Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DE4F7C64EC4 for ; Thu, 9 Mar 2023 11:17:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229746AbjCILR1 (ORCPT ); Thu, 9 Mar 2023 06:17:27 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43570 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231486AbjCILRI (ORCPT ); Thu, 9 Mar 2023 06:17:08 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7B95938B43; Thu, 9 Mar 2023 03:13:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=MIME-Version:Content-Type:References: In-Reply-To:Date:Cc:To:From:Subject:Message-ID:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=gtavzcqZk5Zl9ysCGiQF3rnSUaKgPTCxP+s+4fBTsBE=; b=bsPdVTrqGCKfHujhjf3H05b23l 1NctJS6auuGsbVi8Du374jWi/gB7BS49Ivq4PSiyukHl0pM0cwhOAoqSMuljQPZxD+ISjDRI5QkJF odxOrNgFy3piLCOqI6XxfbuKtunexjDS3nd703kVJAU/+eu62IVP5si049W5WduBWtq5lhN9ev+ce L73Vq7JPJqPYuKJqV/alOK52uzsgeiUiOnrjeLSx8XPQUQ3DFPGqsdR+qn90YATTtxx4N2gb1wE3V RKhubfxe8qbbP1XaQ4tt1ZSpT860GLIbcB6+QukdnK8NJk0/AOUtBG0DyjhYyIFEvJWSVXL1kOAQN iUUzaDKg==; Received: from [2001:8b0:10b:5:e62f:87cb:46b1:1399] (helo=u3832b3a9db3152.ant.amazon.com) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1paEBw-008Lpg-5e; Thu, 09 Mar 2023 11:12:12 +0000 Message-ID: Subject: Re: [PATCH v5 06/14] x86/ioremap: Support hypervisor specified range to map as encrypted From: David Woodhouse To: Borislav Petkov , Dave Hansen Cc: "Michael Kelley (LINUX)" , Sean Christopherson , "hpa@zytor.com" , KY Srinivasan , Haiyang Zhang , "wei.liu@kernel.org" , Dexuan Cui , "luto@kernel.org" , "peterz@infradead.org" , "davem@davemloft.net" , "edumazet@google.com" , "kuba@kernel.org" , "pabeni@redhat.com" , "lpieralisi@kernel.org" , "robh@kernel.org" , "kw@linux.com" , "bhelgaas@google.com" , "arnd@arndb.de" , "hch@lst.de" , "m.szyprowski@samsung.com" , "robin.murphy@arm.com" , "thomas.lendacky@amd.com" , "brijesh.singh@amd.com" , "tglx@linutronix.de" , "mingo@redhat.com" , "dave.hansen@linux.intel.com" , Tianyu Lan , "kirill.shutemov@linux.intel.com" , "sathyanarayanan.kuppuswamy@linux.intel.com" , "ak@linux.intel.com" , "isaku.yamahata@intel.com" , "dan.j.williams@intel.com" , "jane.chu@oracle.com" , "tony.luck@intel.com" , "x86@kernel.org" , "linux-kernel@vger.kernel.org" , "linux-hyperv@vger.kernel.org" , "netdev@vger.kernel.org" , "linux-pci@vger.kernel.org" , "linux-arch@vger.kernel.org" , "iommu@lists.linux.dev" Date: Thu, 09 Mar 2023 11:12:10 +0000 In-Reply-To: <20230306215104.GEZAZgSPa4qBBu9lRd@fat_crate.local> References: <255249f2-47af-07b7-d9d9-9edfdd108348@intel.com> <20230306215104.GEZAZgSPa4qBBu9lRd@fat_crate.local> Content-Type: multipart/signed; micalg="sha-256"; protocol="application/pkcs7-signature"; boundary="=-aAuCihJhJxj+VLtIgtiP" User-Agent: Evolution 3.44.4-0ubuntu1 MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --=-aAuCihJhJxj+VLtIgtiP Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Mon, 2023-03-06 at 22:51 +0100, Borislav Petkov wrote: > On Thu, Feb 23, 2023 at 12:27:50PM -0800, Dave Hansen wrote: > > On 2/23/23 12:01, Michael Kelley (LINUX) wrote: > > > Dave Hansen:=C2=A0 Are you also OK with Sean's proposal?=C2=A0 Lookin= g for consensus > > > here .... > >=20 > > Yeah, I'm generally OK with it as long as Borislav is. >=20 > Right, I think we're ok with the following basic rules: >=20 > - pure arch/x86/ code should use the x86_platform function pointers to > =C2=A0 query hypervisor capabilities/peculiarities >=20 > - cc_platform_has() should be used in generic/driver code as it > =C2=A0 abstracts away the underlying platform better. IOW, querying > =C2=A0 x86_platform.... in generic, platform-agnostic driver code looks w= eird to > =C2=A0 say the least >=20 > The hope is that those two should be enough to support most guest types > and not let the zoo get too much out of hand... >=20 > Thx. In=20 https://lore.kernel.org/all/20230308171328.1562857-13-usama.arif@bytedance.= com/ I added an sev_es_active() helper for x86 code. Is that consistent with the vision here, or should I do something different= ? --=-aAuCihJhJxj+VLtIgtiP Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCCEkQw ggYQMIID+KADAgECAhBNlCwQ1DvglAnFgS06KwZPMA0GCSqGSIb3DQEBDAUAMIGIMQswCQYDVQQG EwJVUzETMBEGA1UECBMKTmV3IEplcnNleTEUMBIGA1UEBxMLSmVyc2V5IENpdHkxHjAcBgNVBAoT FVRoZSBVU0VSVFJVU1QgTmV0d29yazEuMCwGA1UEAxMlVVNFUlRydXN0IFJTQSBDZXJ0aWZpY2F0 aW9uIEF1dGhvcml0eTAeFw0xODExMDIwMDAwMDBaFw0zMDEyMzEyMzU5NTlaMIGWMQswCQYDVQQG EwJHQjEbMBkGA1UECBMSR3JlYXRlciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdTYWxmb3JkMRgwFgYD VQQKEw9TZWN0aWdvIExpbWl0ZWQxPjA8BgNVBAMTNVNlY3RpZ28gUlNBIENsaWVudCBBdXRoZW50 aWNhdGlvbiBhbmQgU2VjdXJlIEVtYWlsIENBMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKC AQEAyjztlApB/975Rrno1jvm2pK/KxBOqhq8gr2+JhwpKirSzZxQgT9tlC7zl6hn1fXjSo5MqXUf 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