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| author | Anup Patel <apatel@ventanamicro.com> | 2022-04-28 18:31:57 +0530 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2022-05-07 10:04:54 +0530 |
| commit | d4b563c881d6bca15bd0c4123c245c875a80ffe6 (patch) | |
| tree | e0966637e8bdf08f5f30a0611fd83214f11cd3bc /lib/sbi/sbi_hart.c | |
| parent | 5b8b377178df56ee6bca2cf31b7580ca07cb7d70 (diff) | |
| download | opensbi-d4b563c881d6bca15bd0c4123c245c875a80ffe6.zip opensbi-d4b563c881d6bca15bd0c4123c245c875a80ffe6.tar.gz opensbi-d4b563c881d6bca15bd0c4123c245c875a80ffe6.tar.bz2 | |
lib: sbi: Remove MCOUNTEREN and SCOUNTEREN hart features
If a hart implements privileged spec v1.10 (or higher) then we can
safely assume that [m|s]counteren CSR are present and we don't need
MCOUNTEREN and SCOUNTEREN as hart features.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Diffstat (limited to 'lib/sbi/sbi_hart.c')
| -rw-r--r-- | lib/sbi/sbi_hart.c | 29 |
1 files changed, 5 insertions, 24 deletions
diff --git a/lib/sbi/sbi_hart.c b/lib/sbi/sbi_hart.c index ed4e631..ed8a061 100644 --- a/lib/sbi/sbi_hart.c +++ b/lib/sbi/sbi_hart.c @@ -58,7 +58,7 @@ static void mstatus_init(struct sbi_scratch *scratch) /* Disable user mode usage of all perf counters except default ones (CY, TM, IR) */ if (misa_extension('S') && - sbi_hart_has_feature(scratch, SBI_HART_HAS_SCOUNTEREN)) + sbi_hart_priv_version(scratch) >= SBI_HART_PRIV_VER_1_10) csr_write(CSR_SCOUNTEREN, 7); /** @@ -66,7 +66,7 @@ static void mstatus_init(struct sbi_scratch *scratch) * Supervisor mode usage for all counters are enabled by default * But counters will not run until mcountinhibit is set. */ - if (sbi_hart_has_feature(scratch, SBI_HART_HAS_MCOUNTEREN)) + if (sbi_hart_priv_version(scratch) >= SBI_HART_PRIV_VER_1_10) csr_write(CSR_MCOUNTEREN, -1); /* All programmable counters will start running at runtime after S-mode request */ @@ -402,12 +402,6 @@ static inline char *sbi_hart_feature_id2string(unsigned long feature) return NULL; switch (feature) { - case SBI_HART_HAS_SCOUNTEREN: - fstr = "scounteren"; - break; - case SBI_HART_HAS_MCOUNTEREN: - fstr = "mcounteren"; - break; case SBI_HART_HAS_MCOUNTINHIBIT: fstr = "mcountinhibit"; break; @@ -614,23 +608,10 @@ __mhpm_skip: #undef __check_csr_2 #undef __check_csr - /* Detect if hart supports SCOUNTEREN feature */ - val = csr_read_allowed(CSR_SCOUNTEREN, (unsigned long)&trap); - if (!trap.cause) { - hfeatures->priv_version = SBI_HART_PRIV_VER_1_10; - csr_write_allowed(CSR_SCOUNTEREN, (unsigned long)&trap, val); - if (!trap.cause) - hfeatures->features |= SBI_HART_HAS_SCOUNTEREN; - } - - /* Detect if hart supports MCOUNTEREN feature */ + /* Detect if hart supports Priv v1.10 */ val = csr_read_allowed(CSR_MCOUNTEREN, (unsigned long)&trap); - if (!trap.cause) { + if (!trap.cause) hfeatures->priv_version = SBI_HART_PRIV_VER_1_10; - csr_write_allowed(CSR_MCOUNTEREN, (unsigned long)&trap, val); - if (!trap.cause) - hfeatures->features |= SBI_HART_HAS_MCOUNTEREN; - } /* Detect if hart supports MCOUNTINHIBIT feature */ val = csr_read_allowed(CSR_MCOUNTINHIBIT, (unsigned long)&trap); @@ -651,7 +632,7 @@ __mhpm_skip: /* Counter overflow/filtering is not useful without mcounter/inhibit */ if (hfeatures->features & SBI_HART_HAS_MCOUNTINHIBIT && - hfeatures->features & SBI_HART_HAS_MCOUNTEREN) { + hfeatures->priv_version >= SBI_HART_PRIV_VER_1_12) { /* Detect if hart supports sscofpmf */ csr_read_allowed(CSR_SCOUNTOVF, (unsigned long)&trap); if (!trap.cause) |