diff mbox series

[v4,23/25] KVM: arm64: Explicitly map 'kvm_vgic_global_state' at EL2

Message ID 20221017115209.2099-24-will@kernel.org (mailing list archive)
State New, archived
Headers show
Series KVM: arm64: Introduce pKVM hyp VM and vCPU state at EL2 | expand

Commit Message

Will Deacon Oct. 17, 2022, 11:52 a.m. UTC 
From: Quentin Perret <qperret@google.com>

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>
---
 arch/arm64/kvm/hyp/nvhe/setup.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/arch/arm64/kvm/hyp/nvhe/setup.c b/arch/arm64/kvm/hyp/nvhe/setup.c
index 0f69c1393416..5a371ab236db 100644
--- a/arch/arm64/kvm/hyp/nvhe/setup.c
+++ b/arch/arm64/kvm/hyp/nvhe/setup.c
@@ -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;
 }