From: Yi Liu <yi.l.liu@intel.com>
To: Jason Gunthorpe <jgg@nvidia.com>,
Jonathan Corbet <corbet@lwn.net>, <iommu@lists.linux.dev>,
Joerg Roedel <joro@8bytes.org>,
Justin Stitt <justinstitt@google.com>,
Kevin Tian <kevin.tian@intel.com>, <linux-doc@vger.kernel.org>,
<linux-kselftest@vger.kernel.org>, <llvm@lists.linux.dev>,
Bill Wendling <morbo@google.com>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <nick.desaulniers+lkml@gmail.com>,
Miguel Ojeda <ojeda@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
"Shuah Khan" <shuah@kernel.org>,
Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>,
Will Deacon <will@kernel.org>
Cc: Alexey Kardashevskiy <aik@amd.com>,
Alejandro Jimenez <alejandro.j.jimenez@oracle.com>,
James Gowans <jgowans@amazon.com>,
"Michael Roth" <michael.roth@amd.com>,
Pasha Tatashin <pasha.tatashin@soleen.com>,
<patches@lists.linux.dev>
Subject: Re: [PATCH v2 04/15] iommupt: Add the AMD IOMMU v1 page table format
Date: Fri, 16 May 2025 16:30:23 +0800 [thread overview]
Message-ID: <792fbcfc-430d-4d3b-aabe-51cfb6d689a2@intel.com> (raw)
In-Reply-To: <4-v2-5c26bde5c22d+58b-iommu_pt_jgg@nvidia.com>
On 2025/5/5 22:18, Jason Gunthorpe wrote:
> AMD IOMMU v1 is unique in supporting contiguous pages with a variable size
> and it can decode the full 64 bit VA space. Unlike other x86 page tables
> this explicitly does not do sign extension as part of allowing the entire
> 64 bit VA space to be supported.
aha, do you mean the canonical requirement on the addresses when talking
the singn extension? Actually, VT-d 2nd-stage page tables does not require
it as well.
"canonical address (i.e., address bits 63:N have the same value as address
bit [N-1], where N is 48 bits with 4-level paging and 57 bits with 5-level
paging"
--
Regards,
Yi Liu
next prev parent reply other threads:[~2025-05-16 8:24 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-05 14:18 [PATCH v2 00/15] Consolidate iommu page table implementations (AMD) Jason Gunthorpe
2025-05-05 14:18 ` [PATCH v2 01/15] genpt: Generic Page Table base API Jason Gunthorpe
2025-05-05 14:18 ` [PATCH v2 02/15] genpt: Add Documentation/ files Jason Gunthorpe
2025-05-07 2:37 ` Bagas Sanjaya
2025-05-13 18:53 ` Jason Gunthorpe
2025-05-15 6:21 ` Bagas Sanjaya
2025-05-05 14:18 ` [PATCH v2 03/15] iommupt: Add the basic structure of the iommu implementation Jason Gunthorpe
2025-05-14 9:23 ` Ankit Soni
2025-05-14 15:54 ` Jason Gunthorpe
2025-05-14 20:08 ` Alejandro Jimenez
2025-05-15 19:32 ` Jason Gunthorpe
2025-05-16 5:02 ` Ankit Soni
2025-05-16 20:39 ` Alejandro Jimenez
2025-05-05 14:18 ` [PATCH v2 04/15] iommupt: Add the AMD IOMMU v1 page table format Jason Gunthorpe
2025-05-05 18:48 ` ALOK TIWARI
2025-05-16 8:30 ` Yi Liu [this message]
2025-05-16 11:57 ` Jason Gunthorpe
2025-05-05 14:18 ` [PATCH v2 05/15] iommupt: Add iova_to_phys op Jason Gunthorpe
2025-05-05 14:18 ` [PATCH v2 06/15] iommupt: Add unmap_pages op Jason Gunthorpe
2025-05-05 14:18 ` [PATCH v2 07/15] iommupt: Add map_pages op Jason Gunthorpe
2025-05-13 5:15 ` Ankit Soni
2025-05-13 12:00 ` Jason Gunthorpe
2025-06-05 16:49 ` Jason Gunthorpe
2025-05-05 14:18 ` [PATCH v2 08/15] iommupt: Add read_and_clear_dirty op Jason Gunthorpe
2025-05-05 14:18 ` [PATCH v2 09/15] iommupt: Add a kunit test for Generic Page Table Jason Gunthorpe
2025-05-05 14:18 ` [PATCH v2 10/15] iommupt: Add a mock pagetable format for iommufd selftest to use Jason Gunthorpe
2025-05-05 14:18 ` [PATCH v2 11/15] iommufd: Change the selftest to use iommupt instead of xarray Jason Gunthorpe
2025-05-05 14:18 ` [PATCH v2 12/15] iommupt: Add the x86 64 bit page table format Jason Gunthorpe
2025-06-05 21:03 ` Jacob Pan
2025-06-06 11:43 ` Jason Gunthorpe
2025-05-05 14:18 ` [PATCH v2 13/15] iommu/amd: Use the generic iommu page table Jason Gunthorpe
2025-05-05 19:09 ` ALOK TIWARI
2025-05-05 14:18 ` [PATCH v2 14/15] iommu/amd: Remove AMD io_pgtable support Jason Gunthorpe
2025-05-05 14:18 ` [PATCH v2 15/15] iommupt: Add a kunit test for the IOMMU implementation Jason Gunthorpe
2025-05-05 17:44 ` Nathan Chancellor
2025-05-05 17:47 ` Jason Gunthorpe
2025-05-05 18:00 ` Nathan Chancellor
2025-05-13 1:08 ` [PATCH v2 00/15] Consolidate iommu page table implementations (AMD) Alejandro Jimenez
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=792fbcfc-430d-4d3b-aabe-51cfb6d689a2@intel.com \
--to=yi.l.liu@intel.com \
--cc=aik@amd.com \
--cc=alejandro.j.jimenez@oracle.com \
--cc=corbet@lwn.net \
--cc=iommu@lists.linux.dev \
--cc=jgg@nvidia.com \
--cc=jgowans@amazon.com \
--cc=joro@8bytes.org \
--cc=justinstitt@google.com \
--cc=kevin.tian@intel.com \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=llvm@lists.linux.dev \
--cc=michael.roth@amd.com \
--cc=morbo@google.com \
--cc=nathan@kernel.org \
--cc=nick.desaulniers+lkml@gmail.com \
--cc=ojeda@kernel.org \
--cc=pasha.tatashin@soleen.com \
--cc=patches@lists.linux.dev \
--cc=robin.murphy@arm.com \
--cc=shuah@kernel.org \
--cc=suravee.suthikulpanit@amd.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.