| Message ID | 1368540840-26750-33-git-send-email-marc.zyngier@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, May 14, 2013 at 03:14:00PM +0100, Marc Zyngier wrote: > HYP mode has access to some of the kernel pages. Document the > memory mapping and the offset between kernel VA and HYP VA. > > Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
diff --git a/Documentation/arm64/memory.txt b/Documentation/arm64/memory.txt index 5f583af..78a37712 100644 --- a/Documentation/arm64/memory.txt +++ b/Documentation/arm64/memory.txt @@ -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
HYP mode has access to some of the kernel pages. Document the memory mapping and the offset between kernel VA and HYP VA. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> --- Documentation/arm64/memory.txt | 7 +++++++ 1 file changed, 7 insertions(+)