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powerpc/book3e: Use way 3 for linear mapping bolted entry 

An erratum on A2 can lead to the bolted entry we insert for the linear
mapping being evicted, to avoid that write the bolted entry to way 3.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt 2011-04-14 22:32:04 +00:00
parent ca1769f7a3
commit 1a51dde139
1 changed files with 3 additions and 2 deletions
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5
arch/powerpc/kernel/exceptions-64e.S
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@ -864,8 +864,9 @@ have_hes:
* that will have to be made dependent on whether we are running under
* a hypervisor I suppose.
*/
ori r3,r3,MAS0_HES | MAS0_WQ_ALLWAYS
mtspr SPRN_MAS0,r3
ori r11,r3,MAS0_WQ_ALLWAYS
oris r11,r11,MAS0_ESEL(3)@h /* Use way 3: workaround A2 erratum 376 */
mtspr SPRN_MAS0,r11
lis r3,(MAS1_VALID | MAS1_IPROT)@h
ori r3,r3,BOOK3E_PAGESZ_1GB << MAS1_TSIZE_SHIFT
mtspr SPRN_MAS1,r3