From patchwork Fri Mar 14 21:39:37 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Deepak Gupta X-Patchwork-Id: 873670 Received: from mail-pl1-f175.google.com (mail-pl1-f175.google.com [209.85.214.175]) (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 E973A213227 for ; Fri, 14 Mar 2025 21:40:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.175 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741988416; cv=none; b=Fv11xytmkyHrnQD+43sTP0wM5ffmSI039XmwxdFTCsSYORfMkZHUMem7zkgIUKjOL94IR966UixkhvZP0NBGOanRMFtsCjfTMXwesEYqvPopuRu7oH7GopkQsGtJ7DHQlk0cNdkliJQkpWUciFA1baeuRFtvN7zuIr41xwzWEY0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741988416; c=relaxed/simple; bh=UvMauEZ7ujgiT53rhoVNtF8wKatfWBS5dd1E01vsJYA=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=DczQoz1CTSz1nkT6W9kQ4oWlVP3OSWUxzgoPh9HthlWdi+OP40VZGSmines6/FAbYeS/eG3tGu0DXYk8AzKngx9ouxFuYTTW2ZfHXJz8PC5oQdOzO8ZiJsurn97JHqO/3z+PBTF1DlN71dMcYuMkR9biYs8s6Xk0KtTKHMfrkwQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=rivosinc.com; spf=pass smtp.mailfrom=rivosinc.com; dkim=pass (2048-bit key) header.d=rivosinc-com.20230601.gappssmtp.com header.i=@rivosinc-com.20230601.gappssmtp.com header.b=AmJYziYU; arc=none smtp.client-ip=209.85.214.175 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=rivosinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=rivosinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=rivosinc-com.20230601.gappssmtp.com header.i=@rivosinc-com.20230601.gappssmtp.com header.b="AmJYziYU" Received: by mail-pl1-f175.google.com with SMTP id d9443c01a7336-223594b3c6dso52489145ad.2 for ; Fri, 14 Mar 2025 14:40:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20230601.gappssmtp.com; s=20230601; t=1741988414; x=1742593214; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=hU6IAlGSwKWKw5iWDrFBqBdwaJZ69/+Cs7+/DXu3do8=; b=AmJYziYUUySw4rnMaaAFZiIBbybv4+yoituPzi7wR8FIF35gpuRBCzFs/lmZ1ShmA2 vPoXuXOdQhc1WdtWt2flJvrAtS5LwDZgE5FDmPIme/nQCp7To5Xu45qkttI7mwENQLxy LPpvRJ3nKb49bhsTltPIM2fvWhNxIA2zcPTqlzRLMlWWvs7NlhuJDvtw0IHHapSQgXPy wJgOej53j4R3KCHqaW0BMu1UYtTyNoRTnUiwKt6CRtZr4t1z9cxfyT58MHdXplhhHyJL 83vj2PltwIcuGd613B4ft0dcmCu5a8PoFFD5FSDpGsM3PKvyLx5xIxvaDFwKK8DrqotD hAKw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1741988414; x=1742593214; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=hU6IAlGSwKWKw5iWDrFBqBdwaJZ69/+Cs7+/DXu3do8=; b=iQ0l2pUG7A3PW06ap0PbgV881XW2nhYQoonZghii2maaid40qFNIunJb6aFNRa4poL Lt9opE26BBSHbuPAVJWzAwGOOey9jsxcoN7/dui22YoftgEvuF1Bz7q1CUaJsL2cNPVH 2jlxfIOSofBUbJsroriSCA7RvTua8D07V/RA7n0uKM1lRksSsb/XdxDuQwoPNvwqEOcZ VgM+gq1g/1bKQTLZ5EysIGonzrJqvIavyLFHr3e9GFdv2yUxer5dQhkbXvz0qJgHlEPf 5qKglpGWpoOE8yOVJ7PDmfQ4n/7Hsw+qgVJ3RpYGQ/C0VI0FmctrJNEGRrqAMS9GANZF dhWA== X-Forwarded-Encrypted: i=1; AJvYcCW0vypQjnjk31pyES1inSlkOm6fgfJ3hB+0ixU2yGQ6SpNMz63lPbY6CiQnE5be+qjiQyMA0w7KA/3K+Qwtrjw=@vger.kernel.org X-Gm-Message-State: AOJu0YwCZWw7ExzG8pRaoO4cFnQ4HoOtAxWY/DvSSU+BvzAZKJpsDJXj KxeirqsPV7VX4CjLJ8AkXrrrlGKrtEbSG4aZ/2hXjwXO1I5kjBBT6vjJ4Ou2giw= X-Gm-Gg: ASbGnctIGv2xJSOk53ltnMe7DQJys9rXwlf/OQDfOnblRFcwMx3KtVPkuXQp1PvFfom IQjQkPTW7sUMQeBFAlL4+MAzTWfcLWzDM6saUAggnB7lCMjCAgqCphVxKDK6e/Bw4rqRSS5w4WM BSZeY0oCVAvOaZNUM/guqdtLCczcwme6LvQ45Af6jGnqjvli+k8GgT3aGMJwbE+nLLoOGJpznkt vSXnK0eT8NHedTvZvHDgyYDEpZc78VYDSvFIkbMFasEpFM0AVlHMq05Rg1gzwUelFREYIE/3+Gb jSUSNfqlQkGEZ3P52GEOz3OLKE6dxROe3cZrcbQIhzUPtEvPSTDrgLU= X-Google-Smtp-Source: AGHT+IFf7KDxEVU9NtNTwXHHWwqDPalXGdl70DI+8CNTgQz9PWl/u1/S9R+7SGLAPbVztXvT9lTY2A== X-Received: by 2002:a17:903:18f:b0:21f:768:cced with SMTP id d9443c01a7336-225e0a1644emr36247295ad.8.1741988414327; Fri, 14 Mar 2025 14:40:14 -0700 (PDT) Received: from debug.ba.rivosinc.com ([64.71.180.162]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-225c68a6e09sm33368855ad.55.2025.03.14.14.40.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 14 Mar 2025 14:40:14 -0700 (PDT) From: Deepak Gupta Date: Fri, 14 Mar 2025 14:39:37 -0700 Subject: [PATCH v12 18/28] riscv/kernel: update __show_regs to print shadow stack register Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250314-v5_user_cfi_series-v12-18-e51202b53138@rivosinc.com> References: <20250314-v5_user_cfi_series-v12-0-e51202b53138@rivosinc.com> In-Reply-To: <20250314-v5_user_cfi_series-v12-0-e51202b53138@rivosinc.com> To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Andrew Morton , "Liam R. Howlett" , Vlastimil Babka , Lorenzo Stoakes , Paul Walmsley , Palmer Dabbelt , Albert Ou , Conor Dooley , Rob Herring , Krzysztof Kozlowski , Arnd Bergmann , Christian Brauner , Peter Zijlstra , Oleg Nesterov , Eric Biederman , Kees Cook , Jonathan Corbet , Shuah Khan , Jann Horn , Conor Dooley Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-arch@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, alistair.francis@wdc.com, richard.henderson@linaro.org, jim.shu@sifive.com, andybnac@gmail.com, kito.cheng@sifive.com, charlie@rivosinc.com, atishp@rivosinc.com, evan@rivosinc.com, cleger@rivosinc.com, alexghiti@rivosinc.com, samitolvanen@google.com, broonie@kernel.org, rick.p.edgecombe@intel.com, Deepak Gupta X-Mailer: b4 0.14.0 Updating __show_regs to print captured shadow stack pointer as well. On tasks where shadow stack is disabled, it'll simply print 0. Signed-off-by: Deepak Gupta Reviewed-by: Alexandre Ghiti --- arch/riscv/kernel/process.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/riscv/kernel/process.c b/arch/riscv/kernel/process.c index 4587201dd81d..6bb53ce72ed5 100644 --- a/arch/riscv/kernel/process.c +++ b/arch/riscv/kernel/process.c @@ -90,8 +90,8 @@ void __show_regs(struct pt_regs *regs) regs->s8, regs->s9, regs->s10); pr_cont(" s11: " REG_FMT " t3 : " REG_FMT " t4 : " REG_FMT "\n", regs->s11, regs->t3, regs->t4); - pr_cont(" t5 : " REG_FMT " t6 : " REG_FMT "\n", - regs->t5, regs->t6); + pr_cont(" t5 : " REG_FMT " t6 : " REG_FMT " ssp : " REG_FMT "\n", + regs->t5, regs->t6, get_active_shstk(current)); pr_cont("status: " REG_FMT " badaddr: " REG_FMT " cause: " REG_FMT "\n", regs->status, regs->badaddr, regs->cause);