Re: [PATCH v3 00/17] KVM: arm64: nv: Support for EL2 PMU controls

[Anshuman Khandual <anshuman.khandual@arm.com>]

On 10/7/24 23:15, Oliver Upton wrote:
> Marc, I stole patch 1 from you for the sake of sending out a consistent
> series. I can sort things out when I apply patches if that patch is a
> common base for the both of us.
> 
> v2 -> v3:
>  - Use the sysreg sanitisation infrastructure to apply RES0/RES1 masks
>    to MDCR_EL2
>  - Drop trap_config bit describing if a trap applies to Host EL0
>  - Honor MDCR_EL2.{HPME,HLP} for the 'hypervisor range' of PMU counters
> 
> v2: https://lore.kernel.org/kvmarm/20240827002235.1753237-1-oliver.upton@linux.dev/#r
> 
> Marc Zyngier (1):
>   KVM: arm64: Extend masking facility to arbitrary registers
> 
> Oliver Upton (16):
>   arm64: sysreg: Migrate MDCR_EL2 definition to table
>   arm64: sysreg: Add missing definitions for ID_AA64DFR0_EL1
>   KVM: arm64: Describe RES0/RES1 bits of MDCR_EL2
>   KVM: arm64: nv: Allow coarse-grained trap combos to use complex traps
>   KVM: arm64: nv: Rename BEHAVE_FORWARD_ANY
>   KVM: arm64: nv: Reinject traps that take effect in Host EL0
>   KVM: arm64: nv: Honor MDCR_EL2.{TPM, TPMCR} in Host EL0
>   KVM: arm64: nv: Describe trap behaviour of MDCR_EL2.HPMN
>   KVM: arm64: nv: Advertise support for FEAT_HPMN0
>   KVM: arm64: Rename kvm_pmu_valid_counter_mask()
>   KVM: arm64: nv: Adjust range of accessible PMCs according to HPMN
>   KVM: arm64: Add helpers to determine if PMC counts at a given EL
>   KVM: arm64: nv: Honor MDCR_EL2.HPME
>   KVM: arm64: nv: Honor MDCR_EL2.HLP
>   KVM: arm64: nv: Apply EL2 event filtering when in hyp context
>   KVM: arm64: nv: Reprogram PMU events affected by nested transition
> 
>  arch/arm64/include/asm/kvm_arm.h     |  29 ---
>  arch/arm64/include/asm/kvm_emulate.h |   5 +
>  arch/arm64/include/asm/kvm_host.h    |  21 +-
>  arch/arm64/kvm/emulate-nested.c      | 298 ++++++++++++++++-----------
>  arch/arm64/kvm/nested.c              |  52 ++++-
>  arch/arm64/kvm/pmu-emul.c            | 136 ++++++++++--
>  arch/arm64/kvm/sys_regs.c            |  15 +-
>  arch/arm64/tools/sysreg              |  45 +++-
>  include/kvm/arm_pmu.h                |  18 +-
>  9 files changed, 432 insertions(+), 187 deletions(-)
> 
> 
> base-commit: 9852d85ec9d492ebef56dc5f229416c925758edc

Hello Marc/Oliver,

I am planning to rebase the KVM FEAT_FGT2 series [1] on this one after accommodating
the following changes and respin.

- Latest changes to spec (https://developer.arm.com/documentation/ddi0601/2024-09/)
- Adding nDCCIVAPS and TSBCSYNC handling in HFGITR2_EL2 registers
- Integrating SYS_PMEVCNTSVR_EL1(N) handling in check_mdcr_hpmn() (proposed here)

OR should I just wait for this series to be merged mainline first. Please do suggest.
Thank you.

- Anshuman

[1] https://lore.kernel.org/all/20241001024356.1096072-1-anshuman.khandual@arm.com/