KVM: arm64: Explicitly map 'kvm_vgic_global_state' at EL2
The pkvm hypervisor at EL2 may need to read the 'kvm_vgic_global_state' variable from the host, for example when saving and restoring the state of the virtual GIC. Explicitly map 'kvm_vgic_global_state' in the stage-1 page-table of the pKVM hypervisor rather than relying on mapping all of the host '.rodata' section. Tested-by: Vincent Donnefort <vdonnefort@google.com> Signed-off-by: Quentin Perret <qperret@google.com> Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20221110190259.26861-24-will@kernel.org
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@ -161,6 +161,11 @@ static int recreate_hyp_mappings(phys_addr_t phys, unsigned long size,
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if (ret)
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return ret;
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ret = pkvm_create_mappings(&kvm_vgic_global_state,
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&kvm_vgic_global_state + 1, prot);
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if (ret)
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return ret;
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return 0;
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}
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