From mboxrd@z Thu Jan 1 00:00:00 1970 From: kbusch@kernel.org (Keith Busch) Date: Mon, 13 May 2019 08:37:54 -0600 Subject: [PATCH] nvme/pci: Use host managed power state for suspend In-Reply-To: <955722d8fc16425dbba0698c4806f8fd@AUSX13MPC105.AMER.DELL.COM> References: <20190510212937.11661-1-keith.busch@intel.com> <0080aaff18e5445dabca509d4113eca8@AUSX13MPC105.AMER.DELL.COM> <955722d8fc16425dbba0698c4806f8fd@AUSX13MPC105.AMER.DELL.COM> Message-ID: <20190513143754.GE15318@localhost.localdomain> On Mon, May 13, 2019@02:24:41PM +0000, Mario.Limonciello@dell.com wrote: > This was not a disk with HMB, but with regard to the HMB I believe it needs to be > removed during s0ix so that there isn't any mistake that SSD thinks it can access HMB > memory in s0ix. Is that really the case, though? Where may I find that DMA is not allowed in this state? I just want an authoritative reference to attach to the behavior. From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keith Busch Subject: Re: [PATCH] nvme/pci: Use host managed power state for suspend Date: Mon, 13 May 2019 08:37:54 -0600 Message-ID: <20190513143754.GE15318@localhost.localdomain> References: <20190510212937.11661-1-keith.busch@intel.com> <0080aaff18e5445dabca509d4113eca8@AUSX13MPC105.AMER.DELL.COM> <955722d8fc16425dbba0698c4806f8fd@AUSX13MPC105.AMER.DELL.COM> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <955722d8fc16425dbba0698c4806f8fd@AUSX13MPC105.AMER.DELL.COM> Sender: linux-kernel-owner@vger.kernel.org To: Mario.Limonciello@dell.com Cc: keith.busch@intel.com, hch@lst.de, sagi@grimberg.me, linux-nvme@lists.infradead.org, rafael@kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, kai.heng.feng@canonical.com List-Id: linux-pm@vger.kernel.org On Mon, May 13, 2019 at 02:24:41PM +0000, Mario.Limonciello@dell.com wrote: > This was not a disk with HMB, but with regard to the HMB I believe it needs to be > removed during s0ix so that there isn't any mistake that SSD thinks it can access HMB > memory in s0ix. Is that really the case, though? Where may I find that DMA is not allowed in this state? I just want an authoritative reference to attach to the behavior.