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authorMarc Zyngier <marc.zyngier@arm.com>2018-12-06 17:31:21 +0000
committerWill Deacon <will.deacon@arm.com>2018-12-10 11:58:48 +0000
commitbfae1b98ef0baeac1b724ef890cc75f77eccbdd9 (patch)
tree53f157cbbb7830b1a09fef9cab3eb2deb43428a2 /arch/arm64/kvm/hyp
parent33e5f4e50917c2508c05898f391a971b15eec93e (diff)
downloadlinux-bfae1b98ef0baeac1b724ef890cc75f77eccbdd9.tar.bz2
arm64: KVM: Install stage-2 translation before enabling traps
It is a bit odd that we only install stage-2 translation after having cleared HCR_EL2.TGE, which means that there is a window during which AT requests could fail as stage-2 is not configured yet. Let's move stage-2 configuration before we clear TGE, making the guest entry sequence clearer: we first configure all the guest stuff, then only switch to the guest translation regime. While we're at it, do the same thing for !VHE. It doesn't hurt, and keeps things symmetric. Acked-by: Christoffer Dall <christoffer.dall@arm.com> Reviewed-by: James Morse <james.morse@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/kvm/hyp')
-rw-r--r--arch/arm64/kvm/hyp/switch.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c
index 7cc175c88a37..a8fa61c68c32 100644
--- a/arch/arm64/kvm/hyp/switch.c
+++ b/arch/arm64/kvm/hyp/switch.c
@@ -499,8 +499,8 @@ int kvm_vcpu_run_vhe(struct kvm_vcpu *vcpu)
sysreg_save_host_state_vhe(host_ctxt);
- __activate_traps(vcpu);
__activate_vm(vcpu->kvm);
+ __activate_traps(vcpu);
sysreg_restore_guest_state_vhe(guest_ctxt);
__debug_switch_to_guest(vcpu);
@@ -545,8 +545,8 @@ int __hyp_text __kvm_vcpu_run_nvhe(struct kvm_vcpu *vcpu)
__sysreg_save_state_nvhe(host_ctxt);
- __activate_traps(vcpu);
__activate_vm(kern_hyp_va(vcpu->kvm));
+ __activate_traps(vcpu);
__hyp_vgic_restore_state(vcpu);
__timer_enable_traps(vcpu);