[PATCH kvm-unit-tests v3 07/11] s390x: initialize the physical allocator

[David Hildenbrand <david@redhat.com>]

We now have the range of free memory, let's initialize the physical
allocator. It is now possible to use use malloc and memalign, based on the
early-ops. alloc_pages() cannot be used yet (as it has to be initialized
via free_pages() - e.g. via setup_vm() - first)

Signed-off-by: David Hildenbrand <david@redhat.com>
---
 lib/s390x/sclp.c | 12 ++++++++++++
 s390x/Makefile   |  3 +++
 2 files changed, 15 insertions(+)

diff --git a/lib/s390x/sclp.c b/lib/s390x/sclp.c
index 199405c..c7471b1 100644
--- a/lib/s390x/sclp.c
+++ b/lib/s390x/sclp.c
@@ -15,11 +15,21 @@
 #include <asm/arch_def.h>
 #include <asm/interrupt.h>
 #include "sclp.h"
+#include <alloc_phys.h>
+
+extern unsigned long stacktop;
 
 static uint64_t storage_increment_size;
 static uint64_t max_ram_size;
 static uint64_t ram_size;
 
+static void mem_init(phys_addr_t mem_end)
+{
+	phys_addr_t freemem_start = (phys_addr_t)&stacktop & PAGE_MASK;
+
+	phys_alloc_init(freemem_start, mem_end - freemem_start);
+}
+
 void sclp_memory_setup(void)
 {
 	ReadInfo *ri = (void *)_sccb;
@@ -55,4 +65,6 @@ void sclp_memory_setup(void)
 			break;
 		ram_size += storage_increment_size;
 	}
+
+	mem_init(ram_size);
 }
diff --git a/s390x/Makefile b/s390x/Makefile
index ce63dd1..4198fdc 100644
--- a/s390x/Makefile
+++ b/s390x/Makefile
@@ -21,6 +21,9 @@ asm-offsets = lib/$(ARCH)/asm-offsets.h
 include $(SRCDIR)/scripts/asm-offsets.mak
 
 cflatobjs += lib/util.o
+cflatobjs += lib/alloc.o
+cflatobjs += lib/alloc_phys.o
+cflatobjs += lib/alloc_page.o
 cflatobjs += lib/alloc_phys.o
 cflatobjs += lib/s390x/io.o
 cflatobjs += lib/s390x/stack.o
-- 
2.14.3