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| author |   Christoffer Dall <christoffer.dall@linaro.org> | 2017-10-10 19:31:33 +0200 |
|---|---|---|
| committer |   Marc Zyngier <marc.zyngier@arm.com> | 2018-03-19 10:53:11 +0000 |
| commit | 54ceb1bcf8d83e835be515d7d9e4129a73d80f4e (patch) | |
| tree | a6de80182aa512c1c5d9c9176ff365093bb26d0a /arch/arm64/kvm/debug.c | |
| parent | KVM: arm/arm64: Introduce vcpu_el1_is_32bit (diff) | |
| download | linux-dev-54ceb1bcf8d83e835be515d7d9e4129a73d80f4e.tar.xz linux-dev-54ceb1bcf8d83e835be515d7d9e4129a73d80f4e.zip | |
KVM: arm64: Move debug dirty flag calculation out of world switch
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>
Diffstat (limited to 'arch/arm64/kvm/debug.c')
| -rw-r--r-- | arch/arm64/kvm/debug.c | 5 |
1 files changed, 5 insertions, 0 deletions
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)); } |