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Thu, 12 Aug 2021 12:57:53 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mEAHN-00A5wv-Aw for linux-arm-kernel@lists.infradead.org; Thu, 12 Aug 2021 12:57:50 +0000 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 07C5160F35; Thu, 12 Aug 2021 12:57:49 +0000 (UTC) Received: from sofa.misterjones.org ([185.219.108.64] helo=why.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1mEAHK-004YSt-Vi; Thu, 12 Aug 2021 13:57:47 +0100 Date: Thu, 12 Aug 2021 13:57:46 +0100 Message-ID: <8735reakhh.wl-maz@kernel.org> From: Marc Zyngier To: =?UTF-8?B?UmFmYcWCIE1pxYJlY2tp?= Cc: David Brazdil , Catalin Marinas , Will Deacon , linux-arm-kernel , Mark Rutland , Ard Biesheuvel , Marco Elver , BCM Kernel Feedback , Florian Fainelli Subject: Re: arm64 regression in kernel 5.12 related to the (n)VHE In-Reply-To: References: <53f3a2d2-22f8-edee-2507-d41a4090dad7@gmail.com> <87r1f09md8.wl-maz@kernel.org> <87czqj9mvo.wl-maz@kernel.org> <878s179jsq.wl-maz@kernel.org> <764732f3-6cd7-bd18-4c83-1b851c29b2a4@gmail.com> <875ywb9dj7.wl-maz@kernel.org> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/27.1 (x86_64-pc-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: zajec5@gmail.com, dbrazdil@google.com, catalin.marinas@arm.com, will@kernel.org, linux-arm-kernel@lists.infradead.org, mark.rutland@arm.com, ardb@kernel.org, elver@google.com, bcm-kernel-feedback-list@broadcom.com, f.fainelli@gmail.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210812_055749_449279_E85DBBFA X-CRM114-Status: GOOD ( 32.76 ) 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 T24gVGh1LCAxMiBBdWcgMjAyMSAxMzoyOTo1NiArMDEwMCwKUmFmYcWCIE1pxYJlY2tpIDx6YWpl YzVAZ21haWwuY29tPiB3cm90ZToKPiAKPiBPbiAxMi4wOC4yMDIxIDEyOjEzLCBNYXJjIFp5bmdp ZXIgd3JvdGU6Cj4gPiBPbiBUaHUsIDEyIEF1ZyAyMDIxIDA5OjI0OjE0ICswMTAwLAo+ID4gUmFm YcWCIE1pxYJlY2tpIDx6YWplYzVAZ21haWwuY29tPiB3cm90ZToKClsuLi5dCgo+ID4+IEknbSBq dXN0IGFuIGVuZC11c2VyIHdpdGggbm8gYWNjZXNzIHRvIENGRSBzb3VyY2VzIGFuZCB3aXRob3V0 IGFueQo+ID4+IGJ1c2luZXNzIGNvbnRhY3QgYXMgQnJvYWRjb20gOigKPiA+IAo+ID4gSSBmZWFy ZWQgdGhhdCB3b3VsZCBiZSB0aGUgY2FzZS4gRmxvcmlhbidzIHJlcGx5IHNlZW1zIHRvIGluZGlj YXRlCj4gPiB0aGF0IHRoZSAidXBzdHJlYW0iIGZpcm13YXJlIGltcGxlbWVudGF0aW9uIGlzIGNv cnJlY3QsIHNvIHRoZSBPRU0KPiA+IG11c3QgaGF2ZSBmdW1ibGVkIGl0IHNvbWVob3cuLi4KPiAK PiBQbGVhc2Ugbm90ZSB0aGF0IEJyb2FkY29tIGhhcyBtYW55IGJ1c2luZXNzIHVuaXRzLCBtYW55 IHRlYW1zIGFuZCBmcm9tCj4gbXkgdW5kZXJzdGFuZGluZyB0aGV5IG9mdGVuIGRvbid0IGNvb3Bl cmF0ZSBwcm9wZXJseS4KCkkgYmV0IHNvbWUgdGVhbSBzYW1wbGVkIGFuIGVhcmx5IHZlcnNpb24g b2YgdGhlIGZpcm13YXJlIHRoYXQgaW5jbHVkZWQKdGhlIGJ1ZyBhbmQgbmV2ZXIgbG9va2VkIGJh Y2suIFlvdSBjYW4gYWxzbyB0ZWxsIHRoZSBsZXZlbCBvZiBxdWFsaXR5CmJ5IHRoZSBmYWN0IHRo YXQgaXQgdXNlcyBzcGluLXRhYmxlcyB0byBib290LCB0aGF0IHRoZSBpbnRlcnJ1cHQKY29udHJv bGxlciBub2RlIGlzIGluY29tcGxldGUuLi4KCj4gSXQncyBsaWtlbHkgdGhhdCBCQ000OTA4IEJV IHNjcmV3ZWQgc29tZXRoaW5nIHVwLiBPciBtYXliZSBpdCdzIGEgbWF0dGVyCj4gb2YgQ0ZFIHZz LiBVLUJvb3Q/CgpJdCBpcyBhIG1hdHRlciBvZiB3aGF0ZXZlciBpcyBydW5uaW5nIGF0IEVMMyBh bmQgZG9pbmcgdGhlIGJhc2ljIHNldHVwCm9mIHRoZSBDUFVzLgo+IAo+IEZsb3JpYW46IGRvZXMg eW91ciB0ZWFtIChzZXQtdG9wIGJveCBhbmQgY2FibGUgbW9kZW0gZGV2aWNlcykgdXNlIENGRSBv cgo+IFUtQm9vdCB3aXRoIGtlcm5lbHMgNS4xMis/Cj4gCj4gSXQncyB2ZXJ5IHVubGlrZWx5IGl0 J3MgYSBzaW5nbGUgT0VNIHRoYXQgYnJva2UgQ0ZFIHdpdGggY3VzdG9tCj4gbW9kaWZpY2F0aW9u cy4gVGhpcyBwcm9ibGVtIGFmZmVjdHMgYWxsIDMgZGV2aWNlcyBJIG93bjoKPiAxLiBOZXRnZWFy IFI4MDAwUAo+IDIuIFRQLUxpbmsgQXJjaGVyIEMyMzAwIFYxCj4gMy4gQXN1cyBHVC1BQzUzMDAK ClRoZXkgcHJvYmFibHkgYWxsIHVzZSB0aGUgc2FtZSBwcmUtY2FzdCBkZXNpZ24gd2l0aCBzb21l IHNvcnQgb2YKdmFsdWUtYWRkIG9uIHRvcC4KClsuLi5dCgo+ID4gVGhhdCdzIGV4cGVjdGVkLiBD YW4geW91IHBsZWFzZSBjaGVjayB0aGUgcGF0Y2ggYmVsb3c/IEl0IHNob3VsZAo+ID4gcmVzdWx0 IGluIGEgYm9vdGluZyBrZXJuZWwgd2hpY2ggYWN0dWFsbHkgc3Vydml2ZXMgaGF2aW5nIEtWTSBj b21waWxlZAo+ID4gaW4uIEl0IHNob3VsZCBldmVuIGRpc3BsYXkgYSB3YXJuaW5nIHRlbGxpbmcg eW91IHRoYXQgeW91ciBzZXR1cCBpcwo+ID4gY29tcGxldGVseSBidWdnZXJlZC4KPiA+IAo+ID4g VGhhdCdzIG9idmlvdXNseSBub3QgdGhlIGZpbmFsIHZlcnNpb24sIGJ1dCBwcm9iYWJseSBhIGdv b2QgZW5vdWdoCj4gPiBhcHByb3hpbWF0aW9uLgo+IAo+IEl0IHNlZW1zIHRvIHdvcmshIEtlcm5l bCBoYXMgYm9vdGVkIGFuZCBJIHNhdzoKPiBDUFU6IENQVXMgc3RhcnRlZCBpbiBpbmNvbnNpc3Rl bnQgbW9kZXMKPiBXQVJOSU5HOiBDUFU6IDAgUElEOiAxIGF0IGFyY2gvYXJtNjQva2VybmVsL3Nt cC5jOjQyNiBzbXBfY3B1c19kb25lKzB4OGMvMHhjOAo+ICguLi4pCj4ga3ZtIFsxXTogSFlQIG1v ZGUgbm90IGF2YWlsYWJsZQoKUmlnaHQuIFNvIHRoZXJlIGlzIHNvbWUgaG9wZS4gTWF5YmUuIEkn bSBub3Qgc3VyZSBJIHdhbnQgdG8gbWFpbnRhaW4KdGhpcyBjcmFwIHRob3VnaC4KClsuLi5dCgo+ IG5hbmQ6IGRldmljZSBmb3VuZCwgTWFudWZhY3R1cmVyIElEOiAweGM4LCBDaGlwIElEOiAweGRh Cj4gbmFuZDogRVNNVCBOQU5EIDI1Nk1pQiAzLDNWIDgtYml0Cj4gbmFuZDogMjU2IE1pQiwgU0xD LCBlcmFzZSBzaXplOiAxMjggS2lCLCBwYWdlIHNpemU6IDIwNDgsIE9PQiBzaXplOiA2NAo+IGJj bTYzMTM4X25hbmQgZmY4MDE4MDAubmFuZDogZGV0ZWN0ZWQgMjU2TWlCIHRvdGFsLCAxMjhLaUIg YmxvY2tzLCAyS2lCIHBhZ2VzLCAxNkIgT09CLCA4LWJpdCwgQkNILTQKPiBCYWQgYmxvY2sgdGFi bGUgZm91bmQgYXQgcGFnZSAxMzEwMDgsIHZlcnNpb24gMHgwMQo+IEJhZCBibG9jayB0YWJsZSBm b3VuZCBhdCBwYWdlIDEzMDk0NCwgdmVyc2lvbiAweDAxCj4gMyBmaXhlZC1wYXJ0aXRpb25zIHBh cnRpdGlvbnMgZm91bmQgb24gTVREIGRldmljZSBicmNtbmFuZC4wCj4gQ3JlYXRpbmcgMyBNVEQg cGFydGl0aW9ucyBvbiAiYnJjbW5hbmQuMCI6Cj4gMHgwMDAwMDAwMDAwMDAtMHgwMDAwMDAxMDAw MDAgOiAiY2Zlcm9tIgo+IDB4MDAwMDAwMTAwMDAwLTB4MDAwMDA1ODAwMDAwIDogImZpcm13YXJl Igo+IDB4MDAwMDA1ODAwMDAwLTB4MDAwMDBhZjAwMDAwIDogImJhY2t1cCIKClNvIGhlcmUncyB5 b3VyIGNoYW5jZSEgWW91IGhhdmUgdGhlIGZpcm13YXJlIGltYWdlIGhlcmUgKEkgZ3Vlc3MKImNm ZXJvbSIgaXMgdGhlIG9uZSkuIEl0J2QgYmUgaW50ZXJlc3RpbmcgdG8gZGlzYXNzZW1ibGUgaXQs IGZpbmQgb3V0CndoZXJlIFNDUl9FTDMgaXMgc2V0LCBwYXRjaCBpdCBhbmQgbmV2ZXIgbG9vayBi YWNrLgoKT25seSBraWRkaW5nLgoKCU0uCgotLSAKV2l0aG91dCBkZXZpYXRpb24gZnJvbSB0aGUg bm9ybSwgcHJvZ3Jlc3MgaXMgbm90IHBvc3NpYmxlLgoKX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX18KbGludXgtYXJtLWtlcm5lbCBtYWlsaW5nIGxpc3QKbGlu dXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRlYWQu b3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYXJtLWtlcm5lbAo=