Re: [Qemu-devel] [PATCH v3] memory: simple memory tree printer

[Jan Kiszka <jan.kiszka@siemens.com>]

On 2011-09-26 22:03, Blue Swirl wrote:
> Add a monitor command 'info mtree' to show the memory hierarchy
> much like /proc/iomem in Linux.
> 
> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
> ---
> The alias addresses are unbiased (PPC):
> 00000000-fffffffe : system
>   800a0000-800affff : alias vga.chain4 @vga.vram 00000000-0000ffff
>   80880000-808fffff : macio
>     808e0000-808fffff : macio-nvram
>     808a0000-808a0fff : pmac-ide
>     80896000-80895fff : (null)
>     80893000-8089303f : alias escc-bar @escc 00000000-0000003f
>     80888000-80888fff : dbdma
>     80880000-80880fff : heathrow-pic
>   80800000-8080ffff : vga.rom
>   80000000-807fffff : vga.vram
>   800a0000-800bffff : vga-lowmem
>   80013000-8001303f : escc
>   fee00000-fee00fff : pci-data-idx
>   fec00000-fec00fff : pci-conf-idx
>   fe000000-fe1fffff : isa-mmio
> vga.vram
> 80000000-807fffff : vga.vram
> escc
> 80013000-8001303f : escc
> ---
>  memory.c  |   88 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  memory.h  |    2 +
>  monitor.c |   13 +++++++++
>  3 files changed, 103 insertions(+), 0 deletions(-)
> 
> diff --git a/memory.c b/memory.c
> index 71e769e..53264be 100644
> --- a/memory.c
> +++ b/memory.c
> @@ -1271,3 +1271,91 @@ void set_system_io_map(MemoryRegion *mr)
>      address_space_io.root = mr;
>      memory_region_update_topology();
>  }
> +
> +typedef struct MemoryRegionList MemoryRegionList;
> +
> +struct MemoryRegionList {
> +    const MemoryRegion *mr;
> +    bool printed;

What's the point of printed? It's never true unless I'm missing
something fundamental.

> +    QTAILQ_ENTRY(MemoryRegionList) queue;
> +};
> +
> +typedef QTAILQ_HEAD(queue, MemoryRegionList) MemoryRegionListHead;
> +
> +static void mtree_print_mr(fprintf_function mon_printf, void *f,
> +                           const MemoryRegion *mr, unsigned int level,
> +                           target_phys_addr_t base,
> +                           MemoryRegionListHead *print_queue)
> +{
> +    const MemoryRegion *submr;
> +    unsigned int i;
> +
> +    for (i = 0; i < level; i++) {
> +        mon_printf(f, "  ");
> +    }
> +
> +    if (mr->alias) {
> +        MemoryRegionList *ml;
> +        bool found = false;
> +
> +        /* check if the alias is already in the queue */
> +        QTAILQ_FOREACH(ml, print_queue, queue) {
> +            if (ml->mr == mr->alias && !ml->printed) {
> +                found = true;
> +            }
> +        }
> +
> +        if (!found) {
> +            ml = g_new(MemoryRegionList, 1);
> +            ml->mr = mr->alias;
> +            ml->printed = false;
> +            QTAILQ_INSERT_TAIL(print_queue, ml, queue);
> +        }
> +        mon_printf(f, TARGET_FMT_plx "-" TARGET_FMT_plx " : alias %s @%s "
> +                   TARGET_FMT_plx "-" TARGET_FMT_plx "\n",
> +                   base + mr->addr,
> +                   base + mr->addr + (target_phys_addr_t)mr->size - 1,
> +                   mr->name,
> +                   mr->alias->name,
> +                   mr->alias_offset,
> +                   mr->alias_offset + (target_phys_addr_t)mr->size - 1);
> +    } else {
> +        mon_printf(f, TARGET_FMT_plx "-" TARGET_FMT_plx " : %s\n",
> +                   base + mr->addr,
> +                   base + mr->addr + (target_phys_addr_t)mr->size - 1,
> +                   mr->name);

Region priority is still not printed. Will send a patch.

Jan

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