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 A418CC7EE2E for ; Fri, 9 Jun 2023 07:14:56 +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: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=yZGiahPgC0SkkqMfUG4irKMRIZawyAvuN2xtIvMbwgg=; b=TxYfncEyAN4QHs gwnYhZNlyXDGeStgYEfQRiFV6u3Fa8yQwU41mikXrkd8Egzn83V5yhhWRB5S3b4pSa2n+UfAjvnqj ALemz/y6rsNIKMib4sWe6XceFlnE/7U7FiomGJ8RuORpfg+QFACXa68DmZqd+BGxE3g51478JX51C fEQ3DwSwZZ8EmlxtKfo+g0n//ZBpv21y7puKyELKEFrjU+R9xrxQFUOO5LvXwWqMPjgLTnXa3sPPn U9/WBPqZJCmXpw4TYiggO6TW/eRWhK2EHEKwGe3RdhJvPK2/3o6DMD+aBQ/Mx9FYnvACoKAeOLwFz AaHGewu2LAm+D2IgFJtg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1q7WKP-00C0N7-2x; Fri, 09 Jun 2023 07:14:33 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1q7WKM-00C0Lj-1f for linux-arm-kernel@lists.infradead.org; Fri, 09 Jun 2023 07:14:32 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 43818AB6; Fri, 9 Jun 2023 00:15:08 -0700 (PDT) Received: from [10.163.44.201] (unknown [10.163.44.201]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id B954E3F71E; Fri, 9 Jun 2023 00:14:17 -0700 (PDT) Message-ID: <584cb976-4e21-5dc2-bce2-cd6c3b5d1613@arm.com> Date: Fri, 9 Jun 2023 12:44:12 +0530 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.11.0 Subject: Re: [PATCH V11 05/10] arm64/perf: Add branch stack support in ARMV8 PMU To: Suzuki K Poulose , Mark Rutland Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, will@kernel.org, catalin.marinas@arm.com, Mark Brown , James Clark , Rob Herring , Marc Zyngier , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , linux-perf-users@vger.kernel.org References: <20230531040428.501523-1-anshuman.khandual@arm.com> <20230531040428.501523-6-anshuman.khandual@arm.com> <290b577c-4740-d2e2-d236-c8bbe2f907b9@arm.com> Content-Language: en-US From: Anshuman Khandual In-Reply-To: <290b577c-4740-d2e2-d236-c8bbe2f907b9@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230609_001430_648945_CBF2834C X-CRM114-Status: UNSURE ( 8.32 ) X-CRM114-Notice: Please train this message. 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 Wy4uXQoKT24gNi84LzIzIDE1OjQzLCBTdXp1a2kgSyBQb3Vsb3NlIHdyb3RlOgo+Pj4gfCBzdGF0 aWMgaW50IGFybXY4cG11X3Byb2JlX3BtdShzdHJ1Y3QgYXJtX3BtdSAqY3B1X3BtdSkKPj4+IHwg ewo+Pj4gfMKgwqDCoMKgwqDCoMKgwqAgc3RydWN0IGFybXY4cG11X3Byb2JlX2luZm8gcHJvYmUg PSB7Cj4+PiB8wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgLnBtdSA9IGNwdV9wbXUs Cj4+PiB8wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgLnByZXNlbnQgPSBmYWxzZSwK Pj4+IHzCoMKgwqDCoMKgwqDCoMKgIH07Cj4+PiB8wqDCoMKgwqDCoMKgwqDCoCBpbnQgcmV0Owo+ Pj4gfAo+Pj4gfMKgwqDCoMKgwqDCoMKgwqAgcmV0ID0gc21wX2NhbGxfZnVuY3Rpb25fYW55KCZj cHVfcG11LT5zdXBwb3J0ZWRfY3B1cywKPj4+IHzCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgX19hcm12OHBtdV9w cm9iZV9wbXUsCj4+PiB8wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgICZwcm9iZSwgMSk7Cj4+PiB8wqDCoMKgwqDC oMKgwqDCoCBpZiAocmV0KQo+Pj4gfMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIHJl dHVybiByZXQ7Cj4+PiB8wqDCoMKgwqDCoMKgwqDCoCBpZiAoIXByb2JlLnByZXNlbnQpCj4+PiB8 wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgcmV0dXJuIC1FTk9ERVY7Cj4+PiB8Cj4+ PiB8wqDCoMKgwqDCoMKgwqDCoMKgwqAgaWYgKCFhcm1fcG11X2JyYW5jaF9zdGFja19zdXBwb3J0 ZWQoY3B1X3BtdSkpCj4+PiB8wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIHJldHVybiAwOwo+Pj4g fAo+Pj4gfMKgwqDCoMKgwqDCoMKgwqAgcmV0ID0gYXJtdjhwbXVfcHJpdmF0ZV9hbGxvYyhjcHVf cG11KTsKPj4+IHzCoMKgwqDCoMKgwqDCoMKgIGlmIChyZXQpCj4+PiB8wqDCoMKgwqDCoMKgwqDC oCByZXR1cm4gcmV0Owo+Pj4gfMKgwqDCoMKgwqDCoMKgCj4+PiB8wqDCoMKgwqDCoMKgwqDCoMKg IHJldCA9IGJyYW5jaF9yZWNvcmRzX2FsbG9jKGNwdV9wbXUpOwo+Pj4gfMKgwqDCoMKgwqDCoMKg wqDCoCBpZiAocmV0KQo+Pj4gfMKgwqDCoMKgwqDCoMKgwqDCoCBhcm12OHBtdV9wcml2YXRlX2Zy ZWUoY3B1X3BtdSk7Cj4+PiB8wqDCoMKgwqDCoMKgwqAKPj4+IHzCoMKgwqDCoMKgwqDCoCByZXR1 cm4gcmV0Owo+Pj4gfCB9CgoKQWZ0ZXIgc3BsaXR0aW5nIHRoZSB0YXNrIGN0eCBjYWNoZSBtYW5h Z2VtZW50IGZyb20gcG11IHByaXZhdGUgZGF0YQptYW5hZ2VtZW50LCB0aGUgYWJvdmUgZnVuY3Rp b24gd2lsbCBsb29rIHNvbWV0aGluZyBsaWtlIHRoaXMgdGFraW5nCmNhcmUgb2YgYWxsIGVycm9y IHBhdGggZnJlZWluZyBhcyB3ZWxsLgoKc3RhdGljIGludCBhcm12OHBtdV9wcm9iZV9wbXUoc3Ry dWN0IGFybV9wbXUgKmNwdV9wbXUpCnsKICAgICAgICBzdHJ1Y3QgYXJtdjhwbXVfcHJvYmVfaW5m byBwcm9iZSA9IHsKICAgICAgICAgICAgICAgIC5wbXUgPSBjcHVfcG11LAogICAgICAgICAgICAg ICAgLnByZXNlbnQgPSBmYWxzZSwKICAgICAgICB9OwogICAgICAgIGludCByZXQ7CgogICAgICAg IHJldCA9IGFybXY4cG11X3ByaXZhdGVfYWxsb2MoY3B1X3BtdSk7CiAgICAgICAgaWYgKHJldCkK ICAgICAgICAgICAgICAgIHJldHVybiByZXQ7CgogICAgICAgIHJldCA9IHNtcF9jYWxsX2Z1bmN0 aW9uX2FueSgmY3B1X3BtdS0+c3VwcG9ydGVkX2NwdXMsCiAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgIF9fYXJtdjhwbXVfcHJvYmVfcG11LAogICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAmcHJvYmUsIDEpOwogICAgICAgIGlmIChyZXQpCiAgICAgICAgICAgICAg ICBnb3RvIHByb2JlX2VycjsKCiAgICAgICAgaWYgKCFwcm9iZS5wcmVzZW50KSB7CiAgICAgICAg ICAgICAgICByZXQgPSAtRU5PREVWOwogICAgICAgICAgICAgICAgZ290byBwcm9iZV9lcnI7CiAg ICAgICAgfQoKICAgICAgICBpZiAoY3B1X3BtdS0+aGFzX2JyYW5jaF9zdGFjaykgewogICAgICAg ICAgICAgICAgcmV0ID0gYXJtdjhwbXVfdGFza19jdHhfY2FjaGVfYWxsb2MoY3B1X3BtdSk7CiAg ICAgICAgICAgICAgICBpZiAocmV0KQogICAgICAgICAgICAgICAgICAgICAgICBnb3RvIHByb2Jl X2VycjsKCiAgICAgICAgICAgICAgICByZXQgPSBicmFuY2hfcmVjb3Jkc19hbGxvYyhjcHVfcG11 KTsKICAgICAgICAgICAgICAgIGlmIChyZXQpIHsKICAgICAgICAgICAgICAgICAgICAgICAgYXJt djhwbXVfdGFza19jdHhfY2FjaGVfZnJlZShjcHVfcG11KTsKICAgICAgICAgICAgICAgICAgICAg ICAgZ290byBwcm9iZV9lcnI7CiAgICAgICAgICAgICAgICB9CiAgICAgICAgICAgICAgICByZXR1 cm4gMDsKICAgICAgICB9CiAgICAgICAgYXJtdjhwbXVfcHJpdmF0ZV9mcmVlKGNwdV9wbXUpOwog ICAgICAgIHJldHVybiAwOwoKcHJvYmVfZXJyOgogICAgICAgIGFybXY4cG11X3ByaXZhdGVfZnJl ZShjcHVfcG11KTsKICAgICAgICByZXR1cm4gcmV0Owp9CgpfX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1hcm0ta2VybmVsIG1haWxpbmcgbGlzdAps aW51eC1hcm0ta2VybmVsQGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVh ZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1hcm0ta2VybmVsCg==