Patch "KVM: arm/arm64: vgic-v2: Clear all dirty LRs" has been added to the 4.6-stable tree

Patch "KVM: arm/arm64: vgic-v2: Clear all dirty LRs" has been added to the 4.6-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    KVM: arm/arm64: vgic-v2: Clear all dirty LRs

to the 4.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     kvm-arm-arm64-vgic-v2-clear-all-dirty-lrs.patch
and it can be found in the queue-4.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 4d3afc9bad2b67b118a0cc204dc94703f7a44e74 Mon Sep 17 00:00:00 2001
From: Christoffer Dall <christoffer.dall@linaro.org>
Date: Wed, 25 May 2016 15:26:33 +0100
Subject: KVM: arm/arm64: vgic-v2: Clear all dirty LRs

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));
 	}
 }


Patches currently in stable-queue which might be from christoffer.dall@linaro.org are

queue-4.6/kvm-arm-arm64-vgic-v2-clear-all-dirty-lrs.patch
queue-4.6/kvm-arm-arm64-vgic-v3-clear-all-dirty-lrs.patch