diff mbox series

[v6,11/17] xen/arm: keep guest still be NUMA unware

Message ID 20231120025431.14845-12-Henry.Wang@arm.com (mailing list archive)
State New, archived
Headers show
Series Device tree based NUMA support for Arm | expand

Commit Message

Henry Wang Nov. 20, 2023, 2:54 a.m. UTC 
From: Wei Chen <wei.chen@arm.com>

The NUMA information provided in the host Device-Tree
are only for Xen. For dom0, we want to hide them as they
may be different (for now, dom0 is still not aware of NUMA)
The CPU and memory nodes are recreated from scratch for the
domain. So we already skip the "numa-node-id" property for
these two types of nodes.

However, some devices like PCIe may have "numa-node-id"
property too. We have to skip them as well.

Signed-off-by: Wei Chen <wei.chen@arm.com>
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
---
v5 -> v6:
- Rebase on top of staging without code changes.
v1 -> v5:
- Add Rb
---
 xen/arch/arm/domain_build.c | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox series

Patch

diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index 2dd2926b41..b738d16a40 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -1209,6 +1209,10 @@  static int __init write_properties(struct domain *d, struct kernel_info *kinfo,
                 continue;
         }
 
+        /* Dom0 is currently NUMA unaware */
+        if ( dt_property_name_is_equal(prop, "numa-node-id") )
+            continue;
+
         res = fdt_property(kinfo->fdt, prop->name, prop_data, prop_len);
 
         if ( res )
@@ -2322,6 +2326,8 @@  static int __init handle_node(struct domain *d, struct kernel_info *kinfo,
         DT_MATCH_TYPE("memory"),
         /* The memory mapped timer is not supported by Xen. */
         DT_MATCH_COMPATIBLE("arm,armv7-timer-mem"),
+        /* Numa info doesn't need to be exposed to Domain-0 */
+        DT_MATCH_COMPATIBLE("numa-distance-map-v1"),
         { /* sentinel */ },
     };
     static const struct dt_device_match timer_matches[] __initconst =