From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f53.google.com (mail-wm1-f53.google.com [209.85.128.53]) (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 3B407267381 for ; Thu, 13 Mar 2025 12:44:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.53 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741869861; cv=none; b=VwVc4ivuXOiEkEt690cqVq1/+3b5iEdDwXGaWAHePdRiZrZeOSonoPU/e2nwKyLtNTrpr/2PA4FPJsB6xx61M+RwWLPD8wamFyQ7AClqffhmjohHJ+wV/cP/VR8srtbeXhOLJo7l42ZHBntW7b3dZKuLKR8To49MKXwUUCh47p8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741869861; c=relaxed/simple; bh=EleUDN0p7TORHE0wSEwSE0kj+mfdR9PO/rSWsPpYYTw=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=C931trAEHRiUWgePGEs8EHqTC3nb1/9wMHJ8sa35D0s1Bjz3DN1zO+eZV5EqDurMjzvB8Yy3b/d01gqCYXjmbJ3BxyINCBLhep12+oBwIpEiYLlhS1nWLYWEbG4/UHi36nmmSHbpUFv/GPhSpKjPBunWZ0Wo0Tew7Z8ZQXm3OSs= 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=o/GrbqLC; arc=none smtp.client-ip=209.85.128.53 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="o/GrbqLC" Received: by mail-wm1-f53.google.com with SMTP id 5b1f17b1804b1-43d0782d787so8214175e9.0 for ; Thu, 13 Mar 2025 05:44:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; t=1741869857; x=1742474657; darn=vger.kernel.org; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date:from:to :cc:subject:date:message-id:reply-to; bh=p4eBilR3cQKKkUL6iTV1U2gPm+aqkc/I2/ErCrbp51A=; b=o/GrbqLCeyyu8Cw/4q1t9rjSCjvoqeKges7sjFAbL8xsEX4XHQpHVCLphDjin3B9OI bzH0u6lO2okzsgxF40lvXb5ECkMBJO6/cCjV6DKWv6Kglw7bDGRuvSQCrUntcbN9VjSS nQH0avWE+dP1UHHjTjRQ5e4RlCeU4leL0UL107u6LhJYTBUi7fey8r6o3xMEVgwBW+EB KFjWy39uxnnNuTrhFMFPiOvmuCqxhDcbXQ9U0Y1+4lHLBJ4+IX6f47JFGM0jPYQOYCiy 0VBR2fo1zX4/RvWsoHbsxtYsWV8x+Ja7FTK46XSHdb4t66myUDN/WnJX6+2lVUWsnuei WYpQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1741869857; x=1742474657; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=p4eBilR3cQKKkUL6iTV1U2gPm+aqkc/I2/ErCrbp51A=; b=SjWC00Tvg9E67oOdNCKB9EDVupslK9w05COfSwzh6+gap0fyKYWNtMMz39y0IV1Pe3 95hOyScRk3t1FA8HcdApOLg3UZO8NkeKY2So5gRtZJ8Mi6ES3bq47YOVYGmPigret2cr ZEkV5BP58x55Z8Gz9Et9KcBucV7sriQo8VIgnlKuI0ARFLzBR10vcUqvIoLUuU/wSYHP ozOGtTDneQASMtB1CLidTudXQ2m5Rx/TWaOxXMzuqQBWJsAJ3Hu0qPdOAD65kt64aGD7 ucRWER5vccwMp9ifd4oIC9V1rnJt9IsiWnJEdM2y9hJzy4LtJit5TsSYiILQ/xpiTfgu CX3w== X-Forwarded-Encrypted: i=1; AJvYcCVwi0G1kNQiI8ILpnzOj9x/P+l0EVbF+9zUtdzHcsE86CNKrrx/9EB9GSXq2MSNgrRzQ94TiVByc0Qs3gqNBZA=@vger.kernel.org X-Gm-Message-State: AOJu0YwzGYBiciTY9r8br8R24XznClFULk7iODnV6OLN1AdTPPP05WO4 mwcLVD7mngO39ulVF+fYFgzJy2/cAOprqIpTt/wvM+b/H9FcG81Q65V/nweefZ0= X-Gm-Gg: ASbGncuNoKVDoqWy0KjQbDyPp9nxj1B3R7dj0O/m78YNs+FZwog2Hq8qYp6Aih2aPi1 vJRvxKl8R4z7QNWiqBGhtRm4j4D9fZ1e5tSONssgjDALohHlSyeMqhEvWcICsa6vKqEsDOSgAjl ygHvaDasmadTp5aY7odopDDbK8nRABUiL3NktZKtovuO0nMEBjORPzabMroHNUNksKwlFJi7rGg Zjc5x5V9iecPw1c1VZsOrsbDzMpzE6surtc2T5ocXtFqJAybz42JrYCJyIQhNeLA54pg+VhYPfN aIV/9haV5QmDRc1o81B50sCV5mvuZX53BjnFclPVErs= X-Google-Smtp-Source: AGHT+IEVKvciONpN7IaLFK/qsTCvmNWqORyhjjKaAjaSuACjOZk+fDyP3VpTM/ig5PwqolpsjOd7kg== X-Received: by 2002:a05:6000:1a87:b0:391:1923:5a91 with SMTP id ffacd0b85a97d-39132dc4395mr17992640f8f.55.1741869857406; Thu, 13 Mar 2025 05:44:17 -0700 (PDT) Received: from localhost ([2a02:8308:a00c:e200::59a5]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-395c83b6e87sm2097439f8f.32.2025.03.13.05.44.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Mar 2025 05:44:16 -0700 (PDT) Date: Thu, 13 Mar 2025 13:44:16 +0100 From: Andrew Jones To: =?utf-8?B?Q2zDqW1lbnQgTMOpZ2Vy?= Cc: Paul Walmsley , Palmer Dabbelt , Anup Patel , Atish Patra , Shuah Khan , Jonathan Corbet , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-kselftest@vger.kernel.org, Samuel Holland Subject: Re: [PATCH v3 03/17] riscv: sbi: add SBI FWFT extension calls Message-ID: <20250313-ce439653d16b484dba6a8d3e@orel> References: <20250310151229.2365992-1-cleger@rivosinc.com> <20250310151229.2365992-4-cleger@rivosinc.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20250310151229.2365992-4-cleger@rivosinc.com> On Mon, Mar 10, 2025 at 04:12:10PM +0100, Clément Léger wrote: > Add FWFT extension calls. This will be ratified in SBI V3.0 hence, it is > provided as a separate commit that can be left out if needed. > > Signed-off-by: Clément Léger > --- > arch/riscv/kernel/sbi.c | 30 ++++++++++++++++++++++++++++-- > 1 file changed, 28 insertions(+), 2 deletions(-) > > diff --git a/arch/riscv/kernel/sbi.c b/arch/riscv/kernel/sbi.c > index 256910db1307..af8e2199e32d 100644 > --- a/arch/riscv/kernel/sbi.c > +++ b/arch/riscv/kernel/sbi.c > @@ -299,9 +299,19 @@ static int __sbi_rfence_v02(int fid, const struct cpumask *cpu_mask, > return 0; > } > > +static bool sbi_fwft_supported; > + > int sbi_fwft_get(u32 feature, unsigned long *value) > { > - return -EOPNOTSUPP; > + struct sbiret ret; > + > + if (!sbi_fwft_supported) > + return -EOPNOTSUPP; > + > + ret = sbi_ecall(SBI_EXT_FWFT, SBI_EXT_FWFT_GET, > + feature, 0, 0, 0, 0, 0); > + > + return sbi_err_map_linux_errno(ret.error); > } > > /** > @@ -314,7 +324,15 @@ int sbi_fwft_get(u32 feature, unsigned long *value) > */ > int sbi_fwft_set(u32 feature, unsigned long value, unsigned long flags) > { > - return -EOPNOTSUPP; > + struct sbiret ret; > + > + if (!sbi_fwft_supported) > + return -EOPNOTSUPP; > + > + ret = sbi_ecall(SBI_EXT_FWFT, SBI_EXT_FWFT_SET, > + feature, value, flags, 0, 0, 0); > + > + return sbi_err_map_linux_errno(ret.error); sbi_err_map_linux_errno() doesn't know about SBI_ERR_DENIED_LOCKED. > } > > struct fwft_set_req { > @@ -389,6 +407,9 @@ static int sbi_fwft_feature_local_set(u32 feature, unsigned long value, > int sbi_fwft_all_cpus_set(u32 feature, unsigned long value, unsigned long flags, > bool revert_on_fail) > { > + if (!sbi_fwft_supported) > + return -EOPNOTSUPP; > + > if (feature & SBI_FWFT_GLOBAL_FEATURE_BIT) > return sbi_fwft_set(feature, value, flags); > > @@ -719,6 +740,11 @@ void __init sbi_init(void) > pr_info("SBI DBCN extension detected\n"); > sbi_debug_console_available = true; > } > + if ((sbi_spec_version >= sbi_mk_version(2, 0)) && Should check sbi_mk_version(3, 0) > + (sbi_probe_extension(SBI_EXT_FWFT) > 0)) { > + pr_info("SBI FWFT extension detected\n"); > + sbi_fwft_supported = true; > + } > } else { > __sbi_set_timer = __sbi_set_timer_v01; > __sbi_send_ipi = __sbi_send_ipi_v01; > -- > 2.47.2 > Thanks, drew