irqchip/gic-v4: Add management structure definitions

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

Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

diff --git a/include/linux/irqchip/arm-gic-v4.h b/include/linux/irqchip/arm-gic-v4.h
new file mode 100644 (file)
index 0000000..d499538
--- /dev/null
+++ b/include/linux/irqchip/arm-gic-v4.h
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2016,2017 ARM Limited, All Rights Reserved.
+ * Author: Marc Zyngier <marc.zyngier@arm.com>
+ *
+ * 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
+
+struct its_vpe;
+
+/* Embedded in kvm.arch */
+struct its_vm {
+       struct fwnode_handle    *fwnode;
+       struct irq_domain       *domain;
+       struct page             *vprop_page;
+       struct its_vpe          **vpes;
+       int                     nr_vpes;
+       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;
+       /* Doorbell interrupt */
+       int                     irq;
+       irq_hw_number_t         vpe_db_lpi;
+       /*
+        * This collection ID is used to indirect the target
+        * redistributor for this VPE. The ID itself isn't involved in
+        * programming of the ITS.
+        */
+       u16                     col_idx;
+       /* Unique (system-wide) VPE identifier */
+       u16                     vpe_id;
+       /* Implementation Defined Area Invalid */
+       bool                    idai;
+       /* Pending VLPIs on schedule out? */
+       bool                    pending_last;
+};
+
+/*
+ * struct its_vlpi_map: structure describing the mapping of a
+ * VLPI. Only to be interpreted in the context of a physical interrupt
+ * it complements.  To be used as the vcpu_info passed to
+ * irq_set_vcpu_affinity().
+ *
+ * @vm:                Pointer to the GICv4 notion of a VM
+ * @vpe:       Pointer to the GICv4 notion of a virtual CPU (VPE)
+ * @vintid:    Virtual LPI number
+ * @db_enabled:        Is the VPE doorbell to be generated?
+ */
+struct its_vlpi_map {
+       struct its_vm           *vm;
+       struct its_vpe          *vpe;
+       u32                     vintid;
+       bool                    db_enabled;
+};
+
+enum its_vcpu_info_cmd_type {
+       MAP_VLPI,
+       GET_VLPI,
+       PROP_UPDATE_VLPI,
+       PROP_UPDATE_AND_INV_VLPI,
+       SCHEDULE_VPE,
+       DESCHEDULE_VPE,
+       INVALL_VPE,
+};
+
+struct its_cmd_info {
+       enum its_vcpu_info_cmd_type     cmd_type;
+       union {
+               struct its_vlpi_map     *map;
+               u8                      config;
+       };
+};
+
+#endif