redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

amd-iommu: handle alias entries correctly in init code 

An alias entry in the ACPI table means that the device can send requests to the
IOMMU with both device ids, its own and the alias. This is not handled properly
in the ACPI init code. This patch fixes the issue.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
hifive-unleashed-5.1
Joerg Roedel 2009-07-02 12:23:23 +02:00
parent 6a047d8b9e
commit 7a6a3a086f
1 changed files with 7 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
arch/x86/kernel/amd_iommu_init.c
View File

@ -691,6 +691,7 @@ static void __init init_iommu_from_acpi(struct amd_iommu *iommu,
devid = e->devid;
devid_to = e->ext >> 8;
set_dev_entry_from_acpi(iommu, devid , e->flags, 0);
set_dev_entry_from_acpi(iommu, devid_to, e->flags, 0);
amd_iommu_alias_table[devid] = devid_to;
break;
@ -749,11 +750,13 @@ static void __init init_iommu_from_acpi(struct amd_iommu *iommu,
devid = e->devid;
for (dev_i = devid_start; dev_i <= devid; ++dev_i) {
if (alias)
if (alias) {
amd_iommu_alias_table[dev_i] = devid_to;
set_dev_entry_from_acpi(iommu,
amd_iommu_alias_table[dev_i],
flags, ext_flags);
set_dev_entry_from_acpi(iommu,
devid_to, flags, ext_flags);
}
set_dev_entry_from_acpi(iommu, dev_i,
flags, ext_flags);
}
break;
default: