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 E108AC04A95 for ; Sat, 24 Sep 2022 01:54:27 +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=HFPTPSbFiYoj6FjXz2C/ZkfrZU4hiPbq3PchlvVTHj4=; b=uPBEvor9bRZ2pw p7B7/FVOUK+c4GIc1PRMDPzU6X+xPIo+axiMbnW/uw/VMvrCfdM1sbjLf1JHzy1yhyu+4aeCSKzIT JoAMncfTbTmFAqbbUVatBld3BSG4iSuK9/3TerAKAPhUzE7OZJOpg1KTwAY8ZA9PnH+mXCdCYupxR MnpBq1yyK+aRJCp/DTetNTXkBwgFWy7/r+7WYWxCYCqPXAG2N/dUD6FvLnclctgU4Qq6x24dvGpNR 78Ebx2M4gDs6AgbYNx68j1bmGYrZEQQTjRedTaRbQbm169/bvAg1T7tqZr8aDmb3iEzMy+Z5oWOAX KXbVLaQ3ko+auQ3kGYWA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1obuLf-00674I-S9; Sat, 24 Sep 2022 01:52:55 +0000 Received: from szxga03-in.huawei.com ([45.249.212.189]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1obuLa-006721-Bw; Sat, 24 Sep 2022 01:52:53 +0000 Received: from kwepemi500012.china.huawei.com (unknown [172.30.72.57]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4MZBmT4r3qzHqM9; Sat, 24 Sep 2022 09:50:17 +0800 (CST) Received: from [10.67.110.108] (10.67.110.108) by kwepemi500012.china.huawei.com (7.221.188.12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Sat, 24 Sep 2022 09:52:29 +0800 Message-ID: <19ffdae6-8484-08e5-f408-ab39a97ce5c0@huawei.com> Date: Sat, 24 Sep 2022 09:52:28 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.4.0 Subject: Re: [PATCH 3/3] arm64/kprobe: Optimize the performance of patching single-step slot To: Mark Rutland CC: , , , , , , , , , , , , , References: <20220923084658.99304-1-liaochang1@huawei.com> <20220923084658.99304-4-liaochang1@huawei.com> From: "liaochang (A)" In-Reply-To: X-Originating-IP: [10.67.110.108] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To kwepemi500012.china.huawei.com (7.221.188.12) X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220923_185250_795309_01ADB29A X-CRM114-Status: GOOD ( 19.62 ) 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-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 CgrlnKggMjAyMi85LzIzIDIwOjM5LCBNYXJrIFJ1dGxhbmQg5YaZ6YGTOgo+IE9uIEZyaSwgU2Vw IDIzLCAyMDIyIGF0IDA0OjQ2OjU4UE0gKzA4MDAsIExpYW8gQ2hhbmcgd3JvdGU6Cj4+IFNpbmds ZS1zdGVwIHNsb3Qgd291bGQgbm90IGJlIHVzZWQgdW50aWwga3Byb2JlIGlzIGVuYWJsZWQsIHRo YXQgbWVhbnMKPj4gbm8gcmFjZSBjb25kaXRpb24gb2NjdXJzIG9uIGl0IHVuZGVyIFNNUCwgaGVu Y2UgaXQgaXMgc2FmZSB0byBwYWN0aCBzcwo+PiBzbG90IHdpdGhvdXQgc3RvcHBpbmcgbWFjaGlu ZS4KPiAKPiBJIHRoaW5rIHRoaXMgaXMgY29ycmVjdCwgYnV0IHRoaXMgZGVwZW5kcyBvbiBhIGNv dXBsZSBvZiBzdWJ0bGV0aWVzLAo+IGltcG9ydGFudGx5Ogo+IAo+ICogVGhhdCB0aGUgSS1jYWNo ZSBtYWludGVuYW5jZSBmb3IgdGhlc2UgaW5zdHJ1Y3Rpb25zIGlzIGNvbXBsZXRlICpiZWZvcmUq IHRoZQo+ICAga3Byb2JlIEJSSyBpcyB3cml0dGVuIChhbmQgYWFyY2g2NF9pbnNuX3BhdGNoX3Rl eHRfbm9zeW5jKCkgZW5zdXJlcyB0aGlzLCBidXQKPiAgIGp1c3Qgb21pdHMgY2F1c2luZyBhIENv bnRleHQtU3luY2hyb25pemF0aW9uLUV2ZW50IG9uIGFsbCBDUFVTKS4KClNvIGluIG9yZGVyIHRv IGd1YXJhbnRlZSB0aGUgSS1jYWNoZSBtYWludGVuYW5jZSBpcyBvYnNlcnZlZCBvbiBhbGwgQ1BV UywKaXQgbmVlZHMgdG8gYmUgZm9sbG93ZWQgYnkgYSBleHBsaWNpdCBDb250ZXh0LVN5bmNocm9u aXphdGlvbi1FdmVudCwgcGVyaGFwcwppdCBpcyBiZXR0ZXIgdG8gcGxhY2UgSVNCIGJlZm9yZSBr cHJvYmUgQlJLIGlzIHdyaXR0ZW4uCgo+IAo+ICogVGhhdCB0aGUga3Byb2JlIEJSSyByZXN1bHRz IGluIGFuIGV4Y2VwdGlvbiAoYW5kIGNvbnNlcXVlbnRseSBhCj4gICBDb250ZXh0LVN5bmNocm9u b2l6YXRpb24tRXZlbnQpLCB3aGljaCBlbnN1cmVzIHRoYXQgdGhlIENQVSB3aWxsIGZldGNoIHRo ZQo+ICAgc2luZ2xlLXN0ZXAgc2xvdCBpbnN0cnVjdGlvbnMgKmFmdGVyKiB0aGlzLCBlbnN1cmlu ZyB0aGF0IHRoZSBuZXcKPiAgIGluc3RydWN0aW9ucyBhcmUgdXNlZC4KClllcywgYmVjYXVzZSBv ZiBzaW5nbGUtc3RlcCBzbG90IGlzIGluc3RhbGxlZCBpbnQgdGhlIEJSSyBleGVjcHRpb24gaGFu ZGxlciwKc28gaXQgaXMgbm90IG5lY2Vzc2FyeSB0byBnZW5lcmF0ZSBDb250ZXh0LVN5bmNocm9u aXphdGlvbi1FdmVudCB2aWEgSVNCIG1lbnRpb25lZCBhYm92ZS4uLgoKVGhhbmtzLgoKPiAKPiBJ dCB3b3VsZCBiZSBnb29kIGlmIHdlIGNvdWxkIGNhbGwgdGhhdCBvdXQgZXhwbGljaXRseS4KPiAK PiBUaGFua3MsCj4gTWFyay4KPiAKPj4gU2luY2UgSSBhbmQgRCBjYWNoZXMgYXJlIGNvaGVyZW50 IHdpdGhpbiBzaW5nbGUtc3RlcCBzbG90IGZyb20KPj4gYWFyY2g2NF9pbnNuX3BhdGNoX3RleHRf bm9zeW5jKCksIGhlbmNlIG5vIG5lZWQgdG8gZG8gaXQgYWdhaW4gdmlhCj4+IGZsdXNoX2ljYWNo ZV9yYW5nZSgpLgo+Pgo+PiBBY2tlZC1ieTogTWFzYW1pIEhpcmFtYXRzdSAoR29vZ2xlKSA8bWhp cmFtYXRAa2VybmVsLm9yZz4KPj4gU2lnbmVkLW9mZi1ieTogTGlhbyBDaGFuZyA8bGlhb2NoYW5n MUBodWF3ZWkuY29tPgo+PiAtLS0KPj4gIGFyY2gvYXJtNjQva2VybmVsL3Byb2Jlcy9rcHJvYmVz LmMgfCA3ICsrLS0tLS0KPj4gIDEgZmlsZSBjaGFuZ2VkLCAyIGluc2VydGlvbnMoKyksIDUgZGVs ZXRpb25zKC0pCj4+Cj4+IGRpZmYgLS1naXQgYS9hcmNoL2FybTY0L2tlcm5lbC9wcm9iZXMva3By b2Jlcy5jIGIvYXJjaC9hcm02NC9rZXJuZWwvcHJvYmVzL2twcm9iZXMuYwo+PiBpbmRleCBkMWQx ODIzMjAyNDUuLjI5Yjk4YmMxMjgzMyAxMDA2NDQKPj4gLS0tIGEvYXJjaC9hcm02NC9rZXJuZWwv cHJvYmVzL2twcm9iZXMuYwo+PiArKysgYi9hcmNoL2FybTY0L2tlcm5lbC9wcm9iZXMva3Byb2Jl cy5jCj4+IEBAIC00NCwxMyArNDQsMTAgQEAgcG9zdF9rcHJvYmVfaGFuZGxlcihzdHJ1Y3Qga3By b2JlICosIHN0cnVjdCBrcHJvYmVfY3RsYmxrICosIHN0cnVjdCBwdF9yZWdzICopOwo+PiAgc3Rh dGljIHZvaWQgX19rcHJvYmVzIGFyY2hfcHJlcGFyZV9zc19zbG90KHN0cnVjdCBrcHJvYmUgKnAp Cj4+ICB7Cj4+ICAJa3Byb2JlX29wY29kZV90ICphZGRyID0gcC0+YWluc24uYXBpLmluc247Cj4+ IC0Jdm9pZCAqYWRkcnNbXSA9IHthZGRyLCBhZGRyICsgMX07Cj4+IC0JdTMyIGluc25zW10gPSB7 cC0+b3Bjb2RlLCBCUks2NF9PUENPREVfS1BST0JFU19TU307Cj4+ICAKPj4gIAkvKiBwcmVwYXJl IGluc24gc2xvdCAqLwo+PiAtCWFhcmNoNjRfaW5zbl9wYXRjaF90ZXh0KGFkZHJzLCBpbnNucywg Mik7Cj4+IC0KPj4gLQlmbHVzaF9pY2FjaGVfcmFuZ2UoKHVpbnRwdHJfdClhZGRyLCAodWludHB0 cl90KShhZGRyICsgTUFYX0lOU05fU0laRSkpOwo+PiArCWFhcmNoNjRfaW5zbl9wYXRjaF90ZXh0 X25vc3luYyhhZGRyLCBwLT5vcGNvZGUpOwo+PiArCWFhcmNoNjRfaW5zbl9wYXRjaF90ZXh0X25v c3luYyhhZGRyICsgMSwgQlJLNjRfT1BDT0RFX0tQUk9CRVNfU1MpOwo+PiAgCj4+ICAJLyoKPj4g IAkgKiBOZWVkcyByZXN0b3Jpbmcgb2YgcmV0dXJuIGFkZHJlc3MgYWZ0ZXIgc3RlcHBpbmcgeG9s Lgo+PiAtLSAKPj4gMi4xNy4xCj4+Cj4gCj4gLgoKLS0gCkJSLApMaWFvLCBDaGFuZwoKX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGludXgtYXJtLWtlcm5l bCBtYWlsaW5nIGxpc3QKbGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6 Ly9saXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYXJtLWtlcm5lbAo=