| Message ID | 20170923004207.22356-14-cdall@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 23/09/17 01:42, Christoffer Dall wrote: > As we are about to take physical interrupts for the virtual timer on the > host but want to leave those active while running the VM (and let the VM > deactivate them), we need to set the vtimer PPI affinity accordingly. > > Signed-off-by: Christoffer Dall <cdall@linaro.org> > --- > virt/kvm/arm/arch_timer.c | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c > index 4254f88..4275f8f 100644 > --- a/virt/kvm/arm/arch_timer.c > +++ b/virt/kvm/arm/arch_timer.c > @@ -650,11 +650,20 @@ int kvm_timer_hyp_init(void) > return err; > } > > + err = irq_set_vcpu_affinity(host_vtimer_irq, kvm_get_running_vcpus()); > + if (err) { > + kvm_err("kvm_arch_timer: error setting vcpu affinity\n"); > + goto out_free_irq; > + } > + > kvm_info("virtual timer IRQ%d\n", host_vtimer_irq); > > cpuhp_setup_state(CPUHP_AP_KVM_ARM_TIMER_STARTING, > "kvm/arm/timer:starting", kvm_timer_starting_cpu, > kvm_timer_dying_cpu); > + return 0; > +out_free_irq: > + free_percpu_irq(host_vtimer_irq, kvm_get_running_vcpus()); > return err; > } > > Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> M.
diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c index 4254f88..4275f8f 100644 --- a/virt/kvm/arm/arch_timer.c +++ b/virt/kvm/arm/arch_timer.c @@ -650,11 +650,20 @@ int kvm_timer_hyp_init(void) return err; } + err = irq_set_vcpu_affinity(host_vtimer_irq, kvm_get_running_vcpus()); + if (err) { + kvm_err("kvm_arch_timer: error setting vcpu affinity\n"); + goto out_free_irq; + } + kvm_info("virtual timer IRQ%d\n", host_vtimer_irq); cpuhp_setup_state(CPUHP_AP_KVM_ARM_TIMER_STARTING, "kvm/arm/timer:starting", kvm_timer_starting_cpu, kvm_timer_dying_cpu); + return 0; +out_free_irq: + free_percpu_irq(host_vtimer_irq, kvm_get_running_vcpus()); return err; }
As we are about to take physical interrupts for the virtual timer on the host but want to leave those active while running the VM (and let the VM deactivate them), we need to set the vtimer PPI affinity accordingly. Signed-off-by: Christoffer Dall <cdall@linaro.org> --- virt/kvm/arm/arch_timer.c | 9 +++++++++ 1 file changed, 9 insertions(+)