Raspberry Pi support for AXI bus events in Linux perf tool - #7671
Open
captain5050 wants to merge 3 commits into
Open
captain5050 wants to merge 3 commits into
captain5050 wants to merge 3 commits into
Conversation
Add device tree bindings for the Broadcom Raspberry Pi AXI PMU block found on BCM2835, BCM2711, and BCM2712 SoCs. Depending on the SoC and security configuration, these PMUs support either direct MMIO access for the System monitor or routing via the Raspberry Pi firmware mailbox IPC for the VideoCore VPU monitor. Signed-off-by: Ian Rogers <irogers@google.com>
Add a PMU driver for the Raspberry Pi AXI performance monitors. It provides access to the System and VideoCore performance counters on Broadcom BCM2835 and BCM2711 platforms natively through the perf subsystem. The driver implements bus-watcher refcounting, group validation, CPU hotplug migration, and sysfs event aliases mapping hardware-specific events to AXI pipelines (such as DMA, V3D, HVS, and ISP). Memory-mapped endpoints for the primary System bus are read synchronously, while the VideoCore VPU monitor is polled asynchronously in process context via the Raspberry Pi firmware mailbox interface. Signed-off-by: Ian Rogers <irogers@google.com>
Extend the Raspberry Pi AXI PMU driver to support the Broadcom BCM2712 architecture used in the Raspberry Pi 5. The BCM2712 SoC drops the legacy VideoCore VPU monitor and exposes a unified System monitor via MMIO mapping distinctly different hardware pipelines (such as DISPLAY_TOP, ARGON_TOP, BSTM_TOP, PCIE_01, and XPT) and expanded 6-bit AXI master ID filter tables. Signed-off-by: Ian Rogers <irogers@google.com>
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
I've addressed review feedback from:
#7571
but in doing so accidentally closed the PR. Apologies, hopefully things are in a better state this time.