[Xen-devel] [PATCH][XSA-59] VT-d: suppress UR signaling for further desktop chipsets

["Jan Beulich" <JBeulich@xxxxxxxx>]

This extends commit d6cb14b34f ("VT-d: suppress UR signaling for
desktop chipsets") as per the finally obtained list of affected
chipsets from Intel.

Also pad the IDs we had listed there before to full 4 hex digits.

This is CVE-2013-3495 / XSA-59.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
---
I already raised the obvious questions connected to the appearance of
Broadwell here: Are its server chipsets affected then too, i.e. does
the server side set of IDs need extension as well? Is the issue going
to be fixed in hardware at some point, or will we need to indefinitely
extend the set of IDs here?

--- a/xen/drivers/passthrough/vtd/quirks.c
+++ b/xen/drivers/passthrough/vtd/quirks.c
@@ -466,10 +466,12 @@ void pci_vtd_quirk(const struct pci_dev 
                action, seg, bus, dev, func);
         break;
 
-    case 0x100: case 0x104: case 0x108: /* Sandybridge */
-    case 0x150: case 0x154: case 0x158: /* Ivybridge */
-    case 0xa04: /* Haswell ULT */
-    case 0xc00: case 0xc04: case 0xc08: /* Haswell */
+    case 0x0040: case 0x0044: case 0x0048: /* Nehalem/Westmere */
+    case 0x0100: case 0x0104: case 0x0108: /* Sandybridge */
+    case 0x0150: case 0x0154: case 0x0158: /* Ivybridge */
+    case 0x0a04: /* Haswell ULT */
+    case 0x0c00: case 0x0c04: case 0x0c08: /* Haswell */
+    case 0x1600: case 0x1604: case 0x1608: /* Broadwell */
         bar = pci_conf_read32(seg, bus, dev, func, 0x6c);
         bar = (bar << 32) | pci_conf_read32(seg, bus, dev, func, 0x68);
         pa = bar & 0x7ffffff000UL; /* bits 12...38 */

Attachment: VT-d-mask-UR-more-desktop-chipsets.patch
Description: Text document

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