When entering a L2 guest (nested virt enabled, but not in hypervisor
context), we need to honor the traps the L1 guest has asked enabled.
For now, just OR the guest's HCR_EL2 into the host's. We may have to do
some filtering in the future though.
Signed-off-by: Marc Zyngier <m...@kernel.org>
---
arch/arm64/kvm/hyp/switch.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c
index 57e6e848b7a7..43e3a60915b1 100644
--- a/arch/arm64/kvm/hyp/switch.c
+++ b/arch/arm64/kvm/hyp/switch.c
@@ -192,6 +192,8 @@ static void __hyp_text __activate_traps(struct kvm_vcpu
*vcpu)
if (!vcpu_el2_tge_is_set(vcpu))
hcr |= HCR_AT | HCR_TTLB;
}
+ } else if (nested_virt_in_use(vcpu)) {
+ hcr |= __vcpu_sys_reg(vcpu, HCR_EL2);
}
write_sysreg(hcr, hcr_el2);
--
2.20.1
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