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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: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2008-12-02 17:46:25 +01:00
parent 43f4960983
commit 9fdb19d64c
2 changed files with 10 additions and 5 deletions
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14
arch/x86/include/asm/amd_iommu_types.h
View File

@ -190,16 +190,20 @@
/* 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.
*/
struct protection_domain {
spinlock_t lock; /* mostly used to lock the page table*/
u16 id; /* the domain id written to the device table */
int mode; /* paging mode (0-6 levels) */
u64 *pt_root; /* page table root pointer */
void *priv; /* private data */
spinlock_t lock; /* mostly used to lock the page table*/
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 */
};
/*

1
arch/x86/kernel/amd_iommu.c
View File

@ -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;