From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8435BC02192 for ; Fri, 7 Feb 2025 09:24:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=9tiH9b+H/9t/xpf0NWHkN82z4SsEthrDvr6Ide4MKv0=; b=qoE6RTYSJH3v2V4b8cof3Iqxp1 Jq+eyJHxmSAl7XkizlZlD4oW6fv1wP0VWfco/pGKgP+HLeiUjwOVXE3o/0qx2lDd3tn//kOM0/chN LqhdE59z+/2G+ctfNNCGBvaLvNeB/miwodUgw/Yn9ffSbmh2CSl4hLqYlcDWvXX1sqbJfjJDg4A88 vF8hTkzLDg9CeHJn101SV9hP7OtYcCbG5VDhPDZ1Ct56F+Zo1LNsdPbnec1mubhxCdUStJqzHyEtX Z5tLE59fMjVRrSwLJsSxAryFSeyTYsP5kq9WzncKnxema7RBW3zYkwgqQWxZxG5VNhP+DvDN0YvLp tJo0A+aw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tgKaq-000000090Y1-3n93; Fri, 07 Feb 2025 09:24:12 +0000 Received: from mail-wm1-x332.google.com ([2a00:1450:4864:20::332]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tgKY7-00000009015-2emW for linux-arm-kernel@lists.infradead.org; Fri, 07 Feb 2025 09:21:25 +0000 Received: by mail-wm1-x332.google.com with SMTP id 5b1f17b1804b1-43690d4605dso12345805e9.0 for ; Fri, 07 Feb 2025 01:21:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20230601.gappssmtp.com; s=20230601; t=1738920082; x=1739524882; darn=lists.infradead.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=9tiH9b+H/9t/xpf0NWHkN82z4SsEthrDvr6Ide4MKv0=; b=O1txkBHNSd1QK67hQfE3AgzdRZIQw2VwGdDYknbqzz6fQ/6GblfNDH/3aemfBR4SFb GbLjp0MmnUKmL1ZGp/ItBFXQyyXaepBUHBTRTJS78Rg14shtvjnPR4MAvyj6c9zW4cJT 8J6o/4UVDJa/49+wqZEghmyy6N571JVU9Wa5uXwbw3aPlO33c4MT82IA7aSNWU2rsQCi z+zuc+0st2ymujGtF06+m48XNuL4p1qE+ZvVrykaebVEspP94jFCq8qkoH0I9UVRjFqZ TLaXI450tEaz0zEKbp7tPP5fF/SO1I04A4jCgZsgVB810TXmQHuQK4l+06U2hYaBBcC2 h/+g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1738920082; x=1739524882; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=9tiH9b+H/9t/xpf0NWHkN82z4SsEthrDvr6Ide4MKv0=; b=GKY4hIq64IP4WxHIcTIXlaGCc1ogx9ZUvovCfpDc/Qq5LT5WNntojZQOOPJ/zIcq44 nQuApkcIgI1Y0a4j6e7S+UcvPqThentfzq/Pt314ZmUOtr29ZXFGns+LieKI8Bqo0i/O QllAB411ePo+59rAbhnoxqBEpLDVgCQ8aSS79QKo7gb4rveqyplaRGIxSRWF7kmqMDeb Zzm4RKWM9Vf5etrVIaDWlfzuqhlWeehkIfSjW1WRJo+1beXd1nAbaelOf632eirAWG6f NXyuo0SfZfLd0f3zQ4EFbcLgbRBHv2e7A3g/PAL8YJESWatdByParVxpmACc59TAwLAH I4CA== X-Forwarded-Encrypted: i=1; AJvYcCVvIPwLo1nxUUyXv+qkUxsz+uRdsDflU4yPXrUREX867lSwwCQDecD4ERJKdpJANDjcsX/pygSAr5IHZ5H8xjQC@lists.infradead.org X-Gm-Message-State: AOJu0YxuJIiijZmQYEsHzCCrNF5U0/lPJj+uGaxSbISjkq0X2cgCejLH jzd4BKwvU/Ees5iSWP/OzTmcd3mlUQNIc695Mc9ck6ojhhUKnl4tqZNqRF5C9HY= X-Gm-Gg: ASbGncv2moQ8HrNGXhkH8PJmnUhyh6QpDHadSFdpKyebpX4hXSc+V3WPunyabSaSWeb u5xTmCc/YmEnidfEZkOf0UUi8BKMSuvtHBfyRu0B8bVKXH3HljXfTdr0gvu+xLmZyAgwIUC+NWw 7CMiFr5WZrmBS5fSym/vOf1n3aA0tU8ndlqvv5mr4Ycv2nbO1X6nJDLS9XdIJZm6llQyfUGTtUE YkJXJMFd7sWmROrZTOhPQjTpR2E3CRrFZ2quQ2aJRz3D/hjEfCssfSWI3YULQ4vL9CAX/8DbEal nTAOqtIg6Q4SMlvPLWFzbh1JPcAh0RRblH9kT+CJd9h4TQW5dVh7lj3KdNX9 X-Google-Smtp-Source: AGHT+IECWFH7U0mArd280iuB70Vnw8HZQHKBAtWHAu5Pk2zNKD95w0WIBx5nMCf9e60ecld/9uOCGw== X-Received: by 2002:a05:600c:3c9b:b0:436:5fc9:30ba with SMTP id 5b1f17b1804b1-439249c385cmr21219595e9.29.1738920082212; Fri, 07 Feb 2025 01:21:22 -0800 (PST) Received: from ?IPV6:2a01:e0a:e17:9700:16d2:7456:6634:9626? ([2a01:e0a:e17:9700:16d2:7456:6634:9626]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-439069290c7sm87180725e9.0.2025.02.07.01.21.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 07 Feb 2025 01:21:21 -0800 (PST) Message-ID: <7aace8a9-0e62-4156-9c50-f7b399c4eba2@rivosinc.com> Date: Fri, 7 Feb 2025 10:21:20 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 06/21] RISC-V: Add Smcntrpmf extension parsing To: Atish Patra , Paul Walmsley , Palmer Dabbelt , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Anup Patel , Atish Patra , Will Deacon , Mark Rutland , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , weilin.wang@intel.com Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Conor Dooley , devicetree@vger.kernel.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-perf-users@vger.kernel.org References: <20250205-counter_delegation-v4-0-835cfa88e3b1@rivosinc.com> <20250205-counter_delegation-v4-6-835cfa88e3b1@rivosinc.com> Content-Language: en-US From: =?UTF-8?B?Q2zDqW1lbnQgTMOpZ2Vy?= In-Reply-To: <20250205-counter_delegation-v4-6-835cfa88e3b1@rivosinc.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250207_012123_874892_C305F12B X-CRM114-Status: GOOD ( 16.32 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 06/02/2025 08:23, Atish Patra wrote: > Smcntrpmf extension allows M-mode to enable privilege mode filtering > for cycle/instret counters. However, the cyclecfg/instretcfg CSRs are > only available only in Ssccfg only Smcntrpmf is present. > > That's why, kernel needs to detect presence of Smcntrpmf extension and > enable privilege mode filtering for cycle/instret counters. > > Signed-off-by: Atish Patra > --- > arch/riscv/include/asm/hwcap.h | 1 + > arch/riscv/kernel/cpufeature.c | 1 + > 2 files changed, 2 insertions(+) > > diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h > index 3d6e706fc5b2..b4eddcb57842 100644 > --- a/arch/riscv/include/asm/hwcap.h > +++ b/arch/riscv/include/asm/hwcap.h > @@ -102,6 +102,7 @@ > #define RISCV_ISA_EXT_SVADU 93 > #define RISCV_ISA_EXT_SSCSRIND 94 > #define RISCV_ISA_EXT_SMCSRIND 95 > +#define RISCV_ISA_EXT_SMCNTRPMF 96 > > #define RISCV_ISA_EXT_XLINUXENVCFG 127 > > diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c > index c6da81aa48aa..8f225c9c3055 100644 > --- a/arch/riscv/kernel/cpufeature.c > +++ b/arch/riscv/kernel/cpufeature.c > @@ -390,6 +390,7 @@ const struct riscv_isa_ext_data riscv_isa_ext[] = { > __RISCV_ISA_EXT_BUNDLE(zvksg, riscv_zvksg_bundled_exts), > __RISCV_ISA_EXT_DATA(zvkt, RISCV_ISA_EXT_ZVKT), > __RISCV_ISA_EXT_DATA(smaia, RISCV_ISA_EXT_SMAIA), > + __RISCV_ISA_EXT_DATA(smcntrpmf, RISCV_ISA_EXT_SMCNTRPMF), > __RISCV_ISA_EXT_DATA(smcsrind, RISCV_ISA_EXT_SMCSRIND), > __RISCV_ISA_EXT_DATA(smmpm, RISCV_ISA_EXT_SMMPM), > __RISCV_ISA_EXT_SUPERSET(smnpm, RISCV_ISA_EXT_SMNPM, riscv_xlinuxenvcfg_exts), > Looks good to me. Reviewed-by: Clément Léger Thanks, Clément