lkml.org 
[lkml]   [2018]   [May]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCHv5 1/8] dt-bindings, firmware: add Intel Stratix10 service layer binding
    On Thu, May 24, 2018 at 11:33:13AM -0500, richard.gong@linux.intel.com wrote:
    > From: Richard Gong <richard.gong@intel.com>
    >
    > Add a device tree binding for the Intel Stratix10 service layer driver
    >
    > Signed-off-by: Richard Gong <richard.gong@intel.com>
    > Signed-off-by: Alan Tull <atull@kernel.org>
    > Reviewed-by: Rob Herring <robh@kernel.org>
    Acked-by: Moritz Fischer <mdf@kernel.org>
    > ---
    > v2: Change to put service layer driver node under the firmware node
    > Change compatible to "intel, stratix10-svc"
    > v3: No change
    > v4: Add Rob's Reviewed-by
    > v5: No change
    > ---
    > .../bindings/firmware/intel,stratix10-svc.txt | 57 ++++++++++++++++++++++
    > 1 file changed, 57 insertions(+)
    > create mode 100644 Documentation/devicetree/bindings/firmware/intel,stratix10-svc.txt
    >
    > diff --git a/Documentation/devicetree/bindings/firmware/intel,stratix10-svc.txt b/Documentation/devicetree/bindings/firmware/intel,stratix10-svc.txt
    > new file mode 100644
    > index 0000000..1fa6606
    > --- /dev/null
    > +++ b/Documentation/devicetree/bindings/firmware/intel,stratix10-svc.txt
    > @@ -0,0 +1,57 @@
    > +Intel Service Layer Driver for Stratix10 SoC
    > +============================================
    > +Intel Stratix10 SoC is composed of a 64 bit quad-core ARM Cortex A53 hard
    > +processor system (HPS) and Secure Device Manager (SDM). When the FPGA is
    > +configured from HPS, there needs to be a way for HPS to notify SDM the
    > +location and size of the configuration data. Then SDM will get the
    > +configuration data from that location and perform the FPGA configuration.
    > +
    > +To meet the whole system security needs and support virtual machine requesting
    > +communication with SDM, only the secure world of software (EL3, Exception
    > +Layer 3) can interface with SDM. All software entities running on other
    > +exception layers must channel through the EL3 software whenever it needs
    > +service from SDM.
    > +
    > +Intel Stratix10 service layer driver, running at privileged exception level
    > +(EL1, Exception Layer 1), interfaces with the service providers and provides
    > +the services for FPGA configuration, QSPI, Crypto and warm reset. Service layer
    > +driver also manages secure monitor call (SMC) to communicate with secure monitor
    > +code running in EL3.
    > +
    > +Required properties:
    > +-------------------
    > +The svc node has the following mandatory properties, must be located under
    > +the firmware node.
    > +
    > +- compatible: "intel,stratix10-svc"
    > +- method: smc or hvc
    > + smc - Secure Monitor Call
    > + hvc - Hypervisor Call
    > +- memory-region:
    > + phandle to the reserved memory node. See
    > + Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
    > + for details
    > +
    > +Example:
    > +-------
    > +
    > + reserved-memory {
    > + #address-cells = <2>;
    > + #size-cells = <2>;
    > + ranges;
    > +
    > + service_reserved: svcbuffer@0 {
    > + compatible = "shared-dma-pool";
    > + reg = <0x0 0x0 0x0 0x1000000>;
    > + alignment = <0x1000>;
    > + no-map;
    > + };
    > + };
    > +
    > + firmware {
    > + svc {
    > + compatible = "intel,stratix10-svc";
    > + method = "smc";
    > + memory-region = <&service_reserved>;
    > + };
    > + };
    > --
    > 2.7.4
    >
    > --
    > To unsubscribe from this list: send the line "unsubscribe linux-fpga" in
    > the body of a message to majordomo@vger.kernel.org
    > More majordomo info at http://vger.kernel.org/majordomo-info.html

    \
     
     \ /
      Last update: 2018-05-24 19:04    [W:2.574 / U:0.020 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site