source large_stringclasses 2
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values | critique large_stringlengths 61 3.04M ⌀ | metadata dict |
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lkml | [PATCH v2 00/14] Add SPDX SBOM generation tool | This patch series introduces a Python-based tool for generating SBOM
documents in the SPDX 3.0.1 format for kernel builds.
A Software Bill of Materials (SBOM) describes the individual components
of a software product. For the kernel, the goal is to describe the
distributable build outputs (typically the kernel image a... | Add hardcoded dependencies and .incbin directive parsing to
discover dependencies not tracked by .cmd files.
Co-developed-by: Maximilian Huber <maximilian.huber@tngtech.com>
Signed-off-by: Maximilian Huber <maximilian.huber@tngtech.com>
Signed-off-by: Luis Augenstein <luis.augenstein@tngtech.com>
---
tools/sbom/sbom/... | {
"author": "Luis Augenstein <luis.augenstein@tngtech.com>",
"date": "Tue, 20 Jan 2026 12:53:43 +0100",
"thread_id": "6ed0fe99-3724-40c2-8d98-3309a3cf0104@tngtech.com.mbox.gz"
} |
lkml | [PATCH v2 00/14] Add SPDX SBOM generation tool | This patch series introduces a Python-based tool for generating SBOM
documents in the SPDX 3.0.1 format for kernel builds.
A Software Bill of Materials (SBOM) describes the individual components
of a software product. For the kernel, the goal is to describe the
distributable build outputs (typically the kernel image a... | Implement savedcmd_parser module for extracting input files
from kernel build commands.
Co-developed-by: Maximilian Huber <maximilian.huber@tngtech.com>
Signed-off-by: Maximilian Huber <maximilian.huber@tngtech.com>
Signed-off-by: Luis Augenstein <luis.augenstein@tngtech.com>
---
tools/sbom/sbom/cmd_graph/savedcmd_pa... | {
"author": "Luis Augenstein <luis.augenstein@tngtech.com>",
"date": "Tue, 20 Jan 2026 12:53:41 +0100",
"thread_id": "6ed0fe99-3724-40c2-8d98-3309a3cf0104@tngtech.com.mbox.gz"
} |
lkml | [PATCH v2 00/14] Add SPDX SBOM generation tool | This patch series introduces a Python-based tool for generating SBOM
documents in the SPDX 3.0.1 format for kernel builds.
A Software Bill of Materials (SBOM) describes the individual components
of a software product. For the kernel, the goal is to describe the
distributable build outputs (typically the kernel image a... | Implement command graph generation by parsing .cmd files to build a
dependency graph.
Add CmdGraph, CmdGraphNode, and .cmd file parsing.
Supports generating a flat list of used source files via the
--generate-used-files cli argument.
Co-developed-by: Maximilian Huber <maximilian.huber@tngtech.com>
Signed-off-by: Maxim... | {
"author": "Luis Augenstein <luis.augenstein@tngtech.com>",
"date": "Tue, 20 Jan 2026 12:53:42 +0100",
"thread_id": "6ed0fe99-3724-40c2-8d98-3309a3cf0104@tngtech.com.mbox.gz"
} |
lkml | [PATCH v2 00/14] Add SPDX SBOM generation tool | This patch series introduces a Python-based tool for generating SBOM
documents in the SPDX 3.0.1 format for kernel builds.
A Software Bill of Materials (SBOM) describes the individual components
of a software product. For the kernel, the goal is to describe the
distributable build outputs (typically the kernel image a... | Implement Python dataclasses to model the SPDX classes
required within an SPDX document. The class and property
names are consistent with the SPDX 3.0.1 specification.
Co-developed-by: Maximilian Huber <maximilian.huber@tngtech.com>
Signed-off-by: Maximilian Huber <maximilian.huber@tngtech.com>
Signed-off-by: Luis Aug... | {
"author": "Luis Augenstein <luis.augenstein@tngtech.com>",
"date": "Tue, 20 Jan 2026 12:53:44 +0100",
"thread_id": "6ed0fe99-3724-40c2-8d98-3309a3cf0104@tngtech.com.mbox.gz"
} |
lkml | [PATCH v2 00/14] Add SPDX SBOM generation tool | This patch series introduces a Python-based tool for generating SBOM
documents in the SPDX 3.0.1 format for kernel builds.
A Software Bill of Materials (SBOM) describes the individual components
of a software product. For the kernel, the goal is to describe the
distributable build outputs (typically the kernel image a... | Add infrastructure to serialize an SPDX graph as a JSON-LD
document. NamespaceMaps in the SPDX document are converted
to custom prefixes in the @context field of the JSON-LD output.
The SBOM tool uses NamespaceMaps solely to shorten SPDX IDs,
avoiding repetition of full namespace URIs by using short prefixes.
Co-deve... | {
"author": "Luis Augenstein <luis.augenstein@tngtech.com>",
"date": "Tue, 20 Jan 2026 12:53:45 +0100",
"thread_id": "6ed0fe99-3724-40c2-8d98-3309a3cf0104@tngtech.com.mbox.gz"
} |
lkml | [PATCH v2 00/14] Add SPDX SBOM generation tool | This patch series introduces a Python-based tool for generating SBOM
documents in the SPDX 3.0.1 format for kernel builds.
A Software Bill of Materials (SBOM) describes the individual components
of a software product. For the kernel, the goal is to describe the
distributable build outputs (typically the kernel image a... | Implement shared SPDX elements used in all three documents.
Co-developed-by: Maximilian Huber <maximilian.huber@tngtech.com>
Signed-off-by: Maximilian Huber <maximilian.huber@tngtech.com>
Signed-off-by: Luis Augenstein <luis.augenstein@tngtech.com>
---
tools/sbom/sbom/config.py | 25 ++++++++++++++... | {
"author": "Luis Augenstein <luis.augenstein@tngtech.com>",
"date": "Tue, 20 Jan 2026 12:53:46 +0100",
"thread_id": "6ed0fe99-3724-40c2-8d98-3309a3cf0104@tngtech.com.mbox.gz"
} |
lkml | [PATCH v2 00/14] Add SPDX SBOM generation tool | This patch series introduces a Python-based tool for generating SBOM
documents in the SPDX 3.0.1 format for kernel builds.
A Software Bill of Materials (SBOM) describes the individual components
of a software product. For the kernel, the goal is to describe the
distributable build outputs (typically the kernel image a... | Implement the kernel_file module that collects file metadata,
including license identifier for source files, SHA-256 hash,
Git blob object ID, an estimation of the file type, and
whether files belong to the source, build, or output SBOM.
Co-developed-by: Maximilian Huber <maximilian.huber@tngtech.com>
Signed-off-by: M... | {
"author": "Luis Augenstein <luis.augenstein@tngtech.com>",
"date": "Tue, 20 Jan 2026 12:53:47 +0100",
"thread_id": "6ed0fe99-3724-40c2-8d98-3309a3cf0104@tngtech.com.mbox.gz"
} |
lkml | [PATCH v2 00/14] Add SPDX SBOM generation tool | This patch series introduces a Python-based tool for generating SBOM
documents in the SPDX 3.0.1 format for kernel builds.
A Software Bill of Materials (SBOM) describes the individual components
of a software product. For the kernel, the goal is to describe the
distributable build outputs (typically the kernel image a... | Implement the SPDX source graph which contains all source files
involved during the build, along with the licensing information
for each file.
Co-developed-by: Maximilian Huber <maximilian.huber@tngtech.com>
Signed-off-by: Maximilian Huber <maximilian.huber@tngtech.com>
Signed-off-by: Luis Augenstein <luis.augenstein@... | {
"author": "Luis Augenstein <luis.augenstein@tngtech.com>",
"date": "Tue, 20 Jan 2026 12:53:49 +0100",
"thread_id": "6ed0fe99-3724-40c2-8d98-3309a3cf0104@tngtech.com.mbox.gz"
} |
lkml | [PATCH v2 00/14] Add SPDX SBOM generation tool | This patch series introduces a Python-based tool for generating SBOM
documents in the SPDX 3.0.1 format for kernel builds.
A Software Bill of Materials (SBOM) describes the individual components
of a software product. For the kernel, the goal is to describe the
distributable build outputs (typically the kernel image a... | Implement the SPDX output graph which contains the distributable
build outputs and high level metadata about the build.
Co-developed-by: Maximilian Huber <maximilian.huber@tngtech.com>
Signed-off-by: Maximilian Huber <maximilian.huber@tngtech.com>
Signed-off-by: Luis Augenstein <luis.augenstein@tngtech.com>
---
tools... | {
"author": "Luis Augenstein <luis.augenstein@tngtech.com>",
"date": "Tue, 20 Jan 2026 12:53:48 +0100",
"thread_id": "6ed0fe99-3724-40c2-8d98-3309a3cf0104@tngtech.com.mbox.gz"
} |
lkml | [PATCH v2 00/14] Add SPDX SBOM generation tool | This patch series introduces a Python-based tool for generating SBOM
documents in the SPDX 3.0.1 format for kernel builds.
A Software Bill of Materials (SBOM) describes the individual components
of a software product. For the kernel, the goal is to describe the
distributable build outputs (typically the kernel image a... | Verify that SPDX-License-Identifier headers at the top of source files
are parsed correctly.
Co-developed-by: Maximilian Huber <maximilian.huber@tngtech.com>
Signed-off-by: Maximilian Huber <maximilian.huber@tngtech.com>
Signed-off-by: Luis Augenstein <luis.augenstein@tngtech.com>
---
tools/sbom/tests/spdx_graph/__in... | {
"author": "Luis Augenstein <luis.augenstein@tngtech.com>",
"date": "Tue, 20 Jan 2026 12:53:52 +0100",
"thread_id": "6ed0fe99-3724-40c2-8d98-3309a3cf0104@tngtech.com.mbox.gz"
} |
lkml | [PATCH v2 00/14] Add SPDX SBOM generation tool | This patch series introduces a Python-based tool for generating SBOM
documents in the SPDX 3.0.1 format for kernel builds.
A Software Bill of Materials (SBOM) describes the individual components
of a software product. For the kernel, the goal is to describe the
distributable build outputs (typically the kernel image a... | Implement the SPDX build graph to describe the relationships
between source files in the source SBOM and output files in
the output SBOM.
Co-developed-by: Maximilian Huber <maximilian.huber@tngtech.com>
Signed-off-by: Maximilian Huber <maximilian.huber@tngtech.com>
Signed-off-by: Luis Augenstein <luis.augenstein@tngte... | {
"author": "Luis Augenstein <luis.augenstein@tngtech.com>",
"date": "Tue, 20 Jan 2026 12:53:50 +0100",
"thread_id": "6ed0fe99-3724-40c2-8d98-3309a3cf0104@tngtech.com.mbox.gz"
} |
lkml | [PATCH v2 00/14] Add SPDX SBOM generation tool | This patch series introduces a Python-based tool for generating SBOM
documents in the SPDX 3.0.1 format for kernel builds.
A Software Bill of Materials (SBOM) describes the individual components
of a software product. For the kernel, the goal is to describe the
distributable build outputs (typically the kernel image a... | Add unit tests to verify that command parsers correctly extract
input files from build commands.
Co-developed-by: Maximilian Huber <maximilian.huber@tngtech.com>
Signed-off-by: Maximilian Huber <maximilian.huber@tngtech.com>
Signed-off-by: Luis Augenstein <luis.augenstein@tngtech.com>
---
tools/sbom/tests/__init__.py... | {
"author": "Luis Augenstein <luis.augenstein@tngtech.com>",
"date": "Tue, 20 Jan 2026 12:53:51 +0100",
"thread_id": "6ed0fe99-3724-40c2-8d98-3309a3cf0104@tngtech.com.mbox.gz"
} |
lkml | [PATCH v2 00/14] Add SPDX SBOM generation tool | This patch series introduces a Python-based tool for generating SBOM
documents in the SPDX 3.0.1 format for kernel builds.
A Software Bill of Materials (SBOM) describes the individual components
of a software product. For the kernel, the goal is to describe the
distributable build outputs (typically the kernel image a... | On Tue, Jan 20, 2026 at 12:53:38PM +0100, Luis Augenstein wrote:
I'm still getting:
make[3]: Nothing to be done for 'sbom'.
When rebuilding the kernel and nothing needs to be done for the sbom.
That message should not be there, right?
thanks,
greg k-h | {
"author": "Greg KH <gregkh@linuxfoundation.org>",
"date": "Tue, 20 Jan 2026 16:40:09 +0100",
"thread_id": "6ed0fe99-3724-40c2-8d98-3309a3cf0104@tngtech.com.mbox.gz"
} |
lkml | [PATCH v2 00/14] Add SPDX SBOM generation tool | This patch series introduces a Python-based tool for generating SBOM
documents in the SPDX 3.0.1 format for kernel builds.
A Software Bill of Materials (SBOM) describes the individual components
of a software product. For the kernel, the goal is to describe the
distributable build outputs (typically the kernel image a... | On Thu, Jan 22, 2026 at 4:31 AM Luis Augenstein
<luis.augenstein@tngtech.com> wrote:
Hmm... Is this supposed to have two files in `expected`?
I mean, `core.o` is really the output of the rule, even if it gets
modified in-place in the middle.
Cheers,
Miguel | {
"author": "Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>",
"date": "Thu, 22 Jan 2026 07:00:19 +0100",
"thread_id": "6ed0fe99-3724-40c2-8d98-3309a3cf0104@tngtech.com.mbox.gz"
} |
lkml | [PATCH v2 00/14] Add SPDX SBOM generation tool | This patch series introduces a Python-based tool for generating SBOM
documents in the SPDX 3.0.1 format for kernel builds.
A Software Bill of Materials (SBOM) describes the individual components
of a software product. For the kernel, the goal is to describe the
distributable build outputs (typically the kernel image a... | On Wed, Jan 21, 2026 at 6:55 AM Luis Augenstein
<luis.augenstein@tngtech.com> wrote:
I am out of the loop, and I don't know the requirements here, but what
kind of approaches were considered for this?
Parsing the `.cmd`s seems a bit ad-hoc / after-the-fact approach, and
from a very cursory look at the patches, it see... | {
"author": "Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>",
"date": "Thu, 22 Jan 2026 07:18:18 +0100",
"thread_id": "6ed0fe99-3724-40c2-8d98-3309a3cf0104@tngtech.com.mbox.gz"
} |
lkml | [PATCH v2 00/14] Add SPDX SBOM generation tool | This patch series introduces a Python-based tool for generating SBOM
documents in the SPDX 3.0.1 format for kernel builds.
A Software Bill of Materials (SBOM) describes the individual components
of a software product. For the kernel, the goal is to describe the
distributable build outputs (typically the kernel image a... | On Thu, Jan 22, 2026 at 07:18:18AM +0100, Miguel Ojeda wrote:
Lots of different attempts, usually using bpf and other run-time tracing
tools. But it was determined that we already have this info in our
build dependancy files, so parsing them was picked.
If you know of a better way, that would be great!
It should ... | {
"author": "Greg KH <gregkh@linuxfoundation.org>",
"date": "Thu, 22 Jan 2026 07:35:42 +0100",
"thread_id": "6ed0fe99-3724-40c2-8d98-3309a3cf0104@tngtech.com.mbox.gz"
} |
lkml | [PATCH v2 00/14] Add SPDX SBOM generation tool | This patch series introduces a Python-based tool for generating SBOM
documents in the SPDX 3.0.1 format for kernel builds.
A Software Bill of Materials (SBOM) describes the individual components
of a software product. For the kernel, the goal is to describe the
distributable build outputs (typically the kernel image a... | On Thu, Jan 22, 2026 at 7:35 AM Greg KH <gregkh@linuxfoundation.org> wrote:
Yes, if I understand correctly, then this should be done on the build
system side (i.e. I don't see how BPF/tracing could achieve this, so
maybe I am missing something), but what I meant is that there are
several ways to do this in the build s... | {
"author": "Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>",
"date": "Sun, 25 Jan 2026 16:20:40 +0100",
"thread_id": "6ed0fe99-3724-40c2-8d98-3309a3cf0104@tngtech.com.mbox.gz"
} |
lkml | [PATCH v2 00/14] Add SPDX SBOM generation tool | This patch series introduces a Python-based tool for generating SBOM
documents in the SPDX 3.0.1 format for kernel builds.
A Software Bill of Materials (SBOM) describes the individual components
of a software product. For the kernel, the goal is to describe the
distributable build outputs (typically the kernel image a... | On Thu, Jan 22, 2026 at 9:32 PM Luis Augenstein
<luis.augenstein@tngtech.com> wrote:
I was not suggesting to take it out of `make` completely if the
environment is needed, but rather have the user call the target (which
could still depend on the kernel build like you have it now).
For instance, for generating the rus... | {
"author": "Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>",
"date": "Sun, 25 Jan 2026 16:30:16 +0100",
"thread_id": "6ed0fe99-3724-40c2-8d98-3309a3cf0104@tngtech.com.mbox.gz"
} |
lkml | [PATCH v2 00/14] Add SPDX SBOM generation tool | This patch series introduces a Python-based tool for generating SBOM
documents in the SPDX 3.0.1 format for kernel builds.
A Software Bill of Materials (SBOM) describes the individual components
of a software product. For the kernel, the goal is to describe the
distributable build outputs (typically the kernel image a... | On Sun, Jan 25, 2026 at 4:20 PM Miguel Ojeda
<miguel.ojeda.sandonis@gmail.com> wrote:
Well, I guess the SBOM could be saved into the kernel itself (and
perhaps retrieved in different ways, e.g. at runtime), in which case,
then an option definitely makes sense.
Cheers,
Miguel | {
"author": "Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>",
"date": "Sun, 25 Jan 2026 16:33:28 +0100",
"thread_id": "6ed0fe99-3724-40c2-8d98-3309a3cf0104@tngtech.com.mbox.gz"
} |
lkml | [PATCH v2 00/14] Add SPDX SBOM generation tool | This patch series introduces a Python-based tool for generating SBOM
documents in the SPDX 3.0.1 format for kernel builds.
A Software Bill of Materials (SBOM) describes the individual components
of a software product. For the kernel, the goal is to describe the
distributable build outputs (typically the kernel image a... | On Sun, Jan 25, 2026 at 04:20:40PM +0100, Miguel Ojeda wrote:
for a horrible hack of an example of how you can do this using
bpf/tracing, see this "fun" thing that I use every so often:
https://github.com/gregkh/gregkh-linux/blob/master/scripts/trace_kernel_build.sh
it uses bpftrace to inject a script and then do a b... | {
"author": "Greg KH <gregkh@linuxfoundation.org>",
"date": "Sun, 25 Jan 2026 16:34:46 +0100",
"thread_id": "6ed0fe99-3724-40c2-8d98-3309a3cf0104@tngtech.com.mbox.gz"
} |
lkml | [PATCH v2 00/14] Add SPDX SBOM generation tool | This patch series introduces a Python-based tool for generating SBOM
documents in the SPDX 3.0.1 format for kernel builds.
A Software Bill of Materials (SBOM) describes the individual components
of a software product. For the kernel, the goal is to describe the
distributable build outputs (typically the kernel image a... | On Sun, Jan 25, 2026 at 04:33:28PM +0100, Miguel Ojeda wrote:
Ick, let's not dump the HUGE sbom json file inside the binary kernel
image itself, unless you want to do something like /proc/sbom.gz?
That would be funny, but a big waste of memory :)
greg k-h | {
"author": "Greg KH <gregkh@linuxfoundation.org>",
"date": "Sun, 25 Jan 2026 16:40:52 +0100",
"thread_id": "6ed0fe99-3724-40c2-8d98-3309a3cf0104@tngtech.com.mbox.gz"
} |
lkml | [PATCH v2 00/14] Add SPDX SBOM generation tool | This patch series introduces a Python-based tool for generating SBOM
documents in the SPDX 3.0.1 format for kernel builds.
A Software Bill of Materials (SBOM) describes the individual components
of a software product. For the kernel, the goal is to describe the
distributable build outputs (typically the kernel image a... | On Sun, Jan 25, 2026 at 4:34 PM Greg KH <gregkh@linuxfoundation.org> wrote:
Oof... So you really meant tracing the builder. :)
Yeah, I am aware -- I mentioned both sides to explain the upsides and
my worry about hardcoding all this stuff out of band.
Well, Make can ""do"" things like that, in the sense that we can... | {
"author": "Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>",
"date": "Sun, 25 Jan 2026 18:24:51 +0100",
"thread_id": "6ed0fe99-3724-40c2-8d98-3309a3cf0104@tngtech.com.mbox.gz"
} |
lkml | [PATCH v2 00/14] Add SPDX SBOM generation tool | This patch series introduces a Python-based tool for generating SBOM
documents in the SPDX 3.0.1 format for kernel builds.
A Software Bill of Materials (SBOM) describes the individual components
of a software product. For the kernel, the goal is to describe the
distributable build outputs (typically the kernel image a... | Hi Luis, Greg, and Miguel,
Sorry for not having any input up until this point, as I felt this was
not going to be ready for 6.20/7.0 and I wanted to focus on getting
things ready for that release (on top of other work). Some high level
comments based on what has been discussed so far to follow, it was going
to be hard... | {
"author": "Nathan Chancellor <nathan@kernel.org>",
"date": "Tue, 27 Jan 2026 16:10:37 -0700",
"thread_id": "6ed0fe99-3724-40c2-8d98-3309a3cf0104@tngtech.com.mbox.gz"
} |
lkml | [PATCH v4 00/13] Enable I2C on SA8255p Qualcomm platforms | The Qualcomm automotive SA8255p SoC relies on firmware to configure
platform resources, including clocks, interconnects and TLMM.
The driver requests resources operations over SCMI using power
and performance protocols.
The SCMI power protocol enables or disables resources like clocks,
interconnect paths, and TLMM (GP... | The "qup-memory" interconnect path is optional and may not be defined
in all device trees. Unroll the loop-based ICC path initialization to
allow specific error handling for each path type.
The "qup-core" and "qup-config" paths remain mandatory and will fail
probe if missing, while "qup-memory" is now handled as optio... | {
"author": "Praveen Talari <praveen.talari@oss.qualcomm.com>",
"date": "Mon, 2 Feb 2026 23:39:10 +0530",
"thread_id": "20260202180922.1692428-4-praveen.talari@oss.qualcomm.com.mbox.gz"
} |
lkml | [PATCH v4 00/13] Enable I2C on SA8255p Qualcomm platforms | The Qualcomm automotive SA8255p SoC relies on firmware to configure
platform resources, including clocks, interconnects and TLMM.
The driver requests resources operations over SCMI using power
and performance protocols.
The SCMI power protocol enables or disables resources like clocks,
interconnect paths, and TLMM (GP... | Add a new function geni_icc_set_bw_ab() that allows callers to set
average bandwidth values for all ICC (Interconnect) paths in a single
call. This function takes separate parameters for core, config, and DDR
average bandwidth values and applies them to the respective ICC paths.
This provides a more convenient API for... | {
"author": "Praveen Talari <praveen.talari@oss.qualcomm.com>",
"date": "Mon, 2 Feb 2026 23:39:11 +0530",
"thread_id": "20260202180922.1692428-4-praveen.talari@oss.qualcomm.com.mbox.gz"
} |
lkml | [PATCH v4 00/13] Enable I2C on SA8255p Qualcomm platforms | The Qualcomm automotive SA8255p SoC relies on firmware to configure
platform resources, including clocks, interconnects and TLMM.
The driver requests resources operations over SCMI using power
and performance protocols.
The SCMI power protocol enables or disables resources like clocks,
interconnect paths, and TLMM (GP... | The GENI Serial Engine drivers (I2C, SPI, and SERIAL) currently duplicate
code for initializing shared resources such as clocks and interconnect
paths.
Introduce a new helper API, geni_se_resources_init(), to centralize this
initialization logic, improving modularity and simplifying the probe
function.
Signed-off-by:... | {
"author": "Praveen Talari <praveen.talari@oss.qualcomm.com>",
"date": "Mon, 2 Feb 2026 23:39:12 +0530",
"thread_id": "20260202180922.1692428-4-praveen.talari@oss.qualcomm.com.mbox.gz"
} |
lkml | [PATCH v4 00/13] Enable I2C on SA8255p Qualcomm platforms | The Qualcomm automotive SA8255p SoC relies on firmware to configure
platform resources, including clocks, interconnects and TLMM.
The driver requests resources operations over SCMI using power
and performance protocols.
The SCMI power protocol enables or disables resources like clocks,
interconnect paths, and TLMM (GP... | Currently, core clk is handled individually in protocol drivers like
the I2C driver. Move this clock management to the common clock APIs
(geni_se_clks_on/off) that are already present in the common GENI SE
driver to maintain consistency across all protocol drivers.
Core clk is now properly managed alongside the other ... | {
"author": "Praveen Talari <praveen.talari@oss.qualcomm.com>",
"date": "Mon, 2 Feb 2026 23:39:13 +0530",
"thread_id": "20260202180922.1692428-4-praveen.talari@oss.qualcomm.com.mbox.gz"
} |
lkml | [PATCH v4 00/13] Enable I2C on SA8255p Qualcomm platforms | The Qualcomm automotive SA8255p SoC relies on firmware to configure
platform resources, including clocks, interconnects and TLMM.
The driver requests resources operations over SCMI using power
and performance protocols.
The SCMI power protocol enables or disables resources like clocks,
interconnect paths, and TLMM (GP... | The GENI SE protocol drivers (I2C, SPI, UART) implement similar resource
activation/deactivation sequences independently, leading to code
duplication.
Introduce geni_se_resources_activate()/geni_se_resources_deactivate() to
power on/off resources.The activate function enables ICC, clocks, and TLMM
whereas the deactiva... | {
"author": "Praveen Talari <praveen.talari@oss.qualcomm.com>",
"date": "Mon, 2 Feb 2026 23:39:14 +0530",
"thread_id": "20260202180922.1692428-4-praveen.talari@oss.qualcomm.com.mbox.gz"
} |
lkml | [PATCH v4 00/13] Enable I2C on SA8255p Qualcomm platforms | The Qualcomm automotive SA8255p SoC relies on firmware to configure
platform resources, including clocks, interconnects and TLMM.
The driver requests resources operations over SCMI using power
and performance protocols.
The SCMI power protocol enables or disables resources like clocks,
interconnect paths, and TLMM (GP... | The GENI Serial Engine drivers (I2C, SPI, and SERIAL) currently handle
the attachment of power domains. This often leads to duplicated code
logic across different driver probe functions.
Introduce a new helper API, geni_se_domain_attach(), to centralize
the logic for attaching "power" and "perf" domains to the GENI SE... | {
"author": "Praveen Talari <praveen.talari@oss.qualcomm.com>",
"date": "Mon, 2 Feb 2026 23:39:15 +0530",
"thread_id": "20260202180922.1692428-4-praveen.talari@oss.qualcomm.com.mbox.gz"
} |
lkml | [PATCH v4 00/13] Enable I2C on SA8255p Qualcomm platforms | The Qualcomm automotive SA8255p SoC relies on firmware to configure
platform resources, including clocks, interconnects and TLMM.
The driver requests resources operations over SCMI using power
and performance protocols.
The SCMI power protocol enables or disables resources like clocks,
interconnect paths, and TLMM (GP... | The GENI Serial Engine (SE) drivers (I2C, SPI, and SERIAL) currently
manage performance levels and operating points directly. This resulting
in code duplication across drivers. such as configuring a specific level
or find and apply an OPP based on a clock frequency.
Introduce two new helper APIs, geni_se_set_perf_leve... | {
"author": "Praveen Talari <praveen.talari@oss.qualcomm.com>",
"date": "Mon, 2 Feb 2026 23:39:16 +0530",
"thread_id": "20260202180922.1692428-4-praveen.talari@oss.qualcomm.com.mbox.gz"
} |
lkml | [PATCH v4 00/13] Enable I2C on SA8255p Qualcomm platforms | The Qualcomm automotive SA8255p SoC relies on firmware to configure
platform resources, including clocks, interconnects and TLMM.
The driver requests resources operations over SCMI using power
and performance protocols.
The SCMI power protocol enables or disables resources like clocks,
interconnect paths, and TLMM (GP... | Add DT bindings for the QUP GENI I2C controller on sa8255p platforms.
SA8255p platform abstracts resources such as clocks, interconnect and
GPIO pins configuration in Firmware. SCMI power and perf protocol
are utilized to request resource configurations.
SA8255p platform does not require the Serial Engine (SE) common... | {
"author": "Praveen Talari <praveen.talari@oss.qualcomm.com>",
"date": "Mon, 2 Feb 2026 23:39:17 +0530",
"thread_id": "20260202180922.1692428-4-praveen.talari@oss.qualcomm.com.mbox.gz"
} |
lkml | [PATCH v4 00/13] Enable I2C on SA8255p Qualcomm platforms | The Qualcomm automotive SA8255p SoC relies on firmware to configure
platform resources, including clocks, interconnects and TLMM.
The driver requests resources operations over SCMI using power
and performance protocols.
The SCMI power protocol enables or disables resources like clocks,
interconnect paths, and TLMM (GP... | Moving the serial engine setup to geni_i2c_init() API for a cleaner
probe function and utilizes the PM runtime API to control resources
instead of direct clock-related APIs for better resource management.
Enables reusability of the serial engine initialization like
hibernation and deep sleep features where hardware co... | {
"author": "Praveen Talari <praveen.talari@oss.qualcomm.com>",
"date": "Mon, 2 Feb 2026 23:39:18 +0530",
"thread_id": "20260202180922.1692428-4-praveen.talari@oss.qualcomm.com.mbox.gz"
} |
lkml | [PATCH v4 00/13] Enable I2C on SA8255p Qualcomm platforms | The Qualcomm automotive SA8255p SoC relies on firmware to configure
platform resources, including clocks, interconnects and TLMM.
The driver requests resources operations over SCMI using power
and performance protocols.
The SCMI power protocol enables or disables resources like clocks,
interconnect paths, and TLMM (GP... | Refactor the resource initialization in geni_i2c_probe() by introducing
a new geni_i2c_resources_init() function and utilizing the common
geni_se_resources_init() framework and clock frequency mapping, making the
probe function cleaner.
Acked-by: Viken Dadhaniya <viken.dadhaniya@oss.qualcomm.com>
Signed-off-by: Pravee... | {
"author": "Praveen Talari <praveen.talari@oss.qualcomm.com>",
"date": "Mon, 2 Feb 2026 23:39:19 +0530",
"thread_id": "20260202180922.1692428-4-praveen.talari@oss.qualcomm.com.mbox.gz"
} |
lkml | [PATCH v4 00/13] Enable I2C on SA8255p Qualcomm platforms | The Qualcomm automotive SA8255p SoC relies on firmware to configure
platform resources, including clocks, interconnects and TLMM.
The driver requests resources operations over SCMI using power
and performance protocols.
The SCMI power protocol enables or disables resources like clocks,
interconnect paths, and TLMM (GP... | To manage GENI serial engine resources during runtime power management,
drivers currently need to call functions for ICC, clock, and
SE resource operations in both suspend and resume paths, resulting in
code duplication across drivers.
The new geni_se_resources_activate() and geni_se_resources_deactivate()
helper APIs... | {
"author": "Praveen Talari <praveen.talari@oss.qualcomm.com>",
"date": "Mon, 2 Feb 2026 23:39:20 +0530",
"thread_id": "20260202180922.1692428-4-praveen.talari@oss.qualcomm.com.mbox.gz"
} |
lkml | [PATCH v4 00/13] Enable I2C on SA8255p Qualcomm platforms | The Qualcomm automotive SA8255p SoC relies on firmware to configure
platform resources, including clocks, interconnects and TLMM.
The driver requests resources operations over SCMI using power
and performance protocols.
The SCMI power protocol enables or disables resources like clocks,
interconnect paths, and TLMM (GP... | To avoid repeatedly fetching and checking platform data across various
functions, store the struct of_device_id data directly in the i2c
private structure. This change enhances code maintainability and reduces
redundancy.
Acked-by: Viken Dadhaniya <viken.dadhaniya@oss.qualcomm.com>
Signed-off-by: Praveen Talari <prave... | {
"author": "Praveen Talari <praveen.talari@oss.qualcomm.com>",
"date": "Mon, 2 Feb 2026 23:39:21 +0530",
"thread_id": "20260202180922.1692428-4-praveen.talari@oss.qualcomm.com.mbox.gz"
} |
lkml | [PATCH v4 00/13] Enable I2C on SA8255p Qualcomm platforms | The Qualcomm automotive SA8255p SoC relies on firmware to configure
platform resources, including clocks, interconnects and TLMM.
The driver requests resources operations over SCMI using power
and performance protocols.
The SCMI power protocol enables or disables resources like clocks,
interconnect paths, and TLMM (GP... | The Qualcomm automotive SA8255p SoC relies on firmware to configure
platform resources, including clocks, interconnects and TLMM.
The driver requests resources operations over SCMI using power
and performance protocols.
The SCMI power protocol enables or disables resources like clocks,
interconnect paths, and TLMM (GP... | {
"author": "Praveen Talari <praveen.talari@oss.qualcomm.com>",
"date": "Mon, 2 Feb 2026 23:39:22 +0530",
"thread_id": "20260202180922.1692428-4-praveen.talari@oss.qualcomm.com.mbox.gz"
} |
lkml | [PATCH v4 0/2] soundwire: amd: clock related changes | Refactor clock init sequence to support different bus clock frequencies
other than 12Mhz. Modify the bandwidth calculation logic to support 12Mhz,
6Mhz with different frame sizes.
Vijendar Mukunda (2):
soundwire: amd: add clock init control function
soundwire: amd: refactor bandwidth calculation logic
Changes sin... | Add generic SoundWire clock initialization sequence to support
different SoundWire bus clock frequencies for ACP6.3/7.0/7.1/7.2
platforms and remove hard coding initializations for 12Mhz bus
clock frequency.
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
---
drivers/soundwire/amd_manager.c | 52 ++++++++++... | {
"author": "Vijendar Mukunda <Vijendar.Mukunda@amd.com>",
"date": "Thu, 29 Jan 2026 11:44:11 +0530",
"thread_id": "20260129061517.38985-1-Vijendar.Mukunda@amd.com.mbox.gz"
} |
lkml | [PATCH v4 0/2] soundwire: amd: clock related changes | Refactor clock init sequence to support different bus clock frequencies
other than 12Mhz. Modify the bandwidth calculation logic to support 12Mhz,
6Mhz with different frame sizes.
Vijendar Mukunda (2):
soundwire: amd: add clock init control function
soundwire: amd: refactor bandwidth calculation logic
Changes sin... | For current platforms(ACP6.3/ACP7.0/ACP7.1/ACP7.2), AMD SoundWire manager
doesn't have banked registers for data port programming on Manager's side.
Need to use fixed block offsets, hstart & hstop for manager ports.
Earlier amd manager driver has support for 12MHz as a bus clock frequency
with frame size as 50 x 10 wit... | {
"author": "Vijendar Mukunda <Vijendar.Mukunda@amd.com>",
"date": "Thu, 29 Jan 2026 11:44:12 +0530",
"thread_id": "20260129061517.38985-1-Vijendar.Mukunda@amd.com.mbox.gz"
} |
lkml | [PATCH v4 0/2] soundwire: amd: clock related changes | Refactor clock init sequence to support different bus clock frequencies
other than 12Mhz. Modify the bandwidth calculation logic to support 12Mhz,
6Mhz with different frame sizes.
Vijendar Mukunda (2):
soundwire: amd: add clock init control function
soundwire: amd: refactor bandwidth calculation logic
Changes sin... | On 1/29/26 12:14 AM, Vijendar Mukunda wrote:
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org> | {
"author": "Mario Limonciello <superm1@kernel.org>",
"date": "Thu, 29 Jan 2026 13:34:01 -0600",
"thread_id": "20260129061517.38985-1-Vijendar.Mukunda@amd.com.mbox.gz"
} |
lkml | [PATCH v4 0/2] soundwire: amd: clock related changes | Refactor clock init sequence to support different bus clock frequencies
other than 12Mhz. Modify the bandwidth calculation logic to support 12Mhz,
6Mhz with different frame sizes.
Vijendar Mukunda (2):
soundwire: amd: add clock init control function
soundwire: amd: refactor bandwidth calculation logic
Changes sin... | On 1/29/26 07:14, Vijendar Mukunda wrote:
the two frame shapes don't carry the same number of bits (500 v. 250). There's probably an additional variable at play, maybe frame rate? Or is 50x10 for 12 MHz and 125x2 for 6 MHz? | {
"author": "Pierre-Louis Bossart <pierre-louis.bossart@linux.dev>",
"date": "Mon, 2 Feb 2026 18:05:33 +0100",
"thread_id": "20260129061517.38985-1-Vijendar.Mukunda@amd.com.mbox.gz"
} |
lkml | [PATCH v4 0/2] soundwire: amd: clock related changes | Refactor clock init sequence to support different bus clock frequencies
other than 12Mhz. Modify the bandwidth calculation logic to support 12Mhz,
6Mhz with different frame sizes.
Vijendar Mukunda (2):
soundwire: amd: add clock init control function
soundwire: amd: refactor bandwidth calculation logic
Changes sin... | On 02/02/26 22:35, Pierre-Louis Bossart wrote:
We need to support 12Mhz as bus clock frequency where frame rate is 48000
and number of bits is 500, frame shape as 50 x 10.
For 6Mhz bus clock frequency we need to support two different frame shapes
i.e number of bits as 250 with frame rate as 48000 and frame shape as
125... | {
"author": "\"Mukunda,Vijendar\" <vijendar.mukunda@amd.com>",
"date": "Mon, 2 Feb 2026 22:55:01 +0530",
"thread_id": "20260129061517.38985-1-Vijendar.Mukunda@amd.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | From: Mukesh Rathor <mrathor@linux.microsoft.com>
This file actually implements irq remapping, so rename to more appropriate
hyperv-irq.c. A new file named hyperv-iommu.c will be introduced later.
Also, move CONFIG_IRQ_REMAP out of the file and add to Makefile.
Signed-off-by: Mukesh Rathor <mrathor@linux.microsoft.co... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Mon, 19 Jan 2026 22:42:16 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Many PCI passthru related hypercalls require partition id of the target
guest. Guests are actually managed by MSHV driver and the partition id
is only maintained there. Add a field in the partition struct in MSHV
driver to save the tgid of the VMM process creating the ... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Mon, 19 Jan 2026 22:42:19 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Passthru exposes insufficient memory hypercall failure in the current map
device interrupt hypercall. In case of such a failure, we must deposit
more memory and redo the hypercall. Add support for that. Deposit memory
needs partition id, make that a parameter to the ma... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Mon, 19 Jan 2026 22:42:18 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Main change here is to rename hv_compose_msi_msg to
hv_vmbus_compose_msi_msg as we introduce hv_compose_msi_msg in upcoming
patches that builds MSI messages for both VMBus and non-VMBus cases. VMBus
is not used on baremetal root partition for example. While at it, repl... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Mon, 19 Jan 2026 22:42:23 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Add ioctl support for creating MSHV devices for a paritition. At
present only VFIO device types are supported, but more could be
added. At a high level, a partition ioctl to create device verifies
it is of type VFIO and does some setup for bridge code in mshv_vfio.c.
A... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Mon, 19 Jan 2026 22:42:22 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Add data structs needed by the subsequent patch that introduces a new
module to implement VFIO-MSHV pseudo device.
Signed-off-by: Mukesh Rathor <mrathor@linux.microsoft.com>
---
drivers/hv/mshv_root.h | 23 +++++++++++++++++++++++
include/uapi/linux/mshv.h | 31 ++... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Mon, 19 Jan 2026 22:42:20 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Make cosmetic changes:
o Rename struct pci_dev *dev to *pdev since there are cases of
struct device *dev in the file and all over the kernel
o Rename hv_build_pci_dev_id to hv_build_devid_type_pci in anticipation
of building different types of device ids
o Fix... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Mon, 19 Jan 2026 22:42:17 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Add a new file to implement VFIO-MSHV bridge pseudo device. These
functions are called in the VFIO framework, and credits to kvm/vfio.c
as this file was adapted from it.
Original author: Wei Liu <wei.liu@kernel.org>
(Slightly modified from the original version).
Sign... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Mon, 19 Jan 2026 22:42:21 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | From: Mukesh Rathor <mrathor@linux.microsoft.com>
As mentioned previously, a direct attached device must be referenced
via logical device id which is formed in the initial attach hypercall.
Interrupt mapping paths for direct attached devices are almost same,
except we must use logical device ids instead of the PCI dev... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Mon, 19 Jan 2026 22:42:28 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Upon guest access, in case of missing mmio mapping, the hypervisor
generates an unmapped gpa intercept. In this path, lookup the PCI
resource pfn for the guest gpa, and ask the hypervisor to map it
via hypercall. The PCI resource pfn is maintained by the VFIO driver,
a... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Mon, 19 Jan 2026 22:42:30 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | From: Mukesh Rathor <mrathor@linux.microsoft.com>
VFIO no longer puts the mmio pfn in vma->vm_pgoff. So, remove code
that is using it to map mmio space. It is broken and will cause
panic.
Signed-off-by: Mukesh Rathor <mrathor@linux.microsoft.com>
---
drivers/hv/mshv_root_main.c | 20 ++++----------------
1 file chan... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Mon, 19 Jan 2026 22:42:29 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Import/copy from Hyper-V public headers, definitions and declarations that
are related to attaching and detaching of device domains and interrupt
remapping, and building device ids for those purposes.
Signed-off-by: Mukesh Rathor <mrathor@linux.microsoft.com>
---
inc... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Mon, 19 Jan 2026 22:42:24 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | From: Mukesh Rathor <mrathor@linux.microsoft.com>
On Hyper-V, most hypercalls related to PCI passthru to map/unmap regions,
interrupts, etc need a device id as a parameter. This device id refers
to that specific device during the lifetime of passthru.
An L1VH VM only contains VMBus based devices. A device id for a VM... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Mon, 19 Jan 2026 22:42:25 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | From: Mukesh Rathor <mrathor@linux.microsoft.com>
On Hyper-V, most hypercalls related to PCI passthru to map/unmap regions,
interrupts, etc need a device id as a parameter. A device id refers
to a specific device. A device id is of two types:
o Logical: used for direct attach (see below) hypercalls. A logical
... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Mon, 19 Jan 2026 22:42:26 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Add a new file to implement management of device domains, mapping and
unmapping of iommu memory, and other iommu_ops to fit within the VFIO
framework for PCI passthru on Hyper-V running Linux as root or L1VH
parent. This also implements direct attach mechanism for PCI ... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Mon, 19 Jan 2026 22:42:27 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On Mon, Jan 19, 2026 at 10:42:21PM -0800, Mukesh R wrote:
There is a Linux standard for giving credits when code is adapted from.
This doesn't follow that standard. Please fix.
This put must be sync as device must be detached from domain before
attempting partition destruction.
This was explicitly mentioned in the p... | {
"author": "Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>",
"date": "Tue, 20 Jan 2026 08:09:02 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On Mon, Jan 19, 2026 at 10:42:22PM -0800, Mukesh R wrote:
Shouldn't the partition be put here?
Thanks,
Stanislav | {
"author": "Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>",
"date": "Tue, 20 Jan 2026 08:13:55 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | Hi Mukesh,
kernel test robot noticed the following build errors:
[auto build test ERROR on tip/x86/core]
[also build test ERROR on pci/next pci/for-linus arm64/for-next/core clk/clk-next soc/for-next linus/master arnd-asm-generic/master v6.19-rc6 next-20260119]
[If your patch is applied to the wrong git tree, kindly ... | {
"author": "kernel test robot <lkp@intel.com>",
"date": "Wed, 21 Jan 2026 03:08:24 +0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | Hi Mukesh,
kernel test robot noticed the following build warnings:
[auto build test WARNING on tip/x86/core]
[also build test WARNING on pci/next pci/for-linus arm64/for-next/core soc/for-next linus/master v6.19-rc6]
[cannot apply to clk/clk-next arnd-asm-generic/master next-20260119]
[If your patch is applied to the... | {
"author": "kernel test robot <lkp@intel.com>",
"date": "Wed, 21 Jan 2026 03:52:58 +0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | Hi Mukesh,
kernel test robot noticed the following build warnings:
[auto build test WARNING on tip/x86/core]
[also build test WARNING on pci/next pci/for-linus arm64/for-next/core clk/clk-next soc/for-next linus/master arnd-asm-generic/master v6.19-rc6 next-20260120]
[If your patch is applied to the wrong git tree, k... | {
"author": "kernel test robot <lkp@intel.com>",
"date": "Wed, 21 Jan 2026 05:09:48 +0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | Hi Mukesh,
On Mon, 19 Jan 2026 22:42:15 -0800
Mukesh R <mrathor@linux.microsoft.com> wrote:
I think some introduction/background to L1VH would help.
It may be clearer to state that the hypervisor supports Linux IOMMU
paging domains through map/unmap hypercalls, mapping GPAs to HPAs using
stage‑2 I/O page tables.
Th... | {
"author": "Jacob Pan <jacob.pan@linux.microsoft.com>",
"date": "Tue, 20 Jan 2026 13:50:32 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On Mon, Jan 19, 2026 at 10:42:24PM -0800, Mukesh R wrote:
<snip>
Shouldn't the inner struct be packed instead?
Why should the union be packed?
Thanks,
Stanislav | {
"author": "Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>",
"date": "Tue, 20 Jan 2026 14:17:24 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On Mon, Jan 19, 2026 at 10:42:25PM -0800, Mukesh R wrote:
Why not moving this static function definition above the called instead of
defining the prototype?
This variable is redundant.
It looks like this value always fits into 32 bit, so what is the value
in returning 64 bit?
Thanks,
Stanislav | {
"author": "Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>",
"date": "Tue, 20 Jan 2026 14:22:23 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On Mon, Jan 19, 2026 at 10:42:26PM -0800, Mukesh R wrote:
Should this one be renamed into hv_build_devid_type_vmbus() to align
with the other two function names?
Thanks,
Stanislav | {
"author": "Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>",
"date": "Tue, 20 Jan 2026 14:27:33 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On Mon, Jan 19, 2026 at 10:42:27PM -0800, Mukesh R wrote:
<snip>
The return above is never reached.
hvdom varaible is redundant.
Why goto here and not return NULL like above?
Shouldn't this be modified iff the detach succeeded?
There is some inconsistency in namings and behaviour of paired
functions:
1. The ... | {
"author": "Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>",
"date": "Tue, 20 Jan 2026 16:12:42 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On Mon, Jan 19, 2026 at 10:42:28PM -0800, Mukesh R wrote:
l1vh and root are mutually exclusive partitions.
If you wanted to highlight that it's l1vh itself and not its child guest, then
"l1vh parent" term would do.
Looks like the only special case is for attached logical devices,
otherwise hv_current_partition_id is... | {
"author": "Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>",
"date": "Tue, 20 Jan 2026 16:47:07 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | Hi Mukesh,
kernel test robot noticed the following build warnings:
[auto build test WARNING on tip/x86/core]
[also build test WARNING on pci/next pci/for-linus arm64/for-next/core clk/clk-next soc/for-next linus/master v6.19-rc6 next-20260120]
[cannot apply to arnd-asm-generic/master]
[If your patch is applied to the... | {
"author": "kernel test robot <lkp@intel.com>",
"date": "Wed, 21 Jan 2026 08:53:50 +0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On Mon, Jan 19, 2026 at 10:42:29PM -0800, Mukesh R wrote:
No need updating ret here: it's 0 after the previous call.
Thanks,
Stanislav | {
"author": "Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>",
"date": "Tue, 20 Jan 2026 17:41:39 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On Mon, Jan 19, 2026 at 10:42:30PM -0800, Mukesh R wrote:
Semaphore can't be taken under spinlock.
Get it instead.
Why this check is needed again?
The region type is stored on the region itself.
And the type is checked on the caller side.
This call needs to be protected by the spinlock.
Thanks,
Stanislav | {
"author": "Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>",
"date": "Tue, 20 Jan 2026 17:53:29 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | Hi Mukesh,
On Mon, 19 Jan 2026 22:42:27 -0800
Mukesh R <mrathor@linux.microsoft.com> wrote:
Given we are also developing a guest iommu driver on hyperv, I think it
is more clear to name them accordingly. Perhaps, hyperv-iommu-root.c?
Will this driver be x86 only?
DMA and IRQ remapping should be separate
I don't th... | {
"author": "Jacob Pan <jacob.pan@linux.microsoft.com>",
"date": "Wed, 21 Jan 2026 21:18:06 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On 1/19/2026 10:42 PM, Mukesh R wrote:
This should go inside the #if IS_ENABLED(CONFIG_MSHV_ROOT) section. | {
"author": "Nuno Das Neves <nunodasneves@linux.microsoft.com>",
"date": "Fri, 23 Jan 2026 10:23:04 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On 1/19/2026 10:42 PM, Mukesh R wrote:
With this commit, the IOCTL number is exposed to userspace but it doesn't work.
Ideally the IOCTL number should be added in the commit where it becomes usable. | {
"author": "Nuno Das Neves <nunodasneves@linux.microsoft.com>",
"date": "Fri, 23 Jan 2026 10:25:36 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On 1/19/2026 10:42 PM, Mukesh R wrote:
Since the code is very similar to Wei's original commit, the way I'd
recommend to do it is:
1. Change the commit author to Wei, using git commit --amend --author=
and
2. Put his signed-off line before yours:
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Signed-off-by: Mukesh Ratho... | {
"author": "Nuno Das Neves <nunodasneves@linux.microsoft.com>",
"date": "Fri, 23 Jan 2026 10:32:09 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On 1/19/2026 10:42 PM, Mukesh R wrote:
What is the reason for having this as a separate commit from patch 15?
It seems like removing this code and adding the mmio intercept
handling could be done in one patch. | {
"author": "Nuno Das Neves <nunodasneves@linux.microsoft.com>",
"date": "Fri, 23 Jan 2026 10:34:55 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On 1/23/26 10:25, Nuno Das Neves wrote:
Correct, I switched it because the next patch won't compile without it as
it needs the declarations here. It could be combined into one big patch,
but I think normally one would not expect full functionality until the
release is certified to be that feature compliant anyways. H... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Fri, 23 Jan 2026 16:36:28 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On 1/23/26 10:32, Nuno Das Neves wrote:
Perfect! Thank you, that is exactly the information I was trying to
seek... makes sense.
Thanks,
-Mukesh | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Fri, 23 Jan 2026 16:37:34 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On 1/20/26 14:17, Stanislav Kinsburskii wrote:
From GCC docs:
Specifying this attribute for struct and union types is equivalent to
specifying the packed attribute on each of the structure or union members.
Thanks,
-Mukesh | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Fri, 23 Jan 2026 16:38:56 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On 1/20/26 14:22, Stanislav Kinsburskii wrote:
Did you see the function implementation? It has other dependencies that
are later, it would need code reorg.
Thanks,
-Mukesh
Not really. It helps with debug by putting a quick print, and is
harmless.
The ABI has device id defined as 64bits where this is assigned.
T... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Fri, 23 Jan 2026 16:42:54 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On 1/20/26 14:27, Stanislav Kinsburskii wrote:
No, because hyperv only defines two types of device ids, and it would
unnecessary at to confusion. vmbus uses one the two types of device
ids. | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Fri, 23 Jan 2026 16:44:01 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On 1/20/26 16:12, Stanislav Kinsburskii wrote:
Some debug code there got removed. Will fix in next version.
We want to still free the domain and not let it get stuck. The purpose
is more to make sure detach was called before domain free.
The pair of hv_iommu_unmap_pages is hv_iommu_map_pages right above.
hv_iommu_... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Fri, 23 Jan 2026 17:26:19 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On 1/21/26 21:18, Jacob Pan wrote:
well, l1vh is not quite root, more like a parent. But we've been using
l1vh root loosely to mean l1vh parent. so probably ok to rename it
to hyperv-iommu-root.c. I prefer not calling it parent or something
like that.
j
Yes for now.
not sure i follow.
Well, it is getting the inf... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Fri, 23 Jan 2026 18:01:29 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On 1/20/26 16:47, Stanislav Kinsburskii wrote:
We've been loosely using "l1vh root" to mean "privilated l1vh" as opposed
to l1vh guests. I think that is fine. l1vh parent is confusing, as it may
also refer to l1vh parent, which would be the host. so as long as the
context is clear, we are ok.
Could be, but at the co... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Fri, 23 Jan 2026 18:08:49 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On 1/23/26 10:34, Nuno Das Neves wrote:
Just ease of review and porting patches from this branch to that
branch to that release to this release... I am sure someone would
have asked for this to be a separate patch :).
Thanks,
-Mukesh | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Fri, 23 Jan 2026 18:12:14 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On 1/20/26 17:53, Stanislav Kinsburskii wrote:
Yeah, something didn't feel right here and I meant to recheck, now regret
rushing to submit the patch.
Rethinking, I think the pt_mem_regions_lock is not needed to protect
the uaddr because unmap will properly serialize via the mm lock.
To make sure region did not cha... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Fri, 23 Jan 2026 18:19:15 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On 1/20/26 13:50, Jacob Pan wrote:
Ok, i can add something, but l1vh was very well introduced if you
search the mshv commits for "l1vh".
sure.
Yeah, I was hoping we can get by for now without it. At least in case of
the cloud hypervisor, entire guest ram is mapped anyways. We can document
it and work on enhancemen... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Fri, 23 Jan 2026 18:27:34 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On Fri, Jan 23, 2026 at 05:26:19PM -0800, Mukesh R wrote:
<snip>
How can one debug subseqent errors if num_attchd is decremented
unconditionally? In reality the device is left attached, but the related
kernel metadata is gone.
Hv_iommu_map_pages is a wrapper around hv_iommu_map_pgs while
hv_iommu_unmap_pages is a ... | {
"author": "Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>",
"date": "Mon, 26 Jan 2026 07:57:35 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On Fri, Jan 23, 2026 at 06:19:15PM -0800, Mukesh R wrote:
How can this happen? One can't change VMA type without unmapping it
first. And unmapping it leads to a kernel MMIO region state dangling
around without corresponding user space mapping.
This is similar to dangling pinned regions and should likely be
addressed... | {
"author": "Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>",
"date": "Mon, 26 Jan 2026 10:15:53 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On Fri, Jan 23, 2026 at 04:42:54PM -0800, Mukesh R wrote:
Why not placing the caller side after the function definition then?
Thanks,
Stanislav | {
"author": "Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>",
"date": "Mon, 26 Jan 2026 12:50:03 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On 1/26/26 07:57, Stanislav Kinsburskii wrote:
Error is printed in case of failed detach. If there is panic, at least
you can get some info about the device. Metadata in hypervisor is
around if failed.
Unmap does not need intermediate function.
We print error upon its failure in hv_iommu_map_pages():
... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Mon, 26 Jan 2026 19:02:29 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On 1/26/26 10:15, Stanislav Kinsburskii wrote:
Right, and vm_flags would not be mmio expected then.
I don't think we need that. Either it succeeds if the region did not
change at all, or just fails.
I am not sure why? This check is done by a vcpu thread, so regions
will not have just gone away.
Thanks,
-Mukesh | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Mon, 26 Jan 2026 19:07:22 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On Mon, Jan 26, 2026 at 07:02:29PM -0800, Mukesh R wrote:
With this approach the only thing left is a kernel message.
But if the state is kept intact, one could collect a kernel core and
analyze it.
And note, that there won't be a hypervisor core by default: our main
context with the usptreamed version of the driver ... | {
"author": "Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>",
"date": "Tue, 27 Jan 2026 10:46:49 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On Mon, Jan 26, 2026 at 07:07:22PM -0800, Mukesh R wrote:
I'm afraid we do, as if the driver mapped a page with the previous
memory region, and then the region is unmapped, the page will stay
mapped in the hypervisor, but will be considered free by kernel, which
in turn will lead to GPF upn next allocation.
With pinn... | {
"author": "Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>",
"date": "Tue, 27 Jan 2026 10:57:08 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | Hi Mukesh,
On Fri, 23 Jan 2026 18:01:29 -0800
Mukesh R <mrathor@linux.microsoft.com> wrote:
yeah, something specific and different than the guest driver will do.
If there is nothing x86 specific in this driver (assuming the
hypercalls here are not x86 only), maybe you can move to the generic
startup code.
In IOMMU ... | {
"author": "Jacob Pan <jacob.pan@linux.microsoft.com>",
"date": "Tue, 27 Jan 2026 11:21:44 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | Hi Mukesh,
On second thought, if the hv_no_attdev knob is only meant to control
host domain attach vs. direct attach, then it is irrelevant on L1VH.
Would it make more sense to rename this to something like
hv_host_disable_direct_attach? That would better reflect its scope and
allow it to be ignored under L1VH, and r... | {
"author": "Jacob Pan <jacob.pan@linux.microsoft.com>",
"date": "Tue, 27 Jan 2026 14:31:19 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On Mon, Jan 19, 2026 at 10:42:23PM -0800, Mukesh R wrote:
Don't mix up cleanup changes. Do it in a separate patch.
- Mani
--
மணிவண்ணன் சதாசிவம் | {
"author": "Manivannan Sadhasivam <mani@kernel.org>",
"date": "Wed, 28 Jan 2026 19:33:57 +0530",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On Fri, Jan 23, 2026 at 04:42:54PM -0800, Mukesh R wrote:
Such debug print do not exist now. So there is no need of a variable, drop it.
- Mani
--
மணிவண்ணன் சதாசிவம் | {
"author": "Manivannan Sadhasivam <mani@kernel.org>",
"date": "Wed, 28 Jan 2026 20:06:21 +0530",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On 1/27/26 14:31, Jacob Pan wrote:
It would, but it is kernel parameter and needs to be terse. It would
be documented properly tho, so we should be ok.
Thanks,
-Mukesh | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Fri, 30 Jan 2026 14:10:57 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On 1/27/26 10:57, Stanislav Kinsburskii wrote:
There are no ram pages for mmio regions. Also, we don't do much with
mmio regions other than tell the hyp about it.
Thanks,
-Mukesh | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Fri, 30 Jan 2026 14:17:24 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
lkml | [PATCH v0 00/15] PCI passthru on Hyper-V (Part I) | From: Mukesh Rathor <mrathor@linux.microsoft.com>
Implement passthru of PCI devices to unprivileged virtual machines
(VMs) when Linux is running as a privileged VM on Microsoft Hyper-V
hypervisor. This support is made to fit within the workings of VFIO
framework, and any VMM needing to use it must use the VFIO subsyst... | On 1/27/26 10:46, Stanislav Kinsburskii wrote:
Again, most of linux stuff is cleaned up, the only state is in
hypervisor, and hypervisor can totally protect itself and devices.
So there is not much in kernel core as it got cleaned up already.
Think of this as additional check, we can remove in future after
it stands t... | {
"author": "Mukesh R <mrathor@linux.microsoft.com>",
"date": "Fri, 30 Jan 2026 14:51:19 -0800",
"thread_id": "20260120064230.3602565-1-mrathor@linux.microsoft.com.mbox.gz"
} |
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