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x86/amd-iommu: Flush domains if address space size was increased

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Thist patch introduces the update_domain function which
propagates the larger address space of a protection domain
to the device table and flushes all relevant DTEs and the
domain TLB.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2009-09-02 16:00:23 +02:00
parent 407d733e30
commit 04bfdd8406
2 changed files with 33 additions and 0 deletions
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1
arch/x86/include/asm/amd_iommu_types.h
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@ -235,6 +235,7 @@ struct protection_domain {
int mode; /* paging mode (0-6 levels) */
u64 *pt_root; /* page table root pointer */
unsigned long flags; /* flags to find out type of domain */
bool updated; /* complete domain flush required */
unsigned dev_cnt; /* devices assigned to this domain */
void *priv; /* private data */
};

32
arch/x86/kernel/amd_iommu.c
View File

@ -63,6 +63,7 @@ static void dma_ops_reserve_addresses(struct dma_ops_domain *dom,
unsigned int pages);
static u64 *fetch_pte(struct protection_domain *domain,
unsigned long address);
static void update_domain(struct protection_domain *domain);
#ifndef BUS_NOTIFY_UNBOUND_DRIVER
#define BUS_NOTIFY_UNBOUND_DRIVER 0x0005
@ -546,6 +547,8 @@ static int iommu_map_page(struct protection_domain *dom,
*pte = __pte;
update_domain(dom);
return 0;
}
@ -762,9 +765,13 @@ static int alloc_new_range(struct amd_iommu *iommu,
dma_ops_reserve_addresses(dma_dom, i << PAGE_SHIFT, 1);
}
update_domain(&dma_dom->domain);
return 0;
out_free:
update_domain(&dma_dom->domain);
free_page((unsigned long)dma_dom->aperture[index]->bitmap);
kfree(dma_dom->aperture[index]);
@ -1294,6 +1301,29 @@ static int get_device_resources(struct device *dev,
return 1;
}
static void update_device_table(struct protection_domain *domain)
{
int i;
for (i = 0; i <= amd_iommu_last_bdf; ++i) {
if (amd_iommu_pd_table[i] != domain)
continue;
set_dte_entry(i, domain);
}
}
static void update_domain(struct protection_domain *domain)
{
if (!domain->updated)
return;
update_device_table(domain);
flush_devices_by_domain(domain);
iommu_flush_domain(domain->id);
domain->updated = false;
}
/*
* If the pte_page is not yet allocated this function is called
*/
@ -1351,6 +1381,8 @@ static u64* dma_ops_get_pte(struct dma_ops_domain *dom,
} else
pte += IOMMU_PTE_L0_INDEX(address);
update_domain(&dom->domain);
return pte;
}