[v1,06/12] xen/hvmlite: Initialize PCI
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Message ID 1453498558-6028-7-git-send-email-boris.ostrovsky@oracle.com
State New, archived
Headers show

Commit Message

Boris Ostrovsky Jan. 22, 2016, 9:35 p.m. UTC
HVMlite guests need PCI frontend and always have PV devices

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---
 arch/x86/pci/xen.c                 |    2 +-
 arch/x86/xen/platform-pci-unplug.c |    4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

Comments

Roger Pau Monné Jan. 25, 2016, 10:21 a.m. UTC | #1
El 22/01/16 a les 22.35, Boris Ostrovsky ha escrit:
> HVMlite guests need PCI frontend and always have PV devices

We still haven't discussed how to perform pci-passthrough for HVMlite
guests. I admit there's a big chance that we are going to use the PV
pcifront driver but there's no guarantee about it yet, so I would just
leave it out for the moment.

Roger.

Patch
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diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c
index ff31ab4..d847f7d 100644
--- a/arch/x86/pci/xen.c
+++ b/arch/x86/pci/xen.c
@@ -405,7 +405,7 @@  static void xen_teardown_msi_irq(unsigned int irq)
 
 int __init pci_xen_init(void)
 {
-	if (!xen_pv_domain() || xen_initial_domain())
+	if ((!xen_pv_domain() && !xen_hvmlite) || xen_initial_domain())
 		return -ENODEV;
 
 	printk(KERN_INFO "PCI: setting up Xen PCI frontend stub\n");
diff --git a/arch/x86/xen/platform-pci-unplug.c b/arch/x86/xen/platform-pci-unplug.c
index 9586ff3..802ec90 100644
--- a/arch/x86/xen/platform-pci-unplug.c
+++ b/arch/x86/xen/platform-pci-unplug.c
@@ -73,8 +73,8 @@  bool xen_has_pv_devices(void)
 	if (!xen_domain())
 		return false;
 
-	/* PV domains always have them. */
-	if (xen_pv_domain())
+	/* PV and HVMlite domains always have them. */
+	if (xen_pv_domain() || xen_hvmlite)
 		return true;
 
 	/* And user has xen_platform_pci=0 set in guest config as