From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f176.google.com (mail-pl1-f176.google.com [209.85.214.176]) (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 30F2330EF7A for ; Mon, 18 Aug 2025 14:36:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.176 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755527808; cv=none; b=kVDWhEutoR5igtJowjI7PqmsAG1ZT2gkG864M6mdBvoVppB6niuCXzYXtbE3BoA9lT/SO7qA0xpjYGu0Nhw2sfDXINdzSGzwTU4ik+EwqbCq9mn+89q7euiSrFj2uINtShkGxPvGaTfaq4Iz0/Y8zM6dzClmLl+1Gxd7WrHqEUA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755527808; c=relaxed/simple; bh=Mi7v/5SFKn7WwGpts4xb8BlAippn6V6B+njRlwy9Ex8=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=JLriq5VEBEs+Z3fuD1x1sbfgEfnq73CFmrqWMcGAweRokyjmnAt7dlvoZRgZSSYq0oXauVv+dF7hvZImJ3sutBjvE2YQiXyZbquuNSCKXWAlTqeo520l0IIMo3nMyPvHdLvDchNjmqzaHZSjo8pYxNUIzF5WpX1YmLmxMVhb1GQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ventanamicro.com; spf=pass smtp.mailfrom=ventanamicro.com; dkim=pass (2048-bit key) header.d=ventanamicro.com header.i=@ventanamicro.com header.b=TRCG13yf; arc=none smtp.client-ip=209.85.214.176 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ventanamicro.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ventanamicro.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ventanamicro.com header.i=@ventanamicro.com header.b="TRCG13yf" Received: by mail-pl1-f176.google.com with SMTP id d9443c01a7336-244581cc971so50003415ad.2 for ; Mon, 18 Aug 2025 07:36:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; t=1755527806; x=1756132606; 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=GPRfWRSPn2MXzdkFqXMoQyh3+o3vsKMsh/EYBelfV4w=; b=TRCG13yfcxRWuKagNJbN9swhxqua70XJ2WSWKcHzN78W0hDpsll6lZWx0Jwm9TTgsN AdEbkoDUORKsVEyDf95eVBxikFJ6bjUDjZDvfnUUukCeZv22+8bBGVkBdNuYIx3d7y/E DnDTCXjUPG+1sVJ155zELucUxDaFWN/Kz/N02n7jl8hI4WLjgfhMgs3816qeXoYLo6ii mWcRg5Q4hBo9SzIipKvVwnKdCi5mbHfhU4giXgV6bc+7olKYiLgSL4m+4Ael7PZ+NK0X OdwNmX5dGmG6Ahm6IXN349GlwnDi3te/4b8pqijh7hWwfZ8QjkzTuyohMS8q21FE92ue HJcg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1755527806; x=1756132606; 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=GPRfWRSPn2MXzdkFqXMoQyh3+o3vsKMsh/EYBelfV4w=; b=kOpKR7xUwUOv9PijVuhOOK6YFpUwrKQZ4CCCpZ60GyYwguwZCMEsu5DYG8K3d6lQ2l CikS5V1Z2wQI27WnGQ5lduopBVEVRFjXDU3cK4y+5J949NE8Num6NCWTsbOHxYtTcuuO FQZHr553WxY+v79/KED3laFZJxb/+jRg1UHBa2yWR5lmi1ZlExQ7RiOPdryDBkLtorrP sHe1ski/GL06hSYA0NofukqwlL8W6XUW6lf9UlUFTia5XbdHYRh6DGrQwId2m9xgEvwu 1qvK6Dfe6K/If2gmaKZxqSCSpbXUDlVaogUAzi8Y+rfvcqV4PWcU0anwuykao+SrEQTK zUGg== X-Forwarded-Encrypted: i=1; AJvYcCV3XzCW5d64Bi5fQkXxUOlwKblY7RnFO8aWdOFQ848nwi97TFdExYayc7NN8Odiw6dA2OMPtoae+qeB15Q=@vger.kernel.org X-Gm-Message-State: AOJu0YxDvga1Y5zWu6FvqAtfnb3NerXWNA2y3PrsQsTWGq9MjJJJ5ecI dRGYl97B2kYWCU5YVvoq6HZDibzsZ1JQ3RC/virE01ilKNsZVLwKXYfny22KVzoDzRY= X-Gm-Gg: ASbGncsNx10cf0QVmfO399nyr6F5hGYRbfVtwaAPWJpisrGLJQfEZ5TdiggEWL/aEmc slzZIpJz1V+EuEUsCpLMD6cU1IzWawBy5989z/JVeKinkZfuVPiVKzhqoPlB18BXOIS+XaeP/S8 eNxuLbKmX9akRwzSt9naM+xxzOHTIf4BLvc9sEsBnV1XiT4wIxpd+mkeMuhCa+olDH6pUHz3ckV h6GsQdFpbI9+UL0Yh190A+RKk+j6RQwdPNG5FjBtt/f7LActx9W8yEUa6w/RjwonNVWoesCbKDW eP5bkDgoUgrwr59nGSU2G9l7qaK2QWIN9Y82O/OKesV8vtyH2FC5cvi/KdBV19ZT9PXeaWL4ug/ v2vtqhFjEuW4q45fs/1W6wK+Yn2Skx/yV3z58yH1vSeDHmxhwj7cm53s= X-Google-Smtp-Source: AGHT+IFhQIGFe+ChK7vTdpEKuwo8wR5gEcJq/HqOaD2XkCBquPT7zD28uoL27+VgjZiGEpkXOMVA2A== X-Received: by 2002:a17:903:186:b0:240:3ed3:13e7 with SMTP id d9443c01a7336-2446d9699aamr152591495ad.42.1755527806186; Mon, 18 Aug 2025 07:36:46 -0700 (PDT) Received: from localhost.localdomain ([122.171.22.169]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2446d50f664sm81704945ad.75.2025.08.18.07.36.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 Aug 2025 07:36:45 -0700 (PDT) From: Anup Patel To: Sunil V L , "Rafael J . Wysocki" Cc: Palmer Dabbelt , Paul Walmsley , Alexandre Ghiti , Len Brown , Atish Patra , Andrew Jones , Anup Patel , Will Deacon , Mark Rutland , linux-acpi@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Anup Patel Subject: [PATCH v2 0/2] Common csr_read_num() and csr_write_num() for RISC-V Date: Mon, 18 Aug 2025 20:05:58 +0530 Message-ID: <20250818143600.894385-1-apatel@ventanamicro.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Some of the RISC-V drivers (such as RISC-V PMU and ACPI CPPC) need to access CSR based on CSR number discovered from somewhere. Add common RISC-V csr_read_num() and csr_write_num() functions under arch/riscv for such drivers. These patches can be found in the riscv_csr_read_num_v2 branch at: https://github.com/avpatel/linux.git Changes since v1: - Make "out_err" mandatory for csr_read_num() and csr_write_num() in PATCH2 as suggested by Sunil and Drew. This also helps further simplify csr_read_num() and csr_write_num(). Anup Patel (2): ACPI: RISC-V: Fix FFH_CPPC_CSR error handling RISC-V: Add common csr_read_num() and csr_write_num() functions arch/riscv/include/asm/csr.h | 3 + arch/riscv/kernel/Makefile | 1 + arch/riscv/kernel/csr.c | 165 +++++++++++++++++++++++++++++++++++ drivers/acpi/riscv/cppc.c | 21 ++--- drivers/perf/riscv_pmu.c | 54 ++---------- 5 files changed, 186 insertions(+), 58 deletions(-) create mode 100644 arch/riscv/kernel/csr.c -- 2.43.0