[PATCH V8 1/9] iommu: add IOMMU_PRIV attribute
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From: joro@8bytes.org (Joerg Roedel)
Date: 2017-01-06 11:07:13
Also in:
linux-iommu, lkml
On Mon, Jan 02, 2017 at 06:42:36PM +0530, Sricharan R wrote:
quoted hunk ↗ jump to hunk
From: Mitchel Humpherys <redacted> Add the IOMMU_PRIV attribute, which is used to indicate privileged mappings. Reviewed-by: Robin Murphy <robin.murphy@arm.com> Tested-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Mitchel Humpherys <redacted> Acked-by: Will Deacon <redacted> --- include/linux/iommu.h | 1 + 1 file changed, 1 insertion(+)diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 0ff5111..8c15ada 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h@@ -31,6 +31,7 @@ #define IOMMU_CACHE (1 << 2) /* DMA cache coherency */ #define IOMMU_NOEXEC (1 << 3) #define IOMMU_MMIO (1 << 4) /* e.g. things like MSI doorbells */ +#define IOMMU_PRIV (1 << 5) /* privileged */
Since this is a new generic global flag, can you please add a more verbose comment telling what a 'privileged' mapping is about in the iommu-case? We should have a clear defined semantic for this flag or we might end up with different meanings for it with different iommu-hardware. Joerg