[RFC PATCH 15/33] irqchip/gic-v4: Add management structure definitions

[Marc Zyngier]

Add a bunch of GICv4-specific data structures that will get used in
subsequent patches.

Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
---
 include/linux/irqchip/arm-gic-v4.h | 92 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 include/linux/irqchip/arm-gic-v4.h

diff --git a/include/linux/irqchip/arm-gic-v4.h b/include/linux/irqchip/arm-gic-v4.h
new file mode 100644
index 0000000..6e9c2b3
--- /dev/null
+++ b/include/linux/irqchip/arm-gic-v4.h
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2016 ARM Limited, All Rights Reserved.
+ * Author: Marc Zyngier <marc.zyngier@xxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __LINUX_IRQCHIP_ARM_GIC_V4_H
+#define __LINUX_IRQCHIP_ARM_GIC_V4_H
+
+/* Embedded in kvm.arch */
+struct its_vm {
+	struct irq_domain	*domain;
+	struct page		*vprop_page;
+	irq_hw_number_t		db_lpi_base;
+	unsigned long		*db_bitmap;
+	int			nr_db_lpis;
+};
+
+/* Embedded in kvm_vcpu.arch */
+struct its_vpe {
+	struct page 		*vpt_page;
+	struct its_vm		*its_vm;
+	irq_hw_number_t		vpe_db_lpi;
+	u16			col_idx;
+	u16			vpe_id;
+	bool			idai;
+	bool			pending_last;
+};
+
+/*
+ * struct its_vlpi: structure describing a VLPI. Only to be
+ * interpreted in the context of a physical interrupt it complements.
+ *
+ * @vintid:	Virtual LPI number
+ * @db_enabled:	Is the VPE doorbell to be generated?
+ * @vpe_idx:	Index (0-based) of the VPE in this VM. Not the vpe_id!
+ */
+struct its_vlpi {
+	u32			vintid;
+	bool			db_enabled;
+	u16			vpe_idx;
+};
+
+/*
+ * struct its_vlpi_map: structure describing the mappings of all vlpis
+ * for a single device. To be used as the vcpu_info passed to
+ * irq_set_vcpu_affinity().
+ *
+ * @vpes: Array of struct its_vpe, describing the GICv4 view of the
+ * 	  vpus.
+ * @vlpis: Array of struct vlpi, each one matching one the
+ *	   corresponding LPI
+ * @nr_vpes: Size of the @vpes array
+ * @nr_vlpis: Size of the @vlpis array
+ */
+struct its_vlpi_map {
+	/* nr_vpes  */
+	struct its_vpe		**vpes;
+	struct its_vlpi		*vlpis;
+	int			nr_vpes;
+	int			nr_vlpis;
+};
+
+enum its_cmd_type {
+	MAP_VLPI,
+	UNMAP_VLPI,
+	PROP_UPDATE_VLPI,
+	SCHEDULE_VPE,
+	DESCHEDULE_VPE,
+	INVALL_VPE,
+};
+
+struct its_cmd_info {
+	enum its_cmd_type		cmd_type;
+	union {
+		struct its_vlpi_map	*map;
+		u8			config;
+	};
+};
+
+#endif
-- 
2.1.4