[PATCH v4 08/11] xen/arm: use colored allocator for p2m page tables

[Carlo Nonato]

Cache colored domains can benefit from having p2m page tables allocated
with the same coloring schema so that isolation can be achieved also for
those kind of memory accesses.
In order to do that, the domain struct is passed to the allocator and the
MEMF_no_owner flag is used.

Signed-off-by: Carlo Nonato <carlo.non...@minervasys.tech>
Signed-off-by: Marco Solieri <marco.soli...@minervasys.tech>
---
v4:
- fixed p2m page allocation using MEMF_no_owner memflag
---
 xen/arch/arm/p2m.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
index 948f199d84..f9faeb61af 100644
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -4,6 +4,7 @@
 #include <xen/iocap.h>
 #include <xen/ioreq.h>
 #include <xen/lib.h>
+#include <xen/llc_coloring.h>
 #include <xen/sched.h>
 #include <xen/softirq.h>
 
@@ -56,7 +57,10 @@ static struct page_info *p2m_alloc_page(struct domain *d)
      */
     if ( is_hardware_domain(d) )
     {
-        pg = alloc_domheap_page(NULL, 0);
+        if ( is_domain_llc_colored(d) )
+            pg = alloc_domheap_page(d, MEMF_no_owner);
+        else
+            pg = alloc_domheap_page(NULL, 0);
         if ( pg == NULL )
             printk(XENLOG_G_ERR "Failed to allocate P2M pages for hwdom.\n");
     }
@@ -105,7 +109,10 @@ int p2m_set_allocation(struct domain *d, unsigned long 
pages, bool *preempted)
         if ( d->arch.paging.p2m_total_pages < pages )
         {
             /* Need to allocate more memory from domheap */
-            pg = alloc_domheap_page(NULL, 0);
+            if ( is_domain_llc_colored(d) )
+                pg = alloc_domheap_page(d, MEMF_no_owner);
+            else
+                pg = alloc_domheap_page(NULL, 0);
             if ( pg == NULL )
             {
                 printk(XENLOG_ERR "Failed to allocate P2M pages.\n");
-- 
2.34.1