On 05/07/2024 10:51, Michael S. Tsirkin wrote:

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On Fri, Jul 05, 2024 at 05:03:17AM +0000, CLEMENT MATHIEU--DRIF wrote:


From: Clément Mathieu--Drif 
<clement.mathieu--d...@eviden.com><mailto:clement.mathieu--d...@eviden.com>

VTDIOTLBPageInvInfo.mask might not fit in an uint8_t.



I think what you mean is that is assigned values that might not
fit .... it's u8 ATM so of course it fits.

What about :
"The mask stored into VTDIOTLBPageInvInfo.mask might not fit in an uint8_t. Use 
uint64_t to avoid overflows"





Moreover, this field is used in binary operations with 64-bit addresses.



So what?

I thing the first part of the message is enough, the issue comes from the fact 
that the mask does not fit into the type






Signed-off-by: Clément Mathieu--Drif 
<clement.mathieu--d...@eviden.com><mailto:clement.mathieu--d...@eviden.com>
---
 hw/i386/intel_iommu_internal.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h
index cbc4030031..5fcbe2744f 100644
--- a/hw/i386/intel_iommu_internal.h
+++ b/hw/i386/intel_iommu_internal.h
@@ -436,7 +436,7 @@ struct VTDIOTLBPageInvInfo {
     uint16_t domain_id;
     uint32_t pasid;
     uint64_t addr;
-    uint8_t mask;
+    uint64_t mask;
 };
 typedef struct VTDIOTLBPageInvInfo VTDIOTLBPageInvInfo;

--
2.45.2





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