Merge branch 'xenfv-kvm-15' of git://git.infradead.org/users/dwmw2/qemu into HEAD

This adds support for emulating Xen under Linux/KVM, based on kernel
patches which have been present since Linux v5.12. As with the kernel
support, it's derived from work started by João Martins of Oracle in
2018.

This series just adds the basic platform support — CPUID, hypercalls,
event channels, a stub of XenStore.

A full single-tenant internal implementation of XenStore, and patches
to make QEMU's Xen PV drivers work with this Xen emulation, are waiting
in the wings to be submitted in a follow-on patch series.

As noted in the documentation, it's enabled by setting the xen-version
property on the KVM accelerator, e.g.:

 qemu-system-x86_64 -serial mon:stdio -M q35 -display none -m 1G -smp 2 \
    -accel kvm,xen-version=0x4000e,kernel-irqchip=split \
    -kernel vmlinuz-6.0.7-301.fc37.x86_64 \
    -append "console=ttyS0 root=/dev/sda1" \
    -drive file=/var/lib/libvirt/images/fedora28.qcow2,if=none,id=disk \
    -device ahci,id=ahci -device ide-hd,drive=disk,bus=ahci.0

Even before this was merged, we've already been using it to find and fix
bugs in the Linux kernel Xen guest support:

https://lore.kernel.org/all/4bffa69a949bfdc92c4a18e5a1c3cbb3b94a0d32.camel@infradead.org/
https://lore.kernel.org/all/871qnunycr.ffs@tglx/

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 5 insertions, 5 deletions

diff --git a/include/qemu/typedefs.h b/include/qemu/typedefs.h
index c7c8a85..df4b55a 100644
--- a/include/qemu/typedefs.h
+++ b/include/qemu/typedefs.h
@@ -49,6 +49,7 @@ typedef struct DeviceState DeviceState;
 typedef struct DirtyBitmapSnapshot DirtyBitmapSnapshot;
 typedef struct DisplayChangeListener DisplayChangeListener;
 typedef struct DriveInfo DriveInfo;
+typedef struct DumpState DumpState;
 typedef struct Error Error;
 typedef struct EventNotifier EventNotifier;
 typedef struct FlatView FlatView;
@@ -56,6 +57,7 @@ typedef struct FWCfgEntry FWCfgEntry;
 typedef struct FWCfgIoState FWCfgIoState;
 typedef struct FWCfgMemState FWCfgMemState;
 typedef struct FWCfgState FWCfgState;
+typedef struct GraphicHwOps GraphicHwOps;
 typedef struct HostMemoryBackend HostMemoryBackend;
 typedef struct I2CBus I2CBus;
 typedef struct I2SCodec I2SCodec;
@@ -90,10 +92,10 @@ typedef struct PCIDevice PCIDevice;
 typedef struct PCIEAERErr PCIEAERErr;
 typedef struct PCIEAERLog PCIEAERLog;
 typedef struct PCIEAERMsg PCIEAERMsg;
-typedef struct PCIESriovPF PCIESriovPF;
-typedef struct PCIESriovVF PCIESriovVF;
 typedef struct PCIEPort PCIEPort;
 typedef struct PCIESlot PCIESlot;
+typedef struct PCIESriovPF PCIESriovPF;
+typedef struct PCIESriovVF PCIESriovVF;
 typedef struct PCIExpressDevice PCIExpressDevice;
 typedef struct PCIExpressHost PCIExpressHost;
 typedef struct PCIHostDeviceAddress PCIHostDeviceAddress;
@@ -106,6 +108,7 @@ typedef struct QBool QBool;
 typedef struct QDict QDict;
 typedef struct QEMUBH QEMUBH;
 typedef struct QemuConsole QemuConsole;
+typedef struct QEMUCursor QEMUCursor;
 typedef struct QEMUFile QEMUFile;
 typedef struct QemuLockable QemuLockable;
 typedef struct QemuMutex QemuMutex;
@@ -132,9 +135,6 @@ typedef struct VirtIODevice VirtIODevice;
 typedef struct Visitor Visitor;
 typedef struct VMChangeStateEntry VMChangeStateEntry;
 typedef struct VMStateDescription VMStateDescription;
-typedef struct DumpState DumpState;
-typedef struct GraphicHwOps GraphicHwOps;
-typedef struct QEMUCursor QEMUCursor;
 
 /*
  * Pointer types