From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rob Herring Subject: Re: [RFC PATCH 1/3] Documentation: dt: keystone: ti-sci: Add optional host-id parameter Date: Tue, 12 Jun 2018 15:39:22 -0600 Message-ID: <20180612213922.GA26791@rob-hp-laptop> References: <20180605062640.3356-1-nm@ti.com> <20180605062640.3356-2-nm@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20180605062640.3356-2-nm@ti.com> Sender: linux-kernel-owner@vger.kernel.org To: Nishanth Menon Cc: Santosh Shilimkar , Tero Kristo , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org List-Id: devicetree@vger.kernel.org On Tue, Jun 05, 2018 at 01:26:38AM -0500, Nishanth Menon wrote: > Texas Instrument's System Control Interface (TISCI) permits the > ability for Operating Systems to running in virtual machines to be ...for OSs running in virtual... > able to independently communicate with the firmware without the need > going through an hypervisor. > > The "host-id" in effect is the hardware representation of the > host (example: VMs locked to a core) as identified to the System > Controller. So the hypervisor will fill in host-id's for each VM instance? > > This is introduced as an optional parameter to maintain consistency > with legacy device tree blobs. > > We call this with a vendor prefix to prevent any possible confusion > with SCSI ID (m68k) kernel option. > > Signed-off-by: Nishanth Menon > --- > Documentation/devicetree/bindings/arm/keystone/ti,sci.txt | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/Documentation/devicetree/bindings/arm/keystone/ti,sci.txt b/Documentation/devicetree/bindings/arm/keystone/ti,sci.txt > index 31f5f9a104cc..b56a02c10ae6 100644 > --- a/Documentation/devicetree/bindings/arm/keystone/ti,sci.txt > +++ b/Documentation/devicetree/bindings/arm/keystone/ti,sci.txt > @@ -45,11 +45,15 @@ Optional Properties: > debug_messages - Map the Debug message region > - reg: register space corresponding to the debug_messages > - ti,system-reboot-controller: If system reboot can be triggered by SoC reboot > +- ti,host-id: Integer value corresponding to the host ID assigned by Firmware > + for identification of host processing entities such as virtual > + machines > > Example (K2G): > ------------- > pmmc: pmmc { > compatible = "ti,k2g-sci"; > + ti,host-id = <2>; > mbox-names = "rx", "tx"; > mboxes= <&msgmgr &msgmgr_proxy_pmmc_rx>, > <&msgmgr &msgmgr_proxy_pmmc_tx>; > -- > 2.15.1 >