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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E940FC433F5 for ; Tue, 9 Nov 2021 11:33:34 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id B75FB61186 for ; Tue, 9 Nov 2021 11:33:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org B75FB61186 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id: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; 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Tue, 9 Nov 2021 03:32:10 -0800 (PST) Message-ID: <7213fdb0-b0ff-f851-87c6-7a55245cfcce@arm.com> Date: Tue, 9 Nov 2021 11:32:04 +0000 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:91.0) Gecko/20100101 Thunderbird/91.3.0 Subject: Re: Question: SMMUv3 PMU event aliasing Content-Language: en-GB To: John Garry , Leo Yan , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Cc: "linux-arm-kernel@lists.infradead.org" References: <20211108121941.GC1267967@leoy-ThinkPad-X240s> <8b24f36b-6459-c13c-bf19-b9f588eb6b8e@huawei.com> From: Robin Murphy In-Reply-To: <8b24f36b-6459-c13c-bf19-b9f588eb6b8e@huawei.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211109_033214_225773_1A1FA2A8 X-CRM114-Status: GOOD ( 24.62 ) 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-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gMjAyMS0xMS0wOCAxMjo0MSwgSm9obiBHYXJyeSB3cm90ZToKPiBPbiAwOC8xMS8yMDIxIDEy OjE5LCBMZW8gWWFuIHdyb3RlOgo+PiBIaSBKb2huLAo+Pgo+PiBbICsgbWFpbGluZyBsaXN0IF0K PiAKPiBIaSBMZW8sCj4gCj4+Cj4+IEknZCBsaWtlIHRvIGNvbmZpcm0gdGhlIGxhdGVzdCB1cHN0 cmVhbSBzdGF0dXMgZm9yIFNNTVV2MyBQTVUgZXZlbnQKPj4gYWxpYXNpbmcuCj4+Cj4+IEkgc2Vl IHRoZSBwYXRjaCBzZXQgdjYgb2YgInBlcmYgcG11LWV2ZW50czogU3VwcG9ydCBldmVudCBhbGlh c2luZyBmb3IKPj4gc3lzdGVtIFBNVXMiIFsxXSBoYXMgYmVlbiBsYW5kZWQgb24gdGhlIG1haW5s aW5lIGtlcm5lbCwgYW5kIGFzIGFuCj4+IGV4YW1wbGUsIGlteDhtbSBERFIgUE1VIGhhcyBiZWVu IHN1cHBvcnRlZCBhcyBzeXN0ZW0gUE1VIFsyXS4KPj4KPj4gT24gdGhlIG90aGVyIGhhbmQsIEkg Y2FuIHNlZSBwYXRjaCBzZXQgNSBjb250YWlucyB0aGUgU01NVXYzIFBNVSBldmVudAo+PiBhbGlh c2luZyB3aXRoIHBhdGNoICJwZXJmIHZlbmRvciBldmVudHMgYXJtNjQ6IEFkZCBBcmNoaXRlY3Rl ZCBldmVudHMKPj4gc21tdXYzLXBtY2cuanNvbiIgWzNdLCBidXQgdGhpcyBwYXRjaCB3YXMgbGVm dCBvdXQgaW4gcGF0Y2ggc2V0IDYgYW5kCj4+IGl0J3MgbmV2ZXIgbGFuZGVkIG9uIHRoZSBtYWlu bGluZSBrZXJuZWwuCj4+Cj4+IENvdWxkIHlvdSBzaGFyZSBjdXJyZW50IHN0YXR1cyAob3IgcGxh bikgZm9yIHVwc3RyZWFtaW5nIFNNTVV2MyBQTVUKPj4gZXZlbnQgYWxpYXM/wqAgT3IgaWYgdGhl cmUgaGF2ZSBhbnkgYmxvY2sgaXNzdWUgdG8gcHJldmVudCBtZXJnaW5nIHRoZQo+PiBjaGFuZ2Vz IGluIHRoZSBtYWlubGluZSBrZXJuZWw/Cj4gCj4gVGhpcyBmZWF0dXJlIHNob3VsZCBiZSBzdXBw b3J0ZWQgaW4gdGhlIFNNTVV2MyBQTVUga2VybmVsIGRyaXZlciBhbmQgCj4gcGVyZiB0b29sLgo+ IAo+IEhvd2V2ZXIgaXQgcmVsaWVzIG9uIHRoZSBTTU1VIFBNVSBpZGVudGlmaWVyIHN5c2ZzIGZp bGUgdG8gd29yay4gVGhpcyAKPiByZWxpZXMgb24gU01NVV9QTUNHX0lJRFIgYmVpbmcgc2V0LCB3 aGljaCBpcyBpbnRyb2R1Y2VkIGxhdGVzdCBzcGVjLCAKPiB3aGljaCBub3QgbXVjaCBIVyB3aWxs IHN1cHBvcnQgeWV0IC0gc2VlIGNvbW1pdCAyYzI1NTIyMzM2MmUuIEluIHRoZW9yeSAKPiB3ZSBk b24ndCBuZWVkIHRoYXQgZm9yIHRoZSBmaXhlZCwgbm9uLUlNUERFRiBldmVudHMsIGJ1dCBJIGRp ZCBub3QgCj4gY29tcGxpY2F0ZSBwZXJmIHRvb2wgd2l0aCB0aGF0IG1peGVkIHN1cHBvcnQuCj4g Cj4gVGhhdCdzIHRoZSByZWFzb24gZm9yIHdoaWNoIEkgcGF1c2VkIHNtbXV2My1wbWNnLmpzb24g dXBzdHJlYW0gaW4gWzNdLiBJIAo+IHdpbGwgcmV2aXZlIHRoYXQgZm9yIG5ldyBnZW4gSFcgd2hl biBjb25jcmV0ZSBJTVBERUYgZXZlbnRzIGtub3duIGFuZCAKPiBzaGFyZWQuCgpGV0lXLCBpbXAt ZGVmLWV2ZW50cyBhcmUgcmVhZGlseSBhdmFpbGFibGUgZm9yIHRoZSBleGlzdGluZyBBcm0gCmlt cGxlbWVudGF0aW9uc1sxXVsyXSwgYW5kIGFubm95aW5nbHkgd2UgY291bGQgdHJpdmlhbGx5IHN5 bnRoZXNpc2UgYW4gCklJRFIgdmFsdWUgZnJvbSB0aGVpciBpbXAtZGVmIFBJRFIgcmVnaXN0ZXJz IGlmIG9ubHkgd2Uga25ldyB0aGF0IHRoYXQgCndhcyB2YWxpZCB0byBkbyBpbiB0aGUgZmlyc3Qg cGxhY2UuIEkgZmVlbCB0ZW1wdGVkIG5vdyB0byByZXN1cnJlY3QgCkplYW4tUGhpbGlwcGUncyBE VCBiaW5kaW5nIGFuZCBoYXZlIGEgcXVpY2sgaGFjayBhdCB0aGF0LCB0aGVuIG1heWJlIGEgCm11 Y2ggbG9uZ2VyIHRoaW5rIGFib3V0IGhvdyB0byBhdHRlbXB0IGl0IGZvciBJT1JULi4uCgpDaGVl cnMsClJvYmluLgoKWzFdIApodHRwczovL2RldmVsb3Blci5hcm0uY29tL2RvY3VtZW50YXRpb24v MTAwMzEwLzAyMDIvRnVuY3Rpb25hbC1kZXNjcmlwdGlvbi9PcGVyYXRpb24vUGVyZm9ybWFuY2Ut TW9uaXRvcmluZy1Vbml0ClsyXSAKaHR0cHM6Ly9kZXZlbG9wZXIuYXJtLmNvbS9kb2N1bWVudGF0 aW9uLzEwMTU0Mi8wMDAxL0Z1bmN0aW9uYWwtZGVzY3JpcHRpb24vT3BlcmF0aW9uL1BlcmZvcm1h bmNlLU1vbml0b3JpbmctVW5pdAoKPiAKPiBUaGFua3MsCj4gSm9obgo+IAo+Pgo+PiBUaGFua3Mg Zm9yIHlvdXIgaGVscCEKPj4KPj4gTGVvCj4+Cj4+IFsxXSAKPj4gaHR0cHM6Ly9sb3JlLmtlcm5l bC5vcmcvbGttbC8xNjA3MDgwMjE2LTM2OTY4LTEtZ2l0LXNlbmQtZW1haWwtam9obi5nYXJyeUBo dWF3ZWkuY29tLyAKPj4KPj4gWzJdIHBtdS1ldmVudHMvYXJjaC9hcm02NC9mcmVlc2NhbGUvaW14 OG1tL3N5cy9kZHJjLmpzb24KPj4gWzNdIAo+PiBodHRwczovL2xvcmUua2VybmVsLm9yZy9sa21s LzE2MDQ2NjYxNTMtNDE4Ny02LWdpdC1zZW5kLWVtYWlsLWpvaG4uZ2FycnlAaHVhd2VpLmNvbS8g Cj4+Cj4+IC4KPj4KPiAKPiAKPiBfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fXwo+IGxpbnV4LWFybS1rZXJuZWwgbWFpbGluZyBsaXN0Cj4gbGludXgtYXJtLWtl cm5lbEBsaXN0cy5pbmZyYWRlYWQub3JnCj4gaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFp bG1hbi9saXN0aW5mby9saW51eC1hcm0ta2VybmVsCgpfX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1hcm0ta2VybmVsIG1haWxpbmcgbGlzdApsaW51 eC1hcm0ta2VybmVsQGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5v cmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1hcm0ta2VybmVsCg==