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lib: sbi: fwft: add support for SBI_FWFT_MISALIGNED_EXC_DELEG

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Add support for SBI_FWFT_MISALIGNED_EXC_DELEG withing FWFT support. This
support allows to delegate misaligned accesses traps.

Signed-off-by: Clément Léger <cleger@rivosinc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Clément Léger
2024-06-19 11:42:40 +02:00
committed by Anup Patel
parent aa5a859369
commit c97a1d5891
2 changed files with 41 additions and 1 deletions
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3
lib/sbi/sbi_hsm.c
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@@ -44,6 +44,7 @@ struct sbi_hsm_data {
unsigned long suspend_type;
unsigned long saved_mie;
unsigned long saved_mip;
unsigned long saved_medeleg;
atomic_t start_ticket;
};
@@ -417,6 +418,7 @@ void __sbi_hsm_suspend_non_ret_save(struct sbi_scratch *scratch)
hdata->saved_mie = csr_read(CSR_MIE);
hdata->saved_mip = csr_read(CSR_MIP) & (MIP_SSIP | MIP_STIP);
hdata->saved_medeleg = csr_read(CSR_MEDELEG);
}
static void __sbi_hsm_suspend_non_ret_restore(struct sbi_scratch *scratch)
@@ -424,6 +426,7 @@ static void __sbi_hsm_suspend_non_ret_restore(struct sbi_scratch *scratch)
struct sbi_hsm_data *hdata = sbi_scratch_offset_ptr(scratch,
hart_data_offset);
csr_write(CSR_MEDELEG, hdata->saved_medeleg);
csr_write(CSR_MIE, hdata->saved_mie);
csr_set(CSR_MIP, (hdata->saved_mip & (MIP_SSIP | MIP_STIP)));
}