[PATCH 05/14] KVM: arm64: Don't overwrite ignored bits with owner id
From: Quentin Perret <hidden>
Date: 2021-07-19 10:48:02
Also in:
kvmarm, lkml
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
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 <redacted> --- 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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