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| author | Marc Zyngier <marc.zyngier@arm.com> | 2015-06-08 15:21:32 +0100 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2015-08-12 11:28:24 +0100 |
| commit | 32d2d8010cd7080a0f1712f1084b92657858428e (patch) | |
| tree | 660faf292f21198a8bde11f78c5f8129bce6436c /include/kvm | |
| parent | abdf58438356c7baf34bdd98084b094ca3a6a23f (diff) | |
| download | linux-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.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h index 133ea00aa83b..a881e398d3e5 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 { |