powerpc/pseries: radix is not subject to RMA limit, remove it

The radix guest is not subject to the paravirtualized HPT VRMA limit,
so remove that from ppc64_rma_size calculation for that platform.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/mm/pgtable-radix.c b/arch/powerpc/mm/pgtable-radix.c
index ddf584333bcff1131b8b695b1a8238de6046f2d2..60927d019bbf7fde14882a84d44f4a38c32b0654 100644 (file)
--- a/arch/powerpc/mm/pgtable-radix.c
+++ b/arch/powerpc/mm/pgtable-radix.c
@@ -631,15 +631,12 @@ void radix__setup_initial_memory_limit(phys_addr_t first_memblock_base,
 
        if (!early_cpu_has_feature(CPU_FTR_HVMODE)) {
                /*
-                * We limit the allocation that depend on ppc64_rma_size
-                * to first_memblock_size. We also clamp it to 1GB to
-                * avoid some funky things such as RTAS bugs.
+                * Radix mode guests are not limited by RMA / VRMA addressing.
                 *
-                * On radix config we really don't have a limitation
-                * on real mode access. But keeping it as above works
-                * well enough.
+                * We do clamp addresses to 1GB to avoid some funky things
+                * such as RTAS bugs.
                 */
-               ppc64_rma_size = min_t(u64, first_memblock_size, 0x40000000);
+               ppc64_rma_size = 0x40000000;
                /*
                 * Finally limit subsequent allocations. We really don't want
                 * to limit the memblock allocations to rma_size. FIXME!! should