On Wed, Feb 26, 2025 at 12:25:03PM -0800, Atish Patra wrote:
> The perf event should be marked disabled during the creation as
> it is not ready to be scheduled until there is SBI PMU start call
> or config matching is called with auto start. Otherwise, event add/start
> gets called during perf_event_create_kernel_counter function.
> It will be enabled and scheduled to run via perf_event_enable during
> either the above mentioned scenario.
>
> Fixes: 0cb74b65d2e5 ("RISC-V: KVM: Implement perf support without sampling")
>
> Signed-off-by: Atish Patra <ati...@rivosinc.com>
> ---
> arch/riscv/kvm/vcpu_pmu.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/riscv/kvm/vcpu_pmu.c b/arch/riscv/kvm/vcpu_pmu.c
> index 2707a51b082c..78ac3216a54d 100644
> --- a/arch/riscv/kvm/vcpu_pmu.c
> +++ b/arch/riscv/kvm/vcpu_pmu.c
> @@ -666,6 +666,7 @@ int kvm_riscv_vcpu_pmu_ctr_cfg_match(struct kvm_vcpu
> *vcpu, unsigned long ctr_ba
> .type = etype,
> .size = sizeof(struct perf_event_attr),
> .pinned = true,
> + .disabled = true,
> /*
> * It should never reach here if the platform doesn't support
> the sscofpmf
> * extension as mode filtering won't work without it.
>
> --
> 2.43.0
>
Reviewed-by: Andrew Jones <ajo...@ventanamicro.com>
