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xen-devel
[Xen-devel] Re: [Qemu-devel] [PATCH V10 06/15] xen: Add the Xen platform
On 02/24/2011 06:33 PM, Anthony Liguori wrote:
On 02/02/2011 08:49 AM, anthony.perard@xxxxxxxxxx wrote:
From: Steven Smith<ssmith@xxxxxxxxxxxxx>
Introduce a new emulated PCI device, specific to fully virtualized Xen
guests. The device is necessary for PV on HVM drivers to work.
Signed-off-by: Steven Smith<ssmith@xxxxxxxxxxxxx>
Signed-off-by: Anthony PERARD<anthony.perard@xxxxxxxxxx>
Signed-off-by: Stefano Stabellini<stefano.stabellini@xxxxxxxxxxxxx>
---
Makefile.target | 1 +
hw/hw.h | 3 +
hw/pc_piix.c | 4 +
hw/pci_ids.h | 2 +
hw/xen.h | 2 +
hw/xen_platform.c | 348
+++++++++++++++++++++++++++++++++++++++++++++++++++++
xen-stub.c | 4 +
7 files changed, 364 insertions(+), 0 deletions(-)
create mode 100644 hw/xen_platform.c
diff --git a/Makefile.target b/Makefile.target
index 00bb690..7a4fd72 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -215,6 +215,7 @@ obj-$(CONFIG_NO_XEN) += xen-stub.o
obj-$(CONFIG_XEN) += xen_backend.o xen_devconfig.o
obj-$(CONFIG_XEN) += xen_console.o xenfb.o xen_disk.o xen_nic.o
obj-i386-$(CONFIG_XEN) += xen_machine_pv.o xen_domainbuild.o
+obj-i386-$(CONFIG_XEN) += xen_platform.o
# Inter-VM PCI shared memory
obj-$(CONFIG_KVM) += ivshmem.o
diff --git a/hw/hw.h b/hw/hw.h
index dd993de..298df31 100644
--- a/hw/hw.h
+++ b/hw/hw.h
@@ -672,6 +672,9 @@ extern const VMStateDescription vmstate_i2c_slave;
#define VMSTATE_INT32_LE(_f, _s) \
VMSTATE_SINGLE(_f, _s, 0, vmstate_info_int32_le, int32_t)
+#define VMSTATE_UINT8_TEST(_f, _s, _t) \
+ VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_info_uint8, uint8_t)
+
#define VMSTATE_UINT16_TEST(_f, _s, _t) \
VMSTATE_SINGLE_TEST(_f, _s, _t, 0, vmstate_info_uint16, uint16_t)
diff --git a/hw/pc_piix.c b/hw/pc_piix.c
index 0ab8907..765877c 100644
--- a/hw/pc_piix.c
+++ b/hw/pc_piix.c
@@ -120,6 +120,10 @@ static void pc_init1(ram_addr_t ram_size,
pc_vga_init(pci_enabled? pci_bus: NULL);
+ if (xen_enabled()) {
+ pci_xen_platform_init(pci_bus);
+ }
+
/* init basic PC hardware */
pc_basic_device_init(isa_irq,&floppy_controller,&rtc_state);
diff --git a/hw/pci_ids.h b/hw/pci_ids.h
index ea3418c..6e9eabc 100644
--- a/hw/pci_ids.h
+++ b/hw/pci_ids.h
@@ -108,3 +108,5 @@
#define PCI_DEVICE_ID_INTEL_82371AB 0x7111
#define PCI_DEVICE_ID_INTEL_82371AB_2 0x7112
#define PCI_DEVICE_ID_INTEL_82371AB_3 0x7113
+
+#define PCI_VENDOR_ID_XENSOURCE 0x5853
diff --git a/hw/xen.h b/hw/xen.h
index 3984069..53a2ca4 100644
--- a/hw/xen.h
+++ b/hw/xen.h
@@ -29,6 +29,8 @@ static inline int xen_enabled(void)
#endif
}
+void pci_xen_platform_init(PCIBus *bus);
+
int xen_init(int smp_cpus);
#if defined(CONFIG_XEN)&& CONFIG_XEN_CTRL_INTERFACE_VERSION< 400
diff --git a/hw/xen_platform.c b/hw/xen_platform.c
new file mode 100644
index 0000000..383cfcf
--- /dev/null
+++ b/hw/xen_platform.c
@@ -0,0 +1,348 @@
+/*
+ * XEN platform pci device, formerly known as the event channel device
+ *
+ * Copyright (c) 2003-2004 Intel Corp.
+ * Copyright (c) 2006 XenSource
+ *
+ * Permission is hereby granted, free of charge, to any person
obtaining a copy
+ * of this software and associated documentation files (the
"Software"), to deal
+ * in the Software without restriction, including without limitation
the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "hw.h"
+#include "pc.h"
+#include "pci.h"
+#include "irq.h"
+#include "xen_common.h"
+#include "net.h"
+#include "xen_backend.h"
+#include "qemu-log.h"
+#include "rwhandler.h"
+
+#include<assert.h>
+#include<xenguest.h>
+
+//#define DEBUG_PLATFORM
+
+#ifdef DEBUG_PLATFORM
+#define DPRINTF(fmt, ...) do { \
+ fprintf(stderr, "xen_platform: " fmt, ## __VA_ARGS__); \
+} while (0)
+#else
+#define DPRINTF(fmt, ...) do { } while (0)
+#endif
+
+#define PFFLAG_ROM_LOCK 1 /* Sets whether ROM memory area is RW or RO */
+
+typedef struct PCIXenPlatformState {
+ PCIDevice pci_dev;
+ uint8_t flags; /* used only for version_id == 2 */
+ int drivers_blacklisted;
+ uint16_t driver_product_version;
+
+ /* Log from guest drivers */
+ char log_buffer[4096];
+ int log_buffer_off;
+} PCIXenPlatformState;
+
+#define XEN_PLATFORM_IOPORT 0x10
+
+/* Send bytes to syslog */
+static void log_writeb(PCIXenPlatformState *s, char val)
+{
+ if (val == '\n' || s->log_buffer_off == sizeof(s->log_buffer) - 1) {
+ /* Flush buffer */
+ s->log_buffer[s->log_buffer_off] = 0;
+ DPRINTF("%s\n", s->log_buffer);
This should go to a chardev.
Or it should just go away. Guests can already write to 0xe9 and see the
output on the host's "xm dmesg" ring and serial console.
Paolo
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