x86, AMD IOMMU: add device table initialization functions
This patch adds functions necessary to initialize the device table from the ACPI definitions. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Cc: iommu@lists.linux-foundation.org Cc: bhavna.sarathy@amd.com Cc: Sebastian.Biemueller@amd.com Cc: robert.richter@amd.com Cc: joro@8bytes.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -308,3 +308,48 @@ static void __init free_command_buffer(struct amd_iommu *iommu)
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get_order(CMD_BUFFER_SIZE));
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}
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static void set_dev_entry_bit(u16 devid, u8 bit)
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{
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int i = (bit >> 5) & 0x07;
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int _bit = bit & 0x1f;
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amd_iommu_dev_table[devid].data[i] |= (1 << _bit);
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}
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static void __init set_dev_entry_from_acpi(u16 devid, u32 flags, u32 ext_flags)
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{
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if (flags & ACPI_DEVFLAG_INITPASS)
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set_dev_entry_bit(devid, DEV_ENTRY_INIT_PASS);
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if (flags & ACPI_DEVFLAG_EXTINT)
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set_dev_entry_bit(devid, DEV_ENTRY_EINT_PASS);
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if (flags & ACPI_DEVFLAG_NMI)
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set_dev_entry_bit(devid, DEV_ENTRY_NMI_PASS);
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if (flags & ACPI_DEVFLAG_SYSMGT1)
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set_dev_entry_bit(devid, DEV_ENTRY_SYSMGT1);
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if (flags & ACPI_DEVFLAG_SYSMGT2)
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set_dev_entry_bit(devid, DEV_ENTRY_SYSMGT2);
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if (flags & ACPI_DEVFLAG_LINT0)
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set_dev_entry_bit(devid, DEV_ENTRY_LINT0_PASS);
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if (flags & ACPI_DEVFLAG_LINT1)
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set_dev_entry_bit(devid, DEV_ENTRY_LINT1_PASS);
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}
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static void __init set_iommu_for_device(struct amd_iommu *iommu, u16 devid)
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{
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amd_iommu_rlookup_table[devid] = iommu;
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}
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static void __init set_device_exclusion_range(u16 devid, struct ivmd_header *m)
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{
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struct amd_iommu *iommu = amd_iommu_rlookup_table[devid];
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if (!(m->flags & IVMD_FLAG_EXCL_RANGE))
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return;
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if (iommu) {
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set_dev_entry_bit(m->devid, DEV_ENTRY_EX);
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iommu->exclusion_start = m->range_start;
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iommu->exclusion_length = m->range_length;
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}
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}
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