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lib: sbi_hart: Enable hcontext and scontext

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According to the description in "riscv-state-enable[0]", to access
h/scontext in S-Mode, we need to enable the 57th bit.

If it is not enabled, an "illegal instruction" error will occur.

Link: a28bfae443/content.adoc [0]

Signed-off-by: Nylon Chen <nylon.chen@sifive.com>
Reviewed-by: Zong Li <zong.li@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Nylon Chen 2023-02-10 16:52:38 +08:00 • committed by Anup Patel
parent 4f2be40102
commit 30ea8069f4
2 changed files with 3 additions and 0 deletions
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2
include/sbi/riscv_encoding.h
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@ -736,6 +736,8 @@
#define SMSTATEEN0_CS (_ULL(1) << SMSTATEEN0_CS_SHIFT)
#define SMSTATEEN0_FCSR_SHIFT 1
#define SMSTATEEN0_FCSR (_ULL(1) << SMSTATEEN0_FCSR_SHIFT)
#define SMSTATEEN0_CONTEXT_SHIFT 57
#define SMSTATEEN0_CONTEXT (_ULL(1) << SMSTATEEN0_CONTEXT_SHIFT)
#define SMSTATEEN0_IMSIC_SHIFT 58
#define SMSTATEEN0_IMSIC (_ULL(1) << SMSTATEEN0_IMSIC_SHIFT)
#define SMSTATEEN0_AIA_SHIFT 59

1
lib/sbi/sbi_hart.c
View file

@ -90,6 +90,7 @@ static void mstatus_init(struct sbi_scratch *scratch)
mstateen_val |= ((uint64_t)csr_read(CSR_MSTATEEN0H)) << 32;
#endif
mstateen_val |= SMSTATEEN_STATEN;
mstateen_val |= SMSTATEEN0_CONTEXT;
mstateen_val |= SMSTATEEN0_HSENVCFG;
if (sbi_hart_has_extension(scratch, SBI_HART_EXT_SMAIA))