| Message ID | 20240420151741.962500-17-atishp@rivosinc.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | RISC-V SBI v2.0 PMU improvements and Perf sampling in KVM guest | expand |
On Sat, Apr 20, 2024 at 5:18 AM Atish Patra <atishp@rivosinc.com> wrote: > > Rename the function to indicate that it is meant for firmware > counter read. While at it, add a range sanity check for it as > well. > > Reviewed-by: Andrew Jones <ajones@ventanamicro.com> > Signed-off-by: Atish Patra <atishp@rivosinc.com> LGTM. Reviewed-by: Anup Patel <anup@brainfault.org> Regards, Anup > --- > arch/riscv/include/asm/kvm_vcpu_pmu.h | 2 +- > arch/riscv/kvm/vcpu_pmu.c | 7 ++++++- > arch/riscv/kvm/vcpu_sbi_pmu.c | 2 +- > 3 files changed, 8 insertions(+), 3 deletions(-) > > diff --git a/arch/riscv/include/asm/kvm_vcpu_pmu.h b/arch/riscv/include/asm/kvm_vcpu_pmu.h > index 55861b5d3382..fa0f535bbbf0 100644 > --- a/arch/riscv/include/asm/kvm_vcpu_pmu.h > +++ b/arch/riscv/include/asm/kvm_vcpu_pmu.h > @@ -89,7 +89,7 @@ int kvm_riscv_vcpu_pmu_ctr_cfg_match(struct kvm_vcpu *vcpu, unsigned long ctr_ba > unsigned long ctr_mask, unsigned long flags, > unsigned long eidx, u64 evtdata, > struct kvm_vcpu_sbi_return *retdata); > -int kvm_riscv_vcpu_pmu_ctr_read(struct kvm_vcpu *vcpu, unsigned long cidx, > +int kvm_riscv_vcpu_pmu_fw_ctr_read(struct kvm_vcpu *vcpu, unsigned long cidx, > struct kvm_vcpu_sbi_return *retdata); > int kvm_riscv_vcpu_pmu_fw_ctr_read_hi(struct kvm_vcpu *vcpu, unsigned long cidx, > struct kvm_vcpu_sbi_return *retdata); > diff --git a/arch/riscv/kvm/vcpu_pmu.c b/arch/riscv/kvm/vcpu_pmu.c > index e1409ec9afc0..04db1f993c47 100644 > --- a/arch/riscv/kvm/vcpu_pmu.c > +++ b/arch/riscv/kvm/vcpu_pmu.c > @@ -235,6 +235,11 @@ static int pmu_ctr_read(struct kvm_vcpu *vcpu, unsigned long cidx, > u64 enabled, running; > int fevent_code; > > + if (cidx >= kvm_pmu_num_counters(kvpmu) || cidx == 1) { > + pr_warn("Invalid counter id [%ld] during read\n", cidx); > + return -EINVAL; > + } > + > pmc = &kvpmu->pmc[cidx]; > > if (pmc->cinfo.type == SBI_PMU_CTR_TYPE_FW) { > @@ -747,7 +752,7 @@ int kvm_riscv_vcpu_pmu_fw_ctr_read_hi(struct kvm_vcpu *vcpu, unsigned long cidx, > return 0; > } > > -int kvm_riscv_vcpu_pmu_ctr_read(struct kvm_vcpu *vcpu, unsigned long cidx, > +int kvm_riscv_vcpu_pmu_fw_ctr_read(struct kvm_vcpu *vcpu, unsigned long cidx, > struct kvm_vcpu_sbi_return *retdata) > { > int ret; > diff --git a/arch/riscv/kvm/vcpu_sbi_pmu.c b/arch/riscv/kvm/vcpu_sbi_pmu.c > index cf111de51bdb..e4be34e03e83 100644 > --- a/arch/riscv/kvm/vcpu_sbi_pmu.c > +++ b/arch/riscv/kvm/vcpu_sbi_pmu.c > @@ -62,7 +62,7 @@ static int kvm_sbi_ext_pmu_handler(struct kvm_vcpu *vcpu, struct kvm_run *run, > ret = kvm_riscv_vcpu_pmu_ctr_stop(vcpu, cp->a0, cp->a1, cp->a2, retdata); > break; > case SBI_EXT_PMU_COUNTER_FW_READ: > - ret = kvm_riscv_vcpu_pmu_ctr_read(vcpu, cp->a0, retdata); > + ret = kvm_riscv_vcpu_pmu_fw_ctr_read(vcpu, cp->a0, retdata); > break; > case SBI_EXT_PMU_COUNTER_FW_READ_HI: > if (IS_ENABLED(CONFIG_32BIT)) > -- > 2.34.1 >
diff --git a/arch/riscv/include/asm/kvm_vcpu_pmu.h b/arch/riscv/include/asm/kvm_vcpu_pmu.h index 55861b5d3382..fa0f535bbbf0 100644 --- a/arch/riscv/include/asm/kvm_vcpu_pmu.h +++ b/arch/riscv/include/asm/kvm_vcpu_pmu.h @@ -89,7 +89,7 @@ int kvm_riscv_vcpu_pmu_ctr_cfg_match(struct kvm_vcpu *vcpu, unsigned long ctr_ba unsigned long ctr_mask, unsigned long flags, unsigned long eidx, u64 evtdata, struct kvm_vcpu_sbi_return *retdata); -int kvm_riscv_vcpu_pmu_ctr_read(struct kvm_vcpu *vcpu, unsigned long cidx, +int kvm_riscv_vcpu_pmu_fw_ctr_read(struct kvm_vcpu *vcpu, unsigned long cidx, struct kvm_vcpu_sbi_return *retdata); int kvm_riscv_vcpu_pmu_fw_ctr_read_hi(struct kvm_vcpu *vcpu, unsigned long cidx, struct kvm_vcpu_sbi_return *retdata); diff --git a/arch/riscv/kvm/vcpu_pmu.c b/arch/riscv/kvm/vcpu_pmu.c index e1409ec9afc0..04db1f993c47 100644 --- a/arch/riscv/kvm/vcpu_pmu.c +++ b/arch/riscv/kvm/vcpu_pmu.c @@ -235,6 +235,11 @@ static int pmu_ctr_read(struct kvm_vcpu *vcpu, unsigned long cidx, u64 enabled, running; int fevent_code; + if (cidx >= kvm_pmu_num_counters(kvpmu) || cidx == 1) { + pr_warn("Invalid counter id [%ld] during read\n", cidx); + return -EINVAL; + } + pmc = &kvpmu->pmc[cidx]; if (pmc->cinfo.type == SBI_PMU_CTR_TYPE_FW) { @@ -747,7 +752,7 @@ int kvm_riscv_vcpu_pmu_fw_ctr_read_hi(struct kvm_vcpu *vcpu, unsigned long cidx, return 0; } -int kvm_riscv_vcpu_pmu_ctr_read(struct kvm_vcpu *vcpu, unsigned long cidx, +int kvm_riscv_vcpu_pmu_fw_ctr_read(struct kvm_vcpu *vcpu, unsigned long cidx, struct kvm_vcpu_sbi_return *retdata) { int ret; diff --git a/arch/riscv/kvm/vcpu_sbi_pmu.c b/arch/riscv/kvm/vcpu_sbi_pmu.c index cf111de51bdb..e4be34e03e83 100644 --- a/arch/riscv/kvm/vcpu_sbi_pmu.c +++ b/arch/riscv/kvm/vcpu_sbi_pmu.c @@ -62,7 +62,7 @@ static int kvm_sbi_ext_pmu_handler(struct kvm_vcpu *vcpu, struct kvm_run *run, ret = kvm_riscv_vcpu_pmu_ctr_stop(vcpu, cp->a0, cp->a1, cp->a2, retdata); break; case SBI_EXT_PMU_COUNTER_FW_READ: - ret = kvm_riscv_vcpu_pmu_ctr_read(vcpu, cp->a0, retdata); + ret = kvm_riscv_vcpu_pmu_fw_ctr_read(vcpu, cp->a0, retdata); break; case SBI_EXT_PMU_COUNTER_FW_READ_HI: if (IS_ENABLED(CONFIG_32BIT))