linux-kernel - [PATCH v3 04/10] VFIO: platform: add vfio_platform_set

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Message-Id: <1439212864-12954-5-git-send-email-eric.auger@linaro.org>
Date:	Mon, 10 Aug 2015 15:20:58 +0200
From:	Eric Auger <eric.auger@...aro.org>
To:	eric.auger@...com, eric.auger@...aro.org,
	linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
	kvm@...r.kernel.org, christoffer.dall@...aro.org,
	marc.zyngier@....com, alex.williamson@...hat.com, feng.wu@...el.com
Cc:	linux-kernel@...r.kernel.org, patches@...aro.org,
	pbonzini@...hat.com
Subject: [PATCH v3 04/10] VFIO: platform: add vfio_platform_set_automasked

This function makes possible to change the automasked mode.

Signed-off-by: Eric Auger <eric.auger@...aro.org>

---

v1 -> v2:
- set forwarded flag
---
 drivers/vfio/platform/vfio_platform_irq.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/vfio/platform/vfio_platform_irq.c b/drivers/vfio/platform/vfio_platform_irq.c
index b31b1f0..a285384 100644
--- a/drivers/vfio/platform/vfio_platform_irq.c
+++ b/drivers/vfio/platform/vfio_platform_irq.c
@@ -186,6 +186,25 @@ static irqreturn_t vfio_handler(int irq, void *dev_id)
 	return ret;
 }
 
+static int vfio_platform_set_automasked(struct vfio_platform_irq *irq,
+					   bool automasked)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&irq->lock, flags);
+	if (automasked) {
+		irq->forwarded = true;
+		irq->flags |= VFIO_IRQ_INFO_AUTOMASKED;
+		irq->handler = vfio_automasked_irq_handler;
+	} else {
+		irq->forwarded = false;
+		irq->flags &= ~VFIO_IRQ_INFO_AUTOMASKED;
+		irq->handler = vfio_irq_handler;
+	}
+	spin_unlock_irqrestore(&irq->lock, flags);
+	return 0;
+}
+
 static void vfio_platform_irq_bypass_stop(struct irq_bypass_producer *prod)
 {
 }
-- 
1.9.1

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