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[Qemu-devel] [PATCH v5 09/18] intel_iommu: vtd_slpt_level_shift check le


From: Peter Xu
Subject: [Qemu-devel] [PATCH v5 09/18] intel_iommu: vtd_slpt_level_shift check level
Date: Tue, 24 Jan 2017 18:26:02 +0800

This helps in debugging incorrect level passed in.

Signed-off-by: Peter Xu <address@hidden>
---
 hw/i386/intel_iommu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 2c13b7b..6f5f68a 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -168,6 +168,7 @@ static gboolean vtd_hash_remove_by_domain(gpointer key, 
gpointer value,
 /* The shift of an addr for a certain level of paging structure */
 static inline uint32_t vtd_slpt_level_shift(uint32_t level)
 {
+    assert(level != 0);
     return VTD_PAGE_SHIFT_4K + (level - 1) * VTD_SL_LEVEL_BITS;
 }
 
-- 
2.7.4




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