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 18453C7618E for ; Sat, 29 Apr 2023 06:20:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:Subject:Message-ID:Date:From: In-Reply-To:References:MIME-Version:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=ZFgSDnO0vqrBCqPXXJ+vWDf++kPcRXJbs3zQZ+tHsPw=; b=krM45SZ8BmuPqg boLOhYTCWwRNneBYOQwAaziMDNYHtKR3QcPASmT3CGFqrbkrL8QVsJkqMZzGwb2yghTEeKP/sPQYn EgvptAZFjzJXPPe/pKZacfGvhIYIl6pd06EfixOES6Plo8iNqPdLVkIJVYkjjvKj8vzHW493UeXFP SAbsJ6DoAbJNzHjK9PfgwZa6nXW0bPXFDnPJM69HpPMkHmNAy0ENmZHlmo1gCwPXpvBFXYLb+cmoJ /khoyk0USwv2K4fHG1wnKVYQlWnzxiKSDpyH0Y9flreiCGY8A5aggK4aXxav3IP9j6q5WhW9tuli0 hBFiglIatBz6RZCW27fA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1psdvy-00CJHi-04; Sat, 29 Apr 2023 06:19:50 +0000 Received: from mail-pj1-x102f.google.com ([2607:f8b0:4864:20::102f]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1psdvu-00CJGt-2D for linux-arm-kernel@lists.infradead.org; Sat, 29 Apr 2023 06:19:48 +0000 Received: by mail-pj1-x102f.google.com with SMTP id 98e67ed59e1d1-24986ade373so698536a91.2 for ; Fri, 28 Apr 2023 23:19:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=atishpatra.org; s=google; t=1682749185; x=1685341185; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=yTMjDk3SOgiCPjxuLxhArxtC95/xlU4WSt6SJxU0e7Y=; b=XyLmSLRRw5vhwFunIep9bCU9Ptv8zJooq6+MLDBGrovDSvagRv6kBI6twD+YR78KiG BeEetk1c26wanqo2urmTL/brQ9DSTPDvQi403y65gx4fJSSvfG/Xk14q2glr2oRKHS/T h2ievV6hgV6lbgRlb6Vj2FQy/RghnjYGNW+f4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1682749185; x=1685341185; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=yTMjDk3SOgiCPjxuLxhArxtC95/xlU4WSt6SJxU0e7Y=; b=h7URvHS7xpQXXSocqlOA1HKc6TgLBnslH8g+TBQdzd8Zvz9g6E71cD+nL1hIoXdwXG 72Lv06tAjMN4Fq9Tc7Bg8eKfyXAsXyhGpYNINspyxMZqxgclU8auz+J/DINxnT6PwmHL p43KQAuLIRD6HBmGIbGK5s3oQkdOnt7iD1U62NREFmdpYgVPaz9kuDjExX9URu01GUuZ hedAoEcTrz4RkFDtjSXPvUHu/3LuO7jyZQ3L0EaEBEnmOmx/hLTi+oO77os3dWLPTgrr CWyaD/cN30a1IQhC77zeOmtUefHqEG+grBY+QBwvhBNNdnbywSlWKXbKWuegFNEM4abN mPvw== X-Gm-Message-State: AC+VfDx1IJ+ALAJa5zBELPK3YS0P3QgS0SJJ3diPICJvNNBaWZgcFMSD xucDrJ2k6b6GfZwUUCAtm77zOEw7A5QNMiHVniAd X-Google-Smtp-Source: ACHHUZ4LhwwR0e1B330AbEkd5AimnCzdBqVUhs/POzba4tZ0rYglv0TK7U3GChiM2m5G/Kut356agp6Sgo1hYtHMuJk= X-Received: by 2002:a17:90b:1b03:b0:246:681c:71fd with SMTP id nu3-20020a17090b1b0300b00246681c71fdmr7622447pjb.6.1682749184993; Fri, 28 Apr 2023 23:19:44 -0700 (PDT) MIME-Version: 1.0 References: <20230413161725.195417-1-alexghiti@rivosinc.com> <20230413161725.195417-5-alexghiti@rivosinc.com> <3bwxedsrovutzhlmlnozeuvz4zqnr32kuef2mdzmnbniajh6vb@we6jzlwkfuof> In-Reply-To: <3bwxedsrovutzhlmlnozeuvz4zqnr32kuef2mdzmnbniajh6vb@we6jzlwkfuof> From: Atish Patra Date: Sat, 29 Apr 2023 11:49:33 +0530 Message-ID: Subject: Re: [PATCH 4/4] riscv: Enable perf counters user access only through perf To: Andrew Jones Cc: Alexandre Ghiti , Jonathan Corbet , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Ian Rogers , Paul Walmsley , Palmer Dabbelt , Albert Ou , Anup Patel , Will Deacon , Rob Herring , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-riscv@lists.infradead.org, linux-arm-kernel@lists.infradead.org, David Abdurachmanov , Heinrich Schuchardt , Andreas Schwab , mafm@debian.org, aurel32@debian.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230428_231947_014082_E96DE2DD X-CRM114-Status: GOOD ( 36.54 ) 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: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gV2VkLCBBcHIgMjYsIDIwMjMgYXQgNjo1NeKAr1BNIEFuZHJldyBKb25lcyA8YWpvbmVzQHZl bnRhbmFtaWNyby5jb20+IHdyb3RlOgo+Cj4gT24gV2VkLCBBcHIgMjYsIDIwMjMgYXQgMDM6MTc6 MDFQTSArMDIwMCwgQWxleGFuZHJlIEdoaXRpIHdyb3RlOgo+ID4gT24gV2VkLCBBcHIgMjYsIDIw MjMgYXQgMjo1N+KAr1BNIEFuZHJldyBKb25lcyA8YWpvbmVzQHZlbnRhbmFtaWNyby5jb20+IHdy b3RlOgo+ID4gPgo+ID4gPiBPbiBUaHUsIEFwciAxMywgMjAyMyBhdCAwNjoxNzoyNVBNICswMjAw LCBBbGV4YW5kcmUgR2hpdGkgd3JvdGU6Cj4gPiA+ID4gV2UgdXNlZCB0byB1bmNvbmRpdGlvbm5h bGx5IGV4cG9zZSB0aGUgY3ljbGUgYW5kIGluc3RyZXQgY3NycyB0bwo+ID4gPiA+IHVzZXJzcGFj ZSwgd2hpY2ggZ2l2ZXMgcmlzZSB0byBzZWN1cml0eSBjb25jZXJucy4KPiA+ID4gPgo+ID4gPiA+ IFNvIG9ubHkgYWxsb3cgYWNjZXNzIHRvIGh3IGNvdW50ZXJzIGZyb20gdXNlcnNwYWNlIHRocm91 Z2ggdGhlIHBlcmYKPiA+ID4gPiBmcmFtZXdvcmsgd2hpY2ggd2lsbCBoYW5kbGUgY29udGV4dCBz d2l0Y2hzLCBwZXItdGFzayBldmVudHMuLi5ldGMuIEJ1dAo+ID4gPiA+IGFzIHdlIGNhbm5vdCBi cmVhayB1c2Vyc3BhY2UsIHdlIGdpdmUgdGhlIHVzZXIgdGhlIGNob2ljZSB0byBnbyBiYWNrIHRv Cj4gPiA+ID4gdGhlIHByZXZpb3VzIGJlaGF2aW91ciBieSBzZXR0aW5nIHRoZSBzeXNjdGwgcGVy Zl91c2VyX2FjY2Vzcy4KPiA+ID4gPgo+ID4gPiA+IFdlIGFsc28gaW50cm9kdWNlIGEgbWVhbnMg dG8gZGlyZWN0bHkgbWFwIHRoZSBoYXJkd2FyZSBjb3VudGVycyB0bwo+ID4gPiA+IHVzZXJzcGFj ZSwgdGh1cyBhdm9pZGluZyB0aGUgbmVlZCBmb3Igc3lzY2FsbHMgd2hlbmV2ZXIgYW4gYXBwbGlj YXRpb24KPiA+ID4gPiB3YW50cyB0byBhY2Nlc3MgY291bnRlcnMgdmFsdWVzLgo+ID4gPiA+Cj4g PiA+ID4gTm90ZSB0aGF0IGFyY2hfcGVyZl91cGRhdGVfdXNlcnBhZ2UgaXMgYSBjb3B5IG9mIGFy bTY0IGNvZGUuCj4gPiA+ID4KPiA+ID4gPiBTaWduZWQtb2ZmLWJ5OiBBbGV4YW5kcmUgR2hpdGkg PGFsZXhnaGl0aUByaXZvc2luYy5jb20+Cj4gPiA+ID4gLS0tCj4gPiA+ID4gIERvY3VtZW50YXRp b24vYWRtaW4tZ3VpZGUvc3lzY3RsL2tlcm5lbC5yc3QgfCAgMjMgKysrLQo+ID4gPiA+ICBhcmNo L3Jpc2N2L2luY2x1ZGUvYXNtL3BlcmZfZXZlbnQuaCAgICAgICAgIHwgICAzICsKPiA+ID4gPiAg YXJjaC9yaXNjdi9rZXJuZWwvTWFrZWZpbGUgICAgICAgICAgICAgICAgICB8ICAgMiArLQo+ID4g PiA+ICBhcmNoL3Jpc2N2L2tlcm5lbC9wZXJmX2V2ZW50LmMgICAgICAgICAgICAgIHwgIDY1ICsr KysrKysrKysrCj4gPiA+ID4gIGRyaXZlcnMvcGVyZi9yaXNjdl9wbXUuYyAgICAgICAgICAgICAg ICAgICAgfCAgNDIgKysrKysrKysKPiA+ID4gPiAgZHJpdmVycy9wZXJmL3Jpc2N2X3BtdV9sZWdh Y3kuYyAgICAgICAgICAgICB8ICAxNyArKysKPiA+ID4gPiAgZHJpdmVycy9wZXJmL3Jpc2N2X3Bt dV9zYmkuYyAgICAgICAgICAgICAgICB8IDExMyArKysrKysrKysrKysrKysrKystLQo+ID4gPiA+ ICBpbmNsdWRlL2xpbnV4L3BlcmYvcmlzY3ZfcG11LmggICAgICAgICAgICAgIHwgICAzICsKPiA+ ID4gPiAgdG9vbHMvbGliL3BlcmYvbW1hcC5jICAgICAgICAgICAgICAgICAgICAgICB8ICA2NSAr KysrKysrKysrKwo+ID4gPiA+ICA5IGZpbGVzIGNoYW5nZWQsIDMyMiBpbnNlcnRpb25zKCspLCAx MSBkZWxldGlvbnMoLSkKPiA+ID4gPiAgY3JlYXRlIG1vZGUgMTAwNjQ0IGFyY2gvcmlzY3Yva2Vy bmVsL3BlcmZfZXZlbnQuYwo+ID4gPiA+Cj4gPiA+ID4gZGlmZiAtLWdpdCBhL0RvY3VtZW50YXRp b24vYWRtaW4tZ3VpZGUvc3lzY3RsL2tlcm5lbC5yc3QgYi9Eb2N1bWVudGF0aW9uL2FkbWluLWd1 aWRlL3N5c2N0bC9rZXJuZWwucnN0Cj4gPiA+ID4gaW5kZXggNGI3YmZlYTI4Y2Q3Li4wMmIyYTQw YTM2NDcgMTAwNjQ0Cj4gPiA+ID4gLS0tIGEvRG9jdW1lbnRhdGlvbi9hZG1pbi1ndWlkZS9zeXNj dGwva2VybmVsLnJzdAo+ID4gPiA+ICsrKyBiL0RvY3VtZW50YXRpb24vYWRtaW4tZ3VpZGUvc3lz Y3RsL2tlcm5lbC5yc3QKPiA+ID4gPiBAQCAtOTQxLDE2ICs5NDEsMzEgQEAgZW5hYmxlZCwgb3Ro ZXJ3aXNlIHdyaXRpbmcgdG8gdGhpcyBmaWxlIHdpbGwgcmV0dXJuIGBgLUVCVVNZYGAuCj4gPiA+ ID4gIFRoZSBkZWZhdWx0IHZhbHVlIGlzIDguCj4gPiA+ID4KPiA+ID4gPgo+ID4gPiA+IC1wZXJm X3VzZXJfYWNjZXNzIChhcm02NCBvbmx5KQo+ID4gPiA+IC09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT0KPiA+ID4gPiArcGVyZl91c2VyX2FjY2VzcyAoYXJtNjQgYW5kIHJpc2N2IG9u bHkpCj4gPiA+ID4gKz09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQo+ID4g PiA+ICsKPiA+ID4gPiArQ29udHJvbHMgdXNlciBzcGFjZSBhY2Nlc3MgZm9yIHJlYWRpbmcgcGVy ZiBldmVudCBjb3VudGVycy4KPiA+ID4gPgo+ID4gPiA+IC1Db250cm9scyB1c2VyIHNwYWNlIGFj Y2VzcyBmb3IgcmVhZGluZyBwZXJmIGV2ZW50IGNvdW50ZXJzLiBXaGVuIHNldCB0byAxLAo+ID4g PiA+IC11c2VyIHNwYWNlIGNhbiByZWFkIHBlcmZvcm1hbmNlIG1vbml0b3IgY291bnRlciByZWdp c3RlcnMgZGlyZWN0bHkuCj4gPiA+ID4gK2FybTY0Cj4gPiA+ID4gKz09PT09Cj4gPiA+ID4KPiA+ ID4gPiAgVGhlIGRlZmF1bHQgdmFsdWUgaXMgMCAoYWNjZXNzIGRpc2FibGVkKS4KPiA+ID4gPiAr V2hlbiBzZXQgdG8gMSwgdXNlciBzcGFjZSBjYW4gcmVhZCBwZXJmb3JtYW5jZSBtb25pdG9yIGNv dW50ZXIgcmVnaXN0ZXJzCj4gPiA+ID4gK2RpcmVjdGx5Lgo+ID4gPiA+Cj4gPiA+ID4gIFNlZSBE b2N1bWVudGF0aW9uL2FybTY0L3BlcmYucnN0IGZvciBtb3JlIGluZm9ybWF0aW9uLgo+ID4gPiA+ Cj4gPiA+ID4gK3Jpc2N2Cj4gPiA+ID4gKz09PT09Cj4gPiA+ID4gKwo+ID4gPiA+ICtXaGVuIHNl dCB0byAwLCB1c2VyIGFjY2VzcyBpcyBkaXNhYmxlZC4KPiA+ID4gPiArCj4gPiA+ID4gK1doZW4g c2V0IHRvIDEsIHVzZXIgc3BhY2UgY2FuIHJlYWQgcGVyZm9ybWFuY2UgbW9uaXRvciBjb3VudGVy IHJlZ2lzdGVycwo+ID4gPiA+ICtkaXJlY3RseSBvbmx5IHRocm91Z2ggcGVyZiwgYW55IGRpcmVj dCBhY2Nlc3Mgd2l0aG91dCBwZXJmIGludGVydmVudGlvbiB3aWxsCj4gPiA+ID4gK3RyaWdnZXIg YW4gaWxsZWdhbCBpbnN0cnVjdGlvbi4KPiA+ID4gPiArCj4gPiA+ID4gK1RoZSBkZWZhdWx0IHZh bHVlIGlzIDIsIGl0IGVuYWJsZXMgdGhlIGxlZ2FjeSBtb2RlLCB0aGF0IGlzIHVzZXIgc3BhY2Ug aGFzCj4gPiA+ID4gK2RpcmVjdCBhY2Nlc3MgdG8gY3ljbGUsIHRpbWUgYW5kIGluc3JldCBDU1Jz IG9ubHkuCj4gPiA+Cj4gPiA+IEkgdGhpbmsgdGhpcyBkZWZhdWx0IHZhbHVlIHNob3VsZCBiZSBh IEtjb25maWcgc3ltYm9sLCBhbGxvd2luZyBrZXJuZWxzIHRvCj4gPiA+IGJlIGJ1aWx0IHdpdGgg YSBzZWN1cmUgZGVmYXVsdC4KPiA+Cj4gPiBBY3R1YWxseSBJIHdhcyBtb3JlIGluIGZhdm9yIG9m IGhhdmluZyB0aGUgZGVmYXVsdCB0byAxIChpZSB0aGUgc2VjdXJlCj4gPiBvcHRpb24pIGFuZCBs ZXQgdGhlIGRpc3Ryb3MgZGVhbCB3aXRoIHRoZSBsZWdhY3kgbW9kZSAodmlhIGEgc3lzY3RsCj4g PiBwYXJhbWV0ZXIgb24gdGhlIGNvbW1hbmQgbGluZSkgYXMgbG9uZyBhcyB1c2VyLXNwYWNlIGhh cyBub3QgYmVlbgo+ID4gZml4ZWQ6IGRvZXMgdGhhdCBtYWtlIHNlbnNlPwo+Cj4gWWVzLCBJJ2Qg cHJlZmVyIHRoYXQgdG9vLiBJIGFzc3VtZWQgdGhlIGRlZmF1bHQgd2FzIDIgaW4gdGhpcyBwYXRj aAo+IGJlY2F1c2Ugd2UgY291bGRuJ3Qgc2V0IGl0IHRvIDEgZm9yIHNvbWUgcmVhc29uLgo+CgpJ IHdvdWxkIHByZWZlciB0aGF0IHRvby4gSG93ZXZlciwgaXQgd2FzIHNldCB0byAyIGJlY2F1c2Ug aXQgd291bGQgYnJlYWsKdGhlIHVzZXIgc3BhY2UgYXBwbGljYXRpb24gZGVwZW5kaW5nIG9uIHRo ZSBsZWdhY3kgYmVoYXZpb3IgYXMgc29vbiBhcyB0aGUKcGF0Y2hlcyBhcmUgdXBzdHJlYW0uIFRo YXQgaXMgdGhlIHJlYXNvbgpwYWxtZXIgc3VnZ2VzdGVkIGtlZXBpbmcgdGhlIGRlZmF1bHQgdmFs dWUgdG8gMiBpbiBvcmRlciB0byBhdm9pZCB0aGF0LgoKK2Rpc3RybyBmb2xrcyAoY2MnZCkKSWYg dGhlIGRpc3RybyBtYWludGFpbmVyIGNhbiBjb25maXJtIHRoYXQgdGhpcyB3b3VsZCBiZSBhIG5v bi1pc3N1ZSwgSSBhbSBva2F5CndpdGggc2V0dGluZyB0aGUgZGVmYXVsdCB0byAxLgoKCj4gVGhh bmtzLAo+IGRyZXcKCgoKLS0gClJlZ2FyZHMsCkF0aXNoCgpfX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1hcm0ta2VybmVsIG1haWxpbmcgbGlzdAps aW51eC1hcm0ta2VybmVsQGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVh ZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1hcm0ta2VybmVsCg==