Re: [PATCH v4 01/14] exec/memtxattr: add process identifier to the transaction attributes

[Jason Chien]

Reviewed-by: Jason Chien <jason.chien@sifive.com>

On 2024/6/25 上午 04:18, Daniel Henrique Barboza wrote:
> From: Tomasz Jeznach <tjeznach@rivosinc.com>
>
> Extend memory transaction attributes with process identifier to allow
> per-request address translation logic to use requester_id / process_id
> to identify memory mapping (e.g. enabling IOMMU w/ PASID translations).
>
> Signed-off-by: Tomasz Jeznach <tjeznach@rivosinc.com>
> Reviewed-by: Frank Chang <frank.chang@sifive.com>
> ---
>   include/exec/memattrs.h | 5 +++++
>   1 file changed, 5 insertions(+)
>
> diff --git a/include/exec/memattrs.h b/include/exec/memattrs.h
> index 14cdd8d582..46d0725416 100644
> --- a/include/exec/memattrs.h
> +++ b/include/exec/memattrs.h
> @@ -52,6 +52,11 @@ typedef struct MemTxAttrs {
>       unsigned int memory:1;
>       /* Requester ID (for MSI for example) */
>       unsigned int requester_id:16;
> +
> +    /*
> +     * PCI PASID support: Limited to 8 bits process identifier.
> +     */
> +    unsigned int pasid:8;
>   } MemTxAttrs;
>   
>   /* Bus masters which don't specify any attributes will get this,