diff options
Diffstat (limited to '')
| -rw-r--r-- | arch/riscv/mm/cacheflush.c | 43 |
1 files changed, 39 insertions, 4 deletions
diff --git a/arch/riscv/mm/cacheflush.c b/arch/riscv/mm/cacheflush.c index 89f81067e09e..57b40a350420 100644 --- a/arch/riscv/mm/cacheflush.c +++ b/arch/riscv/mm/cacheflush.c @@ -3,6 +3,7 @@ * Copyright (C) 2017 SiFive */ +#include <linux/of.h> #include <asm/cacheflush.h> #ifdef CONFIG_SMP @@ -67,10 +68,7 @@ void flush_icache_mm(struct mm_struct *mm, bool local) */ smp_mb(); } else if (IS_ENABLED(CONFIG_RISCV_SBI)) { - cpumask_t hartid_mask; - - riscv_cpuid_to_hartid_mask(&others, &hartid_mask); - sbi_remote_fence_i(cpumask_bits(&hartid_mask)); + sbi_remote_fence_i(&others); } else { on_each_cpu_mask(&others, ipi_remote_fence_i, NULL, 1); } @@ -89,3 +87,40 @@ void flush_icache_pte(pte_t pte) flush_icache_all(); } #endif /* CONFIG_MMU */ + +unsigned int riscv_cbom_block_size; +EXPORT_SYMBOL_GPL(riscv_cbom_block_size); + +void riscv_init_cbom_blocksize(void) +{ + struct device_node *node; + unsigned long cbom_hartid; + u32 val, probed_block_size; + int ret; + + probed_block_size = 0; + for_each_of_cpu_node(node) { + unsigned long hartid; + + ret = riscv_of_processor_hartid(node, &hartid); + if (ret) + continue; + + /* set block-size for cbom extension if available */ + ret = of_property_read_u32(node, "riscv,cbom-block-size", &val); + if (ret) + continue; + + if (!probed_block_size) { + probed_block_size = val; + cbom_hartid = hartid; + } else { + if (probed_block_size != val) + pr_warn("cbom-block-size mismatched between harts %lu and %lu\n", + cbom_hartid, hartid); + } + } + + if (probed_block_size) + riscv_cbom_block_size = probed_block_size; +} |