These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / arch / arm / include / asm / cacheflush.h

diff --git a/kernel/arch/arm/include/asm/cacheflush.h b/kernel/arch/arm/include/asm/cacheflush.h
index 2d46862..d5525bf 100644 (file)
--- a/kernel/arch/arm/include/asm/cacheflush.h
+++ b/kernel/arch/arm/include/asm/cacheflush.h
@@ -140,8 +140,6 @@ extern struct cpu_cache_fns cpu_cache;
  * is visible to DMA, or data written by DMA to system memory is
  * visible to the CPU.
  */
-#define dmac_map_area                  cpu_cache.dma_map_area
-#define dmac_unmap_area                        cpu_cache.dma_unmap_area
 #define dmac_flush_range               cpu_cache.dma_flush_range
 
 #else
@@ -161,8 +159,6 @@ extern void __cpuc_flush_dcache_area(void *, size_t);
  * is visible to DMA, or data written by DMA to system memory is
  * visible to the CPU.
  */
-extern void dmac_map_area(const void *, size_t, int);
-extern void dmac_unmap_area(const void *, size_t, int);
 extern void dmac_flush_range(const void *, const void *);
 
 #endif
@@ -482,10 +478,17 @@ static inline void __sync_cache_range_r(volatile void *p, size_t size)
        : : : "r0","r1","r2","r3","r4","r5","r6","r7", \
              "r9","r10","lr","memory" )
 
+#ifdef CONFIG_MMU
 int set_memory_ro(unsigned long addr, int numpages);
 int set_memory_rw(unsigned long addr, int numpages);
 int set_memory_x(unsigned long addr, int numpages);
 int set_memory_nx(unsigned long addr, int numpages);
+#else
+static inline int set_memory_ro(unsigned long addr, int numpages) { return 0; }
+static inline int set_memory_rw(unsigned long addr, int numpages) { return 0; }
+static inline int set_memory_x(unsigned long addr, int numpages) { return 0; }
+static inline int set_memory_nx(unsigned long addr, int numpages) { return 0; }
+#endif
 
 #ifdef CONFIG_DEBUG_RODATA
 void mark_rodata_ro(void);
@@ -499,4 +502,21 @@ static inline void set_kernel_text_ro(void) { }
 void flush_uprobe_xol_access(struct page *page, unsigned long uaddr,
                             void *kaddr, unsigned long len);
 
+/**
+ * secure_flush_area - ensure coherency across the secure boundary
+ * @addr: virtual address
+ * @size: size of region
+ *
+ * Ensure that the specified area of memory is coherent across the secure
+ * boundary from the non-secure side.  This is used when calling secure
+ * firmware where the secure firmware does not ensure coherency.
+ */
+static inline void secure_flush_area(const void *addr, size_t size)
+{
+       phys_addr_t phys = __pa(addr);
+
+       __cpuc_flush_dcache_area((void *)addr, size);
+       outer_flush_range(phys, phys + size);
+}
+
 #endif