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authorChristoffer Dall <christoffer.dall@linaro.org>2017-11-29 18:37:53 +0300
committerMarc Zyngier <marc.zyngier@arm.com>2018-03-19 13:53:09 +0300
commit829a58635497d7cc668133ac17daca9b78652661 (patch)
treed77048bc816c717a2d73dd0a4d724145e64e955f /virt
parent7a364bd5db1cfba50f3bde115db0dadc31b0169b (diff)
downloadlinux-829a58635497d7cc668133ac17daca9b78652661.tar.xz
KVM: arm/arm64: Move vcpu_load call after kvm_vcpu_first_run_init
Moving the call to vcpu_load() in kvm_arch_vcpu_ioctl_run() to after we've called kvm_vcpu_first_run_init() simplifies some of the vgic and there is also no need to do vcpu_load() for things such as handling the immediate_exit flag. Reviewed-by: Julien Grall <julien.grall@arm.com> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/arm/arch_timer.c4
-rw-r--r--virt/kvm/arm/arm.c22
-rw-r--r--virt/kvm/arm/vgic/vgic-init.c11
3 files changed, 8 insertions, 29 deletions
diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c
index 86eca32474cc..7dd8d9677dc5 100644
--- a/virt/kvm/arm/arch_timer.c
+++ b/virt/kvm/arm/arch_timer.c
@@ -842,11 +842,7 @@ int kvm_timer_enable(struct kvm_vcpu *vcpu)
return ret;
no_vgic:
- preempt_disable();
timer->enabled = 1;
- kvm_timer_vcpu_load(vcpu);
- preempt_enable();
-
return 0;
}
diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c
index 53572304843b..932e61858c55 100644
--- a/virt/kvm/arm/arm.c
+++ b/virt/kvm/arm/arm.c
@@ -632,27 +632,22 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
if (unlikely(!kvm_vcpu_initialized(vcpu)))
return -ENOEXEC;
- vcpu_load(vcpu);
-
ret = kvm_vcpu_first_run_init(vcpu);
if (ret)
- goto out;
+ return ret;
if (run->exit_reason == KVM_EXIT_MMIO) {
ret = kvm_handle_mmio_return(vcpu, vcpu->run);
if (ret)
- goto out;
- if (kvm_arm_handle_step_debug(vcpu, vcpu->run)) {
- ret = 0;
- goto out;
- }
-
+ return ret;
+ if (kvm_arm_handle_step_debug(vcpu, vcpu->run))
+ return 0;
}
- if (run->immediate_exit) {
- ret = -EINTR;
- goto out;
- }
+ if (run->immediate_exit)
+ return -EINTR;
+
+ vcpu_load(vcpu);
kvm_sigset_activate(vcpu);
@@ -811,7 +806,6 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
kvm_sigset_deactivate(vcpu);
-out:
vcpu_put(vcpu);
return ret;
}
diff --git a/virt/kvm/arm/vgic/vgic-init.c b/virt/kvm/arm/vgic/vgic-init.c
index 743ca5cb05ef..3e8209a07585 100644
--- a/virt/kvm/arm/vgic/vgic-init.c
+++ b/virt/kvm/arm/vgic/vgic-init.c
@@ -302,17 +302,6 @@ int vgic_init(struct kvm *kvm)
dist->initialized = true;
- /*
- * If we're initializing GICv2 on-demand when first running the VCPU
- * then we need to load the VGIC state onto the CPU. We can detect
- * this easily by checking if we are in between vcpu_load and vcpu_put
- * when we just initialized the VGIC.
- */
- preempt_disable();
- vcpu = kvm_arm_get_running_vcpu();
- if (vcpu)
- kvm_vgic_load(vcpu);
- preempt_enable();
out:
return ret;
}