From 229f4df1fb84e5d3306b4fc49b41f7847340092d Mon Sep 17 00:00:00 2001
From: Chris Metcalf <cmetcalf@tilera.com>
Date: Mon, 2 May 2011 15:35:06 -0400
Subject: [PATCH] arch/tile: properly flush the I$ when unloading kernel
modules
Otherwise, in principle, there could be stale I$ data present
next time the page that previously held the kernel module code was
used to run some new code.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
---
arch/tile/kernel/module.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/arch/tile/kernel/module.c b/arch/tile/kernel/module.c
index e2ab82b7c7e71..f68df69f1f67b 100644
--- a/arch/tile/kernel/module.c
+++ b/arch/tile/kernel/module.c
@@ -22,6 +22,7 @@
#include <linux/kernel.h>
#include <asm/opcode-tile.h>
#include <asm/pgtable.h>
+#include <asm/homecache.h>
#ifdef __tilegx__
# define Elf_Rela Elf64_Rela
@@ -86,8 +87,13 @@ void *module_alloc(unsigned long size)
void module_free(struct module *mod, void *module_region)
{
vfree(module_region);
+
+ /* Globally flush the L1 icache. */
+ flush_remote(0, HV_FLUSH_EVICT_L1I, cpu_online_mask,
+ 0, 0, 0, NULL, NULL, 0);
+
/*
- * FIXME: If module_region == mod->init_region, trim exception
+ * FIXME: If module_region == mod->module_init, trim exception
* table entries.
*/
}
--
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