XEN configures stage-2 page table to expose 40 bits of IPA
(Intermediate Physical Address) bits for systems with 42 bits of PA
(Physical Address). This setting prevents the 42-bit PA systems from booting
DOM0's kernel since access above 40 bits results in a fault.
This patch adds support for 42-bit system
which has a full 42-bit address range.
The fix will allocate 8 pages for stage 2 mapping for both DOM0 and guests.
It is a bit wasteful but not an issue since most of these systems should have
sufficiently large memory capacity.
Signed-off-by: Feng Kan <feng...@os.amperecomputing.com>
Signed-off-by: Vishnu <vis...@os.amperecomputing.com>
---
xen/arch/arm/p2m.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
index 92c2413..7712991 100644
--- a/xen/arch/arm/p2m.c
+++ b/xen/arch/arm/p2m.c
@@ -1995,7 +1995,7 @@ void __init setup_virt_paging(void)
[0] = { 32, 32/*32*/, 0, 1 },
[1] = { 36, 28/*28*/, 0, 1 },
[2] = { 40, 24/*24*/, 1, 1 },
- [3] = { 42, 24/*22*/, 1, 1 },
+ [3] = { 42, 22/*22*/, 3, 1 },
[4] = { 44, 20/*20*/, 0, 2 },
[5] = { 48, 16/*16*/, 0, 2 },
[6] = { 0 }, /* Invalid */
--
1.8.3.1
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