[PULL 24/36] KVM: PPC: Book3S HV: Flush the correct number of TLB sets on POWER8

Alexander Graf
2014-01-29T16:13:26Z

From: Paul Mackerras <paulus@samba.org>

POWER8 has 512 sets in the TLB, compared to 128 for POWER7, so we need
to do more tlbiel instructions when flushing the TLB on POWER8.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
---
arch/powerpc/kvm/book3s_hv_rmhandlers.S | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index 691dd1e..19f8819 100644
--- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
@@ -430,7 +430,13 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201)
andc r7,r7,r0
stdcx. r7,0,r6
bne 23b
- li r6,128 /* and flush the TLB */
+ /* Flush the TLB of any entries for this LPID */
+ /* use arch 2.07S as a proxy for POWER8 */
+BEGIN_FTR_SECTION
+ li r6,512 /* POWER8 has 512 sets */
+FTR_SECTION_ELSE
+ li r6,128 /* POWER7 has 128 sets */
+ALT_FTR_SECTION_END_IFSET(CPU_FTR_ARCH_207S)
mtctr r6
li r7,0x800 /* IS field = 0b10 */
ptesync
--
1.8.1.4