[PATCH v2 46/94] KVM: arm64: nv: Fold guest's HCR_EL2 configuration into the host's
From: Marc Zyngier <maz@kernel.org>
Date: 2020-02-11 18:00:09
Also in:
kvm, kvmarm
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
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 <maz@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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