From: Atish Patra Date: Mon, 3 Mar 2025 22:53:06 +0000 (-0800) Subject: RISC-V: KVM: Disable the kernel perf counter during configure X-Git-Tag: v6.15-rc1~195^2~3^2~5 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bbb622488749478955485765ddff9d56be4a7e4b;p=thirdparty%2Flinux.git RISC-V: KVM: Disable the kernel perf counter during configure 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 Signed-off-by: Atish Patra Link: https://lore.kernel.org/r/20250303-kvm_pmu_improve-v2-1-41d177e45929@rivosinc.com Signed-off-by: Anup Patel --- diff --git a/arch/riscv/kvm/vcpu_pmu.c b/arch/riscv/kvm/vcpu_pmu.c index 2707a51b082ca..78ac3216a54dd 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.