[PATCH v9 07/14] xen/common: add ARM stub for the function memory_type_changed()

[Arianna Avanzini <avanzini.arianna@gmail.com>]

MTRR-related code is not available for the ARM architecture. Given
that the memory_type_changed() function would be called also from
common code, its invocation is currently ifdef'd out to be only
compiled in on an x86 machine. This commit adds an empty stub for ARM.

Signed-off-by: Arianna Avanzini <avanzini.arianna@gmail.com>
Cc: Dario Faggioli <dario.faggioli@citrix.com>
Cc: Paolo Valente <paolo.valente@unimore.it>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Julien Grall <julien.grall@citrix.com>
Cc: Ian Campbell <Ian.Campbell@eu.citrix.com>
Cc: Jan Beulich <JBeulich@suse.com>
Cc: Keir Fraser <keir@xen.org>
Cc: Tim Deegan <tim@xen.org>
Cc: Ian Jackson <Ian.Jackson@eu.citrix.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Eric Trudeau <etrudeau@broadcom.com>
Cc: Viktor Kleinik <viktor.kleinik@globallogic.com>

---

    v9:
        - Don't expose the memory_type_changed() function to common code,
          just add an empty stub in arch/arm/p2m.c and in the related header
          for ARM.

---
 xen/arch/arm/p2m.c        | 4 ++++
 xen/common/domctl.c       | 2 --
 xen/include/asm-arm/p2m.h | 2 ++
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
index 92fc4ec..1b87a4e 100644
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -14,6 +14,10 @@
 #define P2M_FIRST_ORDER 1
 #define P2M_FIRST_ENTRIES (LPAE_ENTRIES<<P2M_FIRST_ORDER)
 
+void memory_type_changed(struct domain *d)
+{
+}
+
 void dump_p2m_lookup(struct domain *d, paddr_t addr)
 {
     struct p2m_domain *p2m = &d->arch.p2m;
diff --git a/xen/common/domctl.c b/xen/common/domctl.c
index 000993f..afcd9bc 100644
--- a/xen/common/domctl.c
+++ b/xen/common/domctl.c
@@ -905,10 +905,8 @@ long do_domctl(XEN_GUEST_HANDLE_PARAM(xen_domctl_t) u_domctl)
             ret = iomem_permit_access(d, mfn, mfn + nr_mfns - 1);
         else
             ret = iomem_deny_access(d, mfn, mfn + nr_mfns - 1);
-#ifdef CONFIG_X86
         if ( !ret )
             memory_type_changed(d);
-#endif
     }
     break;
 
diff --git a/xen/include/asm-arm/p2m.h b/xen/include/asm-arm/p2m.h
index 0ef396c..0ee7cb2 100644
--- a/xen/include/asm-arm/p2m.h
+++ b/xen/include/asm-arm/p2m.h
@@ -5,6 +5,8 @@
 
 struct domain;
 
+extern void memory_type_changed(struct domain *);
+
 /* Per-p2m-table state */
 struct p2m_domain {
     /* Lock that protects updates to the p2m */
-- 
1.9.3