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OpenCloudOS-Kernel
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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>
This commit is contained in:
Chris Metcalf 2011-05-02 15:35:06 -04:00
parent 7194988fb5
commit 229f4df1fb
1 changed files with 7 additions and 1 deletions
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8
arch/tile/kernel/module.c
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@ -22,6 +22,7 @@
#include <linux/kernel.h> #include <linux/kernel.h>
#include <asm/opcode-tile.h> #include <asm/opcode-tile.h>
#include <asm/pgtable.h> #include <asm/pgtable.h>
#include <asm/homecache.h>
#ifdef __tilegx__ #ifdef __tilegx__
# define Elf_Rela Elf64_Rela # define Elf_Rela Elf64_Rela
@ -86,8 +87,13 @@ error:
void module_free(struct module *mod, void *module_region) void module_free(struct module *mod, void *module_region)
{ {
vfree(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. * table entries.
*/ */
} }