[PATCH 4.6 27/81] KVM: arm/arm64: vgic-v2: Clear all dirty LRs

Greg Kroah-Hartman
2016-06-22T23:02:36Z

From: Christoffer Dall <christoffer.dall@linaro.org>

commit 4d3afc9bad2b67b118a0cc204dc94703f7a44e74 upstream.

When saving the state of the list registers, it is critical to
reset them zero, as we could otherwise leave unexpected EOI
interrupts pending for virtual level interrupts.

Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
virt/kvm/arm/hyp/vgic-v2-sr.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)

--- a/virt/kvm/arm/hyp/vgic-v2-sr.c
+++ b/virt/kvm/arm/hyp/vgic-v2-sr.c
@@ -93,12 +93,11 @@ static void __hyp_text save_lrs(struct k
if (!(vcpu->arch.vgic_cpu.live_lrs & (1UL << i)))
continue;

- if (cpu_if->vgic_elrsr & (1UL << i)) {
+ if (cpu_if->vgic_elrsr & (1UL << i))
cpu_if->vgic_lr[i] &= ~GICH_LR_STATE;
- continue;
- }
+ else
+ cpu_if->vgic_lr[i] = readl_relaxed(base + GICH_LR0 + (i * 4));

- cpu_if->vgic_lr[i] = readl_relaxed(base + GICH_LR0 + (i * 4));
writel_relaxed(0, base + GICH_LR0 + (i * 4));
}
}