From: Jan Beulich <jbeulich@suse.com>
Date: Mon, 7 Jan 2013 11:56:52 +0000 (+0100)
Subject: VT-d: relax source qualifier for MSI of phantom functions
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~7476
X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com/cgi/%22https:/%22bookmarks://%22Dat/%22http:/www.example.com/cgi/%22https:/%22bookmarks:/%22Dat?a=commitdiff_plain;h=c9af51eb96319f8248ababea592282bc6215fc30;p=xen.git

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@suse.com>
Acked-by: "Zhang, Xiantao" <xiantao.zhang@intel.com>
---

diff --git a/xen/drivers/passthrough/vtd/intremap.c b/xen/drivers/passthrough/vtd/intremap.c
index aaf9301896..8b45e5ae8b 100644
--- a/xen/drivers/passthrough/vtd/intremap.c
+++ b/xen/drivers/passthrough/vtd/intremap.c
@@ -442,13 +442,22 @@ static void set_msi_source_id(struct pci_dev *pdev, struct iremap_entry *ire)
     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: