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authorPavel Fedin <p.fedin@samsung.com>2015-08-05 10:53:57 (GMT)
committerMarc Zyngier <marc.zyngier@arm.com>2015-09-16 17:35:28 (GMT)
commitc2f58514cfb374d5368c9da945f1765cd48eb0da (patch)
treebb3be06d91183f5dc8ff0dce7040e3b5589bdab1 /arch/arm/kvm/arm.c
parentca09f02f122b2ecb0f5ddfc5fd47b29ed657d4fd (diff)
downloadlinux-c2f58514cfb374d5368c9da945f1765cd48eb0da.tar.xz
arm/arm64: KVM: vgic: Check for !irqchip_in_kernel() when mapping resources
Until b26e5fdac43c ("arm/arm64: KVM: introduce per-VM ops"), kvm_vgic_map_resources() used to include a check on irqchip_in_kernel(), and vgic_v2_map_resources() still has it. But now vm_ops are not initialized until we call kvm_vgic_create(). Therefore kvm_vgic_map_resources() can being called without a VGIC, and we die because vm_ops.map_resources is NULL. Fixing this restores QEMU's kernel-irqchip=off option to a working state, allowing to use GIC emulation in userspace. Fixes: b26e5fdac43c ("arm/arm64: KVM: introduce per-VM ops") Cc: stable@vger.kernel.org Signed-off-by: Pavel Fedin <p.fedin@samsung.com> [maz: reworked commit message] Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm/kvm/arm.c')
-rw-r--r--arch/arm/kvm/arm.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index ce404a5..dc017ad 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -446,7 +446,7 @@ static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu)
* Map the VGIC hardware resources before running a vcpu the first
* time on this VM.
*/
- if (unlikely(!vgic_ready(kvm))) {
+ if (unlikely(irqchip_in_kernel(kvm) && !vgic_ready(kvm))) {
ret = kvm_vgic_map_resources(kvm);
if (ret)
return ret;