[libvirt] [PATCH] cpu: Add support for al57 Intel features

Shaohe Feng shaohe.feng at intel.com
Sun Dec 17 23:02:44 UTC 2017

We can start qemu with a "cpu,+la57" to set 57-bit vitrual address
space. So VM can be aware that it need to enable 5-level paging.

Corresponding QEMU commits:
        al57 6c7c3c21f95dd9af8a0691c0dd29b07247984122
 src/cpu/cpu_map.xml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/cpu/cpu_map.xml b/src/cpu/cpu_map.xml
index e5da7a8..922a195 100644
--- a/src/cpu/cpu_map.xml
+++ b/src/cpu/cpu_map.xml
@@ -285,6 +285,9 @@
     <feature name='ospke'>
       <cpuid eax_in='0x07' ecx_in='0x00' ecx='0x00000010'/>
+    <feature name='la57'>
+      <cpuid eax_in='0x07' ecx_in='0x00' ecx='0x00010000'/>
+    </feature>
     <feature name='avx512-4vnniw'>
       <cpuid eax_in='0x07' ecx_in='0x00' edx='0x00000004'/>

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