Re: [PATCH] plugins: Fix physical address calculation for IO regions

[Aaron Lindsay <aaron@os.amperecomputing.com>]

For reference, this patch is intended to address this conversation:
https://lists.nongnu.org/archive/html/qemu-devel/2021-07/msg01293.html

This appears to be better than the previous version in my testing, but I
absolutely welcome being told there is a better way to solve this!

Thanks!

-Aaron

On Jul 20 15:57, Aaron Lindsay wrote:
> The address calculation for IO regions introduced by
> 
> commit 787148bf928a54b5cc86f5b434f9399e9737679c
> Author: Aaron Lindsay <aaron@os.amperecomputing.com>
>     plugins: Expose physical addresses instead of device offsets
> 
> is not always accurate. Use the more correct
> MemoryRegionSection.offset_within_address_space.

Whoops, forgot my:

Signed-off-by: Aaron Lindsay <aaron@os.amperecomputing.com>

> ---
>  plugins/api.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/plugins/api.c b/plugins/api.c
> index 5c1a413928..ba14e6f2b2 100644
> --- a/plugins/api.c
> +++ b/plugins/api.c
> @@ -319,7 +319,7 @@ uint64_t qemu_plugin_hwaddr_phys_addr(const struct qemu_plugin_hwaddr *haddr)
>              return block->offset + offset + block->mr->addr;
>          } else {
>              MemoryRegionSection *mrs = haddr->v.io.section;
> -            return haddr->v.io.offset + mrs->mr->addr;
> +            return mrs->offset_within_address_space + haddr->v.io.offset;
>          }
>      }
>  #endif
> -- 
> 2.17.1
>