From: Richard Henderson <richard.henderson@linaro.org>
To: Daniel Henrique Barboza <dbarboza@ventanamicro.com>,
qemu-devel@nongnu.org
Cc: qemu-riscv@nongnu.org, alistair.francis@wdc.com,
bmeng@tinylab.org, liwei1518@gmail.com,
zhiwei_liu@linux.alibaba.com, palmer@rivosinc.com,
ajones@ventanamicro.com, tjeznach@rivosinc.com,
Frank Chang <frank.chang@sifive.com>,
Jason Chien <jason.chien@sifive.com>
Subject: Re: [PATCH v7 01/12] exec/memtxattr: add process identifier to the transaction attributes
Date: Tue, 3 Sep 2024 13:31:26 -0700 [thread overview]
Message-ID: <f091410b-5ffb-482f-bafd-4f608755baa6@linaro.org> (raw)
In-Reply-To: <20240903201633.93182-2-dbarboza@ventanamicro.com>
On 9/3/24 13:16, 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>
> Reviewed-by: Jason Chien <jason.chien@sifive.com>
> Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
> Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
> ---
> include/exec/memattrs.h | 5 +++++
> 1 file changed, 5 insertions(+)
What is this for? What is different about it than requester_id?
r~
>
> diff --git a/include/exec/memattrs.h b/include/exec/memattrs.h
> index 14cdd8d582..e27c18f3dc 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;
> +
> + /*
> + * PID (PCI PASID) support: Limited to 8 bits process identifier.
> + */
> + unsigned int pid:8;
> } MemTxAttrs;
>
> /* Bus masters which don't specify any attributes will get this,
next prev parent reply other threads:[~2024-09-03 20:32 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-03 20:16 [PATCH v7 00/12] riscv: QEMU RISC-V IOMMU Support Daniel Henrique Barboza
2024-09-03 20:16 ` [PATCH v7 01/12] exec/memtxattr: add process identifier to the transaction attributes Daniel Henrique Barboza
2024-09-03 20:31 ` Richard Henderson [this message]
2024-09-03 20:59 ` Daniel Henrique Barboza
2024-09-03 20:16 ` [PATCH v7 02/12] hw/riscv: add riscv-iommu-bits.h Daniel Henrique Barboza
2024-09-03 20:16 ` [PATCH v7 03/12] hw/riscv: add RISC-V IOMMU base emulation Daniel Henrique Barboza
2024-09-03 20:16 ` [PATCH v7 04/12] pci-ids.rst: add Red Hat pci-id for RISC-V IOMMU device Daniel Henrique Barboza
2024-09-03 20:16 ` [PATCH v7 05/12] hw/riscv: add riscv-iommu-pci reference device Daniel Henrique Barboza
2024-09-03 20:16 ` [PATCH v7 06/12] hw/riscv/virt.c: support for RISC-V IOMMU PCIDevice hotplug Daniel Henrique Barboza
2024-09-03 20:16 ` [PATCH v7 07/12] test/qtest: add riscv-iommu-pci tests Daniel Henrique Barboza
2024-09-03 20:16 ` [PATCH v7 08/12] hw/riscv/riscv-iommu: add Address Translation Cache (IOATC) Daniel Henrique Barboza
2024-09-03 20:16 ` [PATCH v7 09/12] hw/riscv/riscv-iommu: add ATS support Daniel Henrique Barboza
2024-09-03 20:16 ` [PATCH v7 10/12] hw/riscv/riscv-iommu: add DBG support Daniel Henrique Barboza
2024-09-03 20:16 ` [PATCH v7 11/12] qtest/riscv-iommu-test: add init queues test Daniel Henrique Barboza
2024-09-03 20:16 ` [PATCH v7 12/12] docs/specs: add riscv-iommu Daniel Henrique Barboza
2024-09-06 5:21 ` [PATCH v7 00/12] riscv: QEMU RISC-V IOMMU Support Alistair Francis
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=f091410b-5ffb-482f-bafd-4f608755baa6@linaro.org \
--to=richard.henderson@linaro.org \
--cc=ajones@ventanamicro.com \
--cc=alistair.francis@wdc.com \
--cc=bmeng@tinylab.org \
--cc=dbarboza@ventanamicro.com \
--cc=frank.chang@sifive.com \
--cc=jason.chien@sifive.com \
--cc=liwei1518@gmail.com \
--cc=palmer@rivosinc.com \
--cc=qemu-devel@nongnu.org \
--cc=qemu-riscv@nongnu.org \
--cc=tjeznach@rivosinc.com \
--cc=zhiwei_liu@linux.alibaba.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).