kpriv/linux-hardened
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

amd-iommu: print ivmd information to dmesg when requested

Browse source 
Add information about device memory mapping requirements for the IOMMU
as described in the IVRS ACPI table to the kernel log if amd_iommu_dump
was specified on the kernel command line.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2009-05-20 16:24:21 +02:00
parent 42a698f40a
commit 02acc43a29
1 changed files with 11 additions and 0 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

@ -983,6 +983,7 @@ static int __init init_exclusion_range(struct ivmd_header *m)
static int __init init_unity_map_range(struct ivmd_header *m)
{
struct unity_map_entry *e = 0;
char *s;
e = kzalloc(sizeof(*e), GFP_KERNEL);
if (e == NULL)
@ -991,13 +992,16 @@ static int __init init_unity_map_range(struct ivmd_header *m)
switch (m->type) {
default:
case ACPI_IVMD_TYPE:
s = "IVMD_TYPEi\t\t\t";
e->devid_start = e->devid_end = m->devid;
break;
case ACPI_IVMD_TYPE_ALL:
s = "IVMD_TYPE_ALL\t\t";
e->devid_start = 0;
e->devid_end = amd_iommu_last_bdf;
break;
case ACPI_IVMD_TYPE_RANGE:
s = "IVMD_TYPE_RANGE\t\t";
e->devid_start = m->devid;
e->devid_end = m->aux;
break;
@ -1006,6 +1010,13 @@ static int __init init_unity_map_range(struct ivmd_header *m)
e->address_end = e->address_start + PAGE_ALIGN(m->range_length);
e->prot = m->flags >> 1;
DUMP_printk("%s devid_start: %02x:%02x.%x devid_end: %02x:%02x.%x"
" range_start: %016llx range_end: %016llx flags: %x\n", s,
PCI_BUS(e->devid_start), PCI_SLOT(e->devid_start),
PCI_FUNC(e->devid_start), PCI_BUS(e->devid_end),
PCI_SLOT(e->devid_end), PCI_FUNC(e->devid_end),
e->address_start, e->address_end, m->flags);
list_add_tail(&e->list, &amd_iommu_unity_map);
return 0;