opensbi.git/include/sbi/sbi_tlb.h, branch master

lib: sbi: Allow platforms to override local TLB operations

2026-08-20T15:00:48Z

Some T-Head based processors, for example the Sophgo SG2044, have a JTLB errata that requires special handling of certain TLB maintenance instructions (sfence.vma). Introduce a sbi_tlb_local_operations structure so platforms can provide custom local TLB flush implementations. Use it to implement the JTLB workaround on affected SoCs (currently Sophgo SG2044). Signed-off-by: Xiang W Signed-off-by: Han Gao Reviewed-by: Anup Patel Link: https://lore.kernel.org/r/20260617112925.1144190-2-wangxiang@iscas.ac.cn Signed-off-by: Anup Patel

lib: sbi: Expose __sbi_sfence_vma_all() function

2025-12-16T14:49:21Z

The __sbi_sfence_vma_all() can be shared by different parts of OpenSBI so rename __tlb_flush_all() to __sbi_sfence_vma_all() and make it global function. Signed-off-by: Andrew Waterman Signed-off-by: Anup Patel Link: https://lore.kernel.org/r/20251127112121.334023-2-apatel@ventanamicro.com Signed-off-by: Anup Patel

lib: sbi_tlb: Reduce size of struct sbi_tlb_info

2023-12-19T10:26:37Z

Let us reduce the size of struct sbi_tlb_info by doing the following: 1) Change the data type of asid and vmid fields to uint16_t 2) Replace local_fn() function pointer with an enum Based on the above, the size of struct sbi_tlb_info is reduced by 16 bytes on RV64 and 4 bytes on RV32. Signed-off-by: Anup Patel

platform: Allow platforms to specify the size of tlb fifo

2023-09-10T05:51:05Z

For some platforms with a particularly high number of harts, if the tlb fifo is too small, it case harts to wait. Platforms should be allowed to specify the size of the tlb fifo. Signed-off-by: Xiang W Signed-off-by: Xing Xiaoguang Reviewed-by: Anup Patel

lib: sbi: Allow custom local TLB flush function

2021-01-07T04:23:19Z

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 Reviewed-by: Atish Patra

lib: sbi_tlb: Fix remote TLB HFENCE VVMA implementation

2020-05-07T03:25:38Z

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 Reviewed-by: Atish Patra

include: sbi_tlb: Remove scratch parameter from sbi_tlb_request()

2020-03-28T08:02:44Z

The sbi_ipi_send_many() should get current HART scratch pointer on it's own using eventually hence removing scratch parameter from sbi_tlb_request(). Signed-off-by: Anup Patel

lib: sbi_tlb: Use sbi_hartmask in sbi_tlb_info

2020-03-11T09:59:57Z

Instead of using single ulong as source mask for sbi_tlb_info, we use sbi_hartmask. This way sbi_tlb_info can easily scale for large number of HARTs. Signed-off-by: Anup Patel Reviewed-by: Bin Meng Reviewed-by: Atish Patra

lib: Introduce SBI_TLB_INFO_INIT() helper macro

2020-03-11T09:59:55Z

We introduce SBI_TLB_INFO_INIT() helper macro to help easy initialization of struct sbi_tlb_info which is passed to the sbi_tlb_request() API. Signed-off-by: Anup Patel Reviewed-by: Bin Meng Reviewed-by: Atish Patra

lib: Drop _fifo from the name of various sbi_tlb_fifo_xyz() functions

2020-01-22T06:40:47Z

This patch drops _fifo from the name of various sbi_tlb_fifo_xyz() functions because all these functions deal with remote TLB managment and FIFO is the per-HART data structure used internally by remote TLB implementation. Signed-off-by: Anup Patel Reviewed-by: Atish Patra