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 2B651C433EF for ; Mon, 20 Jun 2022 02:06:11 +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-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; bh=UHfjht92XyzSlPa9e7R67LHqR9BIr66LJlrklthTUh4=; b=q1UNkvenuWBh8M wiVL5YCUMky9aNbu+/PFMwwoxeqL8mYtqbJOEU7wdcxiLMUY5HLuFE2wTiJtJakHl/VNvuCxexuN/ 7Cklf2ARzOtRnPdTZtYF8whPMLYjlkyDL8qz/2L3IKMeK9KSCBXXyDAtfjV3eXV0vYxLPI0N9Z+6w CVFMOs2wddPyDm++vJ8/ke/k7J9JOKGy0h4JyM9JyWYvjztmGttS36tyIYmzqCWmR/T9kys8iDDfE 2+NOgD8c35GED1/ZpuChnDEXrwXe8RuNJNe0a+ZxCVYkMtS2uNJeTKJPhbPOsPbLyaoPxZPDJ4pqk 9dQzQhnwXJInVRz2kQew==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o36mn-00FmGJ-K5; Mon, 20 Jun 2022 02:05:05 +0000 Received: from szxga02-in.huawei.com ([45.249.212.188]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o36mj-00FmEa-Tr for linux-arm-kernel@lists.infradead.org; Mon, 20 Jun 2022 02:05:03 +0000 Received: from dggemv703-chm.china.huawei.com (unknown [172.30.72.55]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4LRCYm60vHz922d; Mon, 20 Jun 2022 10:01:32 +0800 (CST) Received: from kwepemm600017.china.huawei.com (7.193.23.234) by dggemv703-chm.china.huawei.com (10.3.19.46) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Mon, 20 Jun 2022 10:04:44 +0800 Received: from [10.174.179.234] (10.174.179.234) by kwepemm600017.china.huawei.com (7.193.23.234) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Mon, 20 Jun 2022 10:04:43 +0800 Message-ID: <7d50dcb8-8a7c-5735-cd49-ad814fecf641@huawei.com> Date: Mon, 20 Jun 2022 10:04:42 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.8.0 Subject: Re: [PATCH -next v5 7/8] arm64: add uaccess to machine check safe To: Mark Rutland CC: James Morse , Andrew Morton , Thomas Gleixner , "Ingo Molnar" , Borislav Petkov , Robin Murphy , Dave Hansen , "Catalin Marinas" , Will Deacon , "Alexander Viro" , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , , "H . Peter Anvin" , , , , , Kefeng Wang , Xie XiuQi , Guohanjun References: <20220528065056.1034168-1-tongtiangen@huawei.com> <20220528065056.1034168-8-tongtiangen@huawei.com> From: Tong Tiangen In-Reply-To: X-Originating-IP: [10.174.179.234] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To kwepemm600017.china.huawei.com (7.193.23.234) X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220619_190502_343278_74D4BA57 X-CRM114-Status: GOOD ( 25.50 ) 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 CgrlnKggMjAyMi82LzE4IDE5OjM1LCBNYXJrIFJ1dGxhbmQg5YaZ6YGTOgo+IE9uIFNhdCwgSnVu IDE4LCAyMDIyIGF0IDA1OjI3OjQ1UE0gKzA4MDAsIFRvbmcgVGlhbmdlbiB3cm90ZToKPj4KPj4K Pj4g5ZyoIDIwMjIvNi8xNyAxNzowNiwgTWFyayBSdXRsYW5kIOWGmemBkzoKPj4+IE9uIFNhdCwg TWF5IDI4LCAyMDIyIGF0IDA2OjUwOjU1QU0gKzAwMDAsIFRvbmcgVGlhbmdlbiB3cm90ZToKPj4+ PiBJZiB1c2VyIGFjY2VzcyBmYWlsIGR1ZSB0byBoYXJkd2FyZSBtZW1vcnkgZXJyb3IsIG9ubHkg dGhlIHJlbGV2YW50Cj4+Pj4gcHJvY2Vzc2VzIGFyZSBhZmZlY3RlZCwgc28ga2lsbGluZyB0aGUg dXNlciBwcm9jZXNzIGFuZCBpc29sYXRlIHRoZQo+Pj4+IGVycm9yIHBhZ2Ugd2l0aCBoYXJkd2Fy ZSBtZW1vcnkgZXJyb3JzIGlzIGEgbW9yZSByZWFzb25hYmxlIGNob2ljZQo+Pj4+IHRoYW4ga2Vy bmVsIHBhbmljLgo+Pj4+Cj4+Pj4gU2lnbmVkLW9mZi1ieTogVG9uZyBUaWFuZ2VuIDx0b25ndGlh bmdlbkBodWF3ZWkuY29tPgo+Pj4KPj4+PiAtLS0KPj4+PiAgICBhcmNoL2FybTY0L2xpYi9jb3B5 X2Zyb21fdXNlci5TIHwgOCArKysrLS0tLQo+Pj4+ICAgIGFyY2gvYXJtNjQvbGliL2NvcHlfdG9f dXNlci5TICAgfCA4ICsrKystLS0tCj4+Pgo+Pj4gQWxsIG9mIHRoZXNlIGNoYW5nZXMgYXJlIHRv IHRoZSAqa2VybmVsKiBhY2Nlc3NlcyBwZXJmb3JtZWQgYXMgcGFydCBvZiBjb3B5Cj4+PiB0by9m cm9tIHVzZXIsIGFuZCBoYXZlIG5vdGhpbmcgdG8gZG8gd2l0aCB1c2Vyc3BhY2UsIHNvIGl0IGRv ZXMgbm90IG1ha2Ugc2Vuc2UKPj4+IHRvIG1hcmsgdGhlc2UgYXMgVUFDQ0VTUy4KPj4KPj4gWW91 IGhhdmUgYSBwb2ludC4gc28gdGhlcmUgaXMgbm8gbmVlZCB0byBtb2RpZnkgY29weV9mcm9tL3Rv X3VzZXIuUyBpbiB0aGlzCj4+IHBhdGNoIHNldC4KPiAKPiBDb29sLCB0aGFua3MuIElmIHRoaXMg cGF0Y2gganVzdCBoYXMgdGhlIGV4dGFibGUgY2hhbmdlLCB0aGF0J3MgZmluZSBieSBtZS4KPiAK Pj4+IERvIHdlICphY3R1YWxseSogbmVlZCB0byByZWNvdmVyIGZyb20gZmFpbHVlcyBvbiB0aGVz ZSBhY2Nlc3Nlcz8gTG9va2luZyBhdAo+Pj4gX2NvcHlfZnJvbV91c2VyKCksIHRoZSBrZXJuZWwg d2lsbCBpbW1lZGlhdGVseSBmb2xsb3cgdGhpcyB1cCB3aXRoIGEgbWVtc2V0KCkKPj4+IHRvIHRo ZSBzYW1lIGFkZHJlc3Mgd2hpY2ggd2lsbCBiZSBmYXRhbCBhbnl3YXksIHNvIHRoaXMgaXMgb25s eSBwdW50aW5nIHRoZQo+Pj4gZmFpbHVyZSBmb3IgYSBmZXcgaW5zdHJ1Y3Rpb25zLgo+Pgo+PiBJ ZiByZWNvdmVyeSBzdWNjZXNzLCBUaGUgdGFzayB3aWxsIGJlIGtpbGxlZCBhbmQgdGhlcmUgd2ls bCBiZSBubyBzdWJzZXF1ZW50Cj4+IG1lbXNldCgpLgo+IAo+IEkgZG9uJ3QgdGhpbmsgdGhhdCdz IHRydWUuCj4gCj4gSUlVQyBwZXIgdGhlIGxhc3QgcGF0Y2gsIGluIHRoZSBleGNlcHRpb24gaGFu ZGxlciB3ZSdsbCBhcHBseSB0aGUgZml4dXAgdGhlbgo+IGZvcmNlIGEgc2lnbmFsLiBUaGF0IGRv ZXNuJ3Qga2lsbCB0aGUgdGFzayBpbW1lZGlhdGVseSwgYW5kIHdlJ2xsIHJldHVybiBmcm9tCj4g dGhlIGV4Y2VwdGlvbiBoYW5kbGVyIGJhY2sgaW50byB0aGUgb3JpZ2luYWwgY29udGV4dCAod2l0 aCB0aGUgZml4dXAgYXBwbGllZCkuCj4gCgpjb3JyZWN0LgoKPiBUaGUgc3RydWN0dXJlIG9mIGNv cHlfZnJvbV91c2VyKCkgaXMKPiAKPiAJY29weV9mcm9tX3VzZXIodG8sIGZyb20sIG4pIHsKPiAJ CV9jb3B5X2Zyb21fdXNlcih0bywgZnJvbSwgbikgewo+IAkJCXJlcyA9IG47Cj4gCQkJcmVzID0g cmF3X2NvcHlfZnJvbV91c2VyKHRvLCBmcm9tLCBuKTsKPiAJCQlpZiAocmVzKQo+IAkJCQltZW1z ZXQodG8gKyAobiAtIHJlcyksIDAsIHJlcyk7Cj4gCQl9Cj4gCX0KPiAKPiBTbyB3aGVuIHRoZSBm aXh1cCBpcyBhcHBsaWVkIGFuZCByZXMgaW5kaWNhdGVzIHRoYXQgdGhlIGNvcHkgdGVybWluYXRl ZCBlYXJseSwKPiB0aGVyZSBpcyBhbiB1bmNvbmRpdGluYWwgbWVtc2V0KCkgYmVmb3JlIHRoZSBm YXRhbCBzaWduYWwgaXMgaGFuZGxlZCBpbiB0aGUKPiByZXR1cm4gdG8gdXNlcnNwYWNlIHBhdGgu Cgpjb3JyZWN0IGluIHRoaXMgc2NlbmFyaW8uCgpNeSBpZGVhIGlzIGFsc28gdmFsdWFibGUgaW4g bWFueSBvdGhlciBzY2VuYXJpb3MuCgo+IAo+Pj4gSWYgd2UgcmVhbGx5IG5lZWQgdG8gcmVjb3Zl ciBmcm9tIGNlcnRhaW4gYWNjZXNzZXMgdG8ga2VybmVsIG1lbW9yeSB3ZSBzaG91bGQKPj4+IGFk ZCBhIG5ldyBFWF9UWVBFX0tBQ0NFU1NfRVJSX1pFUk9fTUMgb3Igc2ltaWxhciwgYnV0IHdlIG5l ZWQgYSBzdHJvbmcKPj4+IHJhdGlvbmFsZSBhcyB0byB3aHkgdGhhdCdzIHVzZWZ1bC4gQXMgdGhp bmdzIHN0YW5kIEkgZG8gbm90IGJlbGVpdmUgaXQgbWFrZXMKPj4+IHNlbnNlIGZvciBjb3B5IHRv L2Zyb20gdXNlciBzcGVjaWZpY2FsbHkuCj4gCj4gWy4uLl0KPiAKPj4+PiBkaWZmIC0tZ2l0IGEv YXJjaC9hcm02NC9tbS9leHRhYmxlLmMgYi9hcmNoL2FybTY0L21tL2V4dGFibGUuYwo+Pj4+IGlu ZGV4IGMzMDFkY2Y2MzM1Zi4uOGNhOGQ5NjM5ZjlmIDEwMDY0NAo+Pj4+IC0tLSBhL2FyY2gvYXJt NjQvbW0vZXh0YWJsZS5jCj4+Pj4gKysrIGIvYXJjaC9hcm02NC9tbS9leHRhYmxlLmMKPj4+PiBA QCAtODYsMTAgKzg2LDEwIEBAIGJvb2wgZml4dXBfZXhjZXB0aW9uX21jKHN0cnVjdCBwdF9yZWdz ICpyZWdzKQo+Pj4+ICAgIAlpZiAoIWV4KQo+Pj4+ICAgIAkJcmV0dXJuIGZhbHNlOwo+Pj4+IC0J LyoKPj4+PiAtCSAqIFRoaXMgaXMgbm90IGNvbXBsZXRlLCBNb3JlIE1hY2hpbmUgY2hlY2sgc2Fm ZSBleHRhYmxlIHR5cGUgY2FuCj4+Pj4gLQkgKiBiZSBwcm9jZXNzZWQgaGVyZS4KPj4+PiAtCSAq Lwo+Pj4+ICsJc3dpdGNoIChleC0+dHlwZSkgewo+Pj4+ICsJY2FzZSBFWF9UWVBFX1VBQ0NFU1Nf RVJSX1pFUk86Cj4+Pj4gKwkJcmV0dXJuIGV4X2hhbmRsZXJfdWFjY2Vzc19lcnJfemVybyhleCwg cmVncyk7Cj4+Pj4gKwl9Cj4+Pgo+Pj4gVGhpcyBhZGRpdGlvbiBzcGVjaWZpY2FsbHkgbWFrZXMg c2Vuc2UgdG8gbWUsIHNvIGNhbiB5b3Ugc3BsaXQgdGhpcyBpbnRvIGEgc2VwYXJhdGUgcGF0Y2g/ Cj4+Cj4+IEFjY29yZGluZyB0byBteSB1bmRlcnN0YW5kaW5nIG9mIHRoZSBhYm92ZSwgb25seSB0 aGUgbW9kaWZpY2F0aW9uIG9mCj4+IGV4dGFibGUuYyBpcyByZXRhaW5lZC4KPj4KPj4gU28gd2hh dCBkbyB5b3UgbWVhbiB3aGljaCBwYXJ0IGlzIG1hZGUgaW50byBhIHNlcGFyYXRlIHBhdGNoPwo+ IAo+IEFzIGFib3ZlLCBpZiB5b3UganVzdCByZXRhaW4gdGhlIGV4dGFibGUuYyBjaGFuZ2VzLCB0 aGF0J3MgZmluZSBieSBtZS4KClRoYW5rcywKVG9uZy4KPiAKPiBUaGFua3MsCj4gTWFyay4KPiAu CgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1h cm0ta2VybmVsIG1haWxpbmcgbGlzdApsaW51eC1hcm0ta2VybmVsQGxpc3RzLmluZnJhZGVhZC5v cmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1hcm0t a2VybmVsCg==