This patch allocates Virtio MMIO params (IRQ and memory region) and pass them to the backend, also update Guest device-tree based on Virtio GPIO DT bindings [1].
[1] https://www.kernel.org/doc/Documentation/devicetree/bindings/gpio/gpio-virti...
Signed-off-by: Viresh Kumar viresh.kumar@linaro.org --- tools/libs/light/libxl_arm.c | 47 ++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+)
diff --git a/tools/libs/light/libxl_arm.c b/tools/libs/light/libxl_arm.c index 08a1499c9523..14b95087f027 100644 --- a/tools/libs/light/libxl_arm.c +++ b/tools/libs/light/libxl_arm.c @@ -121,6 +121,15 @@ int libxl__arch_domain_prepare_config(libxl__gc *gc, return rc; }
+ for (i = 0; i < d_config->num_gpios; i++) { + libxl_device_gpio *gpio = &d_config->gpios[i]; + + int rc = alloc_virtio_mmio_params(gc, &gpio->base, &gpio->irq, + &virtio_mmio_base, &virtio_mmio_irq); + if (rc) + return rc; + } + /* * Every virtio-mmio device uses one emulated SPI. If Virtio devices are * present, make sure that we allocate enough SPIs for them. @@ -974,6 +983,38 @@ static int make_virtio_mmio_node_i2c(libxl__gc *gc, void *fdt, uint64_t base, return fdt_end_node(fdt); }
+static int make_virtio_mmio_node_gpio(libxl__gc *gc, void *fdt, uint64_t base, + uint32_t irq) +{ + int res; + + res = make_virtio_mmio_node_common(gc, fdt, base, irq); + if (res) return res; + + res = fdt_begin_node(fdt, "gpio"); + if (res) return res; + + res = fdt_property_compat(gc, fdt, 1, "virtio,device29"); + if (res) return res; + + res = fdt_property(fdt, "gpio-controller", NULL, 0); + if (res) return res; + + res = fdt_property_cell(fdt, "#gpio-cells", 2); + if (res) return res; + + res = fdt_property(fdt, "interrupt-controller", NULL, 0); + if (res) return res; + + res = fdt_property_cell(fdt, "#interrupt-cells", 2); + if (res) return res; + + res = fdt_end_node(fdt); + if (res) return res; + + return fdt_end_node(fdt); +} + static const struct arch_info *get_arch_info(libxl__gc *gc, const struct xc_dom_image *dom) { @@ -1305,6 +1346,12 @@ static int libxl__prepare_dtb(libxl__gc *gc, libxl_domain_config *d_config, FDT( make_virtio_mmio_node_i2c(gc, fdt, i2c->base, i2c->irq) ); }
+ for (i = 0; i < d_config->num_gpios; i++) { + libxl_device_gpio *gpio = &d_config->gpios[i]; + + FDT( make_virtio_mmio_node_gpio(gc, fdt, gpio->base, gpio->irq) ); + } + if (pfdt) FDT( copy_partial_fdt(gc, fdt, pfdt) );