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lib: Optimize unpriv load/store implementation
This patch optimize unpriv load/store implementation by having dedicated unpriv trap handler (just like KVM RISC-V). As a result of this optimization: 1. We have reduced roughly 13+ instruction in all unpriv load/store functions. The reduced instruction also include two function calls. 2. Per-HART trap info pointer in scratch space is now redundant hence removed. 3. The sbi_trap_handler() is now much cleaner because we don't have to handle unpriv load/store traps. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
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@@ -16,9 +16,11 @@ struct sbi_scratch;
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int sbi_hart_init(struct sbi_scratch *scratch, u32 hartid, bool cold_boot);
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void *sbi_hart_get_trap_info(struct sbi_scratch *scratch);
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void sbi_hart_set_trap_info(struct sbi_scratch *scratch, void *data);
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extern void (*sbi_hart_unpriv_trap)(void);
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static inline ulong sbi_hart_unpriv_trap_addr(void)
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{
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return (ulong)sbi_hart_unpriv_trap;
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}
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void sbi_hart_delegation_dump(struct sbi_scratch *scratch);
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void sbi_hart_pmp_dump(struct sbi_scratch *scratch);
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