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x86/amd-iommu: Introduce set_dte_entry function

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This function factors out some logic of attach_device to a
seperate function. This new function will be used to update
device table entries when necessary.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2009-09-02 16:07:00 +02:00
parent 6a0dbcbe4e
commit 407d733e30
1 changed files with 17 additions and 10 deletions
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27
arch/x86/kernel/amd_iommu.c
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@ -1058,18 +1058,10 @@ static struct protection_domain *domain_for_device(u16 devid)
return dom; return dom;
} }
/* static void set_dte_entry(u16 devid, struct protection_domain *domain)
* If a device is not yet associated with a domain, this function does
* assigns it visible for the hardware
*/
static void attach_device(struct amd_iommu *iommu,
struct protection_domain *domain,
u16 devid)
{ {
unsigned long flags;
u64 pte_root = virt_to_phys(domain->pt_root); u64 pte_root = virt_to_phys(domain->pt_root);
unsigned long flags;
domain->dev_cnt += 1;
pte_root |= (domain->mode & DEV_ENTRY_MODE_MASK) pte_root |= (domain->mode & DEV_ENTRY_MODE_MASK)
<< DEV_ENTRY_MODE_SHIFT; << DEV_ENTRY_MODE_SHIFT;
@ -1082,6 +1074,21 @@ static void attach_device(struct amd_iommu *iommu,
amd_iommu_pd_table[devid] = domain; amd_iommu_pd_table[devid] = domain;
write_unlock_irqrestore(&amd_iommu_devtable_lock, flags); write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
}
/*
* If a device is not yet associated with a domain, this function does
* assigns it visible for the hardware
*/
static void attach_device(struct amd_iommu *iommu,
struct protection_domain *domain,
u16 devid)
{
/* set the DTE entry */
set_dte_entry(devid, domain);
/* increase reference counter */
domain->dev_cnt += 1;
/* /*
* We might boot into a crash-kernel here. The crashed kernel * We might boot into a crash-kernel here. The crashed kernel