From: Benjamin Herrenschmidt Date: Thu, 14 Apr 2011 22:32:04 +0000 (+0000) Subject: powerpc/book3e: Use way 3 for linear mapping bolted entry X-Git-Tag: accepted/tizen/common/20141203.182822~7541^2~104 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1a51dde139d5305b2592c716c50c005d6ab9624b;p=platform%2Fkernel%2Flinux-arm64.git 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 Signed-off-by: Michael Ellerman Signed-off-by: Benjamin Herrenschmidt --- diff --git a/arch/powerpc/kernel/exceptions-64e.S b/arch/powerpc/kernel/exceptions-64e.S index 9651acc..8fe0fc2 100644 --- a/arch/powerpc/kernel/exceptions-64e.S +++ b/arch/powerpc/kernel/exceptions-64e.S @@ -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