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 92A55C433EF for ; Fri, 25 Feb 2022 02:14:02 +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:MIME-Version:Date:Message-ID:From: References:Cc:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=A0obtMG/2Czwj0setd5nLfH1nHe4wCGvHiNPjD7U24I=; b=ph5azbfna6s+DeEH0M2zKJ2bFN t89qyv7teR8p2SI/nRGpiZUcI6hFq6QI/+i/CW9vjEFzBwG3OQQRZ76hgQl1XRxE72TE7qQq14DwC YFGZww+31Pth6U/gKV4aluQ4f+U2uWYeT/g3z7mvWx7i0q9QUajWRt5IbTPUpHATC2X5DoC0AH7rK Nbhm8hXyWNK9324vrj4ciUwOuEDVRiQRvKVUpRvZITHrVHzL+RdDrWnH7aGTSqpQnc9oNXTxwmUTr hshJWe80gsxjlzIzkdUqudqU7Yd3GIcPVXju2kWeRUQi2VzGeVFLWWB9TWY88HShxt85V0hQn0Fq0 EvDlq39g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nNQ6B-002yjO-Ib; Fri, 25 Feb 2022 02:12:47 +0000 Received: from mga03.intel.com ([134.134.136.65]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nNQ68-002yie-9g for linux-arm-kernel@lists.infradead.org; Fri, 25 Feb 2022 02:12:46 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1645755164; x=1677291164; h=subject:to:cc:references:from:message-id:date: mime-version:in-reply-to:content-transfer-encoding; bh=OjwBjKUhnyQUaR178VPG79ZiTP2RcSZHYXmNw8T4lRs=; b=IVciyNXR6IOxCTWktanyBvU804Zecgp/zHnSkpsDYfdgpPlOrgi39vYn uyQ9XnZ/cZ0udNzE1Dfb0JicwCAS2s2nS3b3n1NO1ynwIBBI2nv/dXqvI 6rr4eHGLpYXoan17CYEECUay5WfGnBMRmrWhEG2DiR1KjWYO/q7trhoE4 sxLTCXZoyGDC8nn0aW56hzJOBdreUa14X6eT5eOWj82BA/asrgeyChSkS V2OiSLaAmYAKRu0ZrZh6Rg+KCGAswGf2xhr2QEwyIpRpTlaKmBTCW5+qt sRWAMlw9IY1/hAbW/uKGeDYQqG8UcwPfjVgJ7XXD2rCUe4MNBdtGSd/OL Q==; X-IronPort-AV: E=McAfee;i="6200,9189,10268"; a="252320802" X-IronPort-AV: E=Sophos;i="5.90,134,1643702400"; d="scan'208";a="252320802" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Feb 2022 18:12:41 -0800 X-IronPort-AV: E=Sophos;i="5.90,134,1643702400"; d="scan'208";a="639958422" Received: from rongch2-mobl.ccr.corp.intel.com (HELO [10.255.31.203]) ([10.255.31.203]) by orsmga004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Feb 2022 18:12:34 -0800 Subject: Re: [kbuild-all] Re: [PATCH v2 6/9] KVM: arm64: Detect and handle hypervisor stack overflows To: Marc Zyngier , Ard Biesheuvel Cc: Kalesh Singh , kernel test robot , llvm@lists.linux.dev, kbuild-all@lists.01.org, Will Deacon , Quentin Perret , Fuad Tabba , surenb@google.com, Android Kernel Team , Catalin Marinas , James Morse , Alexandru Elisei , Suzuki K Poulose , Mark Rutland , Pasha Tatashin , Joey Gouly , Peter Collingbourne , Andrew Scull , Paolo Bonzini , Zenghui Yu , Linux ARM , Linux Kernel Mailing List , kvmarm References: <20220222165212.2005066-7-kaleshsingh@google.com> <202202231727.L621fVgD-lkp@intel.com> <875yp63ptg.wl-maz@kernel.org> <89c48bd2a9b32b4607d1515714fa3c1b@kernel.org> From: "Chen, Rong A" Message-ID: <16f47fa9-90b4-0b5c-33cb-cb004fc39266@intel.com> Date: Fri, 25 Feb 2022 10:12:32 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0 Thunderbird/78.12.0 MIME-Version: 1.0 In-Reply-To: <89c48bd2a9b32b4607d1515714fa3c1b@kernel.org> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220224_181244_428969_695D2F98 X-CRM114-Status: GOOD ( 23.83 ) 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 CgpPbiAyLzI0LzIwMjIgNjozOSBQTSwgTWFyYyBaeW5naWVyIHdyb3RlOgo+IE9uIDIwMjItMDIt MjMgMTI6NTYsIEFyZCBCaWVzaGV1dmVsIHdyb3RlOgo+PiBPbiBXZWQsIDIzIEZlYiAyMDIyIGF0 IDEzOjU0LCBNYXJjIFp5bmdpZXIgPG1hekBrZXJuZWwub3JnPiB3cm90ZToKPj4+Cj4+PiBPbiAy MDIyLTAyLTIzIDEyOjM0LCBQaGlsaXAgTGkgd3JvdGU6Cj4+PiA+IE9uIFdlZCwgRmViIDIzLCAy MDIyIGF0IDA5OjE2OjU5QU0gKzAwMDAsIE1hcmMgWnluZ2llciB3cm90ZToKPj4+ID4+IE9uIFdl ZCwgMjMgRmViIDIwMjIgMDk6MDU6MTggKzAwMDAsCj4+PiA+PiBrZXJuZWwgdGVzdCByb2JvdCA8 bGtwQGludGVsLmNvbT4gd3JvdGU6Cj4+PiA+PiA+Cj4+PiA+PiA+IEhpIEthbGVzaCwKPj4+ID4+ ID4KPj4+ID4+ID4gVGhhbmsgeW91IGZvciB0aGUgcGF0Y2ghIFBlcmhhcHMgc29tZXRoaW5nIHRv IGltcHJvdmU6Cj4+PiA+PiA+Cj4+PiA+PiA+IFthdXRvIGJ1aWxkIHRlc3QgV0FSTklORyBvbiAK Pj4+IGNmYjkyNDQwZWU3MWFkY2MyMTA1YjA4OTBiYjAxYWMzY2RkYjg1MDddCj4+PiA+PiA+Cj4+ PiA+PiA+IHVybDogICAgCj4+PiBodHRwczovL2dpdGh1Yi5jb20vMGRheS1jaS9saW51eC9jb21t aXRzL0thbGVzaC1TaW5naC9LVk0tYXJtNjQtSHlwZXJ2aXNvci1zdGFjay1lbmhhbmNlbWVudHMv MjAyMjAyMjMtMDEwNTIyIAo+Pj4KPj4+ID4+ID4gYmFzZTrCoMKgIGNmYjkyNDQwZWU3MWFkY2My MTA1YjA4OTBiYjAxYWMzY2RkYjg1MDcKPj4+ID4+ID4gY29uZmlnOiBhcm02NC1yYW5kY29uZmln LXIwMTEtMjAyMjAyMjEgCj4+PiAoaHR0cHM6Ly9kb3dubG9hZC4wMS5vcmcvMGRheS1jaS9hcmNo aXZlLzIwMjIwMjIzLzIwMjIwMjIzMTcyNy5MNjIxZlZnRC1sa3BAaW50ZWwuY29tL2NvbmZpZykg Cj4+Pgo+Pj4gPj4gPiBjb21waWxlcjogY2xhbmcgdmVyc2lvbiAxNS4wLjAgCj4+PiAoaHR0cHM6 Ly9naXRodWIuY29tL2xsdm0vbGx2bS1wcm9qZWN0IAo+Pj4gZDI3MWZjMDRkNWI5N2IxMmU2Yjc5 N2M2MDY3ZDNjOTZhOGQ3NDcwZSkKPj4+ID4+ID4gcmVwcm9kdWNlICh0aGlzIGlzIGEgVz0xIGJ1 aWxkKToKPj4+ID4+ID7CoMKgwqDCoMKgwqDCoMKgIHdnZXQgCj4+PiBodHRwczovL3Jhdy5naXRo dWJ1c2VyY29udGVudC5jb20vaW50ZWwvbGtwLXRlc3RzL21hc3Rlci9zYmluL21ha2UuY3Jvc3Mg Cj4+PiAtTyB+L2Jpbi9tYWtlLmNyb3NzCj4+PiA+PiA+wqDCoMKgwqDCoMKgwqDCoCBjaG1vZCAr eCB+L2Jpbi9tYWtlLmNyb3NzCj4+PiA+PiA+wqDCoMKgwqDCoMKgwqDCoCAjIGluc3RhbGwgYXJt NjQgY3Jvc3MgY29tcGlsaW5nIHRvb2wgZm9yIGNsYW5nIGJ1aWxkCj4+PiA+PiA+wqDCoMKgwqDC oMKgwqDCoCAjIGFwdC1nZXQgaW5zdGFsbCBiaW51dGlscy1hYXJjaDY0LWxpbnV4LWdudQo+Pj4g Pj4gPsKgwqDCoMKgwqDCoMKgwqAgIyAKPj4+IGh0dHBzOi8vZ2l0aHViLmNvbS8wZGF5LWNpL2xp bnV4L2NvbW1pdC83ZmU5OWZkNDBmN2M0YjI5NzMyMTgwNDVjYTViOWM5MTYwNTI0ZGIxIAo+Pj4K Pj4+ID4+ID7CoMKgwqDCoMKgwqDCoMKgIGdpdCByZW1vdGUgYWRkIGxpbnV4LXJldmlldyAKPj4+ IGh0dHBzOi8vZ2l0aHViLmNvbS8wZGF5LWNpL2xpbnV4Cj4+PiA+PiA+wqDCoMKgwqDCoMKgwqDC oCBnaXQgZmV0Y2ggLS1uby10YWdzIGxpbnV4LXJldmlldyAKPj4+IEthbGVzaC1TaW5naC9LVk0t YXJtNjQtSHlwZXJ2aXNvci1zdGFjay1lbmhhbmNlbWVudHMvMjAyMjAyMjMtMDEwNTIyCj4+PiA+ PiA+wqDCoMKgwqDCoMKgwqDCoCBnaXQgY2hlY2tvdXQgN2ZlOTlmZDQwZjdjNGIyOTczMjE4MDQ1 Y2E1YjljOTE2MDUyNGRiMQo+Pj4gPj4gPsKgwqDCoMKgwqDCoMKgwqAgIyBzYXZlIHRoZSBjb25m aWcgZmlsZSB0byBsaW51eCBidWlsZCB0cmVlCj4+PiA+PiA+wqDCoMKgwqDCoMKgwqDCoCBta2Rp ciBidWlsZF9kaXIKPj4+ID4+ID7CoMKgwqDCoMKgwqDCoMKgIENPTVBJTEVSX0lOU1RBTExfUEFU SD0kSE9NRS8wZGF5IENPTVBJTEVSPWNsYW5nIAo+Pj4gbWFrZS5jcm9zcyBXPTEgTz1idWlsZF9k aXIgQVJDSD1hcm02NCBTSEVMTD0vYmluL2Jhc2ggYXJjaC9hcm02NC8KPj4+ID4+ID4KPj4+ID4+ ID4gSWYgeW91IGZpeCB0aGUgaXNzdWUsIGtpbmRseSBhZGQgZm9sbG93aW5nIHRhZyBhcyBhcHBy b3ByaWF0ZQo+Pj4gPj4gPiBSZXBvcnRlZC1ieToga2VybmVsIHRlc3Qgcm9ib3QgPGxrcEBpbnRl bC5jb20+Cj4+PiA+PiA+Cj4+PiA+PiA+IEFsbCB3YXJuaW5ncyAobmV3IG9uZXMgcHJlZml4ZWQg YnkgPj4pOgo+Pj4gPj4gPgo+Pj4gPj4gPsKgwqDCoCBpbmNsdWRlL2xpbnV4L3N0ZGRlZi5oOjg6 MTQ6IG5vdGU6IGV4cGFuZGVkIGZyb20gbWFjcm8gJ05VTEwnCj4+PiA+PiA+wqDCoMKgICNkZWZp bmUgTlVMTCAoKHZvaWQgKikwKQo+Pj4gPj4gPsKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgIF5+fn5+fn5+fn5+Cj4+PiA+PiA+wqDCoMKgIGFyY2gvYXJtNjQva3ZtL2h5cC9udmhlL3N3 aXRjaC5jOjIwMDoyNzogd2FybmluZzogaW5pdGlhbGl6ZXIgCj4+PiBvdmVycmlkZXMgcHJpb3Ig aW5pdGlhbGl6YXRpb24gb2YgdGhpcyBzdWJvYmplY3QgCj4+PiBbLVdpbml0aWFsaXplci1vdmVy cmlkZXNdCj4+PiA+PiA+wqDCoMKgwqDCoMKgwqDCoMKgwqDCoCBbRVNSX0VMeF9FQ19GUF9BU0lN RF3CoMKgwqDCoMKgwqDCoMKgwqDCoCA9IGt2bV9oeXBfaGFuZGxlX2Zwc2ltZCwKPj4+ID4+ID7C oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgXn5+fn5+fn5+fn5+fn5+fn5+fn5+Cj4+ PiA+PiA+wqDCoMKgIGFyY2gvYXJtNjQva3ZtL2h5cC9udmhlL3N3aXRjaC5jOjE5NjoyODogbm90 ZTogcHJldmlvdXMgCj4+PiBpbml0aWFsaXphdGlvbiBpcyBoZXJlCj4+PiA+PiA+wqDCoMKgwqDC oMKgwqDCoMKgwqDCoCBbMCAuLi4gRVNSX0VMeF9FQ19NQVhdwqDCoMKgwqDCoMKgwqDCoMKgID0g TlVMTCwKPj4+ID4+ID7CoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDC oMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgXn5+fgo+Pj4g Pj4gPsKgwqDCoCBpbmNsdWRlL2xpbnV4L3N0ZGRlZi5oOjg6MTQ6IG5vdGU6IGV4cGFuZGVkIGZy b20gbWFjcm8gJ05VTEwnCj4+PiA+PiA+wqDCoMKgICNkZWZpbmUgTlVMTCAoKHZvaWQgKikwKQo+ Pj4gPj4gPsKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIF5+fn5+fn5+fn5+Cj4+PiA+ Pgo+Pj4gPj4gS2FsZXNoLCBwbGVhc2UgaWdub3JlIHRoaXMgbm9uc2Vuc2UuIFRoZXJlIG1heSBi ZSB0aGluZ3MgdG8gaW1wcm92ZSwKPj4+ID4+IGJ1dCB0aGlzIGlzICpOT1QqIG9uZSBvZiB0aGVt Lgo+Pj4gPj4KPj4+ID4+IFRoZXNlIHJlcG9ydHMgYXJlIHByZXR0eSB1c2VsZXNzLCBhbmQganVz dCBsZWFkIHBlb3BsZSB0byBpZ25vcmUgcmVhbAo+Pj4gPj4gYnVnIHJlcG9ydHMuCj4+PiA+Cj4+ PiA+IEhpIEthbGVzaCwgc29ycnkgdGhlcmUncmUgc29tZSBpcnJlbGV2YW50IGlzc3VlcyBtaXhl ZCBpbiB0aGUgcmVwb3J0LAo+Pj4gPiBraW5kbHkgaWdub3JlIHRoZW0uIEFuZCB0aGUgdmFsdWFi bGUgb25lcyBhcmUgdGhlIG5ldyBvbmVzIHRoYXQKPj4+ID4gcHJlZml4ZWQgYnkgPj4sIGFzIHRo ZSBiZWxvdyBvbmUgaW4gb3JpZ2luYWwgcmVwb3J0Lgo+Pj4gPgo+Pj4gPj4+IGFyY2gvYXJtNjQv a3ZtL2h5cC9udmhlL3N3aXRjaC5jOjM3MjoxNzogd2FybmluZzogbm8gcHJldmlvdXMKPj4+ID4+ PiBwcm90b3R5cGUgZm9yIGZ1bmN0aW9uICdoeXBfcGFuaWNfYmFkX3N0YWNrJyBbLVdtaXNzaW5n LXByb3RvdHlwZXNdCj4+PiA+wqDCoMKgIHZvaWQgX19ub3JldHVybiBoeXBfcGFuaWNfYmFkX3N0 YWNrKHZvaWQpCj4+PiA+wqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgXgo+ Pj4KPj4+IFRoaXMgaXMgb25seSBjYWxsZWQgZnJvbSBhc3NlbWJseSBjb2RlLCBzbyBhIHByb3Rv dHlwZSB3b3VsZG4ndCBicmluZwo+Pj4gbXVjaC4KPj4+Cj4+Cj4+IFNob3VsZCBwcm9iYWJseSBi ZSBtYXJrZWQgYXMgJ2FzbWxpbmthZ2UnIHRoZW4uIEkndmUgc3VnZ2VzdGVkIG1hbnkKPj4gdGlt ZXMgYWxyZWFkeSB0aGF0IHRoaXMgYm9ndXMgZGlhZ25vc3RpYyBzaG91bGQgZWl0aGVyIGJlIGRp c2FibGVkLCBvcgo+PiBkaXNyZWdhcmQgJ2FzbWxpbmthZ2UnIHN5bWJvbHMuCj4gCj4gWWVzLCBh c21saW5rYWdlIGlzIGRlZmluaXRlbHkgbWlzc2luZy4KPiAKPiBCdXQgaXQgaXMgcHJldHR5IG9i dmlvdXMgdGhhdCB0aGUgcm9ib3QgcGVvcGxlIGFyZW4ndCBpbnRlcmVzdGVkIGluCj4gZml4aW5n IHRoaXMgcGFydGljdWxhciBpc3N1ZSwgZ2l2ZW4gaG93IGxvbmcgd2UgaGF2ZSBiZWVuIHN1Z2dl c3RpbmcKPiB0aGlzLi4uCj4gCj4gIMKgwqDCoMKgwqDCoMKgIE0uCgpIaSBNYXJjLCBBcmQsCgpX ZSBoYXZlIGlnbm9yZWQgdGhlIHdhcm5pbmcgcmVsYXRlZCB0byBhc21saW5rYWdlIGFjY29yZGlu ZyB0byB0aGUgYmVsb3cgCmFkdmljZToKIApodHRwczovL2xvcmUua2VybmVsLm9yZy9sa21sL0NB TWoxa1hIclJZYWdTVm5pU2V0SGRHMTVya1FTK2ZtNHpWT3ROPVpkYTNXMFFhRW9KQUBtYWlsLmdt YWlsLmNvbS8KCmRvIHlvdSB3YW50IHRoZSBib3QgaWdub3JlIHN1Y2ggd2FybmluZyBpZiBhc21s aW5rYWdlIG5vdCBzcGVjaWZpZWQ/CgpCZXN0IFJlZ2FyZHMsClJvbmcgQ2hlbgoKX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGludXgtYXJtLWtlcm5lbCBt YWlsaW5nIGxpc3QKbGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9s aXN0cy5pbmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYXJtLWtlcm5lbAo=