From patchwork Thu Jun 20 23:13:33 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sam Protsenko X-Patchwork-Id: 13706522 Received: from mail-ot1-f42.google.com (mail-ot1-f42.google.com [209.85.210.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E8FDE14387C for ; Thu, 20 Jun 2024 23:13:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.42 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718925223; cv=none; b=saEw52WoyZdYeYrtftQXZswvx5iFqBwvpKkDUfWjen8OUFc6EcjaE9YsOzIcRyDoBnFTrqzjNczx+jXRKGy0If8L9KUkMREkuEl3J72idJfgiE6zmmNbT0UCxPa3IDeVLf8khhrtaKxV1QsPT4Cbk/ciGXc8KqtT76pveBnisB0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718925223; c=relaxed/simple; bh=7FK5A+P6y84XNMixDpkIf7uj9kSH1cgpl+CxUYDO8Vk=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version:Content-Type; b=fJoGBBpgaELrvbZqyj9l3H8El/Qt6CCoEK7GBUfvTJLV3i6vRyR71N05HAavNQ+SBxLeGyxx3NOAG6PB7MTLSE9VY8n3/FltRdPV43jE+iti/DYNQTt8n73Ai87xzYxBk3HeImAWfpQ2uyIwp9k8WHS4N3cpRmD/jdZsdPomhxc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=dq2OSXcn; arc=none smtp.client-ip=209.85.210.42 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="dq2OSXcn" Received: by mail-ot1-f42.google.com with SMTP id 46e09a7af769-6fa0edb64bdso740133a34.1 for ; Thu, 20 Jun 2024 16:13:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1718925220; x=1719530020; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=NpwkSv9KEC+Z0xSBroaOsC+eSM7dr3lxu3/BMAtc54s=; b=dq2OSXcnAbDwSQT+YWK/8VTgpWCzgPwNPi4RJoVl+6cYnxnZ7tNu5OL8SNTqs+S+0+ cIVDPm9GDNsALkx2L0yK+C49F4d4XaPUlJ9+Gko25ClWCjhlgCUd8VEcyBJ+58zQShJH qexLCMeXuDo5jIAVoRoXKzgwmHbiR6T/O6VAYhPkD6fq5wKm5deUP+88TSlurt/CMXyv exDTki1ol7kc8dlWo33sjdiPJx5AEzWzkMBDORF1plUoQEk9nxIgE40y7F8nHm1Quajq JU7Lx2bXj4nV+xmvX0FC30zIcAecC0mDA181CKKiYsknKXySiYvoEJcAjvEOrYwyHJfg F92g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718925220; x=1719530020; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=NpwkSv9KEC+Z0xSBroaOsC+eSM7dr3lxu3/BMAtc54s=; b=WfcdglEjK04z+bXWElX/ijPXYyIXTu0aL+ItHXAFSvgUZdHlgV9fA5xBRL4i+/tC6U h02etjRFayRHKvN3eSymfFFIllKMEwr/4l/IwV/oIMONXBoaC2Q/id+L0tFzzLYzzUEe 6C6HV3PQ5EzINXfnexpyYD83o7z8vGTy/dmJb2J9Jw+Z+dT0gZijOMDY5J4apeFJ/HXn mtWpFtMkx1zN2SdZ7iyHttYqgvgCcQIC/5tGPGGnYpfwpptXzmgXLIAGwO1X3t3X8C24 1vOIBetkAT2en+9VqeXt6DfUasZ5sy7++nllXdrY4xZhGnmjfA9EnXW3kmL/hc9+WyBO 7XHw== X-Forwarded-Encrypted: i=1; AJvYcCULDlwe3mDYPY8fAnd5jvP2HjTS2qD9YMNWTB+0YCTYflnLW/JQcR+5Bc11aveKkpowsbjerwnorkyYk2EgswNjyZEc1cjhhj/u65bt X-Gm-Message-State: AOJu0YyR554/DB7Z4mBcTN/niplgSegECiNNBH5oBBq3VRCosXAfJ0Tt Xn7qaf9IoczZ2StgwkOoPsOXBWVyBK75/mKd6LaUuVxg13m5Km4ChYQSf3G8NeM= X-Google-Smtp-Source: AGHT+IEzPzN/aMnfj5b73omu5ib7OPwkka1Y2/64FBGQsxHICvhZtCMGfoJmvMptfycgLlXfEvq8pw== X-Received: by 2002:a9d:6510:0:b0:6fd:6240:9dba with SMTP id 46e09a7af769-70074ebf134mr6416843a34.16.1718925219979; Thu, 20 Jun 2024 16:13:39 -0700 (PDT) Received: from localhost ([136.62.192.75]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-7009c5df34fsm89509a34.3.2024.06.20.16.13.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 20 Jun 2024 16:13:39 -0700 (PDT) From: Sam Protsenko To: =?utf-8?q?=C5=81ukasz_Stelmach?= , Krzysztof Kozlowski , Rob Herring , Conor Dooley Cc: Anand Moon , Olivia Mackall , Herbert Xu , Alim Akhtar , linux-samsung-soc@vger.kernel.org, linux-crypto@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 0/6] hwrng: exynos: Add support for Exynos850 Date: Thu, 20 Jun 2024 18:13:33 -0500 Message-Id: <20240620231339.1574-1-semen.protsenko@linaro.org> X-Mailer: git-send-email 2.39.2 Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Exynos850 has True Random Number Generator (TRNG) block which is very similar to Exynos5250 for which the driver already exists (exynos-trng.c). There are two differences though: 1. Additional SSS PCLK clock has to be enabled to make TRNG registers accessible. 2. All SSS registers (including TRNG area) are protected with TrustZone and can only be accessed from EL3 monitor. So the corresponding SMC calls have to be used instead to interact with TRNG block. This patch series enables TRNG support on Exynos850 SoC. It was tested on the E850-96 board running Debian rootfs like this: 8<-------------------------------------------------------------->8 # cat /sys/devices/virtual/misc/hw_random/rng_current 12081400.rng # dd if=/dev/hwrng bs=100000 count=1 > /dev/null ... 122KB/s # apt install rng-tools5 # rngtest -c 1000 < /dev/hwrng ... rngtest: starting FIPS tests... rngtest: bits received from input: 20000032 rngtest: FIPS 140-2 successes: 1000 rngtest: FIPS 140-2 failures: 0 rngtest: FIPS 140-2(2001-10-10) Monobit: 0 rngtest: FIPS 140-2(2001-10-10) Poker: 0 rngtest: FIPS 140-2(2001-10-10) Runs: 0 rngtest: FIPS 140-2(2001-10-10) Long run: 0 rngtest: FIPS 140-2(2001-10-10) Continuous run: 0 rngtest: input channel speed: (min=941.855; avg=965.515; max=968.236)Kibits/s rngtest: FIPS tests speed: (min=49.542; avg=52.886; max=53.577)Mibits/s rngtest: Program run time: 20590194 microseconds 8<-------------------------------------------------------------->8 SMC commands added in this series require LDFW (Loadable Firmware) to be loaded by the bootloader. In case of E850-96 board, at the moment only the LittleKernel based bootloader [1] is able to load LDFW. It is expected to be added into U-Boot port soon as well. See [2] for more details. [1] https://gitlab.com/Linaro/96boards/e850-96/lk [2] https://docs.u-boot.org/en/latest/board/samsung/e850-96.html Changes in v3: - Rebased on top of the most recent linux-next - Removed dts patch (7/7) from the series, as suggested by Krzysztof - Addressed all review comments for v2 series Changes in v2: - Removed the patch for renaming the dt-bindings doc file - Added the patch for using devm_clk_get_enabled() to get the clock - Addressed all review comments for v1 series Sam Protsenko (6): dt-bindings: rng: Add Exynos850 support to exynos-trng hwrng: exynos: Improve coding style hwrng: exynos: Use devm_clk_get_enabled() to get the clock hwrng: exynos: Implement bus clock control hwrng: exynos: Add SMC based TRNG operation hwrng: exynos: Enable Exynos850 support .../bindings/rng/samsung,exynos5250-trng.yaml | 40 +++- drivers/char/hw_random/exynos-trng.c | 225 +++++++++++++----- 2 files changed, 206 insertions(+), 59 deletions(-)