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| author | Keir Fraser <keir.fraser@citrix.com> | 2010-03-05 14:31:14 +0000 |
|---|---|---|
| committer | Keir Fraser <keir.fraser@citrix.com> | 2010-03-05 14:31:14 +0000 |
| commit | 96b84001d58fa3c9ed8bbcfe1f9d3ae097373508 (patch) | |
| tree | efe1fc67a7c975d660c08cad7af53703f0e8e75c | |
| parent | b3bc7b059a068664f325762c9b9f21c188437c0c (diff) | |
| download | xen-96b84001d58fa3c9ed8bbcfe1f9d3ae097373508.tar.gz xen-96b84001d58fa3c9ed8bbcfe1f9d3ae097373508.tar.bz2 xen-96b84001d58fa3c9ed8bbcfe1f9d3ae097373508.zip | |
vt-d: ensure x2apic is not enabled accidently if no DRHD at all.
Thanks to Jan Beulich for pointing this out.
Signed-off-by: Dexuan Cui <dexuan.cui@intel.com>
| -rw-r--r-- | xen/drivers/passthrough/vtd/intremap.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/xen/drivers/passthrough/vtd/intremap.c b/xen/drivers/passthrough/vtd/intremap.c index 87c639d501..9459a81736 100644 --- a/xen/drivers/passthrough/vtd/intremap.c +++ b/xen/drivers/passthrough/vtd/intremap.c @@ -131,6 +131,9 @@ int iommu_supports_eim(void) if ( !iommu_enabled || !iommu_qinval || !iommu_intremap ) return 0; + if ( list_empty(&acpi_drhd_units) ) + return 0; + for_each_drhd_unit ( drhd ) if ( !ecap_queued_inval(drhd->ecap) || !ecap_intr_remap(drhd->ecap) || |