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authorChristoffer Dall <christoffer.dall@linaro.org>2013-08-29 11:08:24 +0100
committerGleb Natapov <gleb@redhat.com>2013-08-30 16:12:38 +0300
commit8d98915b6bda499e47d19166101d0bbcfd409c80 (patch)
tree62da4eebd0391acff74af87586dce14e7852942b /virt
parent6545eae3d7a1b6dc2edb8ede9107998aee1207ef (diff)
downloadlinux-8d98915b6bda499e47d19166101d0bbcfd409c80.tar.gz
ARM: KVM: Bugfix: vgic_bytemap_get_reg per cpu regs
For bytemaps each IRQ field is 1 byte wide, so we pack 4 irq fields in one word and since there are 32 private (per cpu) irqs, we have 8 private u32 fields on the vgic_bytemap struct. We shift the offset from the base of the register group right by 2, giving us the word index instead of the field index. But then there are 8 private words, not 4, which is also why we subtract 8 words from the offset of the shared words. Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Gleb Natapov <gleb@redhat.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/arm/vgic.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c
index 902789ff4ab..685fc72fc75 100644
--- a/virt/kvm/arm/vgic.c
+++ b/virt/kvm/arm/vgic.c
@@ -149,7 +149,7 @@ static u32 *vgic_bytemap_get_reg(struct vgic_bytemap *x, int cpuid, u32 offset)
{
offset >>= 2;
BUG_ON(offset > (VGIC_NR_IRQS / 4));
- if (offset < 4)
+ if (offset < 8)
return x->percpu[cpuid] + offset;
else
return x->shared + offset - 8;