diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-05-20 17:23:22 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-05-24 18:13:44 +1000 |
| commit | 8fc1f5d7eff9a4ed0cdb7215e7ca4b82b931d6d7 (patch) | |
| tree | 63ecb8026f3b56bbc2da276b23d4d06fbccf467e /arch/powerpc/kernel | |
| parent | 1ad936e850a896bc16e0d72a56be432f9954ad7e (diff) | |
powerpc: Fix TLB cleanup at boot on POWER8
The TLB has 512 congruence classes (2048 entries 4 way set associative)
while P7 had 128
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/cpu_setup_power.S | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/cpu_setup_power.S b/arch/powerpc/kernel/cpu_setup_power.S index a283b6442b26..18b5b9cf8e37 100644 --- a/arch/powerpc/kernel/cpu_setup_power.S +++ b/arch/powerpc/kernel/cpu_setup_power.S @@ -135,8 +135,12 @@ __init_HFSCR: blr __init_TLB: - /* Clear the TLB */ - li r6,128 + /* + * Clear the TLB using the "IS 3" form of tlbiel instruction + * (invalidate by congruence class). P7 has 128 CCs, P8 has 512 + * so we just always do 512 + */ + li r6,512 mtctr r6 li r7,0xc00 /* IS field = 0b11 */ ptesync |