[Xen-changelog] [xen master] xen/arm: Introduce steps in domain_relinquish_resource

[patchbot@xxxxxxx]

commit 2bfa5c7fdd8e24279f3f1d28f434cfe923565bea
Author:     Julien Grall <julien.grall@xxxxxxxxxx>
AuthorDate: Tue Dec 17 16:27:49 2013 +0000
Commit:     Ian Campbell <ian.campbell@xxxxxxxxxx>
CommitDate: Wed Dec 18 14:21:06 2013 +0000

    xen/arm: Introduce steps in domain_relinquish_resource
    
    In a later patch, a new step will be added. It will avoid to check every 
step
    when the function was preempted.
    
    Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
    Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
 xen/arch/arm/domain.c        |   37 ++++++++++++++++++++++++++++++-------
 xen/include/asm-arm/domain.h |    8 ++++++++
 2 files changed, 38 insertions(+), 7 deletions(-)

diff --git a/xen/arch/arm/domain.c b/xen/arch/arm/domain.c
index 67c65c3..1590708 100644
--- a/xen/arch/arm/domain.c
+++ b/xen/arch/arm/domain.c
@@ -497,6 +497,8 @@ int arch_domain_create(struct domain *d, unsigned int 
domcr_flags)
 {
     int rc;
 
+    d->arch.relmem = RELMEM_not_started;
+
     /* Idle domains do not need this setup */
     if ( is_idle_domain(d) )
         return 0;
@@ -696,15 +698,36 @@ int domain_relinquish_resources(struct domain *d)
 {
     int ret = 0;
 
-    ret = relinquish_memory(d, &d->xenpage_list);
-    if ( ret )
-        return ret;
+    switch ( d->arch.relmem )
+    {
+    case RELMEM_not_started:
+        d->arch.relmem = RELMEM_xen;
+        /* Falltrough */
 
-    ret = relinquish_memory(d, &d->page_list);
-    if ( ret )
-        return ret;
+    case RELMEM_xen:
+        ret = relinquish_memory(d, &d->xenpage_list);
+        if ( ret )
+            return ret;
 
-    return ret;
+        d->arch.relmem = RELMEM_page;
+        /* Fallthrough */
+
+    case RELMEM_page:
+        ret = relinquish_memory(d, &d->page_list);
+        if ( ret )
+            return ret;
+
+        d->arch.relmem = RELMEM_done;
+        /* Fallthrough */
+
+    case RELMEM_done:
+        break;
+
+    default:
+        BUG();
+    }
+
+    return 0;
 }
 
 void arch_dump_domain_info(struct domain *d)
diff --git a/xen/include/asm-arm/domain.h b/xen/include/asm-arm/domain.h
index 0733c5e..53c9895 100644
--- a/xen/include/asm-arm/domain.h
+++ b/xen/include/asm-arm/domain.h
@@ -107,6 +107,14 @@ struct arch_domain
     struct hvm_domain hvm_domain;
     xen_pfn_t *grant_table_gpfn;
 
+    /* Continuable domain_relinquish_resources(). */
+    enum {
+        RELMEM_not_started,
+        RELMEM_xen,
+        RELMEM_page,
+        RELMEM_done,
+    } relmem;
+
     /* Virtual CPUID */
     uint32_t vpidr;
 
--
generated by git-patchbot for /home/xen/git/xen.git#master

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