UPSTREAM: 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.

BUG=chromium:846515
TEST=build/boot on hana with USE=kvm_host

Change-Id: Ie9f0d8ef31c3910d442b79d98e368d4b395858a3
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>
(cherry picked from commit c2f58514cfb374d5368c9da945f1765cd48eb0da)
Signed-off-by: Sonny Rao <sonnyrao@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1088119
1 file changed