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KVM: arm64: Move debug dirty flag calculation out of world switch

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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>
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>
This commit is contained in:
Christoffer Dall
2017-10-10 19:31:33 +02:00
committed by Marc Zyngier
parent e72341c512
commit 54ceb1bcf8
2 changed files with 5 additions and 6 deletions
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6
arch/arm64/kvm/hyp/debug-sr.c
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@@ -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);