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| author | Andrew Jones <drjones@redhat.com> | 2019-04-04 20:42:30 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-25 19:25:35 +0300 |
| commit | ec6035a3a50433458b3358801d68d8e4c1772c7f (patch) | |
| tree | 44dda89a4db7ae112881f234a8d88c28d799e960 /virt | |
| parent | e28b4dc4d3678131d74e15dc662e07ce786f7fa5 (diff) | |
| download | linux-ec6035a3a50433458b3358801d68d8e4c1772c7f.tar.xz | |
KVM: arm/arm64: Ensure vcpu target is unset on reset failure
[ Upstream commit 811328fc3222f7b55846de0cd0404339e2e1e6d7 ]
A failed KVM_ARM_VCPU_INIT should not set the vcpu target,
as the vcpu target is used by kvm_vcpu_initialized() to
determine if other vcpu ioctls may proceed. We need to set
the target before calling kvm_reset_vcpu(), but if that call
fails, we should then unset it and clear the feature bitmap
while we're at it.
Signed-off-by: Andrew Jones <drjones@redhat.com>
[maz: Simplified patch, completed commit message]
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/arm/arm.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c index 32aa88c19b8d..4154f98b337c 100644 --- a/virt/kvm/arm/arm.c +++ b/virt/kvm/arm/arm.c @@ -856,7 +856,7 @@ int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level, static int kvm_vcpu_set_target(struct kvm_vcpu *vcpu, const struct kvm_vcpu_init *init) { - unsigned int i; + unsigned int i, ret; int phys_target = kvm_target_cpu(); if (init->target != phys_target) @@ -891,9 +891,14 @@ static int kvm_vcpu_set_target(struct kvm_vcpu *vcpu, vcpu->arch.target = phys_target; /* Now we know what it is, we can reset it. */ - return kvm_reset_vcpu(vcpu); -} + ret = kvm_reset_vcpu(vcpu); + if (ret) { + vcpu->arch.target = -1; + bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES); + } + return ret; +} static int kvm_arch_vcpu_ioctl_vcpu_init(struct kvm_vcpu *vcpu, struct kvm_vcpu_init *init) |