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Received: from DU2PR04MB8790.eurprd04.prod.outlook.com (2603:10a6:10:2e1::23) by DB8PR04MB7178.eurprd04.prod.outlook.com (2603:10a6:10:12e::20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6631.44; Tue, 1 Aug 2023 06:11:27 +0000 Received: from DU2PR04MB8790.eurprd04.prod.outlook.com ([fe80::e5cf:5743:ab60:b14e]) by DU2PR04MB8790.eurprd04.prod.outlook.com ([fe80::e5cf:5743:ab60:b14e%5]) with mapi id 15.20.6631.026; Tue, 1 Aug 2023 06:11:27 +0000 Message-ID: <41a2a27e-79d3-90e8-ca05-517c1626a740@suse.com> Date: Tue, 1 Aug 2023 08:11:25 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.13.1 Subject: Re: [PATCH] RISC-V: Add 'Smcntrpmf' extension and its CSRs Content-Language: en-US To: Nelson Chu Cc: binutils@sourceware.org, kito.cheng@sifive.com, palmer@dabbelt.com, christoph.muellner@vrull.eu, wuwei2016@iscas.ac.cn, shihua@iscas.ac.cn, shiyulong@iscas.ac.cn, chenyixuan@iscas.ac.cn, Jiawei References: <20230724052442.498966-1-jiawei@iscas.ac.cn> From: Jan Beulich In-Reply-To: Content-Type: text/plain; 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It adds two new 64-bits register mcyclecfg >> and minstretcfg that configure privilege mode filtering for the cycle >> and instret counters, respectively. Remove dropped CSRs that use the >> same CSR number with Smcntrpmf extension(mscounteren, mhcounteren). >> > > If we still want to support the privileged versions, then we should use > DECLARE_CSR_ALIAS for these kinds of the reused csrs. However, maybe it's > time that we should give up on supporting the multiple privileged versions > in binutils, and then support the newest one. That might work now, but going forward you won't be able to always only support the newest version, I suppose. Jan