linux-kernel - [PATCH v8 3/8] iommu: introduce an msi cookie

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Date:	Thu, 28 Apr 2016 08:15:18 +0000
From:	Eric Auger <eric.auger@...aro.org>
To:	eric.auger@...com, eric.auger@...aro.org, robin.murphy@....com,
	alex.williamson@...hat.com, will.deacon@....com, joro@...tes.org,
	tglx@...utronix.de, jason@...edaemon.net, marc.zyngier@....com,
	christoffer.dall@...aro.org, linux-arm-kernel@...ts.infradead.org
Cc:	patches@...aro.org, linux-kernel@...r.kernel.org,
	Bharat.Bhushan@...escale.com, pranav.sawargaonkar@...il.com,
	p.fedin@...sung.com, iommu@...ts.linux-foundation.org,
	Jean-Philippe.Brucker@....com, julien.grall@....com
Subject: [PATCH v8 3/8] iommu: introduce an msi cookie

This opaque pointer will enable to store information about msi
iommu mappings.

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

---
v7 -> v8:
remove spinlock and RB tree

v5 -> v6:
- initialize reserved_binding_list
- use a spinlock instead of a mutex
---
 include/linux/iommu.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index ea5d288..cb8d30a 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -91,6 +91,7 @@ struct iommu_domain {
 	struct iommu_domain_geometry geometry;
 	struct iommu_domain_msi_geometry msi_geometry;
 	void *iova_cookie;
+	void *msi_cookie;
 };
 
 enum iommu_cap {
-- 
1.9.1