debuggers.hg
changeset 20970:8616a82df1c0
VT-d: ensure zapping ACPI DMAR signature in acpi_parse_dmar
VT-d is owned by Xen hypervisor. Xen zaps ACPI DMAR signature to
prevent dom0 to use VT-d. This patch changes the direct return when
DMAR width is zero, instead zaps ACPI DMAR signature before return.
Signed-off-by: Weidong Han <weidong.han@intel.com>
VT-d is owned by Xen hypervisor. Xen zaps ACPI DMAR signature to
prevent dom0 to use VT-d. This patch changes the direct return when
DMAR width is zero, instead zaps ACPI DMAR signature before return.
Signed-off-by: Weidong Han <weidong.han@intel.com>
| author | Keir Fraser <keir.fraser@citrix.com> |
|---|---|
| date | Thu Feb 11 19:48:58 2010 +0000 (2010-02-11) |
| parents | b4ad00da6960 |
| children | f5da4b37f9ca |
| files | xen/drivers/passthrough/vtd/dmar.c |
line diff
1.1 --- a/xen/drivers/passthrough/vtd/dmar.c Wed Feb 10 13:30:57 2010 +0000 1.2 +++ b/xen/drivers/passthrough/vtd/dmar.c Thu Feb 11 19:48:58 2010 +0000 1.3 @@ -623,7 +623,8 @@ static int __init acpi_parse_dmar(struct 1.4 if ( !dmar->width ) 1.5 { 1.6 dprintk(XENLOG_WARNING VTDPREFIX, "Zero: Invalid DMAR width\n"); 1.7 - return -EINVAL; 1.8 + ret = -EINVAL; 1.9 + goto out; 1.10 } 1.11 1.12 dmar_host_address_width = dmar->width + 1;