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Subject[PATCH 10/34] AMD IOMMU: add device table initialization functions
Date
This patch adds functions necessary to initialize the device table from the
ACPI definitions.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
arch/x86/kernel/amd_iommu_init.c | 45 ++++++++++++++++++++++++++++++++++++++
1 files changed, 45 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index c2be3ad..4c37abb 100644
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -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;
+ }
+}
+
--
1.5.3.7



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