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 DF019C55171 for ; Sun, 2 Aug 2026 12:12:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc: To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=sr4eyIZPLWanwYAJIo3G9W6r+iGCRZrMeJZoQ8okwIQ=; b=bsFBR4ZUD5neZmt8LKJYNoIPnX j1exQkTmkAXqYsyPiObbj5MjtR7y6PVduh6FnKOEPgNB+IpzH6azKgNSWoaPTGt0KxUnFBkhjFqre 2IT4ohEp0ZEr1YGag8BwjWlkclzySreCIfggSDYEu4HXqPbueZkIey8l10Wp/GQSD81HUJAYsB8pn 3VyG9VkzH2iPaVtdXmT5P1ar2mQ6PLvkJXgti+4sYpXcWlfCpDK20Ari1yQiw3b0zJV530fn9LO/3 tKhqXe9C06k55ZLeR1yck/T0HSPo0vEEOZKbedz1LVmSSVw88s7eWqepKNvs566AYSRcx8XS+t25u qSOewWbQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wqV3f-0000000FbZ1-3Aru; Sun, 02 Aug 2026 12:12:47 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wqV3e-0000000FbYW-3UF2 for linux-arm-kernel@lists.infradead.org; Sun, 02 Aug 2026 12:12:46 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 41A4743D58; Sun, 2 Aug 2026 12:12:46 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4EF3F1F000E9; Sun, 2 Aug 2026 12:12:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785672766; bh=sr4eyIZPLWanwYAJIo3G9W6r+iGCRZrMeJZoQ8okwIQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=CvjWMwJTCWWtrNiZeqtDB6hyap94T6/+ReUgqnvvgwJtIuXGlQ5jpzMp8q0HnxeFm Pq42CofwQNBGidGQqvsoHRkAC8IMertIRsIJq3xBjbjaJxOMEN3Oz+OhFcQr1X1Y20 ug1vUoji6tYjKAUhUcvbYZyAeY6mLaNRNYsePBJopCnCxbRwGku65Lzj/yy1PhrLJF rF1ugRPv8s9BiQcCCK5RlkLw0kfffWo/SexA6PSW7z11I5sVbr/ilo0ESHyQ7OTcM5 mRCVlwVwzwHAXhZ/2csyFi04GVnlYhTZJTvs/jzjzxTIQ/ICuTJQPgtE9VHPy7RqAx 11QyvDKp2GB8A== From: Will Deacon To: Catalin Marinas , Shuah Khan , Mark Brown Cc: kernel-team@android.com, Will Deacon , linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Mark Rutland Subject: Re: [PATCH] kselftest/arm64: Don't write to P0 in irritator on SME only systems Date: Sun, 2 Aug 2026 13:12:21 +0100 Message-ID: <178566447595.4144986.14825319968746082587.b4-ty@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260731-arm64-sve-test-sme-only-v1-1-eb559009dce8@kernel.org> References: <20260731-arm64-sve-test-sme-only-v1-1-eb559009dce8@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, 31 Jul 2026 21:50:52 +0100, Mark Brown wrote: > Commit 3e360ef0c0a1f ("kselftest/arm64: Corrupt P0 in the irritator when > testing SSVE") added corruption of P0 to the sve-test case in order to > ensure that the predicate registers were covered as part of the > corruption. On SME only systems this results in an illegal instruction > since signal handlers are run out of streaming mode and the predicate > registers do not exist out of streaming mode without SVE. Switch to > entering and exiting streaming mode in the irritator, this will reset > all relevant registers to 0 if they somehow weren't already by the > signal entry. > > [...] Applied to arm64 (for-next/selftests), thanks! [1/1] kselftest/arm64: Don't write to P0 in irritator on SME only systems https://git.kernel.org/arm64/c/2b989c411ab9 Cheers, -- Will https://fixes.arm64.dev https://next.arm64.dev https://will.arm64.dev