From patchwork Mon Sep 2 16:15:45 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adhemerval Zanella X-Patchwork-Id: 825038 Received: from mail-wr1-f42.google.com (mail-wr1-f42.google.com [209.85.221.42]) (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 BB5AB149C50 for ; Mon, 2 Sep 2024 16:19:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.42 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725293958; cv=none; b=Y4QlD/gwp5qYvXkU0rGTu9/mil5usH62q51vG5aTiO7Gw2wgmgnERwTP6V/c8h3w2rvwoZYvd5bc5dqJsGEny/inAWA4zrjg2pJZmhbH4XG5Qg+tX+BwvbAEm9KePdT1fgiS+cDFpu0V15+3H/Zd/319yj1JsIa5bDIZzzESCoc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725293958; c=relaxed/simple; bh=hj3MXW4jHA3xVGuuoslii7RqqzICqV3FJUookSbQJhk=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=Pz6GWVM8835Co5p1q3INFmuu2QytCZJaEM1JhXrQ/n4ZLOckY8p7qSzkVKDCsiqNCkxRvfwiHCrqLJf52PKIWUuEw8hNpyBIVsDZDc98PrQgKobARxqRB4znVMTDKii3ZXXq4RcefYQCqeQnZXPerpbPhx1eQ3DP0RJjYq+8JLA= 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=VMLpFaeW; arc=none smtp.client-ip=209.85.221.42 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="VMLpFaeW" Received: by mail-wr1-f42.google.com with SMTP id ffacd0b85a97d-374bd059b12so1388101f8f.1 for ; Mon, 02 Sep 2024 09:19:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1725293955; x=1725898755; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:to :from:from:to:cc:subject:date:message-id:reply-to; bh=vkyMDCLd9ysLyI5RLQZB8Ncj/M1dFlma3LBWXQip8L8=; b=VMLpFaeWOH0YhF8aRyUpWLTDcoFvgXUqODZwvDVmXLXRjjePn34lwH6zatVL8zZSko vLSnUpjBiQ/YSnI47jt3fw3iK3o2PyslK2ebrzDa5Inwo1XxU9bQB67N+hxvaTYMK5jh QhOwSaM1t3kbRikfIIAJoq6Jdc3k+aFaAljwsmrpRCswvrLMmUaxMRL6nlgGTP5MDWpO lhbfsuMbtLAntAERYXdRgMYSN85xWr7ow1IidofWD87oqJ+L9jex1sM+GbCF1uroOcY5 IfelqjxHCovPOE4v6vUg/dNWXhLWzzKSCIPNUfB9zqwvI0meKl7iCTXQYFNfjyMSvHjA kPgQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1725293955; x=1725898755; h=content-transfer-encoding:mime-version:message-id:date:subject:to :from:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=vkyMDCLd9ysLyI5RLQZB8Ncj/M1dFlma3LBWXQip8L8=; b=WhBvn5dzWxH3oudugmqVjttc7FqZ+kpehtkf1vjV1xoI2XFzcQ5S4T7mvVeOtcCnAy sJ0BGsgfv+dP49k4gd9OzngoWl1GeYQNDlF2KVauY7fcec+Tb7e+xkzDQqzPMyLKm+Z7 7x6Lx9FckQlAwIIx/Agxq9+GZ/tovbWT4p9n2Oi/IfWK9gPwf/z3s6qbae0kmr4anWUd AwKm5rhV7sfFqdCxane5aFEg0CgwX7Yda+VEB4b2mjdIWhQUKwSzmkLWtStJmlTpXp7V eCZLK/gTd52V8X59Unc1A2uNY+RP+ZO7kZ9BQK3Z9eiSEyJjEJJWcWdxesm8OswciL0s 0a5A== X-Forwarded-Encrypted: i=1; AJvYcCXgcFzV64XlTyEEywT+GTSc426qPaPdBKMA1G7dy33jOtDuVo0yRSjLoS/cSZj7wVWId4TBCb6I/CNmH0o=@vger.kernel.org X-Gm-Message-State: AOJu0YyHoAFHXpMEdD2zPgLH63fbvrP0JiWZ1EXBFOtHLCQzBbwY8so6 K3/wDQ8GsxpjMmJ9kt54F1F/yBhZ37NOvIENij0SNIsIFs0Kz+igSbSnWjKTVSI= X-Google-Smtp-Source: AGHT+IHesPPhCPjvUcRq0H6NjoEXRkOvc8FVbv0aFUX8CIV5jvLI1kMhKeSNICFtv/lYiO8fmaQ/Fg== X-Received: by 2002:a05:6000:cf:b0:374:c101:32 with SMTP id ffacd0b85a97d-374c10100c3mr3726845f8f.46.1725293954927; Mon, 02 Sep 2024 09:19:14 -0700 (PDT) Received: from ubuntu-vm.. (51-148-40-55.dsl.zen.co.uk. [51.148.40.55]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-42bb6deb239sm145970065e9.5.2024.09.02.09.19.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Sep 2024 09:19:14 -0700 (PDT) From: Adhemerval Zanella To: "Jason A . Donenfeld" , Theodore Ts'o , linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arch@vger.kernel.org, Catalin Marinas , Will Deacon , Thomas Gleixner , Eric Biggers , Christophe Leroy Subject: [PATCH v4 0/2] arm64: Implement getrandom() in vDSO Date: Mon, 2 Sep 2024 16:15:45 +0000 Message-ID: <20240902161912.2751-1-adhemerval.zanella@linaro.org> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Implement stack-less ChaCha20 and wire it with the generic vDSO getrandom code. The first patch is Mark's fix to the alternatives system in the vDSO, while the the second is the actual vDSO work. Changes from v3: - Use alternative_has_cap_likely instead of ALTERNATIVE. Changes from v2: - Refactor Makefile to use same flags for vgettimeofday and vgetrandom. - Removed rodata usage and fixed BE on vgetrandom-chacha.S. Changes from v1: - Fixed style issues and typos. - Added fallback for systems without NEON support. - Avoid use of non-volatile vector registers in neon chacha20. - Use c-getrandom-y for vgetrandom.c. - Fixed TIMENS vdso_rnd_data access. Adhemerval Zanella (1): arm64: vdso: wire up getrandom() vDSO implementation Mark Rutland (1): arm64: alternative: make alternative_has_cap_likely() VDSO compatible arch/arm64/Kconfig | 1 + arch/arm64/include/asm/alternative-macros.h | 4 + arch/arm64/include/asm/mman.h | 6 +- arch/arm64/include/asm/vdso.h | 6 + arch/arm64/include/asm/vdso/getrandom.h | 50 ++++++ arch/arm64/include/asm/vdso/vsyscall.h | 10 ++ arch/arm64/kernel/vdso.c | 6 - arch/arm64/kernel/vdso/Makefile | 25 ++- arch/arm64/kernel/vdso/vdso | 1 + arch/arm64/kernel/vdso/vdso.lds.S | 4 + arch/arm64/kernel/vdso/vgetrandom-chacha.S | 178 ++++++++++++++++++++ arch/arm64/kernel/vdso/vgetrandom.c | 15 ++ tools/arch/arm64/vdso | 1 + tools/include/linux/compiler.h | 4 + tools/testing/selftests/vDSO/Makefile | 3 +- 15 files changed, 298 insertions(+), 16 deletions(-) create mode 100644 arch/arm64/include/asm/vdso/getrandom.h create mode 120000 arch/arm64/kernel/vdso/vdso create mode 100644 arch/arm64/kernel/vdso/vgetrandom-chacha.S create mode 100644 arch/arm64/kernel/vdso/vgetrandom.c create mode 120000 tools/arch/arm64/vdso