Add amd iommu emulation for Xen.

PATCH New Wei Wang 1 participant 1 message Sep 26, 2012

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Wei Wang

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2012-09-26 14:44 UTC #0 lore raw

PATCH 1/1 Add amd iommu emulation for Xen.

HI,
Attached patch adds amd iommu emulation for Xen. Please review it. Thanks,
Wei

From 122517435641384e4f5e36eaad8302ff273648e8 Mon Sep 17 00:00:00 2001
From: Wei Wang <[email protected]>
Date: Wed, 26 Sep 2012 16:43:40 +0200
Subject: [PATCH] Add amd iommu emulation for Xen.

To passthrough amd southern islands series gpu to guest, a virtual iommu device must be registered on qemu pci bus. It uses a new hypercall xc_domain_update_iommu_msi to notify xen the msi vector of iommu.

Signed-off-by Wei Wang <[email protected]>

---
 hw/i386/Makefile.objs |    2 +-
 hw/pc_piix.c          |    6 ++
 hw/xen_iommu.c        |  191 +++++++++++++++++++++++++++++++++++++++++++++++++
 hw/xen_pt.h           |    1 +
 4 files changed, 199 insertions(+), 1 deletions(-)
 create mode 100644 hw/xen_iommu.c

hw/i386/Makefile.objs +1 -1

index 8c764bb..8b231ab 100644
@@ -8,7 +8,7 @@ obj-y += pc_piix.o
 obj-y += pc_sysfw.o
 obj-$(CONFIG_XEN) += xen_platform.o xen_apic.o
 obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen-host-pci-device.o
-obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen_pt.o xen_pt_config_init.o xen_pt_msi.o
+obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen_pt.o xen_pt_config_init.o xen_pt_msi.o xen_iommu.o
 obj-y += kvm/
 obj-$(CONFIG_SPICE) += qxl.o qxl-logger.o qxl-render.o

hw/pc_piix.c +6 -0

index fd5898f..0b5d034 100644
@@ -46,6 +46,9 @@
 #ifdef CONFIG_XEN
 #  include <xen/hvm/hvm_info_table.h>
 #endif
+#ifdef CONFIG_XEN_PCI_PASSTHROUGH
+#  include "xen_pt.h"
+#endif
 
 #define MAX_IDE_BUS 2

@@ -228,6 +231,9 @@ static void pc_init1(MemoryRegion *system_memory,
     pc_vga_init(isa_bus, pci_enabled ? pci_bus : NULL);
     if (xen_enabled()) {
         pci_create_simple(pci_bus, -1, "xen-platform");
+#ifdef CONFIG_XEN_PCI_PASSTHROUGH
+        xen_pt_iommu_create(pci_bus);
+#endif
     }
 
     /* init basic PC hardware */

hw/xen_iommu.c new file +191 -0

191 lines not on this page · raw message

hw/xen_pt.h +1 -0

index 112477a..b54a0fb 100644
@@ -291,6 +291,7 @@ void xen_pt_msix_delete(XenPCIPassthroughState *s);
 int xen_pt_msix_update(XenPCIPassthroughState *s);
 int xen_pt_msix_update_remap(XenPCIPassthroughState *s, int bar_index);
 void xen_pt_msix_disable(XenPCIPassthroughState *s);
+void xen_pt_iommu_create(PCIBus *pci_bus);
 
 static inline bool xen_pt_has_msix_mapping(XenPCIPassthroughState *s, int bar)
 {

Signature · 1 line

1.7.4