From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 60210606A329 for ; Fri, 6 Nov 2026 18:36:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=f7MktCvE; dkim=pass (1024-bit key, unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=foss header.b=pos13iHp 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:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Unsubscribe-Post:List-Owner; bh=BrgRaYrX/RlgPy+GPq7MQFpr0fqcLrZ1d+Pm22+zM0Q=; b=f7MktCvEXLjaglkU+5H7WhLg5A o+apqv8+sXjLjwy4DGwGtVZnX7UjKBPo0Q3qnPtiZLjNskqJ7g8k//xiQKZxt9eXc0bMY1eJ0WXi0 NJj9pQQ8sLwR7TSIgHnD4qgoQwhp56PeXQ1DkcID2LGbU9ECVdlENWweGSLRkP1dzAoN+ldwUqB5a 07i4dL5rNIF3TYfjKKHJnuRh/zivvOhI1vtTo7khlwQn5E9/v9BY++mALKcq5y2KBMIhMgARtJZQ4 MgHwpp8nPmnc5fT6jplVFTITU8Ra43ZuC/U+iN3ieKY4hptQ4pizIU48siH55Xf8doOQVaqo5zkt2 dhUXCw6Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xPOnH-0000000DPQN-1qYz; Fri, 06 Nov 2026 18:36:07 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xPOnF-0000000DPPY-0Iml for linux-arm-kernel@lists.infradead.org; Fri, 06 Nov 2026 18:36:06 +0000 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-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1bae50ad-a65e-4ccb-b247-8d9544e4c5ee@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261106_103605_336243_5CF6824C X-CRM114-Status: GOOD ( 12.77 ) X-Spam-Score: -4.4 (----) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-5.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 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