[xen staging] xen/arm: introduce CDF_staticmem

[patchbot@xxxxxxx]

commit 5ebd3da7c95d1320e3005105d0163652d3f271b5
Author:     Penny Zheng <Penny.Zheng@xxxxxxx>
AuthorDate: Tue Sep 6 15:39:15 2022 +0800
Commit:     Julien Grall <jgrall@xxxxxxxxxx>
CommitDate: Tue Sep 6 17:53:35 2022 +0100

    xen/arm: introduce CDF_staticmem
    
    In order to have an easy and quick way to find out whether this domain 
memory
    is statically configured, this commit introduces a new flag CDF_staticmem 
and a
    new helper is_domain_using_staticmem() to tell.
    
    Signed-off-by: Penny Zheng <penny.zheng@xxxxxxx>
    Acked-by: Julien Grall <jgrall@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/arch/arm/domain_build.c | 5 ++++-
 xen/include/xen/domain.h    | 8 ++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index 3fd1186b53..b76a84e8f5 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -3287,9 +3287,12 @@ void __init create_domUs(void)
         if ( !dt_device_is_compatible(node, "xen,domain") )
             continue;
 
+        if ( dt_find_property(node, "xen,static-mem", NULL) )
+            flags |= CDF_staticmem;
+
         if ( dt_property_read_bool(node, "direct-map") )
         {
-            if ( !IS_ENABLED(CONFIG_STATIC_MEMORY) || !dt_find_property(node, 
"xen,static-mem", NULL) )
+            if ( !(flags & CDF_staticmem) )
                 panic("direct-map is not valid for domain %s without static 
allocation.\n",
                       dt_node_name(node));
 
diff --git a/xen/include/xen/domain.h b/xen/include/xen/domain.h
index 628b14b086..2c8116afba 100644
--- a/xen/include/xen/domain.h
+++ b/xen/include/xen/domain.h
@@ -35,6 +35,14 @@ void arch_get_domain_info(const struct domain *d,
 /* Should domain memory be directly mapped? */
 #define CDF_directmap            (1U << 1)
 #endif
+/* Is domain memory on static allocation? */
+#ifdef CONFIG_STATIC_MEMORY
+#define CDF_staticmem            (1U << 2)
+#else
+#define CDF_staticmem            0
+#endif
+
+#define is_domain_using_staticmem(d) ((d)->cdf & CDF_staticmem)
 
 /*
  * Arch-specifics.
--
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