[S390] System z large page support.
This adds hugetlbfs support on System z, using both hardware large page
support if available and software large page emulation on older hardware.
Shared (large) page tables are implemented in software emulation mode,
by using page->index of the first tail page from a compound large page
to store page table information.
Signed-off-by: Gerald Schaefer <geraldsc@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/include/asm-s390/setup.h b/include/asm-s390/setup.h
index 3a9e458..ba69674 100644
--- a/include/asm-s390/setup.h
+++ b/include/asm-s390/setup.h
@@ -69,6 +69,8 @@
#define MACHINE_FLAG_DIAG9C (1UL << 7)
#define MACHINE_FLAG_MVCOS (1UL << 8)
#define MACHINE_FLAG_KVM (1UL << 9)
+#define MACHINE_FLAG_HPAGE (1UL << 10)
+#define MACHINE_FLAG_PFMF (1UL << 11)
#define MACHINE_IS_VM (machine_flags & MACHINE_FLAG_VM)
#define MACHINE_IS_KVM (machine_flags & MACHINE_FLAG_KVM)
@@ -82,6 +84,8 @@
#define MACHINE_HAS_DIAG44 (1)
#define MACHINE_HAS_MVPG (machine_flags & MACHINE_FLAG_MVPG)
#define MACHINE_HAS_MVCOS (0)
+#define MACHINE_HAS_HPAGE (0)
+#define MACHINE_HAS_PFMF (0)
#else /* __s390x__ */
#define MACHINE_HAS_IEEE (1)
#define MACHINE_HAS_CSP (1)
@@ -89,6 +93,8 @@
#define MACHINE_HAS_DIAG44 (machine_flags & MACHINE_FLAG_DIAG44)
#define MACHINE_HAS_MVPG (1)
#define MACHINE_HAS_MVCOS (machine_flags & MACHINE_FLAG_MVCOS)
+#define MACHINE_HAS_HPAGE (machine_flags & MACHINE_FLAG_HPAGE)
+#define MACHINE_HAS_PFMF (machine_flags & MACHINE_FLAG_PFMF)
#endif /* __s390x__ */
#define MACHINE_HAS_SCLP (!MACHINE_IS_P390)