[PATCH v7 1/8] genirq/msi: Add a new MSI_FLAG_IRQ_REMAPPING flag

From	Eric Auger <eric.auger@linaro.org>
Newsgroups	linux.kernel
Subject	[PATCH v7 1/8] genirq/msi: Add a new MSI_FLAG_IRQ_REMAPPING flag
Date	2016-04-19 19:20 +0200
Message-ID	<rpHtE-1RO-1@gated-at.bofh.it> (permalink)
References	<rpHtE-1RO-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Let's introduce a new msi_domain_info flag value, MSI_FLAG_IRQ_REMAPPING
meant to tell the domain supports IRQ REMAPPING, also known as Interrupt
Translation Service. On Intel HW this IRQ remapping capability is
abstracted on IOMMU side while on ARM it is abstracted on MSI controller
side. This flag will be used to know whether the MSI passthrough is
safe.

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

---

v4 -> v5:
- seperate flag introduction from first user addition (ITS)
---
 include/linux/msi.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/msi.h b/include/linux/msi.h
index 8b425c6..08441b1 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -270,6 +270,8 @@ enum {
 	MSI_FLAG_MULTI_PCI_MSI		= (1 << 3),
 	/* Support PCI MSIX interrupts */
 	MSI_FLAG_PCI_MSIX		= (1 << 4),
+	/* Support MSI IRQ remapping service */
+	MSI_FLAG_IRQ_REMAPPING		= (1 << 5),
 };
 
 int msi_domain_set_affinity(struct irq_data *data, const struct cpumask *mask,
-- 
1.9.1

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[PATCH v7 1/8] genirq/msi: Add a new MSI_FLAG_IRQ_REMAPPING flag Eric Auger <eric.auger@linaro.org> - 2016-04-19 19:20 +0200
  Re: [PATCH v7 1/8] genirq/msi: Add a new MSI_FLAG_IRQ_REMAPPING flag Robin Murphy <robin.murphy@arm.com> - 2016-04-22 13:10 +0200
    Re: [PATCH v7 1/8] genirq/msi: Add a new MSI_FLAG_IRQ_REMAPPING flag Eric Auger <eric.auger@linaro.org> - 2016-04-22 14:30 +0200
      Re: [PATCH v7 1/8] genirq/msi: Add a new MSI_FLAG_IRQ_REMAPPING  flag Thomas Gleixner <tglx@linutronix.de> - 2016-04-22 17:50 +0200

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