We confirmed with VT-d hardware team that 1ms is large enough for IOMMU
internal flush. So We can change the DMAR_OPERATION_TIMEOUT from 1000 ms
to 1 ms.
Signed-off-by: Quan Xu <quan...@intel.com>
CC: Jan Beulich <jbeul...@suse.com>
CC: Andrew Cooper <andrew.coop...@citrix.com>
CC: Feng Wu <feng...@intel.com>
CC: Kevin Tian <kevin.t...@intel.com>
---
xen/drivers/passthrough/vtd/dmar.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/xen/drivers/passthrough/vtd/dmar.h
b/xen/drivers/passthrough/vtd/dmar.h
index 729b603..4b14368 100644
--- a/xen/drivers/passthrough/vtd/dmar.h
+++ b/xen/drivers/passthrough/vtd/dmar.h
@@ -106,7 +106,7 @@ struct acpi_atsr_unit *acpi_find_matched_atsr_unit(const
struct pci_dev *);
#define RMRR_TYPE 2
#define ATSR_TYPE 3
-#define DMAR_OPERATION_TIMEOUT MILLISECS(1000)
+#define DMAR_OPERATION_TIMEOUT MILLISECS(1)
#define IOMMU_WAIT_OP(iommu, offset, op, cond, sts) \
do { \
--
1.9.1
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