From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from stravinsky.debian.org (stravinsky.debian.org [82.195.75.108]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5CEEF3E6DC1; Tue, 14 Apr 2026 13:14:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=82.195.75.108 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776172482; cv=none; b=bE5OHTvaL/GSB45uKe/zvjE0gtPgiIAUX4zrnuI+pILSiNyJJJsJpf6dJSifjbYs4OE5EsVeO5/9qA75G8oAvvj5MXg8I69wBfBvi6iEwrsdr+JwY+6voQGbEZg9nKgw2gapOZg7SZd8f0IfDk3eA6gdWV6CcxtWgKlM0PfWmSE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776172482; c=relaxed/simple; bh=p6w550N0MxEwxNAHSInqETjhVWVfzaLbGQYn5bMQkuk=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=tHqP7FzlXYWBzPX6nfwI+nhXcoHEt95+RlfDzLWl7TOliDrsW2poO3Qmjhh8azUkgeE9bkL2XgFSxJptjW1SJPu1XsGPT30jW8YiDVBFFJ6oNeBh0w2h0TD+Y6NU1YlSlO+sBUoTv1HJlZYK5QZZA/rSU618FBE7XxS38CTT/S4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=debian.org; spf=none smtp.mailfrom=debian.org; dkim=pass (2048-bit key) header.d=debian.org header.i=@debian.org header.b=XlTlVTrF; arc=none smtp.client-ip=82.195.75.108 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=debian.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=debian.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=debian.org header.i=@debian.org header.b="XlTlVTrF" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=debian.org; s=smtpauto.stravinsky; h=X-Debian-User:In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=p6w550N0MxEwxNAHSInqETjhVWVfzaLbGQYn5bMQkuk=; b=XlTlVTrF7k4kweRqsnLhib6u2s JBVZbhwkXgqWFEOAq1frC3U41CvvnE4H7d5DcfmfLjYN3/IjfFYQCWSnIXeNP322WjdezqWyz7JH8 4dw41S+JTbqQrEDCQIZy1J7L7MaJenecODg6bLCc6UPpAp60Tkdimy5zFCB3Mw4VVXbvkW3uErNt2 otJo5JbZIeOH4QLsrNHhI29zee0WDcpO8TBVsm69UOYvmuPE8VtS5CI6favDXclujdaLLZrGEmwvJ 10fSHky5bxCsBXlFdslmXX+LID5KESeqvgYGCfxv2oiDqvXkZ5nmRNByU9jGspmYIdaup0sABsG3S v6S+BV2Q==; Received: from authenticated user by stravinsky.debian.org with esmtpsa (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.96) (envelope-from ) id 1wCday-00D5gf-1t; Tue, 14 Apr 2026 13:14:24 +0000 Date: Tue, 14 Apr 2026 06:14:19 -0700 From: Breno Leitao To: Sudeep Holla Cc: "lihuisong (C)" , "Rafael J. Wysocki" , Len Brown , lpieralisi@kernel.org, catalin.marinas@arm.com, will@kernel.org, "Rafael J. Wysocki" , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, pjaroszynski@nvidia.com, guohanjun@huawei.com, linux-arm-kernel@lists.infradead.org, rmikey@meta.com, kernel-team@meta.com Subject: Re: [PATCH RFC] ACPI: processor: idle: Do not propagate acpi_processor_ffh_lpi_probe() -ENODEV Message-ID: References: <20260413-ffh-v1-1-301704f69e2f@debian.org> <6694ca7c-13bf-4e7d-9621-bc992cbf96a7@huawei.com> <20260414-cute-shapeless-dolphin-c5b2fc@sudeepholla> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260414-cute-shapeless-dolphin-c5b2fc@sudeepholla> X-Debian-User: leitao Hello Sudeep, On Tue, Apr 14, 2026 at 01:25:53PM +0100, Sudeep Holla wrote: > So while I understand that the kernel did not report an error previously, that > does not mean the _LPI table is merely moot on this platform when it contains > only a WFI state. Can you clarify whether datacenter ARM systems are expected to expose deeper idle states beyond WFI in their _LPI tables? Backing up, I'm observing 72 pr_err() messages during boot on these hosts and trying to determine whether this indicates a firmware issue or if the kernel needs adjustment.