WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

[Xen-devel] [PATCH V10 07/15] piix_pci: Introduces Xen specific call for

To: QEMU-devel <qemu-devel@xxxxxxxxxx>
Subject: [Xen-devel] [PATCH V10 07/15] piix_pci: Introduces Xen specific call for irq.
From: anthony.perard@xxxxxxxxxx
Date: Wed, 2 Feb 2011 14:49:24 +0000
Cc: Anthony PERARD <anthony.perard@xxxxxxxxxx>, Xen Devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Anthony Liguori <anthony@xxxxxxxxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Delivery-date: Wed, 02 Feb 2011 06:55:25 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <1296658172-16609-1-git-send-email-anthony.perard@xxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <1296658172-16609-1-git-send-email-anthony.perard@xxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
From: Anthony PERARD <anthony.perard@xxxxxxxxxx>

This patch introduces Xen specific call in piix_pci.

The specific part for Xen is in write_config, set_irq and get_pirq.

Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Acked-by: Alexander Graf <agraf@xxxxxxx>
---
 hw/piix_pci.c |   28 ++++++++++++++++++++++++++--
 hw/xen.h      |    6 ++++++
 xen-all.c     |   31 +++++++++++++++++++++++++++++++
 xen-stub.c    |   13 +++++++++++++
 4 files changed, 76 insertions(+), 2 deletions(-)

diff --git a/hw/piix_pci.c b/hw/piix_pci.c
index 358da58..152fcc0 100644
--- a/hw/piix_pci.c
+++ b/hw/piix_pci.c
@@ -29,6 +29,7 @@
 #include "isa.h"
 #include "sysbus.h"
 #include "range.h"
+#include "xen.h"
 
 /*
  * I440FX chipset data sheet.
@@ -151,6 +152,13 @@ static void i440fx_write_config(PCIDevice *dev,
     }
 }
 
+static void i440fx_write_config_xen(PCIDevice *dev,
+                                    uint32_t address, uint32_t val, int len)
+{
+    xen_piix_pci_write_config_client(address, val, len);
+    i440fx_write_config(dev, address, val, len);
+}
+
 static int i440fx_load_old(QEMUFile* f, void *opaque, int version_id)
 {
     PCII440FXState *d = opaque;
@@ -230,13 +238,21 @@ PCIBus *i440fx_init(PCII440FXState **pi440fx_state, int 
*piix3_devfn, qemu_irq *
     s->bus = b;
     qdev_init_nofail(dev);
 
-    d = pci_create_simple(b, 0, "i440FX");
+    if (xen_enabled()) {
+        d = pci_create_simple(b, 0, "i440FX-xen");
+    } else {
+        d = pci_create_simple(b, 0, "i440FX");
+    }
     *pi440fx_state = DO_UPCAST(PCII440FXState, dev, d);
 
     piix3 = DO_UPCAST(PIIX3State, dev,
                       pci_create_simple_multifunction(b, -1, true, "PIIX3"));
     piix3->pic = pic;
-    pci_bus_irqs(b, piix3_set_irq, pci_slot_get_pirq, piix3, 4);
+    if (xen_enabled()) {
+        pci_bus_irqs(b, xen_piix3_set_irq, xen_pci_slot_get_pirq, piix3, 4);
+    } else {
+        pci_bus_irqs(b, piix3_set_irq, pci_slot_get_pirq, piix3, 4);
+    }
     (*pi440fx_state)->piix3 = piix3;
 
     *piix3_devfn = piix3->dev.devfn;
@@ -352,6 +368,14 @@ static PCIDeviceInfo i440fx_info[] = {
         .init         = i440fx_initfn,
         .config_write = i440fx_write_config,
     },{
+        .qdev.name    = "i440FX-xen",
+        .qdev.desc    = "Host bridge",
+        .qdev.size    = sizeof(PCII440FXState),
+        .qdev.vmsd    = &vmstate_i440fx,
+        .qdev.no_user = 1,
+        .init         = i440fx_initfn,
+        .config_write = i440fx_write_config_xen,
+    },{
         .qdev.name    = "PIIX3",
         .qdev.desc    = "ISA bridge",
         .qdev.size    = sizeof(PIIX3State),
diff --git a/hw/xen.h b/hw/xen.h
index 53a2ca4..2a53f8b 100644
--- a/hw/xen.h
+++ b/hw/xen.h
@@ -8,6 +8,8 @@
  */
 #include <inttypes.h>
 
+#include "qemu-common.h"
+
 /* xen-machine.c */
 enum xen_mode {
     XEN_EMULATE = 0,  // xen emulation, using xenner (default)
@@ -29,6 +31,10 @@ static inline int xen_enabled(void)
 #endif
 }
 
+int xen_pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num);
+void xen_piix3_set_irq(void *opaque, int irq_num, int level);
+void xen_piix_pci_write_config_client(uint32_t address, uint32_t val, int len);
+
 void pci_xen_platform_init(PCIBus *bus);
 
 int xen_init(int smp_cpus);
diff --git a/xen-all.c b/xen-all.c
index 8d77d42..123decb 100644
--- a/xen-all.c
+++ b/xen-all.c
@@ -8,9 +8,40 @@
 
 #include "config.h"
 
+#include "hw/pci.h"
 #include "hw/xen_common.h"
 #include "hw/xen_backend.h"
 
+/* Xen specific function for piix pci */
+
+int xen_pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num)
+{
+    return irq_num + ((pci_dev->devfn >> 3) << 2);
+}
+
+void xen_piix3_set_irq(void *opaque, int irq_num, int level)
+{
+    xc_hvm_set_pci_intx_level(xen_xc, xen_domid, 0, 0, irq_num >> 2,
+                              irq_num & 3, level);
+}
+
+void xen_piix_pci_write_config_client(uint32_t address, uint32_t val, int len)
+{
+    int i;
+
+    /* Scan for updates to PCI link routes (0x60-0x63). */
+    for (i = 0; i < len; i++) {
+        uint8_t v = (val >> (8 * i)) & 0xff;
+        if (v & 0x80) {
+            v = 0;
+        }
+        v &= 0xf;
+        if (((address + i) >= 0x60) && ((address + i) <= 0x63)) {
+            xc_hvm_set_pci_link_route(xen_xc, xen_domid, address + i - 0x60, 
v);
+        }
+    }
+}
+
 /* Initialise Xen */
 
 int xen_init(int smp_cpus)
diff --git a/xen-stub.c b/xen-stub.c
index a6d5850..ba95537 100644
--- a/xen-stub.c
+++ b/xen-stub.c
@@ -11,6 +11,19 @@
 #include "qemu-common.h"
 #include "hw/xen.h"
 
+int xen_pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num)
+{
+    return -1;
+}
+
+void xen_piix3_set_irq(void *opaque, int irq_num, int level)
+{
+}
+
+void xen_piix_pci_write_config_client(uint32_t address, uint32_t val, int len)
+{
+}
+
 void pci_xen_platform_init(PCIBus *bus)
 {
 }
-- 
1.7.1


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel

<Prev in Thread] Current Thread [Next in Thread>