| Message ID | 20180215210332.8648-10-christoffer.dall@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Thu, Feb 15, 2018 at 10:03:01PM +0100, Christoffer Dall wrote: > There is no need to figure out inside the world-switch if we should > save/restore the debug registers or not, we might as well do that in the > higher level debug setup code, making it easier to optimize down the > line. > > Reviewed-by: Julien Thierry <julien.thierry@arm.com> > Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> > Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org> > --- > arch/arm64/kvm/debug.c | 5 +++++ > arch/arm64/kvm/hyp/debug-sr.c | 6 ------ > 2 files changed, 5 insertions(+), 6 deletions(-) > Reviewed-by: Andrew Jones <drjones@redhat.com>
diff --git a/arch/arm64/kvm/debug.c b/arch/arm64/kvm/debug.c index fa63b28c65e0..feedb877cff8 100644 --- a/arch/arm64/kvm/debug.c +++ b/arch/arm64/kvm/debug.c @@ -193,6 +193,11 @@ void kvm_arm_setup_debug(struct kvm_vcpu *vcpu) if (trap_debug) vcpu->arch.mdcr_el2 |= MDCR_EL2_TDA; + /* If KDE or MDE are set, perform a full save/restore cycle. */ + if ((vcpu_sys_reg(vcpu, MDSCR_EL1) & DBG_MDSCR_KDE) || + (vcpu_sys_reg(vcpu, MDSCR_EL1) & DBG_MDSCR_MDE)) + vcpu->arch.debug_flags |= KVM_ARM64_DEBUG_DIRTY; + trace_kvm_arm_set_dreg32("MDCR_EL2", vcpu->arch.mdcr_el2); trace_kvm_arm_set_dreg32("MDSCR_EL1", vcpu_sys_reg(vcpu, MDSCR_EL1)); } diff --git a/arch/arm64/kvm/hyp/debug-sr.c b/arch/arm64/kvm/hyp/debug-sr.c index dabb5cc7b087..d958cd63a547 100644 --- a/arch/arm64/kvm/hyp/debug-sr.c +++ b/arch/arm64/kvm/hyp/debug-sr.c @@ -166,12 +166,6 @@ void __hyp_text __debug_restore_state(struct kvm_vcpu *vcpu, void __hyp_text __debug_cond_save_host_state(struct kvm_vcpu *vcpu) { - /* If any of KDE, MDE or KVM_ARM64_DEBUG_DIRTY is set, perform - * a full save/restore cycle. */ - if ((vcpu->arch.ctxt.sys_regs[MDSCR_EL1] & DBG_MDSCR_KDE) || - (vcpu->arch.ctxt.sys_regs[MDSCR_EL1] & DBG_MDSCR_MDE)) - vcpu->arch.debug_flags |= KVM_ARM64_DEBUG_DIRTY; - __debug_save_state(vcpu, &vcpu->arch.host_debug_state.regs, kern_hyp_va(vcpu->arch.host_cpu_context)); __debug_save_spe()(&vcpu->arch.host_debug_state.pmscr_el1);