| Message ID | 1458830676-27075-14-git-send-email-shannon.zhao@linaro.org |
|---|---|
| State | New |
| Headers | show |
Hi Shannon, On 24/03/16 14:44, Shannon Zhao wrote: > Add a "uefi" node under /hypervisor node in FDT, then Linux kernel could > scan this to get the UEFI information. > > CC: Rob Herring <robh@kernel.org> > Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org> > Acked-by: Rob Herring <robh@kernel.org> > Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> > --- > Documentation/devicetree/bindings/arm/xen.txt | 33 +++++++++++++++++++++++++++ > 1 file changed, 33 insertions(+) > > diff --git a/Documentation/devicetree/bindings/arm/xen.txt b/Documentation/devicetree/bindings/arm/xen.txt > index 0f7b9c2..6f83f76 100644 > --- a/Documentation/devicetree/bindings/arm/xen.txt > +++ b/Documentation/devicetree/bindings/arm/xen.txt > @@ -15,6 +15,26 @@ the following properties: > - interrupts: the interrupt used by Xen to inject event notifications. > A GIC node is also required. You need to update the recent of the document based on the changes you made in the Xen one. See [1]. > +To support UEFI on Xen ARM virtual platforms, Xen populates the FDT "uefi" node > +under /hypervisor with following parameters: > + > +________________________________________________________________________________ > +Name | Size | Description > +================================================================================ > +xen,uefi-system-table | 64-bit | Guest physical address of the UEFI System > + | | Table. > +-------------------------------------------------------------------------------- > +xen,uefi-mmap-start | 64-bit | Guest physical address of the UEFI memory > + | | map. > +-------------------------------------------------------------------------------- > +xen,uefi-mmap-size | 32-bit | Size in bytes of the UEFI memory map > + | | pointed to in previous entry. > +-------------------------------------------------------------------------------- > +xen,uefi-mmap-desc-size | 32-bit | Size in bytes of each entry in the UEFI > + | | memory map. > +-------------------------------------------------------------------------------- > +xen,uefi-mmap-desc-ver | 32-bit | Version of the mmap descriptor format. > +-------------------------------------------------------------------------------- > > Example (assuming #address-cells = <2> and #size-cells = <2>): > > @@ -22,4 +42,17 @@ hypervisor { > compatible = "xen,xen-4.3", "xen,xen"; > reg = <0 0xb0000000 0 0x20000>; > interrupts = <1 15 0xf08>; > + uefi { > + xen,uefi-system-table = <0xXXXXXXXX>; > + xen,uefi-mmap-start = <0xXXXXXXXX>; > + xen,uefi-mmap-size = <0xXXXXXXXX>; > + xen,uefi-mmap-desc-size = <0xXXXXXXXX>; > + xen,uefi-mmap-desc-ver = <0xXXXXXXXX>; > + }; > }; > + > +The format and meaning of the "xen,uefi-*" parameters are similar to those in > +Documentation/arm/uefi.txt, which are provided by the regular UEFI stub. However > +they differ because they are provided by the Xen hypervisor, together with a set > +of UEFI runtime services implemented via hypercalls, see > +http://xenbits.xen.org/docs/unstable/hypercall/x86_64/include,public,platform.h.html. > Regards, [1] http://lists.xenproject.org/archives/html/xen-devel/2016-03/msg03413.html -- Julien Grall
diff --git a/Documentation/devicetree/bindings/arm/xen.txt b/Documentation/devicetree/bindings/arm/xen.txt index 0f7b9c2..6f83f76 100644 --- a/Documentation/devicetree/bindings/arm/xen.txt +++ b/Documentation/devicetree/bindings/arm/xen.txt @@ -15,6 +15,26 @@ the following properties: - interrupts: the interrupt used by Xen to inject event notifications. A GIC node is also required. +To support UEFI on Xen ARM virtual platforms, Xen populates the FDT "uefi" node +under /hypervisor with following parameters: + +________________________________________________________________________________ +Name | Size | Description +================================================================================ +xen,uefi-system-table | 64-bit | Guest physical address of the UEFI System + | | Table. +-------------------------------------------------------------------------------- +xen,uefi-mmap-start | 64-bit | Guest physical address of the UEFI memory + | | map. +-------------------------------------------------------------------------------- +xen,uefi-mmap-size | 32-bit | Size in bytes of the UEFI memory map + | | pointed to in previous entry. +-------------------------------------------------------------------------------- +xen,uefi-mmap-desc-size | 32-bit | Size in bytes of each entry in the UEFI + | | memory map. +-------------------------------------------------------------------------------- +xen,uefi-mmap-desc-ver | 32-bit | Version of the mmap descriptor format. +-------------------------------------------------------------------------------- Example (assuming #address-cells = <2> and #size-cells = <2>): @@ -22,4 +42,17 @@ hypervisor { compatible = "xen,xen-4.3", "xen,xen"; reg = <0 0xb0000000 0 0x20000>; interrupts = <1 15 0xf08>; + uefi { + xen,uefi-system-table = <0xXXXXXXXX>; + xen,uefi-mmap-start = <0xXXXXXXXX>; + xen,uefi-mmap-size = <0xXXXXXXXX>; + xen,uefi-mmap-desc-size = <0xXXXXXXXX>; + xen,uefi-mmap-desc-ver = <0xXXXXXXXX>; + }; }; + +The format and meaning of the "xen,uefi-*" parameters are similar to those in +Documentation/arm/uefi.txt, which are provided by the regular UEFI stub. However +they differ because they are provided by the Xen hypervisor, together with a set +of UEFI runtime services implemented via hypercalls, see +http://xenbits.xen.org/docs/unstable/hypercall/x86_64/include,public,platform.h.html.