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authorDavid Gibson <david@gibson.dropbear.id.au>2005-09-06 14:59:47 +1000
committerPaul Mackerras <paulus@samba.org>2005-09-06 16:57:46 +1000
commit14b34661615ec036ab4c91637913706e4caccc93 (patch)
tree98915b1889422383a85186d8455ecca69fa2327b /include
parent0fdf0b8634055b016f7b93cfcdea2eb9091f0271 (diff)
downloadop-kernel-dev-14b34661615ec036ab4c91637913706e4caccc93.zip
op-kernel-dev-14b34661615ec036ab4c91637913706e4caccc93.tar.gz
[PATCH] Invert sense of SLB class bit
Currently, we set the class bit in kernel SLB entries, and clear it on user SLB entries. On POWER5, ERAT entries created in real mode have the class bit clear. So to avoid flushing kernel ERAT entries on each context switch, this patch inverts our usage of the class bit, setting it on user SLB entries and clearing it on kernel SLB entries. Booted on POWER5 and G5. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include')
-rw-r--r--include/asm-ppc64/mmu.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/include/asm-ppc64/mmu.h b/include/asm-ppc64/mmu.h
index ad36bb2..7bc42eb 100644
--- a/include/asm-ppc64/mmu.h
+++ b/include/asm-ppc64/mmu.h
@@ -54,8 +54,10 @@ extern char initial_stab[];
#define SLB_VSID_C ASM_CONST(0x0000000000000080) /* class */
#define SLB_VSID_LS ASM_CONST(0x0000000000000070) /* size of largepage */
-#define SLB_VSID_KERNEL (SLB_VSID_KP|SLB_VSID_C)
-#define SLB_VSID_USER (SLB_VSID_KP|SLB_VSID_KS)
+#define SLB_VSID_KERNEL (SLB_VSID_KP)
+#define SLB_VSID_USER (SLB_VSID_KP|SLB_VSID_KS|SLB_VSID_C)
+
+#define SLBIE_C (0x08000000)
/*
* Hash table
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