riscv: errata: thead: only set cbom size & noncoherent during boot

The CBOM size and whether the HW is noncoherent is known and
determined during booting and won't change after that.

Signed-off-by: Jisheng Zhang <[email protected]>
Reviewed-by: Conor Dooley <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Palmer Dabbelt <[email protected]>

Author: xhackerustc

arch/riscv/errata/thead/errata.c

@@ -45,8 +45,11 @@ static bool errata_probe_cmo(unsigned int stage,
 	if (stage == RISCV_ALTERNATIVES_EARLY_BOOT)
 		return false;
 
-	riscv_cbom_block_size = L1_CACHE_BYTES;
-	riscv_noncoherent_supported();
+	if (stage == RISCV_ALTERNATIVES_BOOT) {
+		riscv_cbom_block_size = L1_CACHE_BYTES;
+		riscv_noncoherent_supported();
+	}
+
 	return true;
 }