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Commit 9fdb19d6 authored by Joerg Roedel's avatar Joerg Roedel
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AMD IOMMU: add protection domain flags 



Imapct: add a new struct member to 'struct protection_domain'

When using protection domains for dma_ops and KVM its better to know for
which subsystem it was allocated. Add a flags member to struct
protection domain for that purpose.

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 43f49609

arch/x86/include/asm/amd_iommu_types.h

+9 −5
Original line number Diff line number Diff line
@@ -190,6 +190,9 @@ 
/* FIXME: move this macro to <linux/pci.h> */

#define PCI_BUS(x) (((x) >> 8) & 0xff)



/* Protection domain flags */

#define PD_DMA_OPS_MASK		(1UL << 0) /* domain used for dma_ops */



/*

 * This structure contains generic data for  IOMMU protection domains

 * independent of their use.
@@ -199,6 +202,7 @@ struct protection_domain { 
	u16 id;			/* the domain id written to the device table */

	int mode;		/* paging mode (0-6 levels) */

	u64 *pt_root;		/* page table root pointer */

	unsigned long flags;	/* flags to find out type of domain */

	void *priv;		/* private data */

};

arch/x86/kernel/amd_iommu.c

+1 −0
Original line number Diff line number Diff line
@@ -729,6 +729,7 @@ static struct dma_ops_domain *dma_ops_domain_alloc(struct amd_iommu *iommu, 
		goto free_dma_dom;

	dma_dom->domain.mode = PAGE_MODE_3_LEVEL;

	dma_dom->domain.pt_root = (void *)get_zeroed_page(GFP_KERNEL);

	dma_dom->domain.flags = PD_DMA_OPS_MASK;

	dma_dom->domain.priv = dma_dom;

	if (!dma_dom->domain.pt_root)

		goto free_dma_dom;