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[RFC PATCH v11bis 26/26] i386/xen: Initialize Xen backends from pc_basic
From: |
David Woodhouse |
Subject: |
[RFC PATCH v11bis 26/26] i386/xen: Initialize Xen backends from pc_basic_device_init() for emulation |
Date: |
Thu, 16 Feb 2023 09:44:36 +0000 |
From: David Woodhouse <dwmw@amazon.co.uk>
Now that all the work is done to enable the PV backends to work without
actual Xen, instantiate the bus from pc_basic_device_init() for emulated
mode.
This allows us finally to launch an emulated Xen guest with PV disk.
qemu-system-x86_64 -serial mon:stdio -M q35 -cpu host -display none \
-m 1G -smp 2 -accel kvm,xen-version=0x4000a,kernel-irqchip=split \
-kernel bzImage -append "console=ttyS0 root=/dev/xvda1" \
-drive file=/var/lib/libvirt/images/fedora28.qcow2,if=none,id=disk \
-device xen-disk,drive=disk,vdev=xvda
If we use -M pc instead of q35, we can even add an IDE disk and boot a
guest image normally through grub. But q35 gives us AHCI and that isn't
unplugged by the Xen magic, so the guests ends up seeing "both" disks.
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
---
hw/i386/pc.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 5ec3518b9e..d464f171fa 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -102,6 +102,11 @@
#include "trace.h"
#include CONFIG_DEVICES
+#ifdef CONFIG_XEN_EMU
+#include "hw/xen/xen-legacy-backend.h"
+#include "hw/xen/xen-bus.h"
+#endif
+
/*
* Helper for setting model-id for CPU models that changed model-id
* depending on QEMU versions up to QEMU 2.4.
@@ -1316,6 +1321,8 @@ void pc_basic_device_init(struct PCMachineState *pcms,
if (pcms->bus) {
pci_create_simple(pcms->bus, -1, "xen-platform");
}
+ xen_bus_init();
+ xen_be_init();
}
#endif
--
2.39.0
- [RFC PATCH v11bis 23/26] hw/xen: Map guest XENSTORE_PFN grant in emulated Xenstore, (continued)
- [RFC PATCH v11bis 23/26] hw/xen: Map guest XENSTORE_PFN grant in emulated Xenstore, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 18/26] hw/xen: Avoid crash when backend watch fires too early, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 24/26] hw/xen: Implement soft reset for emulated gnttab, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 15/26] hw/xen: Use XEN_PAGE_SIZE in PV backend drivers, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 17/26] hw/xen: Build PV backend drivers for CONFIG_XEN_BUS, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 25/26] hw/xen: Subsume xen_be_register_common() into xen_be_init(), David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 21/26] hw/xen: Add emulated implementation of grant table operations, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 19/26] hw/xen: Only advertise ring-page-order for xen-block if gnttab supports it, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 14/26] hw/xen: Move xenstore_store_pv_console_info to xen_console.c, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 04/26] hw/xen: Implement XenStore transactions, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 26/26] i386/xen: Initialize Xen backends from pc_basic_device_init() for emulation,
David Woodhouse <=
- [RFC PATCH v11bis 06/26] xenstore perms WIP, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 03/26] hw/xen: Implement XenStore watches, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 22/26] hw/xen: Add emulated implementation of XenStore operations, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 02/26] hw/xen: Add basic XenStore tree walk and write/read/directory support, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 05/26] hw/xen: Watches on XenStore transactions, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 10/26] hw/xen: Add gnttab operations to allow redirection to internal emulation, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 09/26] hw/xen: Add evtchn operations to allow redirection to internal emulation, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 08/26] hw/xen: Create initial XenStore nodes, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 01/26] hw/xen: Add xenstore wire implementation and implementation stubs, David Woodhouse, 2023/02/16
- [RFC PATCH v11bis 13/26] hw/xen: Add xenstore operations to allow redirection to internal emulation, David Woodhouse, 2023/02/16