[PATCH v3 14/59] irqchip/gic-v4: Add management structure definitions

Marc Zyngier
2017-07-31T17:26:05Z

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>
---
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 000000000000..5ba0fb6b094d
--- /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
+ * @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_map {
+ struct its_vm *vm;
+ u32 vintid;
+ bool db_enabled;
+ u16 vpe_idx;
+};
+
+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
--
2.11.0