Patch "KVM: arm/arm64: vgic: fix GICD_ICFGR register accesses" has been added to the 3.14-stable tree

Patch "KVM: arm/arm64: vgic: fix GICD_ICFGR register accesses" has been added to the 3.14-stable tree

[gregkh]

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

    KVM: arm/arm64: vgic: fix GICD_ICFGR register accesses

to the 3.14-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-fix-gicd_icfgr-register-accesses.patch
and it can be found in the queue-3.14 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 f2ae85b2ab3776b9e4e42e5b6fa090f40d396794 Mon Sep 17 00:00:00 2001
From: Andre Przywara <andre.przywara@arm.com>
Date: Fri, 11 Apr 2014 00:07:18 +0200
Subject: KVM: arm/arm64: vgic: fix GICD_ICFGR register accesses

From: Andre Przywara <andre.przywara@arm.com>

commit f2ae85b2ab3776b9e4e42e5b6fa090f40d396794 upstream.

Since KVM internally represents the ICFGR registers by stuffing two
of them into one word, the offset for accessing the internal
representation and the one for the MMIO based access are different.
So keep the original offset around, but adjust the internal array
offset by one bit.

Reported-by: Haibin Wang <wanghaibin.wang@huawei.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Cc: Shannon Zhao <shannon.zhao@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 virt/kvm/arm/vgic.c |    9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

--- a/virt/kvm/arm/vgic.c
+++ b/virt/kvm/arm/vgic.c
@@ -548,11 +548,10 @@ static bool handle_mmio_cfg_reg(struct k
 	u32 val;
 	u32 *reg;
 
-	offset >>= 1;
 	reg = vgic_bitmap_get_reg(&vcpu->kvm->arch.vgic.irq_cfg,
-				  vcpu->vcpu_id, offset);
+				  vcpu->vcpu_id, offset >> 1);
 
-	if (offset & 2)
+	if (offset & 4)
 		val = *reg >> 16;
 	else
 		val = *reg & 0xffff;
@@ -561,13 +560,13 @@ static bool handle_mmio_cfg_reg(struct k
 	vgic_reg_access(mmio, &val, offset,
 			ACCESS_READ_VALUE | ACCESS_WRITE_VALUE);
 	if (mmio->is_write) {
-		if (offset < 4) {
+		if (offset < 8) {
 			*reg = ~0U; /* Force PPIs/SGIs to 1 */
 			return false;
 		}
 
 		val = vgic_cfg_compress(val);
-		if (offset & 2) {
+		if (offset & 4) {
 			*reg &= 0xffff;
 			*reg |= val << 16;
 		} else {


Patches currently in stable-queue which might be from andre.przywara@arm.com are

queue-3.14/kvm-arm-arm64-vgic-fix-gicd_icfgr-register-accesses.patch