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 E3664C433FE for ; Wed, 25 May 2022 12:28:55 +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:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=EU/OckNSsrkySnvImyMRlfjGgvp7ayAWBd9tJ6EaBww=; b=eZSxbIdi6lx9QV eeDp8lR98N0kpqOuMzSA4l/qmlCMEPCoLIRCzB15dkOS2Ep8JrChQPBMy1kwX8acrBWyA7RGAwlxj 7valwmXdPMGqU3pxnz9yidvsjmSF4QrKrn3xLdwK7LQq5YjT9xDR/Pu4ZOLVWIujKsS69wP/kGjta TuHwiWWcfgBI+AyLZvVKrIBt7yUMbaohr3gr3pxXFBNOs+HelV11n6pZtAR5/PKfEvE/DkKZr/McS PKh4Ok58cFiXhGdhkhcTFulwiZtyRvnuUZvU1jF1HHnBNWDUxAcU12qFUwAN2GWaxEvlEactAqquj P7RvyRsaP5giHap2CIzA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ntq71-00B5Yn-0l; Wed, 25 May 2022 12:27:39 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ntq6x-00B5XO-Gd for linux-arm-kernel@lists.infradead.org; Wed, 25 May 2022 12:27:37 +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 175201FB; Wed, 25 May 2022 05:27:30 -0700 (PDT) Received: from FVFF77S0Q05N (unknown [10.57.0.228]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 24A533F73D; Wed, 25 May 2022 05:27:28 -0700 (PDT) Date: Wed, 25 May 2022 13:27:23 +0100 From: Mark Rutland To: "Wangshaobo (bobo)" Cc: Steven Rostedt , cj.chengjian@huawei.com, huawei.libin@huawei.com, xiexiuqi@huawei.com, liwei391@huawei.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, catalin.marinas@arm.com, will@kernel.org, zengshun.wu@outlook.com Subject: Re: [RFC PATCH -next v2 3/4] arm64/ftrace: support dynamically allocated trampolines Message-ID: References: <20220316100132.244849-1-bobo.shaobowang@huawei.com> <20220316100132.244849-4-bobo.shaobowang@huawei.com> <20220421100639.03c0d123@gandalf.local.home> <20220421114201.21228eeb@gandalf.local.home> <8f36ebd2-2c56-d896-3a91-c97a5760b344@huawei.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <8f36ebd2-2c56-d896-3a91-c97a5760b344@huawei.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220525_052735_690897_4D8440D8 X-CRM114-Status: GOOD ( 48.18 ) 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 T24gVGh1LCBNYXkgMDUsIDIwMjIgYXQgMTA6NTc6MzVBTSArMDgwMCwgV2FuZ3NoYW9ibyAoYm9i bykgd3JvdGU6Cj4gCj4g6ZSf5pak5ou3IDIwMjIvNC8yMiAwOjI3LCBNYXJrIFJ1dGxhbmQg5YaZ 6ZSf5pak5ou3Ogo+ID4gT24gVGh1LCBBcHIgMjEsIDIwMjIgYXQgMTE6NDI6MDFBTSAtMDQwMCwg U3RldmVuIFJvc3RlZHQgd3JvdGU6Cj4gPiA+IE9uIFRodSwgMjEgQXByIDIwMjIgMTY6MTQ6MTMg KzAxMDAKPiA+ID4gTWFyayBSdXRsYW5kIDxtYXJrLnJ1dGxhbmRAYXJtLmNvbT4gd3JvdGU6Cj4g PiA+IAo+ID4gPiA+ID4gTGV0J3Mgc2F5IHlvdSBoYXZlIDEwIGZ0cmFjZV9vcHMgcmVnaXN0ZXJl ZCAod2l0aCBicGYgYW5kIGtwcm9iZXMgdGhpcyBjYW4KPiA+ID4gPiA+IGJlIHF1aXRlIGNvbW1v bikuIEJ1dCBlYWNoIG9mIHRoZXNlIGZ0cmFjZV9vcHMgdHJhY2VzIGEgZnVuY3Rpb24gKG9yCj4g PiA+ID4gPiBmdW5jdGlvbnMpIHRoYXQgYXJlIG5vdCBiZWluZyB0cmFjZWQgYnkgdGhlIG90aGVy IGZ0cmFjZV9vcHMuIFRoYXQgaXMsIGVhY2gKPiA+ID4gPiA+IGZ0cmFjZV9vcHMgaGFzIGl0cyBv d24gdW5pcXVlIGZ1bmN0aW9uKHMpIHRoYXQgdGhleSBhcmUgdHJhY2luZy4gT25lIGNvdWxkCj4g PiA+ID4gPiBiZSB0cmFjaW5nIHNjaGVkdWxlLCB0aGUgb3RoZXIgY291bGQgYmUgdHJhY2luZyBr c29mdGlycWRfc2hvdWxkX3J1bgo+ID4gPiA+ID4gKHdoYXRldmVyKS4KPiA+ID4gPiBPaywgc28g dGhhdCdzIHdoZW4gbWVzc2luZyBhcm91bmQgd2l0aCBicGYgb3Iga3Byb2JlcywgYW5kIG5vdCBn ZW5lcmFsbHkKPiA+ID4gPiB3aGVuIHVzaW5nIHBsYWluIG9sZCBmdHJhY2UgZnVuY3Rpb25hbGl0 eSB1bmRlciAvc3lzL2tlcm5lbC90cmFjaW5nLwo+ID4gPiA+ICh1bmxlc3MgdGhhdCdzIGNvbmN1 cnJlbnQgd2l0aCBvbmUgb2YgdGhlIGZvcm1lciwgYXMgcGVyIHlvdXIgb3RoZXIKPiA+ID4gPiBy ZXBseSkgPwo+ID4gPiBJdCdzIGFueSB1c2VyIG9mIHRoZSBmdHJhY2UgaW5mcmFzdHJ1Y3R1cmUs IHdoaWNoIGluY2x1ZGVzIGtwcm9iZXMsIGJwZiwKPiA+ID4gcGVyZiwgZnVuY3Rpb24gdHJhY2lu ZywgZnVuY3Rpb24gZ3JhcGggdHJhY2luZywgYW5kIGFsc28gYWZmZWN0cyBpbnN0YW5jZXMuCj4g PiA+IAo+ID4gPiA+ID4gV2l0aG91dCB0aGlzIGNoYW5nZSwgYmVjYXVzZSB0aGUgYXJjaCBkb2Vz IG5vdCBzdXBwb3J0IGR5bmFtaWNhbGx5Cj4gPiA+ID4gPiBhbGxvY2F0ZWQgdHJhbXBvbGluZXMs IGl0IG1lYW5zIHRoYXQgYWxsIHRoZXNlIGZ0cmFjZV9vcHMgd2lsbCBiZQo+ID4gPiA+ID4gcmVn aXN0ZXJlZCB0byB0aGUgc2FtZSB0cmFtcG9saW5lLiBUaGF0IG1lYW5zLCBmb3IgZXZlcnkgZnVu Y3Rpb24gdGhhdCBpcwo+ID4gPiA+ID4gdHJhY2VkLCBpdCB3aWxsIGxvb3AgdGhyb3VnaCBhbGwg MTAgb2YgdGhlc2VzIGZ0cmFjZV9vcHMgYW5kIGNoZWNrIHRoZWlyCj4gPiA+ID4gPiBoYXNoZXMg dG8gc2VlIGlmIHRoZWlyIGNhbGxiYWNrIHNob3VsZCBiZSBjYWxsZWQgb3Igbm90Lgo+ID4gPiA+ IFN1cmU7IEkgY2FuIHNlZSBob3cgdGhhdCBjYW4gYmUgcXVpdGUgZXhwZW5zaXZlLgo+ID4gPiA+ IAo+ID4gPiA+IFdoYXQgSSdtIHRyeWluZyB0byBmaWd1cmUgb3V0IGlzIHdobyB0aGlzIG1hdHRl cnMgdG8gYW5kIHdoZW4sIHNpbmNlIHRoZQo+ID4gPiA+IGltcGxlbWVudGF0aW9uIGlzIGdvaW5n IHRvIGNvbWUgd2l0aCBhIGJ1bmNoIG9mIHN1YnRsZS9mcmFjdGFsCj4gPiA+ID4gY29tcGxleGl0 aWVzLCBhbmQgbGlrZWx5IGEgc3Vic3RhbnRpYWwgb3ZlcmhlYWQgdG9vIHdoZW4gZW5hYmxpbmcg b3IKPiA+ID4gPiBkaXNhYmxpbmcgdHJhY2luZyBvZiBhIHBhdGNoLXNpdGUuIEknZCBsaWtlIHRv IHVuZGVyc3RhbmQgdGhlIHRyYWRlLW9mZnMKPiA+ID4gPiBiZXR0ZXIuCj4gPiA+ID4gCj4gPiA+ ID4gPiBXaXRoIGR5bmFtaWNhbGx5IGFsbG9jYXRlZCB0cmFtcG9saW5lcywgZWFjaCBmdHJhY2Vf b3BzIHdpbGwgaGF2ZSB0aGVpciBvd24KPiA+ID4gPiA+IHRyYW1wb2xpbmUsIGFuZCB0aGF0IHRy YW1wb2xpbmUgd2lsbCBiZSBjYWxsZWQgZGlyZWN0bHkgaWYgdGhlIGZ1bmN0aW9uCj4gPiA+ID4g PiBpcyBvbmx5IGJlaW5nIHRyYWNlZCBieSB0aGUgb25lIGZ0cmFjZV9vcHMuIFRoaXMgaXMgbXVj aCBtb3JlIGVmZmljaWVudC4KPiA+ID4gPiA+IAo+ID4gPiA+ID4gSWYgYSBmdW5jdGlvbiBpcyB0 cmFjZWQgYnkgbW9yZSB0aGFuIG9uZSBmdHJhY2Vfb3BzLCB0aGVuIGl0IGZhbGxzIGJhY2sgdG8K PiA+ID4gPiA+IHRoZSBsb29wLgo+ID4gPiA+IEkgc2VlIC0tIHNvIHRoZSBkeW5hbWljIHRyYW1w b2xpbmUgaXMganVzdCB0byBnZXQgdGhlIG9wcz8gT3IgaXMgdGhhdAo+ID4gPiA+IGRvaW5nIGFk ZGl0aW9uYWwgdGhpbmdzPwo+ID4gPiBJdCdzIHRvIGdldCBib3RoIHRoZSBmdHJhY2Vfb3BzIChh cyB0aGF0J3Mgb25lIG9mIHRoZSBwYXJhbWV0ZXJzKSBhcyB3ZWxsCj4gPiA+IGFzIHRvIGNhbGwg dGhlIGNhbGxiYWNrIGRpcmVjdGx5LiBOb3Qgc3VyZSBpZiBhcm0gaXMgYWZmZWN0ZWQgYnkgc3Bl Y3RyZSwKPiA+ID4gYnV0IHRoZSAibG9vcCIgZnVuY3Rpb24gaXMgZmlsbGVkIHdpdGggaW5kaXJl Y3QgZnVuY3Rpb24gY2FsbHMsIHdoZXJlIGFzCj4gPiA+IHRoZSBkeW5hbWljIHRyYW1wb2xpbmVz IGNhbGwgdGhlIGNhbGxiYWNrIGRpcmVjdGx5Lgo+ID4gPiAKPiA+ID4gSW5zdGVhZCBvZjoKPiA+ ID4gCj4gPiA+ICAgIGJsIGZ0cmFjZV9jYWxsZXIKPiA+ID4gCj4gPiA+IGZ0cmFjZV9jYWxsZXI6 Cj4gPiA+ICAgIFsuLl0KPiA+ID4gICAgYmwgZnRyYWNlX29wc19saXN0X2Z1bmMKPiA+ID4gICAg Wy4uXQo+ID4gPiAKPiA+ID4gCj4gPiA+IHZvaWQgZnRyYWNlX29wc19saXN0X2Z1bmMoLi4uKQo+ ID4gPiB7Cj4gPiA+IAlfX2RvX2Zvcl9lYWNoX2Z0cmFjZV9vcHMob3AsIGZ0cmFjZV9vcHNfbGlz dCkgewo+ID4gPiAJCWlmIChmdHJhY2Vfb3BzX3Rlc3Qob3AsIGlwKSkgLy8gdGVzdCB0aGUgaGFz aCB0byBzZWUgaWYgaXQKPiA+ID4gCQkJCQkgICAgIC8vCXNob3VsZCB0cmFjZSB0aGlzCj4gPiA+ IAkJCQkJICAgICAvLwlmdW5jdGlvbi4KPiA+ID4gCQkJb3AtPmZ1bmMoLi4uKTsKPiA+ID4gCX0K PiA+ID4gfQo+ID4gPiAKPiA+ID4gSXQgZG9lczoKPiA+ID4gCj4gPiA+ICAgIGJsIGR5YW5taWNf dHJhbXAKPiA+ID4gCj4gPiA+IGR5bmFtaWNfdHJhbXA6Cj4gPiA+ICAgIFsuLl0KPiA+ID4gICAg YmwgZnVuYyAgLy8gY2FsbCB0aGUgb3AtPmZ1bmMgZGlyZWN0bHkhCj4gPiA+IAo+ID4gPiAKPiA+ ID4gTXVjaCBtb3JlIGVmZmljaWVudCEKPiA+ID4gCj4gPiA+IAo+ID4gPiA+IFRoZXJlIG1pZ2h0 IGJlIGEgbWlkZGxlLWdyb3VuZCBoZXJlIHdoZXJlIHdlIHBhdGNoIHRoZSBmdHJhY2Vfb3BzCj4g PiA+ID4gcG9pbnRlciBpbnRvIGEgbGl0ZXJhbCBwb29sIGF0IHRoZSBwYXRjaC1zaXRlLCB3aGlj aCB3b3VsZCBhbGxvdyB1cyB0bwo+ID4gPiA+IGhhbmRsZSB0aGlzIGF0b21pY2FsbHksIGFuZCB3 b3VsZCBhdm9pZCB0aGUgaXNzdWVzIHdpdGggb3V0LW9mLXJhbmdlCj4gPiA+ID4gdHJhbXBvbGlu ZXMuCj4gPiA+IEhhdmUgYW4gZXhhbXBsZSBvZiB3aGF0IHlvdSBhcmUgc3VnZ2VzdGluZz8KPiA+ IFdlIGNhbiBtYWtlIHRoZSBjb21waWxlciB0byBwbGFjZSAyIE5PUHMgYmVmb3JlIHRoZSBmdW5j dGlvbiBlbnRyeSBwb2ludCwgYW5kIDIKPiA+IE5PUHMgYWZ0ZXIgaXQgdXNpbmcgYC1mcGF0Y2hh YmxlLWZ1bmN0aW9uLWVudHJ5PTQsMmAgKHRoZSBhcmd1bWVudHMgYXJlCj4gPiA8dG90YWw+LDxi ZWZvcmU+KS4gT24gYXJtNjQgYWxsIGluc3RydWN0aW9ucyBhcmUgNCBieXRlcywgYW5kIHdlJ2xs IHVzZSB0aGUKPiA+IGZpcnN0IHR3byBOT1BzIGFzIGFuIDgtYnl0ZSBsaXRlcmFsIHBvb2wuCj4g PiAKPiA+IElnbm9yaW5nIEJUSSBmb3Igbm93LCB0aGUgY29tcGlsZXIgZ2VuZXJhdGVzICh3aXRo IHNvbWUgbWFnaWMgbGFiZWxzIGFkZGVkIGhlcmUKPiA+IGZvciBkZW1vbnN0cmF0aW9uKToKPiA+ IAo+ID4gCV9fYmVmb3JlX2Z1bmM6Cj4gPiAJCQlOT1AKPiA+IAkJCU5PUAo+ID4gCWZ1bmM6Cj4g PiAJCQlOT1AKPiA+IAkJCU5PUAo+ID4gCV9fcmVtYWluZGVyX29mX2Z1bmM6Cj4gPiAJCQkuLi4K PiA+IAo+ID4gQXQgZnRyYWNlX2luaXRfbm9wKCkgdGltZSB3ZSBwYXRjaCB0aGF0IHRvOgo+ID4g Cj4gPiAJX19iZWZvcmVfZnVuYzoKPiA+IAkJCS8vIHRyZWF0IHRoZSAyIE5PUHMgYXMgYW4gOC1i eXRlIGxpdGVyYWwtcG9vbAo+ID4gCQkJLnF1YWQJPGRlZmF1bHQgb3BzIHBvaW50ZXI+IC8vIHNl ZSBiZWxvdwo+ID4gCWZ1bmM6Cj4gPiAJCQlNT1YJWDksIFgzMAo+ID4gCQkJTk9QCj4gPiAJX19y ZW1haW5kZXJfb2ZfZnVuYzoKPiA+IAkJCS4uLgo+ID4gCj4gPiBXaGVuIGVuYWJsaW5nIHRyYWNp bmcgd2UgZG8KPiA+IAo+ID4gCV9fYmVmb3JlX2Z1bmM6Cj4gPiAJCQkvLyBwYXRjaCB0aGlzIHdp dGggdGhlIHJlbGV2YW50IG9wcyBwb2ludGVyCj4gPiAJCQkucXVhZAk8b3BzIHBvaW50ZXI+Cj4g PiAJZnVuYzoKPiA+IAkJCU1PVglYOSwgWDMwCj4gPiAJCQlCTAk8dHJhbXBvbGluZT4JLy8gY29t bW9uIHRyYW1wb2xpbmUKPiAKPiBJIGhhdmUgYSBxdWVzdGlvbiB0aGF0IGRvZXMgdGhpcyBjb21t b24gdHJhbXBvbGluZSBhbGxvY2F0ZWQgYnkKPiBtb2R1bGVfYWxsb2MoKT8gaWYgeWVzLCBob3cg dG8gaGFuZGxlIHRoZSBsb25nIGp1bXAgZnJvbSB0cmFjZWQgZnVuYyB0bwo+IGNvbW1vbiB0cmFt cG9saW5lIGlmIG9ubHkgYWRkaW5nIHR3byBOT1BzIGluIGZyb250IG9mIGZ1bmMuCgpObzsgYXMg dG9kYXkgdGhlcmUnZCBiZSAqb25lKiB0cmFtcG9saW5lIGluIHRoZSBtYWluIGtlcm5lbCBpbWFn ZSwgYW5kIHdoZXJlIGEKbW9kdWxlIGlzIG91dC1vZi1yYW5nZSBpdCB3aWxsIHVzZSBhIFBMVCB0 aGUgbW9kdWxlIGxvYWRlciBjcmVhdGVkIGF0IGxvYWQgdGltZQooYW5kIGFueSBwYXRjaC1zaXRl IGluIHRoYXQgbW9kdWxlIHdvdWxkIHVzZSB0aGUgc2FtZSBQTFQgYW5kIHRyYW1wb2xpbmUsCnJl Z2FyZGxlc3Mgb2Ygd2hhdCB0aGUgb3BzIHBvaW50ZXIgd2FzKS4KClRoZXJlIG1pZ2h0IGJlIGEg UExUIGJldHdlZW4gdGhlIGNhbGwgYW5kIHRoZSB0cmFtcG9saW5lLCBidXQgdGhhdCB3b3VsZG4n dApoYXZlIGFueSBmdW5jdGlvbmFsIGVmZmVjdDsgd2UnZCBzdGlsbCBnZXQgYWxsIHRoZSBhcmd1 bWVudHMsIHRoZSBvcmlnaW5hbCBMUgooaW4geDkpLCBhbmQgdGhlIGxvY2F0aW9uIG9mIHRoZSBj YWxsIChpbiB0aGUgTFIpLCBhcyB3ZSBnZXQgdG9kYXkuCgpGb3IgaG93IHdlIGRvIHRoYXQgdG9k YXksIHNlZSBjb21taXRzOgoKKiBlNzFhNGUxYmViYWY3ZmQ5ICgiYXJtNjQ6IGZ0cmFjZTogYWRk IHN1cHBvcnQgZm9yIGZhciBicmFuY2hlcyB0byBkeW5hbWljIGZ0cmFjZSIpCiAgaHR0cHM6Ly9n aXQua2VybmVsLm9yZy9wdWIvc2NtL2xpbnV4L2tlcm5lbC9naXQvdG9ydmFsZHMvbGludXguZ2l0 L2NvbW1pdC8/aWQ9ZTcxYTRlMWJlYmFmN2ZkOTkwZWZiZGMwNGIzOGU1NTI2OTE0ZjBmMQoKKiBm MWE1NGFlOWFmMGRhNGQ3ICgiYXJtNjQ6IG1vZHVsZS9mdHJhY2U6IGludGlhbGl6ZSBQTFQgYXQg bG9hZCB0aW1lIikKICBodHRwczovL2dpdC5rZXJuZWwub3JnL3B1Yi9zY20vbGludXgva2VybmVs L2dpdC90b3J2YWxkcy9saW51eC5naXQvY29tbWl0Lz9pZD1mMWE1NGFlOWFmMGRhNGQ3NjIzOTI1 NmVkNjQwYTkzYWIzYWFkYWMwCgoqIDNiMjNlNDk5MWZiNjZmNmQgKCJhcm02NDogaW1wbGVtZW50 IGZ0cmFjZSB3aXRoIHJlZ3MiKQogIGh0dHBzOi8vZ2l0Lmtlcm5lbC5vcmcvcHViL3NjbS9saW51 eC9rZXJuZWwvZ2l0L3RvcnZhbGRzL2xpbnV4LmdpdC9jb21taXQvP2lkPTNiMjNlNDk5MWZiNjZm NmQxNTJmOTA1NWVkZTI3MWE3MjZlZjlmMjEKClRoYW5rcywKTWFyay4KCl9fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxpbnV4LWFybS1rZXJuZWwgbWFpbGlu ZyBsaXN0CmxpbnV4LWFybS1rZXJuZWxAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMu aW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LWFybS1rZXJuZWwK