From 32d2d8010cd7080a0f1712f1084b92657858428e Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Mon, 8 Jun 2015 15:21:32 +0100 Subject: [PATCH] KVM: arm/arm64: vgic: Convert struct vgic_lr to use bitfields MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Reviewed-by: Christoffer Dall Signed-off-by: Marc Zyngier --- include/kvm/arm_vgic.h | 10 +++++++--- 1 file 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 { -- 2.20.1