arm64: cache: Export and add cache invalidation and clean ABIs for module use

hulk inclusion
category: feature
bugzilla: 46503
CVE: NA

---------------------------

Adding more invalidation and clean ABIs for kernel and kernel module
use.

For now we have 7 functions for module:

void flush_icache_range(unsigned long start, unsigned long end);
void inval_dcache_area(void *addr, size_t len);
void clean_dcache_area(void *addr, size_t len);
void flush_dcache_area(void *addr, size_t len);
void inval_dcache_range(unsigned long start, unsigned long end);
void clean_dcache_range(unsigned long start, unsigned long end);
void flush_dcache_range(unsigned long start, unsigned long end);
Signed-off-by: NHanjun Guo <guohanjun@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: NChen Jun <chenjun102@huawei.com>

arch/arm64/include/asm/cacheflush.h

@@ -96,12 +96,57 @@ static inline void flush_icache_range(unsigned long start, unsigned long end)
 }
 #define flush_icache_range flush_icache_range
 
+/*
+ * Ensure that any D-cache lines for the interval [addr, addr+len)
+ * are invalidated.
+ *
+ * addr: kernel address
+ * len: size of the address
+ */
+static inline void inval_dcache_area(void *addr, size_t len)
+{
+	__inval_dcache_area(addr, len);
+}
+
+/* Ensure that any D-cache lines for the interval [addr, addr+len)
+ * are cleaned to the PoC.
+ *
+ * addr: kernel address
+ * len: size of the address
+ */
+static inline void clean_dcache_area(void *addr, size_t len)
+{
+	__clean_dcache_area_poc(addr, len);
+}
+
+/* Ensure that any D-cache lines for the interval [addr, addr+len)
+ * are cleaned and invalidated to the PoC.
+ *
+ * addr: kernel address
+ * len: size of the address
+ */
 static inline void flush_dcache_area(void *addr, size_t len)
 {
 	__flush_dcache_area(addr, len);
 }
 #define flush_dcache_area flush_dcache_area
 
+/* start and end are kernel addresses */
+static inline void inval_dcache_range(unsigned long start, unsigned long end)
+{
+	__inval_dcache_area((void *)start, end - start);
+}
+
+static inline void clean_dcache_range(unsigned long start, unsigned long end)
+{
+	__clean_dcache_area_poc((void *)start, end - start);
+}
+
+static inline void flush_dcache_range(unsigned long start, unsigned long end)
+{
+	__flush_dcache_area((void *)start, end - start);
+}
+
 /*
  * Cache maintenance functions used by the DMA API. No to be used directly.
  */

arch/arm64/mm/flush.c

@@ -76,6 +76,8 @@ EXPORT_SYMBOL(flush_dcache_page);
  * Additional functions defined in assembly.
  */
 EXPORT_SYMBOL(__flush_icache_range);
+EXPORT_SYMBOL(__inval_dcache_area);
+EXPORT_SYMBOL(__clean_dcache_area_poc);
 EXPORT_SYMBOL(__flush_dcache_area);
 
 #ifdef CONFIG_ARCH_HAS_PMEM_API