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[linux-6.6.y] LoongArch: Update the flush cache policy #326

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Merged
opsiff merged 1 commit into from
Jul 18, 2024
Merged

[linux-6.6.y] LoongArch: Update the flush cache policy #326

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23 changes: 22 additions & 1 deletion arch/loongarch/mm/cache.c
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Original file line number Diff line number Diff line change
Expand Up @@ -63,6 +63,27 @@ static void flush_cache_leaf(unsigned int leaf)
} while (--nr_nodes > 0);
}

static void flush_cache_last_level(unsigned int leaf)
{
u64 addr;
int i, j, nr_nodes;
struct cache_desc *cdesc = current_cpu_data.cache_leaves + leaf;

nr_nodes = loongson_sysconf.nr_nodes;

addr = CSR_DMW1_BASE;
iocsr_write32(0x1, 0x280);
do {
for (i = 0; i < (cdesc->ways * 3); i++) {
for (j = 0; j < (cdesc->sets); j++) {
*(volatile u32 *)addr;
addr += cdesc->linesz;
}
}
addr += 0x100000000000;
} while (--nr_nodes > 0);
}

asmlinkage __visible void __flush_cache_all(void)
{
int leaf;
Expand All @@ -71,7 +92,7 @@ asmlinkage __visible void __flush_cache_all(void)

leaf = cache_present - 1;
if (cache_inclusive(cdesc + leaf)) {
flush_cache_leaf(leaf);
flush_cache_last_level(leaf);
return;
}

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