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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1F235C43217 for ; Tue, 15 Nov 2022 10:59:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237999AbiKOK7l (ORCPT ); Tue, 15 Nov 2022 05:59:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36798 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232976AbiKOK71 (ORCPT ); Tue, 15 Nov 2022 05:59:27 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EA3843894; Tue, 15 Nov 2022 02:58:17 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id A2ED1B818BA; Tue, 15 Nov 2022 10:58:16 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5EE09C433C1; Tue, 15 Nov 2022 10:58:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1668509895; bh=z6lhldcuZ/yZWZWYTha4sLMNHyDOxr1XBhr9uVX5n8I=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=C3LF/SOeXRSmvSzYI72M47TJMFnyabqa/F07WML9cBlIn+xpTJVpPUAw7FWNFyTTG penic426VNlUkeQ5wxZFYHzK/sniZWtEMgawOp0gvm1u/WAy2RFc8S0WI1bhI3OCZ8 4llWckY1miNY1vUv9QKzaHofglUIg/cZHcWX2HmDqkHFoelTaXr22RHuZs66o5egQz OtuA+wqUFH6T+Bs8U9ctZWwntOdkG/WBe7oJeVc6xrT0MEgrKu9pA7j0orKugJOE7u vQ/rNw7qCUriD7deBsVfLTwO7HG1zP28NayMwbna3ppqx69Kypf1pV4j5MAU/ibpcq F417lvmoEW+Lg== Date: Tue, 15 Nov 2022 10:58:00 +0000 From: Mark Brown To: Arnd Bergmann Cc: Naresh Kamboju , open list , linux-stable , lkft-triage@lists.linaro.org, Greg Kroah-Hartman , Catalin Marinas , Ard Biesheuvel Subject: Re: WARNING: CPU: 0 PID: 1111 at arch/arm64/kernel/fpsimd.c:464 fpsimd_save+0x170/0x1b0 Message-ID: References: <97c413be-1a24-4447-b7ea-fa81a3170765@app.fastmail.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="Q2Os0hM+U3KKHspW" Content-Disposition: inline In-Reply-To: <97c413be-1a24-4447-b7ea-fa81a3170765@app.fastmail.com> X-Cookie: Ego sum ens omnipotens. Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org --Q2Os0hM+U3KKHspW Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Tue, Nov 15, 2022 at 09:22:53AM +0100, Arnd Bergmann wrote: > Have you tried what happens if you run the same thing on an x86 > machine? I would expect them to behave the same way, but it's > possible something goes wrong with the guest CPU if this ends > up using some (but not all) of the logic from KVM that would > use '-cpu host' instead of '-cpu max'. Note that the Neoverse > CPU in the Altra machine does not support SVE. I'm finding it hard to think of a failure pattern that would make it through VL discovery then fail at runtime but also not obviously trigger any issues in syscall-abi... > Other things you could easily try would use the same command > line as above, with the possible combinations of '-cpu host' > (replacing -cpu max) and '-enable-kvm'. Do you always get > the same result? The machine parameter accel={tcg,kvm} is useful for forcing a specific backend - it's probably wise to force TCG if you might be running on a job on a native architecture. BTW there's some other funky stuff going on with that job, the syscall-abi test is stopped with a timeout after 45 seconds (as is sve-ptrace) which appears to be coming from a harness somewhere. The selection of FP tests run seems to miss fp-stress too. --Q2Os0hM+U3KKHspW Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmNzcLcACgkQJNaLcl1U h9DlGQf/d9Fj8SoOkkYluJqJi8BFS1IA4U8ObGdL1Ntw4YR2qlhSMkgKBMVVsLWp NxdrmmzfbyfO8qPsNP85lvZlAu9z7ddDlBorMzVlFAVwZOkydzT7JiYEy44y7o/0 F6qFLXXO5l4fYsmDBvmglXiPXitFuQTgzNDIyhx1ETJErBaBzQiRpI45sCqO2Zju lZnJgH86mqm0G+mVkTd1gsx2iX9QYxUYoilNWGozV44N1zoz/8KH+KtbvtE2U7Au DCgOuc9WF/zqaEJ8Xi4dkHSHGidHC4rbkjyh63ANWpKZPyXT4czxC+xsBe1GJdOv 7z7/zaxbY4FNze1s8LpBHMWLWE0rtg== =pVs/ -----END PGP SIGNATURE----- --Q2Os0hM+U3KKHspW--