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>
+ <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'/>
--
2.7.4