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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
This commit is contained in:
Quentin Perret 2022-11-10 19:02:56 +00:00 committed by Marc Zyngier
parent 73f38ef2ae
commit 27eb26bfff
1 changed files with 5 additions and 0 deletions
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5
arch/arm64/kvm/hyp/nvhe/setup.c
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@ -161,6 +161,11 @@ static int recreate_hyp_mappings(phys_addr_t phys, unsigned long size,
if (ret)
return ret;
ret = pkvm_create_mappings(&kvm_vgic_global_state,
&kvm_vgic_global_state + 1, prot);
if (ret)
return ret;
return 0;
}