linux-kernel - [PATCH v2 31/52] irqchip/gic-v4: Add VLPI configuration interface

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Message-Id: <20170628150411.15846-32-marc.zyngier@arm.com>
Date:   Wed, 28 Jun 2017 16:03:50 +0100
From:   Marc Zyngier <marc.zyngier@....com>
To:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        kvmarm@...ts.cs.columbia.edu
Cc:     Christoffer Dall <christoffer.dall@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Eric Auger <eric.auger@...hat.com>,
        Shanker Donthineni <shankerd@...eaurora.org>,
        Mark Rutland <mark.rutland@....com>
Subject: [PATCH v2 31/52] irqchip/gic-v4: Add VLPI configuration interface

Add the required interfaces to map, unmap and update a VLPI.

Reviewed-by: Eric Auger <eric.auger@...hat.com>
Reviewed-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Marc Zyngier <marc.zyngier@....com>
---
 drivers/irqchip/irq-gic-v4.c       | 42 ++++++++++++++++++++++++++++++++++++++
 include/linux/irqchip/arm-gic-v4.h |  4 ++++
 2 files changed, 46 insertions(+)

diff --git a/drivers/irqchip/irq-gic-v4.c b/drivers/irqchip/irq-gic-v4.c
index 3c5ad70193ed..697d9dc1e005 100644
--- a/drivers/irqchip/irq-gic-v4.c
+++ b/drivers/irqchip/irq-gic-v4.c
@@ -81,3 +81,45 @@ int its_invall_vpe(struct its_vpe *vpe)
 
 	return its_send_vpe_cmd(vpe, &info);
 }
+
+int its_map_vlpi(int irq, struct its_vlpi_map *map)
+{
+	struct its_cmd_info info = {
+		.cmd_type = MAP_VLPI,
+		.map      = map,
+	};
+
+	/*
+	 * The host will never see that interrupt firing again, so it
+	 * is vital that we don't do any lazy masking.
+	 */
+	irq_set_status_flags(irq, IRQ_DISABLE_UNLAZY);
+
+	return irq_set_vcpu_affinity(irq, &info);
+}
+
+int its_get_vlpi(int irq, struct its_vlpi_map *map)
+{
+	struct its_cmd_info info = {
+		.cmd_type = GET_VLPI,
+		.map      = map,
+	};
+
+	return irq_set_vcpu_affinity(irq, &info);
+}
+
+int its_unmap_vlpi(int irq)
+{
+	irq_clear_status_flags(irq, IRQ_DISABLE_UNLAZY);
+	return irq_set_vcpu_affinity(irq, NULL);
+}
+
+int its_prop_update_vlpi(int irq, u8 config, bool inv)
+{
+	struct its_cmd_info info = {
+		.cmd_type = inv ? PROP_UPDATE_AND_INV_VLPI : PROP_UPDATE_VLPI,
+		.config   = config,
+	};
+
+	return irq_set_vcpu_affinity(irq, &info);
+}
diff --git a/include/linux/irqchip/arm-gic-v4.h b/include/linux/irqchip/arm-gic-v4.h
index 97bb97a11fef..843c9ff29269 100644
--- a/include/linux/irqchip/arm-gic-v4.h
+++ b/include/linux/irqchip/arm-gic-v4.h
@@ -92,5 +92,9 @@ int its_alloc_vcpu_irqs(struct its_vm *vm);
 void its_free_vcpu_irqs(struct its_vm *vm);
 int its_schedule_vpe(struct its_vpe *vpe, bool on);
 int its_invall_vpe(struct its_vpe *vpe);
+int its_map_vlpi(int irq, struct its_vlpi_map *map);
+int its_get_vlpi(int irq, struct its_vlpi_map *map);
+int its_unmap_vlpi(int irq);
+int its_prop_update_vlpi(int irq, u8 config, bool inv);
 
 #endif
-- 
2.11.0