KVM: PPC: Book3S HV: Flush the correct number of TLB sets on POWER8

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>

diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index 691dd1e..19f8819 100644 (file)
--- 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