diff options
| -rw-r--r-- | lib/sbi/sbi_fwft.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/lib/sbi/sbi_fwft.c b/lib/sbi/sbi_fwft.c index c5803300..124a043a 100644 --- a/lib/sbi/sbi_fwft.c +++ b/lib/sbi/sbi_fwft.c @@ -146,6 +146,68 @@ static int fwft_get_adue(struct fwft_config *conf, unsigned long *value) return SBI_OK; } +static int fwft_lpad_supported(struct fwft_config *conf) +{ + if (!sbi_hart_has_extension(sbi_scratch_thishart_ptr(), + SBI_HART_EXT_ZICFILP)) + return SBI_ENOTSUPP; + + return SBI_OK; +} + +static int fwft_enable_lpad(struct fwft_config *conf, unsigned long value) +{ + if (value == 1) + csr_set(CSR_MENVCFG, ENVCFG_LPE); + else if (value == 0) + csr_clear(CSR_MENVCFG, ENVCFG_LPE); + else + return SBI_EINVAL; + + return SBI_OK; +} + +static int fwft_get_lpad(struct fwft_config *conf, unsigned long *value) +{ + unsigned long cfg; + + cfg = csr_read(CSR_MENVCFG) & ENVCFG_LPE; + *value = cfg != 0; + + return SBI_OK; +} + +static int fwft_sstack_supported(struct fwft_config *conf) +{ + if (!sbi_hart_has_extension(sbi_scratch_thishart_ptr(), + SBI_HART_EXT_ZICFISS)) + return SBI_ENOTSUPP; + + return SBI_OK; +} + +static int fwft_enable_sstack(struct fwft_config *conf, unsigned long value) +{ + if (value == 1) + csr_set(CSR_MENVCFG, ENVCFG_SSE); + else if (value == 0) + csr_clear(CSR_MENVCFG, ENVCFG_SSE); + else + return SBI_EINVAL; + + return SBI_OK; +} + +static int fwft_get_sstack(struct fwft_config *conf, unsigned long *value) +{ + unsigned long cfg; + + cfg = csr_read(CSR_MENVCFG) & ENVCFG_SSE; + *value = cfg != 0; + + return SBI_OK; +} + #if __riscv_xlen > 32 static int fwft_pmlen_supported(struct fwft_config *conf) { @@ -290,6 +352,18 @@ static const struct fwft_feature features[] = .get = fwft_get_misaligned_delegation, }, { + .id = SBI_FWFT_LANDING_PAD, + .supported = fwft_lpad_supported, + .set = fwft_enable_lpad, + .get = fwft_get_lpad, + }, + { + .id = SBI_FWFT_SHADOW_STACK, + .supported = fwft_sstack_supported, + .set = fwft_enable_sstack, + .get = fwft_get_sstack, + }, + { .id = SBI_FWFT_PTE_AD_HW_UPDATING, .supported = fwft_adue_supported, .set = fwft_set_adue, |