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 C46BFCAC59A for ; Fri, 19 Sep 2025 07:27:58 +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: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-Owner; bh=iB8MStRFoe+6/9cvM+l8xto9p5ppYJhBuE+xfj8TFcQ=; b=diVd45OybW8L73js0mJYmJRpdf k8KBdXJBZY3iLTagxgOH26QaY31zQcXgeBo/xMlviSWdX8lNloIOKWQS326Mt4aVTi6slbYWjDSt7 Rk9j25/iwlvxlXwde9qwjZFTH3bNjuDUIKoEZGj00Eec7qP3KlWUv8bIdDkXXJIciSwMS/55t/If7 +1oKqd4xc10UYL79Ckgpef85mZSxyzdkq4PFpVrJlV8qh8thxyOiCZQiDcPj+x79RPgcatC0hNevY RG+FhYBmVCIXC4vaSmktsHOnkL20g/AMCk6G15xiP6d1hl49wchhH+SskiDamOkyQLePwnJQrI6FS JkDBDwjQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uzVX6-000000023Yq-2nji; Fri, 19 Sep 2025 07:27:52 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uzVX6-000000023Yh-0zcp for linux-arm-kernel@lists.infradead.org; Fri, 19 Sep 2025 07:27:52 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 550A360097; Fri, 19 Sep 2025 07:27:51 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8899FC4CEF0; Fri, 19 Sep 2025 07:27:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1758266871; bh=YvEGTDyCymkNc5PTq5aWhwM4Y9NEGr2bhCtP+oNI5l4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=PUdNYidGtZd+Gf2oDNJm1Y+DKX+QRHgaLr2xT+TpvLnqcFb8C5Msiwp4UNg9MzHFh K4+zVCjJkqdFob5skPlEqgTPb6AO3gn/1KGxDfGKRqc/Q0UMqNxiN1myAXJOwGxm8l zM3e+bkFgg2R3AsMcEJX3ioMXLJVht7i2TmqmXDArbFjTllRtRykA97T04bHk3qbqf ct7vMRPj+bpxOnP4u4culALYmvd2h4fxmqtEJyhdMYV2nD3BxQmNq6Xc2fj8WlGBsv TnUuvCjYdVIG+3XKRCpv4QID7T+b7aW9J4PkIvfyNofexW7lt45eSz/Nf8WvI/YPZZ XOixucKcpgIbw== Date: Fri, 19 Sep 2025 08:27:45 +0100 From: Will Deacon To: Dev Jain Cc: catalin.marinas@arm.com, anshuman.khandual@arm.com, quic_zhenhuah@quicinc.com, ryan.roberts@arm.com, kevin.brodsky@arm.com, yangyicong@hisilicon.com, joey.gouly@arm.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, david@redhat.com, mark.rutland@arm.com, urezki@gmail.com, jthoughton@google.com Subject: Re: [RESEND PATCH v5] arm64: Enable vmalloc-huge with ptdump Message-ID: References: <20250723161827.15802-1-dev.jain@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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 Dev, On Wed, Sep 17, 2025 at 04:43:00PM +0100, Will Deacon wrote: > On Tue, Sep 16, 2025 at 11:30:26AM +0100, Will Deacon wrote: > > I'm currently trying to put together a litmus test with James (cc'd) so > > maybe we can help you out with that part. > > Here's what we came up with. There's not a good way to express the IPI > from kick_all_cpus_sync() but it turns out that the ISB from the TLB > invalidation is sufficient anyway. Does it make sense to you? Any comments on the litmus test and/or my question about serialisation of the static key? I'll be moving the arm64 tree to "fixes only" soon as far as 6.18 is concerned. Will