Re: [PATCH v2 00/12] arm64: Add support for Armv9.4 PMU fixed instruction counter
From: Will Deacon <will@kernel.org>
Date: 2024-07-10 12:36:28
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kvmarm, linux-perf-users, lkml
On Wed, Jul 03, 2024 at 03:38:44PM +0100, Will Deacon wrote:
On Wed, 26 Jun 2024 16:32:24 -0600, Rob Herring (Arm) wrote:quoted
This series adds support for the optional fixed instruction counter added in Armv9.4 PMU. Most of the series is a refactoring to remove the index to counter number conversion which dates back to the Armv7 PMU driver. Removing it is necessary in order to support more than 32 counters without a bunch of conditional code further complicating the conversion. [...]Applied to will (for-next/perf), thanks! [01/12] perf: arm_pmuv3: Avoid assigning fixed cycle counter with threshold https://git.kernel.org/will/c/81e15ca3e523 [02/12] perf: arm_pmuv3: Drop unnecessary IS_ENABLED(CONFIG_ARM64) check https://git.kernel.org/will/c/598c1a2d9f4b [03/12] perf/arm: Move 32-bit PMU drivers to drivers/perf/ https://git.kernel.org/will/c/8d75537bebfa [04/12] perf: arm_v6/7_pmu: Drop non-DT probe support https://git.kernel.org/will/c/12f051c987dc [05/12] perf: arm_pmuv3: Include asm/arm_pmuv3.h from linux/perf/arm_pmuv3.h https://git.kernel.org/will/c/d688ffa26942
I've had an off-list report that this series causes a kernel crash under KVM unit tests (panic in write_pmevtypern()). Given that I don't have enough information to repro/debug and Catalin is tagging the arm64 branch for 6.11 today, I've dropped patches 6-12 for now. Please can you send a fixed version after the merge window? Cheers, Will