mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 12:43:55 +08:00
iommu/vt-d: Mark firmware tainted if RMRR fails sanity check
RMRR entries describe memory regions that are DMA targets for devices
outside the kernel's control.
RMRR entries that fail the sanity check are pointing to regions of
memory that the firmware did not tell the kernel are reserved or
otherwise should not be used.
Instead of aborting DMAR processing, this commit marks the firmware
as tainted. These RMRRs will still be identity mapped, otherwise,
some devices, e.x. graphic devices, will not work during boot.
Signed-off-by: Barret Rhoden <brho@google.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Fixes: f036c7fa0a
("iommu/vt-d: Check VT-d RMRR region in BIOS is reported as reserved")
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
parent
53291622e2
commit
f5a68bb075
@ -4458,12 +4458,16 @@ int __init dmar_parse_one_rmrr(struct acpi_dmar_header *header, void *arg)
|
|||||||
{
|
{
|
||||||
struct acpi_dmar_reserved_memory *rmrr;
|
struct acpi_dmar_reserved_memory *rmrr;
|
||||||
struct dmar_rmrr_unit *rmrru;
|
struct dmar_rmrr_unit *rmrru;
|
||||||
int ret;
|
|
||||||
|
|
||||||
rmrr = (struct acpi_dmar_reserved_memory *)header;
|
rmrr = (struct acpi_dmar_reserved_memory *)header;
|
||||||
ret = arch_rmrr_sanity_check(rmrr);
|
if (arch_rmrr_sanity_check(rmrr))
|
||||||
if (ret)
|
WARN_TAINT(1, TAINT_FIRMWARE_WORKAROUND,
|
||||||
return ret;
|
"Your BIOS is broken; bad RMRR [%#018Lx-%#018Lx]\n"
|
||||||
|
"BIOS vendor: %s; Ver: %s; Product Version: %s\n",
|
||||||
|
rmrr->base_address, rmrr->end_address,
|
||||||
|
dmi_get_system_info(DMI_BIOS_VENDOR),
|
||||||
|
dmi_get_system_info(DMI_BIOS_VERSION),
|
||||||
|
dmi_get_system_info(DMI_PRODUCT_VERSION));
|
||||||
|
|
||||||
rmrru = kzalloc(sizeof(*rmrru), GFP_KERNEL);
|
rmrru = kzalloc(sizeof(*rmrru), GFP_KERNEL);
|
||||||
if (!rmrru)
|
if (!rmrru)
|
||||||
|
Loading…
Reference in New Issue
Block a user