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lib: sbi: Allow custom local TLB flush function

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Currently, we have fixed TLB flush types supported by the
remote TLB library. This approach is not flexible and does
not allow custom local TLB flush function. For example,
after updating PMP entries on a set of HARTs at runtime,
we have to flush TLB on these HARTs as well.

To support custom local TLB flush function, we replace the
"type" field of "struct sbi_tlb_info" with a local TLB flush
function pointer. We also provide definitions of standard TLB
flush operations (such as fence_i, sfence.vma, hfence.vvma,
hfence.gvma, etc).

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Anup Patel
2020-12-29 13:51:06 +05:30
committed by Anup Patel
parent b7df5e4392
commit 12394a269b
4 changed files with 44 additions and 64 deletions
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9
lib/sbi/sbi_ecall_legacy.c
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@@ -80,7 +80,8 @@ static int sbi_ecall_legacy_handler(unsigned long extid, unsigned long funcid,
&hmask, out_trap);
if (ret != SBI_ETRAP) {
SBI_TLB_INFO_INIT(&tlb_info, 0, 0, 0, 0,
SBI_ITLB_FLUSH, source_hart);
sbi_tlb_local_fence_i,
source_hart);
ret = sbi_tlb_request(hmask, 0, &tlb_info);
}
break;
@@ -89,7 +90,8 @@ static int sbi_ecall_legacy_handler(unsigned long extid, unsigned long funcid,
&hmask, out_trap);
if (ret != SBI_ETRAP) {
SBI_TLB_INFO_INIT(&tlb_info, regs->a1, regs->a2, 0, 0,
SBI_TLB_FLUSH_VMA, source_hart);
sbi_tlb_local_sfence_vma,
source_hart);
ret = sbi_tlb_request(hmask, 0, &tlb_info);
}
break;
@@ -99,7 +101,8 @@ static int sbi_ecall_legacy_handler(unsigned long extid, unsigned long funcid,
if (ret != SBI_ETRAP) {
SBI_TLB_INFO_INIT(&tlb_info, regs->a1,
regs->a2, regs->a3, 0,
SBI_TLB_FLUSH_VMA_ASID, source_hart);
sbi_tlb_local_sfence_vma_asid,
source_hart);
ret = sbi_tlb_request(hmask, 0, &tlb_info);
}
break;