x86: Filter out physical address that can't be handled by DMAR units

[jailhouse.git] / hypervisor / arch / x86 / vtd.c

diff --git a/hypervisor/arch/x86/vtd.c b/hypervisor/arch/x86/vtd.c
index 28faf51a374831cd6ed7863a46b9ccfa24c5875e..6d36394c8196dd188cb3cc9469565579aa0d24fb 100644 (file)
--- a/hypervisor/arch/x86/vtd.c
+++ b/hypervisor/arch/x86/vtd.c
@@ -773,6 +773,9 @@ int iommu_map_memory_region(struct cell *cell,
        if (!(mem->flags & JAILHOUSE_MEM_DMA))
                return 0;
 
+       if (mem->virt_start & BIT_MASK(63, 12 + 9 * dmar_pt_levels))
+               return trace_error(-E2BIG);
+
        if (mem->flags & JAILHOUSE_MEM_READ)
                flags |= VTD_PAGE_READ;
        if (mem->flags & JAILHOUSE_MEM_WRITE)