diff options
| author | Andre Przywara <andre.przywara@arm.com> | 2014-04-11 00:07:18 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-05-17 09:53:52 -0700 |
| commit | 45d0f76288a2459fe662ec50d804f304bc4bf73d (patch) | |
| tree | f050ae75da4987fab06eebfdced695e6347bdd09 | |
| parent | 89f7e2b26c71280335352086e4085fc29704815d (diff) | |
| download | lwn-45d0f76288a2459fe662ec50d804f304bc4bf73d.tar.gz lwn-45d0f76288a2459fe662ec50d804f304bc4bf73d.zip | |
KVM: arm/arm64: vgic: fix GICD_ICFGR register accesses
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>
| -rw-r--r-- | virt/kvm/arm/vgic.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c index 26954a7d9b03..2f8aee59a8fe 100644 --- a/virt/kvm/arm/vgic.c +++ b/virt/kvm/arm/vgic.c @@ -548,11 +548,10 @@ static bool handle_mmio_cfg_reg(struct kvm_vcpu *vcpu, 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 kvm_vcpu *vcpu, 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 { |