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authorLeonid Yegoshin <Leonid.Yegoshin@imgtec.com>2014-07-12 02:18:05 +0400
committerRalf Baechle <ralf@linux-mips.org>2014-08-01 20:52:16 +0400
commit1062080a7d8dbe08cefce728341285e77930ef49 (patch)
tree6042a763266cf9e1d444ce263e11df2ca74c9a4d /arch/mips/mm/tlbex.c
parentc7fb97d65aece5b03a9209ea5a9670e952c62f34 (diff)
downloadlinux-1062080a7d8dbe08cefce728341285e77930ef49.tar.xz
MIPS: bugfix: missed cache flush of TLB refill handler
Commit Commit 1d40cfcd3442a53e98468cdb3e6d4d9a568d76cf Author: Ralf Baechle <ralf@linux-mips.org> Date: Fri Jul 15 15:23:23 2005 +0000 Avoid SMP cacheflushes. This is a minor optimization of startup but will also avoid smp_call_function from doing stupid things when called from a CPU that is not yet marked online. missed an appropriate cache flush of TLB refill handler because that time it was at fixed location CAC_BASE. After years the refill handler in EBASE vector is not at that location and can be allocated in some another memory and needs I-cache sync as other TLB exception vectors. Besides that, the new function - local_flash_icache_range() was introduced to avoid SMP cacheflushes. Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Cc: linux-mips@linux-mips.org Cc: paul.gortmaker@windriver.com Cc: jchandra@broadcom.com Cc: linux-kernel@vger.kernel.org Cc: david.daney@cavium.com Patchwork: https://patchwork.linux-mips.org/patch/7312/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/mm/tlbex.c')
-rw-r--r--arch/mips/mm/tlbex.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c
index 343fe0f559b1..cf8a9525f0fa 100644
--- a/arch/mips/mm/tlbex.c
+++ b/arch/mips/mm/tlbex.c
@@ -429,6 +429,7 @@ static void build_r3000_tlb_refill_handler(void)
(unsigned int)(p - tlb_handler));
memcpy((void *)ebase, tlb_handler, 0x80);
+ local_flush_icache_range(ebase, ebase + 0x80);
dump_handler("r3000_tlb_refill", (u32 *)ebase, 32);
}
@@ -1416,6 +1417,7 @@ static void build_r4000_tlb_refill_handler(void)
final_len);
memcpy((void *)ebase, final_handler, 0x100);
+ local_flush_icache_range(ebase, ebase + 0x100);
dump_handler("r4000_tlb_refill", (u32 *)ebase, 64);
}