ARM: gic: define GICH offsets for VGIC support

The GICH_* constants are defined by the GIC HW spec, and even though
they only be used by KVM to begin with, define them generically in gic.h.
Reviewed-by: NWill Deacon <will.deacon@arm.com>
Signed-off-by: NChristoffer Dall <c.dall@virtualopensystems.com>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>

include/linux/irqchip/arm-gic.h

@@ -32,6 +32,31 @@
 #define GIC_DIST_CONFIG			0xc00
 #define GIC_DIST_SOFTINT		0xf00
 
+#define GICH_HCR			0x0
+#define GICH_VTR			0x4
+#define GICH_VMCR			0x8
+#define GICH_MISR			0x10
+#define GICH_EISR0 			0x20
+#define GICH_EISR1 			0x24
+#define GICH_ELRSR0 			0x30
+#define GICH_ELRSR1 			0x34
+#define GICH_APR			0xf0
+#define GICH_LR0			0x100
+
+#define GICH_HCR_EN			(1 << 0)
+#define GICH_HCR_UIE			(1 << 1)
+
+#define GICH_LR_VIRTUALID		(0x3ff << 0)
+#define GICH_LR_PHYSID_CPUID_SHIFT	(10)
+#define GICH_LR_PHYSID_CPUID		(7 << GICH_LR_PHYSID_CPUID_SHIFT)
+#define GICH_LR_STATE			(3 << 28)
+#define GICH_LR_PENDING_BIT		(1 << 28)
+#define GICH_LR_ACTIVE_BIT		(1 << 29)
+#define GICH_LR_EOI			(1 << 19)
+
+#define GICH_MISR_EOI			(1 << 0)
+#define GICH_MISR_U			(1 << 1)
+
 struct device_node;
 
 extern struct irq_chip gic_arch_extn;