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Wed, 12 Aug 2026 09:34:01 -0700 (PDT) Received: from [10.138.10.6] ([185.98.168.14]) by smtp.gmail.com with ESMTPSA id 00721157ae682-830a368e86asm15513787b3.1.2026.08.12.09.33.59 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); 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-crypto@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; 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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--