Kernel/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-01-09 23:00:21 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

arm64: KVM: document kernel object mappings in HYP

Browse Source 
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>
This commit is contained in:
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) | | +--------------------------> [41:29] L2 index (only 38:29 used)
| +-------------------------------> [47:42] L1 index (not used) | +-------------------------------> [47:42] L1 index (not used)
+-------------------------------------------------> [63] TTBR0/1 +-------------------------------------------------> [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