From: Pranjal Shrivastava <praan@google.com>
To: Jason Gunthorpe <jgg@nvidia.com>
Cc: Alexandre Ghiti <alex@ghiti.fr>,
Albert Ou <aou@eecs.berkeley.edu>,
iommu@lists.linux.dev, Joerg Roedel <joro@8bytes.org>,
linux-riscv@lists.infradead.org,
Palmer Dabbelt <palmer@dabbelt.com>,
Paul Walmsley <pjw@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Tomasz Jeznach <tjeznach@rivosinc.com>,
Will Deacon <will@kernel.org>,
Andrew Jones <andrew.jones@oss.qualcomm.com>,
Fangyu Yu <fangyu.yu@linux.alibaba.com>,
patches@lists.linux.dev
Subject: Re: [PATCH v2 3/8] iommupt: Add PT_FEAT_DETAILED_GATHER
Date: Fri, 8 May 2026 20:35:09 +0000 [thread overview]
Message-ID: <af5I_Xps4Ma-qUDx@google.com> (raw)
In-Reply-To: <3-v2-b5156f657dc1+25f-iommu_riscv_inv_jgg@nvidia.com>
On Fri, May 08, 2026 at 11:53:02AM -0300, Jason Gunthorpe wrote:
> Generating the ARM SMMUv3 and RISC-V invalidation commands optimally
> requires some additional details from iommupt:
>
> - leaf_levels_bitmap is used to compute the ARM Range Invalidation
> Table Top Level hint
>
> - leaf_levels_bitmap is also used to compute the stride when
> generating single invalidations to invalidate once per leaf
>
> - table_levels_bitmap also computes the ARM TTL for future cases when
> there are no leaves
>
> Put these under a feature since only two drivers need to calculate
> them.
>
> This is also useful for the coming kunit iotlb invalidation test to
> know more about what invalidation is happening.
>
> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
> ---
The conditional gathering via PT_FEAT_DETAILED_GATHER looks nice.
Reviewed-by: Pranjal Shrivastava <praan@google.com>
Thanks,
Praan
_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv
next prev parent reply other threads:[~2026-05-08 20:35 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-08 14:52 [PATCH v2 0/8] Support non-leaf and range invalidation features in RISC-V Jason Gunthorpe
2026-05-08 14:53 ` [PATCH v2 1/8] iommu: Split the kdoc comment for struct iommu_iotlb_gather Jason Gunthorpe
2026-05-08 20:24 ` Pranjal Shrivastava
2026-05-08 14:53 ` [PATCH v2 2/8] iommupt: Add struct iommupt_pending_gather Jason Gunthorpe
2026-05-08 20:26 ` Pranjal Shrivastava
2026-05-08 14:53 ` [PATCH v2 3/8] iommupt: Add PT_FEAT_DETAILED_GATHER Jason Gunthorpe
2026-05-08 20:35 ` Pranjal Shrivastava [this message]
2026-05-08 14:53 ` [PATCH v2 4/8] iommu/riscv: Enable PT_FEAT_DETAILED_GATHER and pass gather to iotlb_inval Jason Gunthorpe
2026-05-08 14:53 ` [PATCH v2 5/8] iommu/riscv: Compute best stride for single invalidation Jason Gunthorpe
2026-05-08 14:53 ` [PATCH v2 6/8] iommu/riscv: Add RISCV_IOMMU_CAPABILITIES_NL Jason Gunthorpe
2026-05-08 14:53 ` [PATCH v2 7/8] iommu/riscv: Include the dword number in RISCV_IOMMU_CMD macros Jason Gunthorpe
2026-05-08 14:53 ` [PATCH v2 8/8] iommu/riscv: Add NAPOT range invalidation support Jason Gunthorpe
2026-05-09 20:39 ` [PATCH v2 0/8] Support non-leaf and range invalidation features in RISC-V Andrew Jones
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=af5I_Xps4Ma-qUDx@google.com \
--to=praan@google.com \
--cc=alex@ghiti.fr \
--cc=andrew.jones@oss.qualcomm.com \
--cc=aou@eecs.berkeley.edu \
--cc=fangyu.yu@linux.alibaba.com \
--cc=iommu@lists.linux.dev \
--cc=jgg@nvidia.com \
--cc=joro@8bytes.org \
--cc=linux-riscv@lists.infradead.org \
--cc=palmer@dabbelt.com \
--cc=patches@lists.linux.dev \
--cc=pjw@kernel.org \
--cc=robin.murphy@arm.com \
--cc=tjeznach@rivosinc.com \
--cc=will@kernel.org \
/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