KMoOMpohBllVHrdRvEg/q6r8jR+EK 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