parisc: Implement flush_cache_vmap_vunmap

Commit Message

John David Anglin March 30, 2022, 2:39 p.m. UTC

Revise flush_cache_vmap and flush_cache_vunmap calls to use
flush_cache_vmap_vunmap. It flushes tlb to inhibit move-in
and checks that interrupts are disabled on SMP builds.

Signed-off-by: John David Anglin <[e-mail]>
---

Patch

diff --git a/arch/parisc/include/asm/cacheflush.h b/arch/parisc/include/asm/cacheflush.h
index e8b4a03343d3..fa40709698de 100644
--- a/arch/parisc/include/asm/cacheflush.h
+++ b/arch/parisc/include/asm/cacheflush.h
@@ -37,8 +37,9 @@  void flush_kernel_dcache_page_addr(void *addr);
 	flush_kernel_dcache_range_asm((start), (start)+(size));
 
 #define ARCH_IMPLEMENTS_FLUSH_KERNEL_VMAP_RANGE 1
-void flush_kernel_vmap_range(void *vaddr, int size);
-void invalidate_kernel_vmap_range(void *vaddr, int size);
+void flush_cache_vmap_vunmap(unsigned long start, unsigned long end);
+#define flush_cache_vmap(start,end)	flush_cache_vmap_vunmap(start,end)
+#define flush_cache_vunmap(start,end)	flush_cache_vmap_vunmap(start,end)
 
 #define flush_cache_vmap(start, end)		flush_cache_all()
 #define flush_cache_vunmap(start, end)		flush_cache_all()
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
index 91d218953b5c..533c5643c3fe 100644
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -653,3 +653,15 @@  void invalidate_kernel_vmap_range(void *vaddr, int size)
 	flush_tlb_kernel_range(start, end);
 }
 EXPORT_SYMBOL(invalidate_kernel_vmap_range);
+
+void flush_cache_vmap_vunmap(unsigned long start, unsigned long end)
+{
+	BUG_ON(IS_ENABLED(CONFIG_SMP) && arch_irqs_disabled());
+
+	/* Inhibit cache move-in */
+	flush_tlb_all();
+
+	/* Flush the entire cache to remove all aliases */
+	flush_cache_all();
+}
+EXPORT_SYMBOL(flush_cache_vmap_vunmap);