Re: [RFC 0/8] arm64/hw_breakpoint: Enable FEAT_Debugv8p9

[Anshuman Khandual]

On 4/5/24 13:30, Anshuman Khandual wrote:
> This series enables FEAT_Debugv8p9 thus extending breakpoint and watchpoint
> support upto 64. This has been lightly tested and still work is in progress
> but would like to get some early feedback on the approach.
> 
> Possible impact of context switches while tracing kernel addresses needs to
> be evaluated regarding MDSELR_EL1 access. This series is based on v6.9-rc2.
> 
> Cc: Jonathan Corbet <corbet@xxxxxxx>
> Cc: Marc Zyngier <maz@xxxxxxxxxx>
> Cc: Oliver Upton <oliver.upton@xxxxxxxxx>
> Cc: James Morse <james.morse@xxxxxxx>
> Cc: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
> Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
> Cc: Will Deacon <will@xxxxxxxxxx>
> Cc: Mark Brown <broonie@xxxxxxxxxx>
> Cc: Mark Rutland <mark.rutland@xxxxxxx>
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> Cc: kvmarm@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> 
> Anshuman Khandual (8):
>   arm64/sysreg: Add register fields for MDSELR_EL1
>   arm64/sysreg: Add register fields for HDFGRTR2_EL2
>   arm64/sysreg: Add register fields for HDFGWTR2_EL2
>   arm64/sysreg: Update ID_AA64MMFR0_EL1 register

Since the above patches add and update register definitions related to
HW breakpoints, and have already been reviewed by Mark, will send them
independently.