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Commit 3566b778 authored by Joerg Roedel's avatar Joerg Roedel Committed by Ingo Molnar
Browse files

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: default avatarJoerg 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: default avatarIngo Molnar <mingo@elte.hu>
parent b36ca91e

arch/x86/kernel/amd_iommu_init.c

+45 −0
Original line number Diff line number Diff line
@@ -308,3 +308,48 @@ static void __init free_command_buffer(struct amd_iommu *iommu) 
				get_order(CMD_BUFFER_SIZE));

}



static void set_dev_entry_bit(u16 devid, u8 bit)

{

	int i = (bit >> 5) & 0x07;

	int _bit = bit & 0x1f;



	amd_iommu_dev_table[devid].data[i] |= (1 << _bit);

}



static void __init set_dev_entry_from_acpi(u16 devid, u32 flags, u32 ext_flags)

{

	if (flags & ACPI_DEVFLAG_INITPASS)

		set_dev_entry_bit(devid, DEV_ENTRY_INIT_PASS);

	if (flags & ACPI_DEVFLAG_EXTINT)

		set_dev_entry_bit(devid, DEV_ENTRY_EINT_PASS);

	if (flags & ACPI_DEVFLAG_NMI)

		set_dev_entry_bit(devid, DEV_ENTRY_NMI_PASS);

	if (flags & ACPI_DEVFLAG_SYSMGT1)

		set_dev_entry_bit(devid, DEV_ENTRY_SYSMGT1);

	if (flags & ACPI_DEVFLAG_SYSMGT2)

		set_dev_entry_bit(devid, DEV_ENTRY_SYSMGT2);

	if (flags & ACPI_DEVFLAG_LINT0)

		set_dev_entry_bit(devid, DEV_ENTRY_LINT0_PASS);

	if (flags & ACPI_DEVFLAG_LINT1)

		set_dev_entry_bit(devid, DEV_ENTRY_LINT1_PASS);

}



static void __init set_iommu_for_device(struct amd_iommu *iommu, u16 devid)

{

	amd_iommu_rlookup_table[devid] = iommu;

}



static void __init set_device_exclusion_range(u16 devid, struct ivmd_header *m)

{

	struct amd_iommu *iommu = amd_iommu_rlookup_table[devid];



	if (!(m->flags & IVMD_FLAG_EXCL_RANGE))

		return;



	if (iommu) {

		set_dev_entry_bit(m->devid, DEV_ENTRY_EX);

		iommu->exclusion_start = m->range_start;

		iommu->exclusion_length = m->range_length;

	}

}