6.6-stable review patch. If anyone has any objections, please let me know.
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From: Atish Patra atishp@rivosinc.com
[ Upstream commit bbb622488749478955485765ddff9d56be4a7e4b ]
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")
Reviewed-by: Andrew Jones ajones@ventanamicro.com Signed-off-by: Atish Patra atishp@rivosinc.com Link: https://lore.kernel.org/r/20250303-kvm_pmu_improve-v2-1-41d177e45929@rivosin... Signed-off-by: Anup Patel anup@brainfault.org Signed-off-by: Sasha Levin sashal@kernel.org --- 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 cee1b9ca4ec48..e2e2a115afb5c 100644 --- a/arch/riscv/kvm/vcpu_pmu.c +++ b/arch/riscv/kvm/vcpu_pmu.c @@ -468,6 +468,7 @@ 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.