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 8AF9FC77B73 for ; Mon, 5 Jun 2023 03:01:33 +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=GKDcZF6ub/Ohx/8WA5RBJzeewKkJoixZlLDkOqfONMk=; b=Us0rIMWgLaDqR0 BftNyBY9vkvfJNGb2UHC63BcbXVEo1g+Mnwoo6bUY7/qBkBafPLZgsz6gQ9mLTbTi7zpFH0IfzdKg d7rmSIt+11QcGavD3joGU2G4kTfwtezR+uULNQGQTSnxQtpOXSpXeBJUuUDVz0zWLNnUzJ6B/uxMB wwHg+fUC3tED51ecrLyEn8+M1yhnGb6UzLr2hRB0NqGUsuvjpblmkw9GVvpSf0cVvN8JxsBjnqLtI pbnzovU0PJeJpmGPKKO5FpyUNP71a2mWzm7HXPjDiUia54gHWjsvi/3YBjuzo1gUf/wiWe1dqx9C0 Fgfndqorh34gubgeqnyA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1q60T0-00Dqra-2B; Mon, 05 Jun 2023 03:01:10 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1q60Sx-00DqqW-3C for linux-arm-kernel@lists.infradead.org; Mon, 05 Jun 2023 03:01:09 +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 EAC13D75; Sun, 4 Jun 2023 20:01:48 -0700 (PDT) Received: from [10.162.41.6] (a077893.blr.arm.com [10.162.41.6]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 969373F663; Sun, 4 Jun 2023 20:00:58 -0700 (PDT) Message-ID: Date: Mon, 5 Jun 2023 08:30:55 +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 06/10] arm64/perf: Enable branch stack events via FEAT_BRBE Content-Language: en-US To: Namhyung Kim Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, will@kernel.org, catalin.marinas@arm.com, mark.rutland@arm.com, Mark Brown , James Clark , Rob Herring , Marc Zyngier , Suzuki Poulose , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , linux-perf-users@vger.kernel.org References: <20230531040428.501523-1-anshuman.khandual@arm.com> <20230531040428.501523-7-anshuman.khandual@arm.com> From: Anshuman Khandual In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230604_200108_124999_EBD21247 X-CRM114-Status: GOOD ( 22.88 ) 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 CgpPbiA2LzIvMjMgMDc6MTUsIE5hbWh5dW5nIEtpbSB3cm90ZToKPiBIZWxsbywKPiAKPiBPbiBU dWUsIE1heSAzMCwgMjAyMyBhdCA5OjIx4oCvUE0gQW5zaHVtYW4gS2hhbmR1YWwKPiA8YW5zaHVt YW4ua2hhbmR1YWxAYXJtLmNvbT4gd3JvdGU6Cj4+Cj4+IFRoaXMgZW5hYmxlcyBicmFuY2ggc3Rh Y2sgc2FtcGxpbmcgZXZlbnRzIGluIEFSTVY4IFBNVSwgdmlhIGFuIGFyY2hpdGVjdHVyZQo+PiBm ZWF0dXJlIEZFQVRfQlJCRSBha2EgYnJhbmNoIHJlY29yZCBidWZmZXIgZXh0ZW5zaW9uLiBUaGlz IGRlZmluZXMgcmVxdWlyZWQKPj4gYnJhbmNoIGhlbHBlciBmdW5jdGlvbnMgcG11djhwbXVfYnJh bmNoX1hYWFhYKCkgYW5kIHRoZSBpbXBsZW1lbnRhdGlvbiBoZXJlCj4+IGlzIHdyYXBwZWQgd2l0 aCBhIG5ldyBjb25maWcgb3B0aW9uIENPTkZJR19BUk02NF9CUkJFLgo+Pgo+PiBDYzogQ2F0YWxp biBNYXJpbmFzIDxjYXRhbGluLm1hcmluYXNAYXJtLmNvbT4KPj4gQ2M6IFdpbGwgRGVhY29uIDx3 aWxsQGtlcm5lbC5vcmc+Cj4+IENjOiBNYXJrIFJ1dGxhbmQgPG1hcmsucnV0bGFuZEBhcm0uY29t Pgo+PiBDYzogbGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQub3JnCj4+IENjOiBsaW51 eC1rZXJuZWxAdmdlci5rZXJuZWwub3JnCj4+IFRlc3RlZC1ieTogSmFtZXMgQ2xhcmsgPGphbWVz LmNsYXJrQGFybS5jb20+Cj4+IFNpZ25lZC1vZmYtYnk6IEFuc2h1bWFuIEtoYW5kdWFsIDxhbnNo dW1hbi5raGFuZHVhbEBhcm0uY29tPgo+PiAtLS0KPiAKPiBbU05JUF0KPj4gK3ZvaWQgYXJtdjhw bXVfYnJhbmNoX3JlYWQoc3RydWN0IHBtdV9od19ldmVudHMgKmNwdWMsIHN0cnVjdCBwZXJmX2V2 ZW50ICpldmVudCkKPj4gK3sKPj4gKyAgICAgICBzdHJ1Y3QgYnJiZV9od19hdHRyICpicmJlX2F0 dHIgPSAoc3RydWN0IGJyYmVfaHdfYXR0ciAqKWNwdWMtPnBlcmNwdV9wbXUtPnByaXZhdGU7Cj4+ ICsgICAgICAgdTY0IGJyYmZjciwgYnJiY3I7Cj4+ICsgICAgICAgaW50IGlkeCwgbG9vcDFfaWR4 MSwgbG9vcDFfaWR4MiwgbG9vcDJfaWR4MSwgbG9vcDJfaWR4MiwgY291bnQ7Cj4+ICsKPj4gKyAg ICAgICBicmJjciA9IHJlYWRfc3lzcmVnX3MoU1lTX0JSQkNSX0VMMSk7Cj4+ICsgICAgICAgYnJi ZmNyID0gcmVhZF9zeXNyZWdfcyhTWVNfQlJCRkNSX0VMMSk7Cj4+ICsKPj4gKyAgICAgICAvKiBF bnN1cmUgcGF1c2Ugb24gUE1VIGludGVycnVwdCBpcyBlbmFibGVkICovCj4+ICsgICAgICAgV0FS Tl9PTl9PTkNFKCEoYnJiY3IgJiBCUkJDUl9FTDFfRlpQKSk7Cj4+ICsKPj4gKyAgICAgICAvKiBQ YXVzZSB0aGUgYnVmZmVyICovCj4+ICsgICAgICAgd3JpdGVfc3lzcmVnX3MoYnJiZmNyIHwgQlJC RkNSX0VMMV9QQVVTRUQsIFNZU19CUkJGQ1JfRUwxKTsKPj4gKyAgICAgICBpc2IoKTsKPj4gKwo+ PiArICAgICAgIC8qIERldGVybWluZSB0aGUgaW5kaWNlcyBmb3IgZWFjaCBsb29wICovCj4+ICsg ICAgICAgbG9vcDFfaWR4MSA9IEJSQkVfQkFOSzBfSURYX01JTjsKPj4gKyAgICAgICBpZiAoYnJi ZV9hdHRyLT5icmJlX25yIDw9IEJSQkVfQkFOS19NQVhfRU5UUklFUykgewo+PiArICAgICAgICAg ICAgICAgbG9vcDFfaWR4MiA9IGJyYmVfYXR0ci0+YnJiZV9uciAtIDE7Cj4+ICsgICAgICAgICAg ICAgICBsb29wMl9pZHgxID0gQlJCRV9CQU5LMV9JRFhfTUlOOwo+PiArICAgICAgICAgICAgICAg bG9vcDJfaWR4MiA9IEJSQkVfQkFOSzBfSURYX01BWDsKPiAKPiBJcyB0aGlzIHRvIGRpc2FibGUg dGhlIGJhbmsxPyAgTWF5YmUgbmVlZCBhIGNvbW1lbnQuCgpTdXJlLCB3aWxsIGFkZCBhIGNvbW1l bnQuCgo+IAo+IAo+PiArICAgICAgIH0gZWxzZSB7Cj4+ICsgICAgICAgICAgICAgICBsb29wMV9p ZHgyID0gQlJCRV9CQU5LMF9JRFhfTUFYOwo+PiArICAgICAgICAgICAgICAgbG9vcDJfaWR4MSA9 IEJSQkVfQkFOSzFfSURYX01JTjsKPj4gKyAgICAgICAgICAgICAgIGxvb3AyX2lkeDIgPSBicmJl X2F0dHItPmJyYmVfbnIgLSAxOwo+PiArICAgICAgIH0KPiAKPiBUaGUgbG9vcDJfaWR4MSBpcyB0 aGUgc2FtZSBmb3IgYm90aCBjYXNlcy4gIE1heWJlIGJldHRlcgo+IHRvIG1vdmUgaXQgb3V0IG9m IHRoZSBpZiBzdGF0ZW1lbnQuCgpTdXJlLCB3aWxsIGRvIHRoZSBmb2xsb3dpbmcgY2hhbmdlIGFz IHN1Z2dlc3RlZCBidXQgd29uZGVyaW5nIHdoZXRoZXIgc2hvdWxkCnRoZSBjaGFuZ2UgYmUgaW1w bGVtZW50ZWQgZnJvbSB0aGlzIHBhdGNoIG9ud2FyZHMgb3IgaW4gdGhlIGxhdGVyIHBhdGNoIHRo YXQKYWRkcyBjYXB0dXJlX2JyYmVfcmVnc2V0KCkuCiAKLS0tIGEvZHJpdmVycy9wZXJmL2FybV9i cmJlLmMKKysrIGIvZHJpdmVycy9wZXJmL2FybV9icmJlLmMKQEAgLTU2LDEzICs1NiwxNCBAQCBz dGF0aWMgaW50IGNhcHR1cmVfYnJiZV9yZWdzZXQoc3RydWN0IGJyYmVfaHdfYXR0ciAqYnJiZV9h dHRyLCBzdHJ1Y3QgYnJiZV9yZWdzZQogICAgICAgIGludCBpZHgsIGNvdW50OwogCiAgICAgICAg bG9vcDFfaWR4MSA9IEJSQkVfQkFOSzBfSURYX01JTjsKKyAgICAgICBsb29wMl9pZHgxID0gQlJC RV9CQU5LMV9JRFhfTUlOOwogICAgICAgIGlmIChicmJlX2F0dHItPmJyYmVfbnIgPD0gQlJCRV9C QU5LX01BWF9FTlRSSUVTKSB7CiAgICAgICAgICAgICAgICBsb29wMV9pZHgyID0gYnJiZV9hdHRy LT5icmJlX25yIC0gMTsKLSAgICAgICAgICAgICAgIGxvb3AyX2lkeDEgPSBCUkJFX0JBTksxX0lE WF9NSU47CisKKyAgICAgICAgICAgICAgIC8qIERpc2FibGUgY2FwdHVyaW5nIHRoZSBiYW5rIDEg Ki8KICAgICAgICAgICAgICAgIGxvb3AyX2lkeDIgPSBCUkJFX0JBTkswX0lEWF9NQVg7CiAgICAg ICAgfSBlbHNlIHsKICAgICAgICAgICAgICAgIGxvb3AxX2lkeDIgPSBCUkJFX0JBTkswX0lEWF9N QVg7Ci0gICAgICAgICAgICAgICBsb29wMl9pZHgxID0gQlJCRV9CQU5LMV9JRFhfTUlOOwogICAg ICAgICAgICAgICAgbG9vcDJfaWR4MiA9IGJyYmVfYXR0ci0+YnJiZV9uciAtIDE7CiAgICAgICAg fQoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGludXgt YXJtLWtlcm5lbCBtYWlsaW5nIGxpc3QKbGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQu b3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYXJt LWtlcm5lbAo=