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author | Christoffer Dall <christoffer.dall@linaro.org> | 2014-12-12 21:19:23 +0100 |
---|---|---|
committer | Christoffer Dall <christoffer.dall@linaro.org> | 2014-12-15 11:50:42 +0100 |
commit | 05971120fca43e0357789a14b3386bb56eef2201 (patch) | |
tree | e839f7efda57e1d53fa69c90315df4d0775716bf /include/kvm/arm_arch_timer.h | |
parent | ca7d9c829d419c06e450afa5f785d58198c37caa (diff) | |
download | blackbird-op-linux-05971120fca43e0357789a14b3386bb56eef2201.tar.gz blackbird-op-linux-05971120fca43e0357789a14b3386bb56eef2201.zip |
arm/arm64: KVM: Require in-kernel vgic for the arch timers
It is curently possible to run a VM with architected timers support
without creating an in-kernel VGIC, which will result in interrupts from
the virtual timer going nowhere.
To address this issue, move the architected timers initialization to the
time when we run a VCPU for the first time, and then only initialize
(and enable) the architected timers if we have a properly created and
initialized in-kernel VGIC.
When injecting interrupts from the virtual timer to the vgic, the
current setup should ensure that this never calls an on-demand init of
the VGIC, which is the only call path that could return an error from
kvm_vgic_inject_irq(), so capture the return value and raise a warning
if there's an error there.
We also change the kvm_timer_init() function from returning an int to be
a void function, since the function always succeeds.
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'include/kvm/arm_arch_timer.h')
-rw-r--r-- | include/kvm/arm_arch_timer.h | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/include/kvm/arm_arch_timer.h b/include/kvm/arm_arch_timer.h index ad9db6045b2f..b3f45a578344 100644 --- a/include/kvm/arm_arch_timer.h +++ b/include/kvm/arm_arch_timer.h @@ -60,7 +60,8 @@ struct arch_timer_cpu { #ifdef CONFIG_KVM_ARM_TIMER int kvm_timer_hyp_init(void); -int kvm_timer_init(struct kvm *kvm); +void kvm_timer_enable(struct kvm *kvm); +void kvm_timer_init(struct kvm *kvm); void kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu, const struct kvm_irq_level *irq); void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu); @@ -77,11 +78,8 @@ static inline int kvm_timer_hyp_init(void) return 0; }; -static inline int kvm_timer_init(struct kvm *kvm) -{ - return 0; -} - +static inline void kvm_timer_enable(struct kvm *kvm) {} +static inline void kvm_timer_init(struct kvm *kvm) {} static inline void kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu, const struct kvm_irq_level *irq) {} static inline void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu) {} |