| Message ID | 1471343113-10652-14-git-send-email-zhaoshenglong@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Shannon, On 16/08/2016 06:25, Shannon Zhao wrote: > From: Shannon Zhao <shannon.zhao@linaro.org> > > Add the ARM Multiboot module for ACPI, so UEFI or DomU can get the base > address of ACPI tables from it. > > Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org> Acked-by: Julien Grall <julien.grall@arm.com> > --- > docs/misc/arm/device-tree/acpi.txt | 24 ++++++++++++++++++++++++ > tools/libxl/libxl_arm.c | 24 ++++++++++++++++++++++++ > 2 files changed, 48 insertions(+) > create mode 100644 docs/misc/arm/device-tree/acpi.txt > > diff --git a/docs/misc/arm/device-tree/acpi.txt b/docs/misc/arm/device-tree/acpi.txt > new file mode 100644 > index 0000000..3e70157 > --- /dev/null > +++ b/docs/misc/arm/device-tree/acpi.txt > @@ -0,0 +1,24 @@ > +DomU ACPI module > +================================ > + > +Xen toolstack passes the domU ACPI tables via a reference in the /chosen node of > +the device tree. > + > +Each node contains the following properties: > + > +- compatible > + > + "xen,guest-acpi", "multiboot,module" > + > +- reg > + > + Specifies the physical address and the length of the module. > + RSDP table is always located at the beginning of this region. > + > +Examples > +======== > + > + module@0x20000000 { > + compatible = "xen,guest-acpi", "multiboot,module"; > + reg = <0x20000000 0x1234>; > + }; > diff --git a/tools/libxl/libxl_arm.c b/tools/libxl/libxl_arm.c > index b95fdf5..11a6f6e 100644 > --- a/tools/libxl/libxl_arm.c > +++ b/tools/libxl/libxl_arm.c > @@ -285,6 +285,25 @@ static int make_chosen_node(libxl__gc *gc, void *fdt, bool ramdisk, > if (res) return res; > } > > + if (libxl_defbool_val(info->acpi)) { > + const uint64_t acpi_base = GUEST_ACPI_BASE; > + const char *name = GCSPRINTF("module@%"PRIx64, acpi_base); > + > + res = fdt_begin_node(fdt, name); > + if (res) return res; > + > + res = fdt_property_compat(gc, fdt, 2, "xen,guest-acpi", > + "multiboot,module"); > + if (res) return res; > + > + res = fdt_property_regs(gc, fdt, ROOT_ADDRESS_CELLS, ROOT_SIZE_CELLS, > + 1, 0, 0); > + if (res) return res; > + > + res = fdt_end_node(fdt); > + if (res) return res; > + } > + > res = fdt_end_node(fdt); > if (res) return res; > > @@ -974,6 +993,11 @@ int libxl__arch_domain_finalise_hw_description(libxl__gc *gc, > finalise_one_node(gc, fdt, "/memory", bankbase[i], size); > } > > + if (dom->acpi_modules[0].data) { > + finalise_one_node(gc, fdt, "/chosen/module", GUEST_ACPI_BASE, > + dom->acpi_modules[0].length); > + } > + > debug_dump_fdt(gc, fdt); > > return 0; > Regards,
diff --git a/docs/misc/arm/device-tree/acpi.txt b/docs/misc/arm/device-tree/acpi.txt new file mode 100644 index 0000000..3e70157 --- /dev/null +++ b/docs/misc/arm/device-tree/acpi.txt @@ -0,0 +1,24 @@ +DomU ACPI module +================================ + +Xen toolstack passes the domU ACPI tables via a reference in the /chosen node of +the device tree. + +Each node contains the following properties: + +- compatible + + "xen,guest-acpi", "multiboot,module" + +- reg + + Specifies the physical address and the length of the module. + RSDP table is always located at the beginning of this region. + +Examples +======== + + module@0x20000000 { + compatible = "xen,guest-acpi", "multiboot,module"; + reg = <0x20000000 0x1234>; + }; diff --git a/tools/libxl/libxl_arm.c b/tools/libxl/libxl_arm.c index b95fdf5..11a6f6e 100644 --- a/tools/libxl/libxl_arm.c +++ b/tools/libxl/libxl_arm.c @@ -285,6 +285,25 @@ static int make_chosen_node(libxl__gc *gc, void *fdt, bool ramdisk, if (res) return res; } + if (libxl_defbool_val(info->acpi)) { + const uint64_t acpi_base = GUEST_ACPI_BASE; + const char *name = GCSPRINTF("module@%"PRIx64, acpi_base); + + res = fdt_begin_node(fdt, name); + if (res) return res; + + res = fdt_property_compat(gc, fdt, 2, "xen,guest-acpi", + "multiboot,module"); + if (res) return res; + + res = fdt_property_regs(gc, fdt, ROOT_ADDRESS_CELLS, ROOT_SIZE_CELLS, + 1, 0, 0); + if (res) return res; + + res = fdt_end_node(fdt); + if (res) return res; + } + res = fdt_end_node(fdt); if (res) return res; @@ -974,6 +993,11 @@ int libxl__arch_domain_finalise_hw_description(libxl__gc *gc, finalise_one_node(gc, fdt, "/memory", bankbase[i], size); } + if (dom->acpi_modules[0].data) { + finalise_one_node(gc, fdt, "/chosen/module", GUEST_ACPI_BASE, + dom->acpi_modules[0].length); + } + debug_dump_fdt(gc, fdt); return 0;