Commit e5e1f606 authored by Joerg Roedel's avatar Joerg Roedel

AMD IOMMU: add parameter to disable device isolation

Impact: add a new AMD IOMMU kernel command line parameter
Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 4e14e833
......@@ -295,6 +295,8 @@ and is between 256 and 4096 characters. It is defined in the file
isolate - enable device isolation (each device, as far
as possible, will get its own protection
domain)
share - put every device behind one IOMMU into the
same protection domain
fullflush - enable flushing of IO/TLB entries when
they are unmapped. Otherwise they are
flushed before they will be reused, which
......
......@@ -1213,6 +1213,8 @@ static int __init parse_amd_iommu_options(char *str)
for (; *str; ++str) {
if (strncmp(str, "isolate", 7) == 0)
amd_iommu_isolate = 1;
if (strncmp(str, "share", 5) == 0)
amd_iommu_isolate = 0;
if (strncmp(str, "fullflush", 11) == 0)
amd_iommu_unmap_flush = true;
}
......
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