[Xen-changelog] [xen-unstable] VT-d: relax source qualifier for MSI of phantom functions

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Jan Beulich <jbeulich@xxxxxxxx>
# Date 1357559812 -3600
# Node ID b514b7118958327605e33dd387944832bc8d734a
# Parent  c9a01b396cb4eaedef30e9a6ed615115a9f8bfc5
VT-d: relax source qualifier for MSI of phantom functions

With ordinary requests allowed to come from phantom functions, the
remapping tables ought to be set up to allow for MSI triggers to come
from other than the "real" device too.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Acked-by: "Zhang, Xiantao" <xiantao.zhang@xxxxxxxxx>
---


diff -r c9a01b396cb4 -r b514b7118958 xen/drivers/passthrough/vtd/intremap.c
--- a/xen/drivers/passthrough/vtd/intremap.c    Mon Jan 07 12:55:42 2013 +0100
+++ b/xen/drivers/passthrough/vtd/intremap.c    Mon Jan 07 12:56:52 2013 +0100
@@ -442,13 +442,22 @@ static void set_msi_source_id(struct pci
     devfn = pdev->devfn;
     switch ( pdev->type )
     {
+        unsigned int sq;
+
     case DEV_TYPE_PCIe_BRIDGE:
     case DEV_TYPE_PCIe2PCI_BRIDGE:
     case DEV_TYPE_LEGACY_PCI_BRIDGE:
         break;
 
     case DEV_TYPE_PCIe_ENDPOINT:
-        set_ire_sid(ire, SVT_VERIFY_SID_SQ, SQ_ALL_16, PCI_BDF2(bus, devfn));
+        switch ( pdev->phantom_stride )
+        {
+        case 1: sq = SQ_13_IGNORE_3; break;
+        case 2: sq = SQ_13_IGNORE_2; break;
+        case 4: sq = SQ_13_IGNORE_1; break;
+        default: sq = SQ_ALL_16; break;
+        }
+        set_ire_sid(ire, SVT_VERIFY_SID_SQ, sq, PCI_BDF2(bus, devfn));
         break;
 
     case DEV_TYPE_PCI:

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