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[87.100.218.141]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-5532f61c919sm170125e87.4.2025.05.28.01.02.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 28 May 2025 01:02:45 -0700 (PDT) Date: Wed, 28 May 2025 11:02:44 +0300 From: Mikko Rapeli To: Tom Rini Cc: openembedded-core@lists.openembedded.org, Ilias Apalodimas Subject: Re: [PATCH v4 2/4] qemuarm64.conf: allow overriding QB_OPT_APPEND Message-ID: References: <20250526083548.413834-1-mikko.rapeli@linaro.org> <20250526083548.413834-2-mikko.rapeli@linaro.org> <20250528005247.GQ100073@bill-the-cat> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250528005247.GQ100073@bill-the-cat> List-Id: X-Webhook-Received: from li982-79.members.linode.com [45.33.32.79] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Wed, 28 May 2025 08:02:56 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/217338 Hi, On Tue, May 27, 2025 at 06:52:47PM -0600, Tom Rini wrote: > On Mon, May 26, 2025 at 11:35:45AM +0300, Mikko Rapeli wrote: > > > It enables qemu USB support which causes a reset > > loop currently with u-boot. > > > > Signed-off-by: Mikko Rapeli > > --- > > meta/conf/machine/qemuarm64.conf | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > This too feel like something that should be brought up on the U-Boot > side. We saw these issues in 2023 on qemu but thought they were specific to our Trusted Substrate config with tf-a, OP-TEE and u-boot. Some public info is in: https://linaro.atlassian.net/browse/LEDGE-435 I know USB support is really tricky with timings etc so I don't expect it to work well with bootloaders. Hence did not dig deeper. Now that I saw this reset loop with KVM I will note the details down with reproduction steps and send to u-boot list. But I think overriding QB_OPT_APPEND is handy, wether it has USB setup or something else. Other layers in yocto ecosystem use qemuarm64 as basis machine with testing and may want to change this. Cheers, -Mikko