[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] [RFC PATCH v3 17/24] ARM: NUMA: DT: Do not expose numa info to DOM0



Hi,

On 18/07/17 12:41, vijay.kilari@xxxxxxxxx wrote:
From: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxx>

Delete numa-node-id and distance map from DOM0 DT
so that NUMA information is not exposed to DOM0.
This helps particularly to boot Node 1 devices
as if booting on Node0.

However this approach has limitation where memory allocation
for the devices should be local.

Also, do not expose numa distance node to DOM0.

Signed-off-by: Vijaya Kumar <Vijaya.Kumar@xxxxxxxxxx>
---
 xen/arch/arm/domain_build.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index 1bec4fa..a7d6d3a 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -425,6 +425,10 @@ static int write_properties(struct domain *d, struct 
kernel_info *kinfo,
             }
         }

+        /* Don't expose the property numa to the guest */

s/numa/NUMA/ and missing full stop.

+        if ( dt_property_name_is_equal(prop, "numa-node-id") )
+            continue;
+
         /* Don't expose the property "xen,passthrough" to the guest */
         if ( dt_property_name_is_equal(prop, "xen,passthrough") )
             continue;
@@ -1177,6 +1181,11 @@ static int 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 is not exposed to Dom0.

Please use the term "hardware domain" and not Dom0 in new code.

+         * So, skip distance-map infomation

s/infomation/information/ and missing full stop.

+         */
+        DT_MATCH_COMPATIBLE("numa-distance-map-v1"),
         { /* sentinel */ },
     };
     static const struct dt_device_match timer_matches[] __initconst =


Cheers,

--
Julien Grall

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel

 


Rackspace

Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.