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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>
This commit is contained in:
Benjamin Herrenschmidt 2013-05-20 17:23:22 +00:00
parent 1ad936e850
commit 8fc1f5d7ef
1 changed files with 6 additions and 2 deletions
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8
arch/powerpc/kernel/cpu_setup_power.S
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@ -135,8 +135,12 @@ __init_HFSCR:
blr blr
__init_TLB: __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 mtctr r6
li r7,0xc00 /* IS field = 0b11 */ li r7,0xc00 /* IS field = 0b11 */
ptesync ptesync