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| author | Christoffer Dall <christoffer.dall@linaro.org> | 2017-08-04 13:47:18 +0200 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2018-03-19 10:53:19 +0000 |
| commit | a2465629b62a82b3145dc7ef40ec6c32432cf002 (patch) | |
| tree | e39e588a883ac6e565a9b8214c3e79ef3351c4be /arch/arm64/kvm/hyp/sysreg-sr.c | |
| parent | c16c1131fb1ccc70aac351111388bf23a97024ca (diff) | |
| download | linux-a2465629b62a82b3145dc7ef40ec6c32432cf002.tar.gz linux-a2465629b62a82b3145dc7ef40ec6c32432cf002.tar.bz2 linux-a2465629b62a82b3145dc7ef40ec6c32432cf002.zip | |
KVM: arm64: Configure c15, PMU, and debug register traps on cpu load/put for VHE
We do not have to change the c15 trap setting on each switch to/from the
guest on VHE systems, because this setting only affects guest EL1/EL0
(and therefore not the VHE host).
The PMU and debug trap configuration can also be done on vcpu load/put
instead, because they don't affect how the VHE host kernel can access the
debug registers while executing KVM kernel code.
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm64/kvm/hyp/sysreg-sr.c')
| -rw-r--r-- | arch/arm64/kvm/hyp/sysreg-sr.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm64/kvm/hyp/sysreg-sr.c b/arch/arm64/kvm/hyp/sysreg-sr.c index aacba4636871..b3894df6bf1a 100644 --- a/arch/arm64/kvm/hyp/sysreg-sr.c +++ b/arch/arm64/kvm/hyp/sysreg-sr.c @@ -254,6 +254,8 @@ void kvm_vcpu_load_sysregs(struct kvm_vcpu *vcpu) __sysreg_restore_el1_state(guest_ctxt); vcpu->arch.sysregs_loaded_on_cpu = true; + + activate_traps_vhe_load(vcpu); } /** @@ -275,6 +277,8 @@ void kvm_vcpu_put_sysregs(struct kvm_vcpu *vcpu) if (!has_vhe()) return; + deactivate_traps_vhe_put(); + __sysreg_save_el1_state(guest_ctxt); __sysreg_save_user_state(guest_ctxt); __sysreg32_save_state(vcpu); |