ppc64 iSeries: Update create_pte_mapping to replace iSeries_bolt_kernel()

early_setup() calls htab_initialize() which is similar, but not identical
to iSeries_bolt_kernel().

On iSeries the Hypervisor has already inserted some ptes for us, and we
simply have to detect that and bolt them. iSeries_hpte_bolt_or_insert()
implements that logic.

For the case of a non-existing pte we just call iSeries_hpte_insert(). This
appears to work, although it's not entirely equivalent to the old code in
iSeries_make_pte() which panicked if we got a secondary slot. Not sure if
that's important.

Finally we call iSeries_hpte_bolt_or_insert() from create_pte_mapping(),
which is called from htab_initialize() for each lmb region.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/asm-ppc64/mmu.h b/include/asm-ppc64/mmu.h
index d2b0b796d35e..e0505acb77d9 100644
--- a/include/asm-ppc64/mmu.h
+++ b/include/asm-ppc64/mmu.h
@@ -206,6 +206,10 @@ extern long native_hpte_insert(unsigned long hpte_group, unsigned long va,
                                unsigned long prpn,
                                unsigned long vflags, unsigned long rflags);
 
+extern long iSeries_hpte_bolt_or_insert(unsigned long hpte_group,
+                unsigned long va, unsigned long prpn,
+                unsigned long vflags, unsigned long rflags);
+
 extern void stabs_alloc(void);
 
 #endif /* __ASSEMBLY__ */