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Commit 1a51dde1 authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt
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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: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent ca1769f7

arch/powerpc/kernel/exceptions-64e.S

+3 −2
Original line number Diff line number Diff line
@@ -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