Re: [Qemu-devel] [PATCH V4 4/5] hw/arm/virt: Use the pvpanic device

[Philippe Mathieu-Daudé]

Hi,

On 25/10/18 21:23, Peng Hao wrote:
> add pvpanic device in aarch64 virt machine.
>
> Signed-off-by: Peng Hao <address@hidden>
> Signed-off-by: Philippe Mathieu-Daudé <address@hidden>
> ---
>   default-configs/aarch64-softmmu.mak |  1 +
>   hw/arm/virt.c                       | 21 +++++++++++++++++++++
>   include/hw/arm/virt.h               |  1 +
>   3 files changed, 23 insertions(+)
>
> diff --git a/default-configs/aarch64-softmmu.mak 
> b/default-configs/aarch64-softmmu.mak
> index 6f790f0..57c6ca5 100644
> --- a/default-configs/aarch64-softmmu.mak
> +++ b/default-configs/aarch64-softmmu.mak
> @@ -9,3 +9,4 @@ CONFIG_DPCD=y
>   CONFIG_XLNX_ZYNQMP=y
>   CONFIG_XLNX_ZYNQMP_ARM=y
>   CONFIG_ARM_SMMUV3=y
> +CONFIG_PVPANIC=y
> diff --git a/hw/arm/virt.c b/hw/arm/virt.c
> index 9f67782..ffe8d00 100644
> --- a/hw/arm/virt.c
> +++ b/hw/arm/virt.c
> @@ -59,6 +59,7 @@
>   #include "qapi/visitor.h"
>   #include "standard-headers/linux/input.h"
>   #include "hw/arm/smmuv3.h"
> +#include "hw/misc/pvpanic.h"
>   
>   #define DEFINE_VIRT_MACHINE_LATEST(major, minor, latest) \
>       static void virt_##major##_##minor##_class_init(ObjectClass *oc, \
> @@ -143,6 +144,7 @@ static const MemMapEntry a15memmap[] = {
>       [VIRT_GPIO] =               { 0x09030000, 0x00001000 },
>       [VIRT_SECURE_UART] =        { 0x09040000, 0x00001000 },
>       [VIRT_SMMU] =               { 0x09050000, 0x00020000 },
> +    [VIRT_PVPANIC_MMIO] =       { 0x09060000, 0x00000002 },
>       [VIRT_MMIO] =               { 0x0a000000, 0x00000200 },
>       /* ...repeating for a total of NUM_VIRTIO_TRANSPORTS, each of that size */
>       [VIRT_PLATFORM_BUS] =       { 0x0c000000, 0x02000000 },
> @@ -190,6 +192,23 @@ static bool cpu_type_valid(const char *cpu)
>       return false;
>   }
>   
> +static void create_pvpanic_device(const VirtMachineState *vms)
> +{
> +    char *nodename;
> +    hwaddr base = vms->memmap[VIRT_PVPANIC_MMIO].base;
> +    hwaddr size = vms->memmap[VIRT_PVPANIC_MMIO].size;
> +
> +    sysbus_create_simple(TYPE_PVPANIC_MMIO, base, NULL);
> +
> +    nodename = g_strdup_printf("/address@hidden" PRIx64, base);

Can you add a link in the cover linking to the kernel side series?

> +    qemu_fdt_add_subnode(vms->fdt, nodename);
> +    qemu_fdt_setprop_string(vms->fdt, nodename,
> +                            "compatible", "qemu,pvpanic-mmio");
> +    qemu_fdt_setprop_sized_cells(vms->fdt, nodename, "reg",
> +                                 2, base, 2, size);
> +    g_free(nodename);
> +}
> +
>   static void create_fdt(VirtMachineState *vms)
>   {
>       void *fdt = create_device_tree(&vms->fdt_size);
> @@ -1531,6 +1550,8 @@ static void machvirt_init(MachineState *machine)
>   
>       create_flash(vms, sysmem, secure_sysmem ? secure_sysmem : sysmem);
>   
> +    create_pvpanic_device(vms);
> +
>       create_gic(vms, pic);
>   
>       fdt_add_pmu_nodes(vms);
> diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h
> index 4cc57a7..ba54b84 100644
> --- a/include/hw/arm/virt.h
> +++ b/include/hw/arm/virt.h
> @@ -66,6 +66,7 @@ enum {
>       VIRT_GIC_REDIST,
>       VIRT_GIC_REDIST2,
>       VIRT_SMMU,
> +    VIRT_PVPANIC_MMIO,

All those enums are MMIO, so we can simply use VIRT_PVPANIC here.

>       VIRT_UART,
>       VIRT_MMIO,
>       VIRT_RTC,