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Thu, 13 Aug 2026 14:00:33 -0700 (PDT) Received: from [10.138.10.6] ([185.98.168.14]) by smtp.gmail.com with ESMTPSA id 956f58d0204a3-66c573c183fsm1372691d50.12.2026.08.13.14.00.31 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 13 Aug 2026 14:00:32 -0700 (PDT) Message-ID: Date: Thu, 13 Aug 2026 17:00:28 -0400 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] crypto: qce - Replace with stub driver To: Eric Biggers Cc: Bartosz Golaszewski , linux-crypto@vger.kernel.org, Herbert Xu , linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Kuldeep Singh , Dmitry Baryshkov , Konrad Dybcio , Greg Kroah-Hartman , Krzysztof Kozlowski References: <20260801162900.GA2021@quark> <20260801171242.GA3567@quark> <20260811224110.GC1905@sol> <0d2706c6-79fa-40fc-a24a-6d5ffbf02330@gmail.com> <20260813201019.GA987015@google.com> Content-Language: en-US From: Demi Marie Obenour Autocrypt: addr=demiobenour@gmail.com; keydata= xsFNBFp+A0oBEADffj6anl9/BHhUSxGTICeVl2tob7hPDdhHNgPR4C8xlYt5q49yB+l2nipd aq+4Gk6FZfqC825TKl7eRpUjMriwle4r3R0ydSIGcy4M6eb0IcxmuPYfbWpr/si88QKgyGSV Z7GeNW1UnzTdhYHuFlk8dBSmB1fzhEYEk0RcJqg4AKoq6/3/UorR+FaSuVwT7rqzGrTlscnT DlPWgRzrQ3jssesI7sZLm82E3pJSgaUoCdCOlL7MMPCJwI8JpPlBedRpe9tfVyfu3euTPLPx wcV3L/cfWPGSL4PofBtB8NUU6QwYiQ9Hzx4xOyn67zW73/G0Q2vPPRst8LBDqlxLjbtx/WLR 6h3nBc3eyuZ+q62HS1pJ5EvUT1vjyJ1ySrqtUXWQ4XlZyoEFUfpJxJoN0A9HCxmHGVckzTRl 5FMWo8TCniHynNXsBtDQbabt7aNEOaAJdE7to0AH3T/Bvwzcp0ZJtBk0EM6YeMLtotUut7h2 Bkg1b//r6bTBswMBXVJ5H44Qf0+eKeUg7whSC9qpYOzzrm7+0r9F5u3qF8ZTx55TJc2g656C 9a1P1MYVysLvkLvS4H+crmxA/i08Tc1h+x9RRvqba4lSzZ6/Tmt60DPM5Sc4R0nSm9BBff0N m0bSNRS8InXdO1Aq3362QKX2NOwcL5YaStwODNyZUqF7izjK4QARAQABzTxEZW1pIE1hcmll IE9iZW5vdXIgKGxvdmVyIG9mIGNvZGluZykgPGRlbWlvYmVub3VyQGdtYWlsLmNvbT7CwXgE EwECACIFAlp+A0oCGwMGCwkIBwMCBhUIAgkKCwQWAgMBAh4BAheAAAoJELKItV//nCLBhr8Q AK/xrb4wyi71xII2hkFBpT59ObLN+32FQT7R3lbZRjVFjc6yMUjOb1H/hJVxx+yo5gsSj5LS 9AwggioUSrcUKldfA/PKKai2mzTlUDxTcF3vKx6iMXKA6AqwAw4B57ZEJoMM6egm57TV19kz PMc879NV2nc6+elaKl+/kbVeD3qvBuEwsTe2Do3HAAdrfUG/j9erwIk6gha/Hp9yZlCnPTX+ VK+xifQqt8RtMqS5R/S8z0msJMI/ajNU03kFjOpqrYziv6OZLJ5cuKb3bZU5aoaRQRDzkFIR 6aqtFLTohTo20QywXwRa39uFaOT/0YMpNyel0kdOszFOykTEGI2u+kja35g9TkH90kkBTG+a EWttIht0Hy6YFmwjcAxisSakBuHnHuMSOiyRQLu43ej2+mDWgItLZ48Mu0C3IG1seeQDjEYP tqvyZ6bGkf2Vj+L6wLoLLIhRZxQOedqArIk/Sb2SzQYuxN44IDRt+3ZcDqsPppoKcxSyd1Ny 2tpvjYJXlfKmOYLhTWs8nwlAlSHX/c/jz/ywwf7eSvGknToo1Y0VpRtoxMaKW1nvH0OeCSVJ itfRP7YbiRVc2aNqWPCSgtqHAuVraBRbAFLKh9d2rKFB3BmynTUpc1BQLJP8+D5oNyb8Ts4x Xd3iV/uD8JLGJfYZIR7oGWFLP4uZ3tkneDfYzsFNBFp+A0oBEAC9ynZI9LU+uJkMeEJeJyQ/ 8VFkCJQPQZEsIGzOTlPnwvVna0AS86n2Z+rK7R/usYs5iJCZ55/JISWd8xD57ue0eB47bcJv VqGlObI2DEG8TwaW0O0duRhDgzMEL4t1KdRAepIESBEA/iPpI4gfUbVEIEQuqdqQyO4GAe+M kD0Hy5JH/0qgFmbaSegNTdQg5iqYjRZ3ttiswalql1/iSyv1WYeC1OAs+2BLOAT2NEggSiVO txEfgewsQtCWi8H1SoirakIfo45Hz0tk/Ad9ZWh2PvOGt97Ka85o4TLJxgJJqGEnqcFUZnJJ riwoaRIS8N2C8/nEM53jb1sH0gYddMU3QxY7dYNLIUrRKQeNkF30dK7V6JRH7pleRlf+wQcN fRAIUrNlatj9TxwivQrKnC9aIFFHEy/0mAgtrQShcMRmMgVlRoOA5B8RTulRLCmkafvwuhs6 dCxN0GNAORIVVFxjx9Vn7OqYPgwiofZ6SbEl0hgPyWBQvE85klFLZLoj7p+joDY1XNQztmfA rnJ9x+YV4igjWImINAZSlmEcYtd+xy3Li/8oeYDAqrsnrOjb+WvGhCykJk4urBog2LNtcyCj kTs7F+WeXGUo0NDhbd3Z6AyFfqeF7uJ3D5hlpX2nI9no/ugPrrTVoVZAgrrnNz0iZG2DVx46 x913pVKHl5mlYQARAQABwsFfBBgBAgAJBQJafgNKAhsMAAoJELKItV//nCLBwNIP/AiIHE8b oIqReFQyaMzxq6lE4YZCZNj65B/nkDOvodSiwfwjjVVE2V3iEzxMHbgyTCGA67+Bo/d5aQGj gn0TPtsGzelyQHipaUzEyrsceUGWYoKXYyVWKEfyh0cDfnd9diAm3VeNqchtcMpoehETH8fr RHnJdBcjf112PzQSdKC6kqU0Q196c4Vp5HDOQfNiDnTf7gZSj0BraHOByy9LEDCLhQiCmr+2 E0rW4tBtDAn2HkT9uf32ZGqJCn1O+2uVfFhGu6vPE5qkqrbSE8TG+03H8ecU2q50zgHWPdHM OBvy3EhzfAh2VmOSTcRK+tSUe/u3wdLRDPwv/DTzGI36Kgky9MsDC5gpIwNbOJP2G/q1wT1o Gkw4IXfWv2ufWiXqJ+k7HEi2N1sree7Dy9KBCqb+ca1vFhYPDJfhP75I/VnzHVssZ/rYZ9+5 1yDoUABoNdJNSGUYl+Yh9Pw9pE3Kt4EFzUlFZWbE4xKL/NPno+z4J9aWemLLszcYz/u3XnbO vUSQHSrmfOzX3cV4yfmjM5lewgSstoxGyTx2M8enslgdXhPthZlDnTnOT+C+OTsh8+m5tos8 HQjaPM01MKBiAqdPgksm1wu2DrrwUi6ChRVTUBcj6+/9IJ81H2P2gJk3Ls3AVIxIffLoY34E +MYSfkEjBz0E8CLOcAw7JIwAaeBT In-Reply-To: <20260813201019.GA987015@google.com> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------VV74HMKUvFY0IstpkeEw3GQi" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260813_140035_620139_05C1B4C8 X-CRM114-Status: GOOD ( 22.99 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --------------VV74HMKUvFY0IstpkeEw3GQi Content-Type: multipart/mixed; boundary="------------vXcDquSo5DAmeTNxhw1azXQg"; protected-headers="v1"; hp="clear" Message-ID: Date: Thu, 13 Aug 2026 17:00:28 -0400 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] crypto: qce - Replace with stub driver To: Eric Biggers Cc: Bartosz Golaszewski , linux-crypto@vger.kernel.org, Herbert Xu , linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Kuldeep Singh , Dmitry Baryshkov , Konrad Dybcio , Greg Kroah-Hartman , Krzysztof Kozlowski References: <20260801162900.GA2021@quark> <20260801171242.GA3567@quark> <20260811224110.GC1905@sol> <0d2706c6-79fa-40fc-a24a-6d5ffbf02330@gmail.com> <20260813201019.GA987015@google.com> Content-Language: en-US From: Demi Marie Obenour Autocrypt: addr=demiobenour@gmail.com; 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charset=UTF-8 Content-Transfer-Encoding: quoted-printable On 8/13/26 16:10, Eric Biggers wrote: > On Thu, Aug 13, 2026 at 03:09:36PM -0400, Demi Marie Obenour wrote: >>> SM8650 with the QCE is FIPS 140-2 certified and apparently this makes= >>> a difference. Don't ask me if that makes sense, I don't claim to unde= rstand >>> the legal aspects of it. >> >> That sounds like the kind of thing that would cause someone to use >> a worse implementation of cryptographic algorithms =F0=9F=99=82. >> >> For what it is worth, many common uses of kernel cryptography can't >> use the QCE. This notably applies to the CSPRNG (/dev/urandom etc), >> storage encryption, and AF_ALG. Therefore, I expect that anyone who >> needs FIPS 140 compliance with Linux needs to ensure that the software= >> crypto is certified, as that's what actually gets used in most cases. >=20 > Well there's that, and also the Inline Crypto Engine (which is actually= > being used and is unrelated to QCE) has its own FIPS certification. >=20 > Which upstream kernel feature, if any, is QCE being used with? I have > asked this multiple times and still not gotten an answer. Historically AF_ALG has been used to access FIPS-certified crypto from userspace, but that no longer can be used with QCE. Most kernel features reject CRYPTO_ALG_ASYNC, CRYPTO_ALG_ALLOCATES_MEMORY, or both. If I exclude tests and fallback paths of other drivers, that leaves crypto/asymmetric_keys/public_key.c (hashing), BPF, MACsec, OpenVPN data channel offload, ecryptfs, Ceph, SMB, IPsec, mac802154, TIPC, TLS, and crypto/kpp.c. AF_ALG only allows offload drivers for cbc(paes), which QCE doesn't implement. QCE is broken with IPsec and probably some other networking protocols, as it would wind up taking a mutex in softirq context. Is there anything on that list that you don't plan to convert to the crypto library? > Does the perceived value perhaps come merely from "offering" FIPS > certified cryptography on the system -- then not actually using it in > practice? That can maybe be understandable in some cases, but it's als= o > not really something that belongs upstream where actual technical merit= > is expected. Also, could ICE be enough to check that checkbox? I agree with all of these points. --=20 Sincerely, Demi Marie Obenour (she/her/hers) --------------vXcDquSo5DAmeTNxhw1azXQg-- --------------VV74HMKUvFY0IstpkeEw3GQi Content-Type: application/pgp-signature; name="OpenPGP_signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="OpenPGP_signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEEopQtqVJW1aeuo9/sszaHOrMp8lMFAmp+MGwACgkQszaHOrMp 8lMutg/7B8gdX1TvVmKM/z92g+DZ5EUqQvQugMMX2Hm5Hapj0zV5f3XpCTx9ilQu IoOC/+nzo1rmTjawbSbriqVqzUUFE6E/7TlNOybweN1D238b3B71GysDXdXAoqtK FpF12cfj14UNvIHyYOXAC+F6UOPsl7fvdyhTsmgt7u4NBLtCdmWiAAjOsRFo8hcy qn8TvX09Aa80S5MNdGX+tyuQKeDnJpMG+Y0+OJP2aDoVvnNP8XIwpymqHjbGP83K jNqC7PCAKh7w0GF77zgllOiFjKMBBwKZDHYjm2vuPxvdMI0KkgXxl5PPbYsY0GWM 54p+dbXH1ketTyhhiMBs1Boe8DtnU4ZztylIu5y3MVDJBYUl9RjPWncXaVtW0MMD sKCvK1EZo08ggWHoeB0cMImesx5LiowAcnmoKml94gctWDGAZ1dFcsZt9TlaWguM osf7jofxrf+2DT3LCIRP3Evef45yzA3+MbDe1p8G4yD+Fmi3ZXwwNHWhrGCStS+r ZBg5kkvH+bddB6U83XWSQ9J9hWQa4Mu3szL+DUh1eu6jwrpw5axSGK2s6ilm8fuR VvinREf48xFMhwQ2hKVkWiwKR6EBgiQDFOmKVUokAgShKmEokb3EVrfMgfiXIpCy ImAPt5v/QSItBHKTUFAbePfVxmBswlAl0DMIuwG+SE6vSjKpgsE= =tY7Q -----END PGP SIGNATURE----- --------------VV74HMKUvFY0IstpkeEw3GQi--