From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=217.140.110.172 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793990164; b=WIJW2KnSPTzm4zR1Zow05ADFyG1B7fEu8gt4E30I2rACOX7yqAwfaORH8S5dS7iy+HZf EjKw3dlYbd8UkGK2GWaOPBai7A5CNt+Ebq1J5Th2cOTCsTqix7fk8Sy6yiUI8avl0EJJy fN4TIh4bECqvyge2R9PRGDig+b2eMh9uJzIrtY9ojf/rHu1GzIjQ16DRdvRO9JCDAj4cm hJyECIgIhVN95awy9pKXSNv6uxLupMZOWp0YAHfYCZ5Rx51mPTo0bzUoAJax16nANrZ8a dLPAYTogXxGHpjL4XCMgBV49I86uUSpQDi/Qvx8wx6ZafbbOaPX30nIy35QiltrMyng== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793990164; h=DMARC-Filter:Received:Received:DKIM-Signature:Date:From:To:Cc: Subject:Message-ID:References:MIME-Version:Content-Type: Content-Disposition:In-Reply-To; bh=BrgRaYrX/RlgPy+GPq7MQFpr0fqcLrZ1d+Pm22+zM0Q=; b=n3YOC8hNbaqB+ulC6qZbxHYgTz/l4cOCX5hInHwLdzl2/tK2XlO/G+YoYAcy2gJyYIra /dyjHWXrGAmH6xH8qJc5FGHC8sgMrdY6RC0pNt8BFVbFCpmW4tjxBu6wm9IQmlPM/1vIT OeomD0yNaMhMiw09+EtdomFrh8Netk6r0eRkK8aQscrkBnnw24PJEusMebN6tqyZ07lOj zRnvdgH/1/hZdL1lgUA6WQc6fODbBPbDNGq5sHclB3E4clHdQWnWwEvjo5xKVFYM6Y00Y MCVFi7jomxJkS6ZbO/UzB9iAjvpcIfbHhp2iEy+6XRtDNkVgZPqlEpY92CLRzTRkjtQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=foss header.b=pos13iHp; arc=none smtp.remote-ip=217.140.110.172 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id E4ED9606A326; Fri, 6 Nov 2026 18:36:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org E4ED9606A326 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=foss header.b=pos13iHp Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 0C6B61650; Fri, 6 Nov 2026 10:36:00 -0800 (PST) Received: from arm.com (usa-sjc-mx-foss1.foss.arm.com [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 844AD3F673; Fri, 6 Nov 2026 10:36:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1793990163; bh=HS/iYnoDJ5zOgunxlgOe0o75m1+F+bzNPDULmR3Cnzo=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=pos13iHpBNz7BxF+JBDu4325Y4XtfDsV4xAB0j5rLon6hdQdlL4eu0bskzBnwJmDA 7JQmN+KOApzEGWM4baaaNxLbgYrQDVrlwnaz4dHp+jKbp+wrat/DdLnLF2b93kX15A ekZ0tvNkYEFiYyzuGM5WQHy68DprNLYmEKG3y/M4= Date: Fri, 6 Nov 2026 18:35:57 +0000 From: Catalin Marinas To: Ada Couprie Diaz Cc: Kiryl Shutsemau , Will Deacon , Mark Rutland , James Morse , Usama Arif , "Kiryl Shutsemau (Meta)" , Marc Zyngier , Doug Anderson , Breno Leitao , Jinjie Ruan , Vladimir Murzin , Linus Walleij , Peter Zijlstra , Thomas Huth , Dawei Li , mrigendrachaubey , kernel-team@meta.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH v2 1/2] arm64: sdei: Run the event handler on the kernel vectors Message-ID: References: <20261105120835.3321912-1-kirill@shutemov.name> <20261105120835.3321912-2-kirill@shutemov.name> <1bae50ad-a65e-4ccb-b247-8d9544e4c5ee@arm.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1bae50ad-a65e-4ccb-b247-8d9544e4c5ee@arm.com> Hi Ada, On Fri, Nov 06, 2026 at 04:14:56PM +0000, Ada Couprie Diaz wrote: > What are your thoughts ? > I understand that this is a completely different approach, but I feel it > would be more in line with what we already do for other entry paths. I agree moving this closer to the normal entry path makes sense and the PMR handling probably belongs there as well. However, I think there are implications for VHE (the handler runs at EL2 with VBAR_EL2) and for an event that interrupts a KVM world switch on the hyp vectors. I need to dig some more into this. In the meantime, I queued Kiryl's two patches, they're small enough for stable. Any entry.S rework can come on top of them for future kernels. Thanks. -- Catalin