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Re: [PATCH v2 01/15] exec/memtxattr: add process identifier to the trans
From: |
Frank Chang |
Subject: |
Re: [PATCH v2 01/15] exec/memtxattr: add process identifier to the transaction attributes |
Date: |
Wed, 24 Apr 2024 00:33:45 +0800 |
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Daniel Henrique Barboza <dbarboza@ventanamicro.com> 於 2024年3月8日 週五 上午12:04寫道:
>
> 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>
> ---
> 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,
> --
> 2.43.2
>
>
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