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lib: sbi_tlb: Fix remote TLB HFENCE VVMA implementation

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The HFENCE VVMA instructions flushes TLB based on the VMID
present in HGATP CSR. To handle this, we get the current
VMID for SBI HFENCE VVMA call and we use this current VMID
to do remote TLB HFENCE VVMA on desired set of HARTs.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Anup Patel
2020-05-04 10:58:07 +05:30
committed by Anup Patel
parent 7993ca2c8e
commit 5338679ff0
5 changed files with 69 additions and 22 deletions
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7
lib/sbi/sbi_ecall_legacy.c
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@@ -76,7 +76,7 @@ static int sbi_ecall_legacy_handler(unsigned long extid, unsigned long funcid,
ret = sbi_load_hart_mask_unpriv((ulong *)args[0],
&hmask, out_trap);
if (ret != SBI_ETRAP) {
SBI_TLB_INFO_INIT(&tlb_info, 0, 0, 0,
SBI_TLB_INFO_INIT(&tlb_info, 0, 0, 0, 0,
SBI_ITLB_FLUSH, source_hart);
ret = sbi_tlb_request(hmask, 0, &tlb_info);
}
@@ -85,7 +85,7 @@ static int sbi_ecall_legacy_handler(unsigned long extid, unsigned long funcid,
ret = sbi_load_hart_mask_unpriv((ulong *)args[0],
&hmask, out_trap);
if (ret != SBI_ETRAP) {
SBI_TLB_INFO_INIT(&tlb_info, args[1], args[2], 0,
SBI_TLB_INFO_INIT(&tlb_info, args[1], args[2], 0, 0,
SBI_TLB_FLUSH_VMA, source_hart);
ret = sbi_tlb_request(hmask, 0, &tlb_info);
}
@@ -95,7 +95,8 @@ 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, args[1], args[2], args[3],
SBI_TLB_FLUSH_VMA_ASID, source_hart);
0, SBI_TLB_FLUSH_VMA_ASID,
source_hart);
ret = sbi_tlb_request(hmask, 0, &tlb_info);
}
break;