diff options
Diffstat (limited to 'target/riscv/csr.c')
-rw-r--r-- | target/riscv/csr.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/target/riscv/csr.c b/target/riscv/csr.c index 448162e484..de67741f36 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -56,17 +56,24 @@ static int fs(CPURISCVState *env, int csrno) static int ctr(CPURISCVState *env, int csrno) { #if !defined(CONFIG_USER_ONLY) + CPUState *cs = env_cpu(env); + RISCVCPU *cpu = RISCV_CPU(cs); + uint32_t ctr_en = ~0u; + + if (!cpu->cfg.ext_counters) { + /* The Counters extensions is not enabled */ + return -1; + } + /* - * The counters are always enabled on newer priv specs, as the CSR has - * changed from controlling that the counters can be read to controlling - * that the counters increment. + * The counters are always enabled at run time on newer priv specs, as the + * CSR has changed from controlling that the counters can be read to + * controlling that the counters increment. */ if (env->priv_ver > PRIV_VERSION_1_09_1) { return 0; } - uint32_t ctr_en = ~0u; - if (env->priv < PRV_M) { ctr_en &= env->mcounteren; } |