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iommu/amd: Extend IVRS special device data structure 

This patch extends the devid_map data structure to allow
ioapic and hpet entries in ivrs to be overridden on the
kernel command line.

Reviewed-by: Shuah Khan <shuahkhan@gmail.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
hifive-unleashed-5.1
Joerg Roedel 2013-04-09 16:53:58 +02:00
parent d3da2200d0
commit 31cff67f6b
2 changed files with 21 additions and 10 deletions
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30
drivers/iommu/amd_iommu_init.c
View File

@ -703,25 +703,35 @@ static void __init set_dev_entry_from_acpi(struct amd_iommu *iommu,
set_iommu_for_device(iommu, devid);
}
static int __init add_special_device(u8 type, u8 id, u16 devid)
static int __init add_special_device(u8 type, u8 id, u16 devid, bool cmd_line)
{
struct devid_map *entry;
struct list_head *list;
if (type != IVHD_SPECIAL_IOAPIC && type != IVHD_SPECIAL_HPET)
if (type == IVHD_SPECIAL_IOAPIC)
list = &ioapic_map;
else if (type == IVHD_SPECIAL_HPET)
list = &hpet_map;
else
return -EINVAL;
list_for_each_entry(entry, list, list) {
if (!(entry->id == id && entry->cmd_line))
continue;
pr_info("AMD-Vi: Command-line override present for %s id %d - ignoring\n",
type == IVHD_SPECIAL_IOAPIC ? "IOAPIC" : "HPET", id);
return 0;
}
entry = kzalloc(sizeof(*entry), GFP_KERNEL);
if (!entry)
return -ENOMEM;
entry->id = id;
entry->devid = devid;
if (type == IVHD_SPECIAL_IOAPIC)
list = &ioapic_map;
else
list = &hpet_map;
entry->id = id;
entry->devid = devid;
entry->cmd_line = cmd_line;
list_add_tail(&entry->list, list);
@ -929,7 +939,7 @@ static int __init init_iommu_from_acpi(struct amd_iommu *iommu,
PCI_FUNC(devid));
set_dev_entry_from_acpi(iommu, devid, e->flags, 0);
ret = add_special_device(type, handle, devid);
ret = add_special_device(type, handle, devid, false);
if (ret)
return ret;
break;

1
drivers/iommu/amd_iommu_types.h
View File

@ -592,6 +592,7 @@ struct devid_map {
struct list_head list;
u8 id;
u16 devid;
bool cmd_line;
};
/* Map HPET and IOAPIC ids to the devid used by the IOMMU */