opensbi.git/lib/sbi/sbi_tlb.c, 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: Allow forceful queueing of data in sbi_fifo_enqueue()

2024-07-24T06:48:36Z

Extend sbi_fifo_enqueue() to allow forceful queueing by droping data from the tail. Signed-off-by: Anup Patel Reviewed-By: Himanshu Chauhan

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

lib: sbi_tlb: Check tlb_range_flush_limit only once per request

2023-12-11T05:11:48Z

The tlb_update() callback is called for each destination hart. Move the size check earlier, so it is executed only once. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

lib: sbi: Correctly limit flushes to a single ASID/VMID

2023-11-16T03:51:47Z

Per the SBI specification, the effects of these functions are limited to a specific ASID and/or VMID. This applies even when flushing the entire address space. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

lib: sbi: Prefer hartindex over hartid in IPI framework

2023-09-24T06:09:38Z

Let us prefer hartindex over hartid in IPI framework which in-turn forces IPI users to also prefer hartindex. Signed-off-by: Anup Patel

lib: sbi: Use sbi_scratch_last_hartindex() in remote TLB managment

2023-09-24T06:09:35Z

The sbi_hartid_to_scratch() involves translating hartid to hartindex which is expensive so let's use sbi_hartindex_to_scratch() instead. Signed-off-by: Anup Patel

lib: sbi: Extend sbi_hartmask to support both hartid and hartindex

2023-09-24T06:09:32Z

Currently, the sbi_hartmask is indexed by hartid which puts a limit on hartid to be less than SBI_HARTMASK_MAX_BITS. We extend the sbi_hartmask implementation to use hartindex and support updating sbi_hartmask using hartid. This removes the limit on hartid and existing code works largely unmodified. Signed-off-by: Xiang W Signed-off-by: Anup Patel

lib: sbi: alloc tlb fifo by sbi_malloc

2023-09-10T06:16:44Z

If the system is defined from tlb_fifo_num_entries, the scratch may be too small to hold the fifo, so it is alloc through the heap. Signed-off-by: Xiang W Signed-off-by: Xing Xiaoguang Reviewed-by: Anup Patel