[ARM] 5092/1: Fix the I-cache invalidation on ARMv6 and later CPUs

This patch adds the I-cache invalidation in update_mmu_cache if the
corresponding vma is marked as executable. It also invalidates the
I-cache if a thread migrates to a CPU it never ran on.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 6 insertions, 0 deletions

diff --git a/arch/arm/mm/fault-armv.c b/arch/arm/mm/fault-armv.c
index 44558d5..fbfa260 100644
--- a/arch/arm/mm/fault-armv.c
+++ b/arch/arm/mm/fault-armv.c
@@ -144,13 +144,17 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr, pte_t pte)
 	page = pfn_to_page(pfn);
 	mapping = page_mapping(page);
 	if (mapping) {
+#ifndef CONFIG_SMP
 		int dirty = test_and_clear_bit(PG_dcache_dirty, &page->flags);
 
 		if (dirty)
 			__flush_dcache_page(mapping, page);
+#endif
 
 		if (cache_is_vivt())
 			make_coherent(mapping, vma, addr, pfn);
+		else if (vma->vm_flags & VM_EXEC)
+			__flush_icache_all();
 	}
 }
 
diff --git a/arch/arm/mm/flush.c b/arch/arm/mm/flush.c
index 9df507d..029ee65 100644
--- a/arch/arm/mm/flush.c
+++ b/arch/arm/mm/flush.c
@@ -199,6 +199,8 @@ void flush_dcache_page(struct page *page)
 		__flush_dcache_page(mapping, page);
 		if (mapping && cache_is_vivt())
 			__flush_dcache_aliases(mapping, page);
+		else if (mapping)
+			__flush_icache_all();
 	}
 }
 EXPORT_SYMBOL(flush_dcache_page);