linux-kernel - [PATCH v1 1/4] iommu: Add IOMMU_SYS_CACHE flag for system cache control

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Message-ID: <20240826071641.2691374-2-manojvishy@google.com>
Date: Mon, 26 Aug 2024 07:16:38 +0000
From: Manoj Vishwanathan <manojvishy@...gle.com>
To: Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>, 
	Joerg Roedel <joro@...tes.org>, Alex Williamson <alex.williamson@...hat.com>, 
	linux-arm-kernel@...ts.infradead.org
Cc: kvm@...r.kernel.org, iommu@...ts.linux.dev, linux-kernel@...r.kernel.org, 
	David Dillow <dillow@...gle.com>, Manoj Vishwanathan <manojvishy@...gle.com>
Subject: [PATCH v1 1/4] iommu: Add IOMMU_SYS_CACHE flag for system cache control

This flag indicates whether the associated page should be cached in the
system's cache hierarchy.

Signed-off-by: Manoj Vishwanathan <manojvishy@...gle.com>
---
 include/linux/iommu.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 04cbdae0052e..ca895c83c24f 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -31,6 +31,12 @@
  */
 #define IOMMU_PRIV	(1 << 5)
 
+/*
+ * Flag to indicate whether the associated page should be cached in the
+ * system's cache hierarchy.
+ */
+#define IOMMU_SYS_CACHE (1 << 6)
+
 struct iommu_ops;
 struct iommu_group;
 struct bus_type;
-- 
2.46.0.295.g3b9ea8a38a-goog