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KVM: arm/arm64: vgic: Convert struct vgic_lr to use bitfields

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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>
This commit is contained in:
Marc Zyngier 2015-06-08 15:21:32 +01:00
parent abdf584383
commit 32d2d8010c
1 changed files with 7 additions and 3 deletions
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10
include/kvm/arm_vgic.h
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@ -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 {