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x86/amd-iommu: Introduce set_dte_entry function
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>
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@ -1058,18 +1058,10 @@ static struct protection_domain *domain_for_device(u16 devid)
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return dom;
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}
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/*
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* If a device is not yet associated with a domain, this function does
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* assigns it visible for the hardware
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*/
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static void attach_device(struct amd_iommu *iommu,
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struct protection_domain *domain,
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u16 devid)
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static void set_dte_entry(u16 devid, struct protection_domain *domain)
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{
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unsigned long flags;
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u64 pte_root = virt_to_phys(domain->pt_root);
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domain->dev_cnt += 1;
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unsigned long flags;
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pte_root |= (domain->mode & DEV_ENTRY_MODE_MASK)
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<< DEV_ENTRY_MODE_SHIFT;
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@ -1082,6 +1074,21 @@ static void attach_device(struct amd_iommu *iommu,
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amd_iommu_pd_table[devid] = domain;
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write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);
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}
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/*
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* If a device is not yet associated with a domain, this function does
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* assigns it visible for the hardware
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*/
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static void attach_device(struct amd_iommu *iommu,
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struct protection_domain *domain,
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u16 devid)
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{
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/* set the DTE entry */
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set_dte_entry(devid, domain);
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/* increase reference counter */
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domain->dev_cnt += 1;
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/*
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* We might boot into a crash-kernel here. The crashed kernel
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