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Wed, 12 Aug 2026 09:34:00 -0700 (PDT) Message-ID: Date: Wed, 12 Aug 2026 12:33:45 -0400 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] crypto: qce - Replace with stub driver To: Bartosz Golaszewski , Eric Biggers Cc: 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: <20260731050838.158825-1-ebiggers@kernel.org> <3ba57269-3305-4d80-b3f2-aa82fa59b59d@gmail.com> <20260801162900.GA2021@quark> <20260801171242.GA3567@quark> <20260811224110.GC1905@sol> 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: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="------------GyUom66QLghtcvfW8pbhyBYR" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --------------GyUom66QLghtcvfW8pbhyBYR Content-Type: multipart/mixed; boundary="------------6zVWfHQIO5csRmwlYh0DKQg0"; protected-headers="v1"; hp="clear" Message-ID: Date: Wed, 12 Aug 2026 12:33:45 -0400 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] crypto: qce - Replace with stub driver To: Bartosz Golaszewski , Eric Biggers Cc: 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: <20260731050838.158825-1-ebiggers@kernel.org> <3ba57269-3305-4d80-b3f2-aa82fa59b59d@gmail.com> <20260801162900.GA2021@quark> <20260801171242.GA3567@quark> <20260811224110.GC1905@sol> 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 8/12/26 04:07, Bartosz Golaszewski wrote: > On Wed, 12 Aug 2026 00:41:10 +0200, Eric Biggers = said: >> On Tue, Aug 11, 2026 at 08:42:55AM -0500, Bartosz Golaszewski wrote: >> >>> No, the rationale has never been this. FWIW it can be that it's used = for >>> testing of the crypto module on a supported platform and that is alre= ady >>> enough of a reason to keep it upstream. >>> >>> As I've said before: we don't just drop maintained drivers from linux= =2E >> >> We definitely do if the drivers are not useful or appropriate for >> inclusion in the kernel, though the policy varies by subsystem. Even >> just last month an entire filesystem got dropped despite someone wanti= ng >> to maintain it. >> >=20 > I suppose you're talking about EFS? A thing that can't even be tested o= n real > hardware? This is a much more extreme case. Here you have several peopl= e > representing the vendor saying they want to keep and maintain it. I'm f= ine > having my own tree and sending PRs to Herbert if he agrees and you are = of > course entirely free to disregard any patches targetting it. Would you be okay with one of these options? 1. Make the stub driver as the default, with the real driver guarded by an off-by-default Kconfig option. 2. Keep the driver as is (with the power management issue fixed), but don't register any algorithm implementations with the crypto API. 3. Only register algorithm implementations with the crypto API if a non-default Kconfig option is selected. 4. Only register algorithm implementations with the crypto API if a non-default module parameter is selected. 5. Move the driver out of drivers/crypto, delete the algorithm registrations, and then add support for restricted media content decryption later. The last option would be my preferred one. Also, if Qualcomm has customers who use the QCE via the crypto API, is Qualcomm aware of _why_ they made that choice? From Eric's and my perspective, that seems like a very strange decision, unless there are factors that Eric and I are not aware of. Finally, would you be willing to have a group call to discuss this at some point? That might be a more suitable venue for this kind of discussion, and could potentially lead to a conclusion faster. Also, while at least I couldn't sign any NDAs, there might be information that you could discuss there that you cannot post to a public mailing list. --=20 Sincerely, Demi Marie Obenour (she/her/hers) --------------6zVWfHQIO5csRmwlYh0DKQg0-- --------------GyUom66QLghtcvfW8pbhyBYR 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/sszaHOrMp8lMFAmp8oHMACgkQszaHOrMp 8lMQ9A//QJhJ0WxnD3czDPUecAwiool8hr6eNkI+7yOuU64ELLj5lqjVwiU4Mpi2 cFtokcg5uTSi47zXn1zva367V8mUpBLEhig5Y8sY0LPoz6GhqIqBZRKBeMnDS49D conE2J7MTlZPmF9CHlI/U4ox5ppQkGsDmMSpjvllIbZTsFgUTXFgzMV8ZPJ2fNKv U36tafg51dlENv/J5gOcRubblJz+WmJ9RoN1h5r0rjLYT/6P+eArUjKn3RylzFG5 AmgaABzAXBsHZ/0ciPcMmOGxc/fuHSfOxSYnbsSIN3V4IYmof0QSiGeHBCJlnNX0 Ahzld3abt5DZM5S97MNiBI3TT7swLYPdTEHrt3Qk/zCdR5tlWsTYx4kjVdpIKhoV RPJqbx/oqPgdYu1QrUxUSY46PYbVhawBvtvcljRqtaFyzryK94qtTCQEOzSddWwz N7sHidjwjvhuhiTPzm4ppCbHJA36JzoBlbUOA0cygvUBpoozU5Hlgr6OKgGPumAg R6vthtvcn2FnFx4Gt3om8FOvLrMLPQWCmN6cgDY8IOja18cxJexupdwB2Qtr59m7 oZXzNPrjdjMDNE8DUNvvusn0f8xKQSCwYLZDsblCgdahkRuw1n++bLwL23EXvnKr P/GUjDHX9/FHNE9C1HwDEHQ5eJV2FRqwAx8ywso4+Y1BJaoAF38= =kYiV -----END PGP SIGNATURE----- --------------GyUom66QLghtcvfW8pbhyBYR--