From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 D17F61A072A; Wed, 8 Jan 2025 11:22:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736335376; cv=none; b=Yroo/ytoroRAruiFVznR6HnAJzfJDkjhLJj9b5Cgh58neDDJZgIi2+s+6XRzW3gkWdx5GuOsHfLg42niaVdzmdt0gcQ2DQ2quSQ1TXjlgLhCdfTksAnyn+BO3wLlMrRt+dsQnJlNRt6LYcMxooySdXVVSK1U232gdgzZ1ou9iZk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736335376; c=relaxed/simple; bh=q2HYqSrkEhzFCsWzL/6ZeJhSbwr1mbpb81gzBIiubMQ=; h=Date:Message-ID:From:To:Cc:Subject:In-Reply-To:References: MIME-Version:Content-Type; b=jvGO8WTH7hNOtzoPgjBbKTuYuvOByZwJAfE30G+jovirFDDbJ0/UB9Kk9PDCj5GQGLCxQcetkpIZZh/oulIGbgqzwoUzTBBe2oqla1Mjjb6A84kVBNlyZitysPt0cMw7++YVJeJ5gWZjg1kSMNOb9k9rW5LmMEgAf21b0GCHjfw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=E1j5mIjD; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="E1j5mIjD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4D73AC4CEDD; Wed, 8 Jan 2025 11:22:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1736335376; bh=q2HYqSrkEhzFCsWzL/6ZeJhSbwr1mbpb81gzBIiubMQ=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=E1j5mIjDN2AEZ1LWo6zhBd0Zr3bk+qK+/UKdaUMexMQxGpOpnRhgfHbFtzUZLoNfw JeNLBmFwtO6CadBVQb7xJ2atPFlsNJYp1bKIFkNsv+1x1fMEtRyh8qLpRP4CMORgMo /FbE/fj4P/UVB1Ld0SIJrKILtPJTbA5GORgDQFrzR3aO0EVpcvqmpnDr8g9jjPTTPd l8gZguiUwrO5N8znYW2DJfzwLXMyAaHB8nnqW8oDPn0SP1RJGC1NhcrqfPMKMLLaHK WQtQbk1YsVyUz40qrAkeF2iGGEfrPyr4qL781ZO8y23cSwFH5pCIlT5QEqHaebtK68 UTZyBdoH/iHKA== Received: from sofa.misterjones.org ([185.219.108.64] helo=goblin-girl.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1tVU9G-00A7Ox-Ab; Wed, 08 Jan 2025 11:22:54 +0000 Date: Wed, 08 Jan 2025 11:22:53 +0000 Message-ID: <86v7upwnw2.wl-maz@kernel.org> From: Marc Zyngier To: Yogesh Lal Cc: Thomas Gleixner , , , Subject: Re: [PATCH v2] irqchip: gic-v3: Handle failure case of CPU enters low power state In-Reply-To: <20241220093907.2747601-1-quic_ylal@quicinc.com> References: <20241220093907.2747601-1-quic_ylal@quicinc.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/29.4 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: quic_ylal@quicinc.com, tglx@linutronix.de, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false On Fri, 20 Dec 2024 09:39:07 +0000, Yogesh Lal wrote: > > Adding a new condition in gic_cpu_pm_notifier to address instances > where the CPU fails to enter low power mode (CPU_PM_ENTER_FAILED). > The CPU_PM framework signals CPU_PM_ENTER_FAILED upon such failures. > > When the CPU attempts to enter low power mode, it disables the > redistributor and Group 1 interrupts and reinitializes the system > registers upon wakeup. > > In case of failure while entering low power mode, it is necessary > to re-enable the redistributor and Group 1 interrupts to restore > normal operation. > > Signed-off-by: Yogesh Lal Acked-by: Marc Zyngier M. -- Without deviation from the norm, progress is not possible.