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Mon, 17 May 2021 09:02:56 +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 7B9A961184; Mon, 17 May 2021 09:02:51 +0000 (UTC) Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] 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 1liZ9F-001lN6-9a; Mon, 17 May 2021 10:02:49 +0100 Date: Mon, 17 May 2021 10:02:40 +0100 Message-ID: <87im3hvikv.wl-maz@kernel.org> From: Marc Zyngier To: Andreas =?UTF-8?B?RsOkcmJlcg==?= Cc: linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Rob Herring Subject: Re: [PATCH 0/9] arm64: dts: rockchip: Initial Toybrick TB-RK1808M0 support In-Reply-To: <20210516230551.12469-1-afaerber@suse.de> References: <20210516230551.12469-1-afaerber@suse.de> 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: 62.31.163.78 X-SA-Exim-Rcpt-To: afaerber@suse.de, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, robh+dt@kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); 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Mon, 17 May 2021 10:02:49 +0100 Date: Mon, 17 May 2021 10:02:40 +0100 Message-ID: <87im3hvikv.wl-maz@kernel.org> From: Marc Zyngier To: Andreas =?UTF-8?B?RsOkcmJlcg==?= Cc: linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Rob Herring Subject: Re: [PATCH 0/9] arm64: dts: rockchip: Initial Toybrick TB-RK1808M0 support In-Reply-To: <20210516230551.12469-1-afaerber@suse.de> References: <20210516230551.12469-1-afaerber@suse.de> 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: 62.31.163.78 X-SA-Exim-Rcpt-To: afaerber@suse.de, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, robh+dt@kernel.org 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-20210517_020252_373918_9EE6BF68 X-CRM114-Status: GOOD ( 24.98 ) 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 T24gTW9uLCAxNyBNYXkgMjAyMSAwMDowNTo0MiArMDEwMCwKQW5kcmVhcyBGw6RyYmVyIDxhZmFl cmJlckBzdXNlLmRlPiB3cm90ZToKPiAKPiBIZWxsbyBIZWlrbyBldCBhbC4sCj4gCj4gSXQgc2Vl bXMgbGludXgtcm9ja2NoaXAgbGlzdCBvbmx5IHNhdyB0d28gUksxODA4IHBhdGNoZXMgZm9yIEFT b0MgaW4gMjAxOS4KPiBGb2xsb3dpbmcgdXAgb24gYSBTVVNFIEhhY2t3ZWVrIDIwIHByb2plY3Qg b2YgbWluZSwgaGVyZSdzIHNvbWUgcGF0Y2hlcyB0aGF0Cj4gYWxsb3cgbWUgdG8gc3RhcnQgYm9v dGluZyBpbnRvIHRoZSBUQi1SSzE4MDhNMCBtUENJZSBjYXJkJ3MgZU1NQy4KPiAKPiBUZXN0ZWQg dXNpbmcgaXRzIFVTQiBhZGFwdGVyLCB3aGljaCBhbGxvd3MgdG8gY29ubmVjdCBhIHNlcmlhbCBj YWJsZSBhbmQgYQo+IFVTQiBzdG9yYWdlIGRldmljZSB0aGF0IEkgbG9hZCBrZXJuZWwrZHRiIGZy b20uIEl0IGhhcyBhIHJlc2V0IGJ1dHRvbiwgYW5kCj4gQ3RybCtDIGFsbG93cyB0byBlbnRlciBh IFUtQm9vdCBwcm9tcHQgKHdpdGhvdXQgRUJCUi9VRUZJIHN1cHBvcnQgdGhvdWdoKS4KPiAKPiBQ YXRjaGVzIGFyZSBiYXNlZCBvbiB0aGUgc2hpcHBpbmcgdG95YnJpY2suZHRiIGZpbGUuCj4gaHR0 cDovL3Qucm9jay1jaGlwcy5jb20vZW4vd2lraS5waHA/bW9kPXZpZXcmaWQ9MTEwIGdpdmVzIGlu c3RydWN0aW9ucyBmb3IKPiBjb21waWxpbmcgc291cmNlcywgYnV0IG5vIHNvdXJjZSBkb3dubG9h ZCBvciBsaW5rIGlzIGFjdHVhbGx5IHByb3ZpZGVkLgo+IAo+IEkgZW5jb3VudGVyZWQgYSBoYW5n OiBlYXJseWNvbiByZXZlYWxlZCBpdCBiZWluZyByZWxhdGVkIHRvIEtWTSBhbmQKPiB2R0lDLiAg RGlzYWJsaW5nIEtWTSBpbiBLY29uZmlnIHdvcmtzIGFyb3VuZCBpdCwgYXMgZG9lcyByZW1vdmlu Zwo+IHRoZSB2R0lDIGlycSBpbiBEVC4gIEkndmUgYWxyZWFkeSB0cmllZCBsb3cgYW5kIGhpZ2gg Zm9yIHRoZSB2R0lDCj4gaW50ZXJydXB0LCBzbyBubyBjbHVlIHdoYXQgbWlnaHQgY2F1c2UgaXQu IE9uIGFuIG1QQ0llIGNhcmQgd2l0aCAxCj4gR2lCIG9mIFJBTSBJIGZpZ3VyZWQgS1ZNIGlzIG5v dCBnb2luZyB0byBiZSBhIG1ham9yIHVzZSBjYXNlLCBzbyBpZgo+IHdlIGZpbmQgbm8gb3RoZXIg c29sdXRpb24sIHdlIGNvdWxkIGp1c3QgZGVsZXRlIHRoZSBpbnRlcnJ1cHRzCj4gcHJvcGVydHkg aW4gaXRzIC5kdHMsIGFzIGRlbW9uc3RyYXRlZCBoZXJlLgoKSSB0aGluayB5b3UgZmlndXJlZCBp dCBvdXQgd3JvbmcsIGZvciBhIG51bWJlciBvZiByZWFzb25zOgoKLSBLVk0gaGFuZ2luZyBpcyB1 c3VhbGx5IGEgc2lnbiB0aGF0IHlvdSBoYXZlIGRlc2NyaWJlZCB0aGUgcGxhdGZvcm0KICB0aGUg d3Jvbmcgd2F5LiBFaXRoZXIgeW91IGFyZSBzdGVwcGluZyBvdmVyIHJlc2VydmVkIG1lbW9yeSBy ZWdpb25zLAogIG9yIHlvdSBoYXZlIGJhZGx5IGRlc2NyaWJlZCB0aGUgR0lDIGl0c2VsZi4KCi0g SXQgY291bGQgYWxzbyBiZSBhIGJ1ZyBpbiBLVk0sIHdoaWNoIHdpbGwgbmVlZCB0byBiZSBmaXhl ZC4gSWYKICB0aGF0J3MgYmVjYXVzZSB0aGUgSFcgaXMgYnJva2VuLCB3ZSBuZWVkIHRvIGJlIGFi bGUgdG8gZGV0ZWN0IGl0LgoKLSBZb3UgY2Fubm90IGJlIHByZXNjcmlwdGl2ZSBvZiB3aGF0IGEg dXNlciBpcyBnb2luZyB0byBydW4uIFBlb3BsZQogIGhhdmUgYmVlbiBydW5uaW5nIEtWTSBvbiBz eXN0ZW1zIHdpdGggbGVzcyBtZW1vcnkgdGhhbiB0aGF0LgoKU28gbm8sIHdlIGRvbid0IHBhcGVy IG92ZXIgdGhlc2UgaXNzdWVzLiBXZSB3b3JrIG91dCB3aGF0IGlzIGdvaW5nCndyb25nIGFuZCB3 ZSBmaXggaXQuCgpUaGFua3MsCgoJTS4KCi0tIApXaXRob3V0IGRldmlhdGlvbiBmcm9tIHRoZSBu b3JtLCBwcm9ncmVzcyBpcyBub3QgcG9zc2libGUuCgpfX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1hcm0ta2VybmVsIG1haWxpbmcgbGlzdApsaW51 eC1hcm0ta2VybmVsQGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5v cmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1hcm0ta2VybmVsCg== 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 X-Spam-Level: X-Spam-Status: No, score=-4.0 required=3.0 tests=BAYES_00,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A619CC433ED for ; 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Mon, 17 May 2021 10:02:49 +0100 Date: Mon, 17 May 2021 10:02:40 +0100 Message-ID: <87im3hvikv.wl-maz@kernel.org> From: Marc Zyngier To: Andreas =?UTF-8?B?RsOkcmJlcg==?= Cc: linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Rob Herring Subject: Re: [PATCH 0/9] arm64: dts: rockchip: Initial Toybrick TB-RK1808M0 support In-Reply-To: <20210516230551.12469-1-afaerber@suse.de> References: <20210516230551.12469-1-afaerber@suse.de> 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") Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: afaerber@suse.de, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, robh+dt@kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On Mon, 17 May 2021 00:05:42 +0100, Andreas Färber wrote: > > Hello Heiko et al., > > It seems linux-rockchip list only saw two RK1808 patches for ASoC in 2019. > Following up on a SUSE Hackweek 20 project of mine, here's some patches that > allow me to start booting into the TB-RK1808M0 mPCIe card's eMMC. > > Tested using its USB adapter, which allows to connect a serial cable and a > USB storage device that I load kernel+dtb from. It has a reset button, and > Ctrl+C allows to enter a U-Boot prompt (without EBBR/UEFI support though). > > Patches are based on the shipping toybrick.dtb file. > http://t.rock-chips.com/en/wiki.php?mod=view&id=110 gives instructions for > compiling sources, but no source download or link is actually provided. > > I encountered a hang: earlycon revealed it being related to KVM and > vGIC. Disabling KVM in Kconfig works around it, as does removing > the vGIC irq in DT. I've already tried low and high for the vGIC > interrupt, so no clue what might cause it. On an mPCIe card with 1 > GiB of RAM I figured KVM is not going to be a major use case, so if > we find no other solution, we could just delete the interrupts > property in its .dts, as demonstrated here. I think you figured it out wrong, for a number of reasons: - KVM hanging is usually a sign that you have described the platform the wrong way. Either you are stepping over reserved memory regions, or you have badly described the GIC itself. - It could also be a bug in KVM, which will need to be fixed. If that's because the HW is broken, we need to be able to detect it. - You cannot be prescriptive of what a user is going to run. People have been running KVM on systems with less memory than that. So no, we don't paper over these issues. We work out what is going wrong and we fix it. Thanks, M. -- Without deviation from the norm, progress is not possible.