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authorMarc Zyngier <marc.zyngier@arm.com>2015-06-08 15:21:32 +0100
committerMarc Zyngier <marc.zyngier@arm.com>2015-08-12 11:28:24 +0100
commit32d2d8010cd7080a0f1712f1084b92657858428e (patch)
tree660faf292f21198a8bde11f78c5f8129bce6436c /include/kvm
parentabdf58438356c7baf34bdd98084b094ca3a6a23f (diff)
downloadop-kernel-dev-32d2d8010cd7080a0f1712f1084b92657858428e.zip
op-kernel-dev-32d2d8010cd7080a0f1712f1084b92657858428e.tar.gz
KVM: arm/arm64: vgic: Convert struct vgic_lr to use bitfields
As we're about to cram more information in the vgic_lr structure (HW interrupt number and additional state information), we switch to a layout similar to the HW's: - use bitfields to save space (we don't need more than 10 bits to represent the irq numbers) - source CPU and HW interrupt can share the same field, as a SGI doesn't have a physical line. Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'include/kvm')
-rw-r--r--include/kvm/arm_vgic.h10
1 files changed, 7 insertions, 3 deletions
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
index 133ea00..a881e39 100644
--- a/include/kvm/arm_vgic.h
+++ b/include/kvm/arm_vgic.h
@@ -95,11 +95,15 @@ enum vgic_type {
#define LR_STATE_ACTIVE (1 << 1)
#define LR_STATE_MASK (3 << 0)
#define LR_EOI_INT (1 << 2)
+#define LR_HW (1 << 3)
struct vgic_lr {
- u16 irq;
- u8 source;
- u8 state;
+ unsigned irq:10;
+ union {
+ unsigned hwirq:10;
+ unsigned source:3;
+ };
+ unsigned state:4;
};
struct vgic_vmcr {
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