@@ -486,9 +486,23 @@ but has no xl support.
## Security
+### Driver Domains
+
+ Status: Supported, with caveats
+
+"Driver domains" means allowing non-Domain 0 domains
+with access to physical devices to act as back-ends.
+
+See the appropriate "Device Passthrough" section
+for more information about security support.
+
### Device Model Stub Domains
- Status: Supported
+ Status: Supported, with caveats
+
+Vulnerabilities of a device model stub domain
+to a hostile driver domain (either compromised or untrusted)
+are excluded from security support.
### KCONFIG Expert
@@ -559,6 +573,26 @@ Virtual Performance Management Unit for HVM guests
Disabled by default (enable with hypervisor command line option).
This feature is not security supported: see http://xenbits.xen.org/xsa/advisory-163.html
+### x86/PCI Device Passthrough
+
+ Status, x86 PV: Supported, with caveats
+ Status, x86 HVM: Supported, with caveats
+
+Only systems using IOMMUs are supported.
+
+Not compatible with migration, populate-on-demand, altp2m,
+introspection, memory sharing, or memory paging.
+
+Because of hardware limitations
+(affecting any operating system or hypervisor),
+it is generally not safe to use this feature
+to expose a physical device to completely untrusted guests.
+However, this feature can still confer significant security benefit
+when used to remove drivers and backends from domain 0
+(i.e., Driver Domains).
+
+XXX See docs/PCI-IOMMU-bugs.txt for more information.
+
### ARM/Non-PCI device passthrough
Status: Supported, not security supported
Signed-off-by: George Dunlap <george.dunlap@citrix.com> --- Changes since v2: - Separate PV and HVM passthrough (excluding PVH by implication) - + not compatible with PoD - 'will be' -> 'are' NB that we don't seem to have the referenced file yet; left as a reference. CC: Ian Jackson <ian.jackson@citrix.com> CC: Wei Liu <wei.liu2@citrix.com> CC: Andrew Cooper <andrew.cooper3@citrix.com> CC: Jan Beulich <jbeulich@suse.com> CC: Stefano Stabellini <sstabellini@kernel.org> CC: Konrad Wilk <konrad.wilk@oracle.com> CC: Tim Deegan <tim@xen.org> CC: Rich Persaud <persaur@gmail.com> CC: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com> CC: Christopher Clark <christopher.w.clark@gmail.com> CC: James McKenzie <james.mckenzie@bromium.com> --- SUPPORT.md | 36 +++++++++++++++++++++++++++++++++++- 1 file changed, 35 insertions(+), 1 deletion(-)