[PATCH v4 3/6] xen: add field "flags" to cover all internal CDF_XXX

[Penny Zheng <Penny.Zheng@xxxxxxx>]

With more and more CDF_xxx internal flags in and to save the space, this
commit introduces a new field "flags" in struct domain to store CDF_*
internal flags directly.

Another new CDF_xxx will be introduced in the next patch.

Signed-off-by: Penny Zheng <penny.zheng@xxxxxxx>
Acked-by: Julien Grall <jgrall@xxxxxxxxxx>
---
v4 changes:
- no change
---
v3 changes:
- change fixed width type uint32_t to unsigned int
- change "flags" to a more descriptive name "cdf"
---
v2 changes:
- let "flags" live in the struct domain. So other arch can take
advantage of it in the future
- fix coding style
---
 xen/arch/arm/domain.c             | 2 --
 xen/arch/arm/include/asm/domain.h | 3 +--
 xen/common/domain.c               | 3 +++
 xen/include/xen/sched.h           | 3 +++
 4 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/xen/arch/arm/domain.c b/xen/arch/arm/domain.c
index 8110c1df86..74189d9878 100644
--- a/xen/arch/arm/domain.c
+++ b/xen/arch/arm/domain.c
@@ -709,8 +709,6 @@ int arch_domain_create(struct domain *d,
     ioreq_domain_init(d);
 #endif
 
-    d->arch.directmap = flags & CDF_directmap;
-
     /* p2m_init relies on some value initialized by the IOMMU subsystem */
     if ( (rc = iommu_domain_init(d, config->iommu_opts)) != 0 )
         goto fail;
diff --git a/xen/arch/arm/include/asm/domain.h 
b/xen/arch/arm/include/asm/domain.h
index ed63c2b6f9..fe7a029ebf 100644
--- a/xen/arch/arm/include/asm/domain.h
+++ b/xen/arch/arm/include/asm/domain.h
@@ -29,7 +29,7 @@ enum domain_type {
 #define is_64bit_domain(d) (0)
 #endif
 
-#define is_domain_direct_mapped(d) (d)->arch.directmap
+#define is_domain_direct_mapped(d) ((d)->cdf & CDF_directmap)
 
 /*
  * Is the domain using the host memory layout?
@@ -103,7 +103,6 @@ struct arch_domain
     void *tee;
 #endif
 
-    bool directmap;
 }  __cacheline_aligned;
 
 struct arch_vcpu
diff --git a/xen/common/domain.c b/xen/common/domain.c
index 8d2c2a9897..6373407047 100644
--- a/xen/common/domain.c
+++ b/xen/common/domain.c
@@ -567,6 +567,9 @@ struct domain *domain_create(domid_t domid,
     /* Sort out our idea of is_system_domain(). */
     d->domain_id = domid;
 
+    /* Holding CDF_* internal flags. */
+    d->cdf = flags;
+
     /* Debug sanity. */
     ASSERT(is_system_domain(d) ? config == NULL : config != NULL);
 
diff --git a/xen/include/xen/sched.h b/xen/include/xen/sched.h
index ed8539f6d2..49415a113a 100644
--- a/xen/include/xen/sched.h
+++ b/xen/include/xen/sched.h
@@ -591,6 +591,9 @@ struct domain
         struct ioreq_server     *server[MAX_NR_IOREQ_SERVERS];
     } ioreq_server;
 #endif
+
+    /* Holding CDF_* constant. Internal flags for domain creation. */
+    unsigned int cdf;
 };
 
 static inline struct page_list_head *page_to_list(
-- 
2.25.1