Firmware/opensbi
8
0
Fork 0
forked from Mirrors/opensbi
Code Pull Requests Activity

lib: sbi: Allow custom local TLB flush function

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

16
lib/sbi/sbi_ecall_replace.c
View File

@@ -62,41 +62,43 @@ static int sbi_ecall_rfence_handler(unsigned long extid, unsigned long funcid,
switch (funcid) {
case SBI_EXT_RFENCE_REMOTE_FENCE_I:
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(regs->a0, regs->a1, &tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA:
SBI_TLB_INFO_INIT(&tlb_info, regs->a2, regs->a3, 0, 0,
SBI_TLB_FLUSH_GVMA, source_hart);
sbi_tlb_local_hfence_gvma, source_hart);
ret = sbi_tlb_request(regs->a0, regs->a1, &tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID:
SBI_TLB_INFO_INIT(&tlb_info, regs->a2, regs->a3, 0, regs->a4,
SBI_TLB_FLUSH_GVMA_VMID, source_hart);
sbi_tlb_local_hfence_gvma_vmid,
source_hart);
ret = sbi_tlb_request(regs->a0, regs->a1, &tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA:
vmid = (csr_read(CSR_HGATP) & HGATP_VMID_MASK);
vmid = vmid >> HGATP_VMID_SHIFT;
SBI_TLB_INFO_INIT(&tlb_info, regs->a2, regs->a3, 0, vmid,
SBI_TLB_FLUSH_VVMA, source_hart);
sbi_tlb_local_hfence_vvma, source_hart);
ret = sbi_tlb_request(regs->a0, regs->a1, &tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID:
vmid = (csr_read(CSR_HGATP) & HGATP_VMID_MASK);
vmid = vmid >> HGATP_VMID_SHIFT;
SBI_TLB_INFO_INIT(&tlb_info, regs->a2, regs->a3, regs->a4,
vmid, SBI_TLB_FLUSH_VVMA_ASID, source_hart);
vmid, sbi_tlb_local_hfence_vvma_asid,
source_hart);
ret = sbi_tlb_request(regs->a0, regs->a1, &tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA:
SBI_TLB_INFO_INIT(&tlb_info, regs->a2, regs->a3, 0, 0,
SBI_TLB_FLUSH_VMA, source_hart);
sbi_tlb_local_sfence_vma, source_hart);
ret = sbi_tlb_request(regs->a0, regs->a1, &tlb_info);
break;
case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID:
SBI_TLB_INFO_INIT(&tlb_info, regs->a2, regs->a3, regs->a4, 0,
SBI_TLB_FLUSH_VMA_ASID, source_hart);
sbi_tlb_local_sfence_vma_asid, source_hart);
ret = sbi_tlb_request(regs->a0, regs->a1, &tlb_info);
break;
default: