redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

arm64: KVM: document kernel object mappings in HYP 

HYP mode has access to some of the kernel pages. Document the
memory mapping and the offset between kernel VA and HYP VA.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
hifive-unleashed-5.1
Marc Zyngier 2013-05-02 14:31:03 +01:00
parent 6394a3ec02
commit aa4a73a0a2
1 changed files with 7 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
Documentation/arm64/memory.txt
View File

@ -73,3 +73,10 @@ Translation table lookup with 64KB pages:
| | +--------------------------> [41:29] L2 index (only 38:29 used)
| +-------------------------------> [47:42] L1 index (not used)
+-------------------------------------------------> [63] TTBR0/1
When using KVM, the hypervisor maps kernel pages in EL2, at a fixed
offset from the kernel VA (top 24bits of the kernel VA set to zero):
Start End Size Use
-----------------------------------------------------------------------
0000004000000000 0000007fffffffff 256GB kernel objects mapped in HYP