Messages in this thread Patch in this message | | | Date | Mon, 19 Jul 2021 11:47:26 +0100 | Subject | [PATCH 05/14] KVM: arm64: Don't overwrite ignored bits with owner id | From | Quentin Perret <> |
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The nVHE protected mode uses invalid mappings in the host stage-2 page-table to track the owner of each page in the system. In order to allow the usage of ignored bits (a.k.a. software bits) in these mappings, move the owner encoding away from the top bits.
Signed-off-by: Quentin Perret <qperret@google.com> --- arch/arm64/kvm/hyp/pgtable.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/kvm/hyp/pgtable.c b/arch/arm64/kvm/hyp/pgtable.c index a60653cbd8e5..a0ac8c2bc174 100644 --- a/arch/arm64/kvm/hyp/pgtable.c +++ b/arch/arm64/kvm/hyp/pgtable.c @@ -50,7 +50,7 @@ KVM_PTE_LEAF_ATTR_LO_S2_S2AP_W | \ KVM_PTE_LEAF_ATTR_HI_S2_XN) -#define KVM_INVALID_PTE_OWNER_MASK GENMASK(63, 56) +#define KVM_INVALID_PTE_OWNER_MASK GENMASK(9, 2) #define KVM_MAX_OWNER_ID 1 struct kvm_pgtable_walk_data { -- 2.32.0.402.g57bb445576-goog
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