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accel/mshv: Add accelerator skeleton

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Introduce the initial scaffold for the MSHV (Microsoft Hypervisor)
accelerator backend. This includes the basic directory structure and
stub implementations needed to integrate with QEMU's accelerator
framework.

Signed-off-by: Magnus Kulke <magnuskulke@linux.microsoft.com>
Link: https://lore.kernel.org/r/20250916164847.77883-8-magnuskulke@linux.microsoft.com
[Move include of linux/mshv.h in the per-target section; create
 include/system/mshv_int.h. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Magnus Kulke
2025-10-08 19:17:29 +02:00
committed by Paolo Bonzini
parent a6d6878650
commit d0d2918f96
5 changed files with 204 additions and 0 deletions
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include/system/mshv.h
+12
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@@ -14,8 +14,17 @@
#ifndef QEMU_MSHV_H
#define QEMU_MSHV_H
#include "qemu/osdep.h"
#include "qemu/accel.h"
#include "hw/hyperv/hyperv-proto.h"
#include "hw/hyperv/hvhdk.h"
#include "qapi/qapi-types-common.h"
#include "system/memory.h"
#include "accel/accel-ops.h"
#ifdef COMPILING_PER_TARGET
#ifdef CONFIG_MSHV
#include <linux/mshv.h>
#define CONFIG_MSHV_IS_POSSIBLE
#endif
#else
@@ -30,6 +39,9 @@ extern bool mshv_allowed;
#endif
#define mshv_msi_via_irqfd_enabled() false
typedef struct MshvState MshvState;
extern MshvState *mshv_state;
/* interrupt */
int mshv_irqchip_add_msi_route(int vector, PCIDevice *dev);
int mshv_irqchip_update_msi_route(int virq, MSIMessage msg, PCIDevice *dev);
include/system/mshv_int.h
+41
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@@ -0,0 +1,41 @@
/*
* QEMU MSHV support
*
* Copyright Microsoft, Corp. 2025
*
* Authors: Ziqiao Zhou <ziqiaozhou@microsoft.com>
* Magnus Kulke <magnuskulke@microsoft.com>
* Jinank Jain <jinankjain@microsoft.com>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
*/
#ifndef QEMU_MSHV_INT_H
#define QEMU_MSHV_INT_H
struct AccelCPUState {
int cpufd;
bool dirty;
};
typedef struct MshvMemoryListener {
MemoryListener listener;
int as_id;
} MshvMemoryListener;
typedef struct MshvAddressSpace {
MshvMemoryListener *ml;
AddressSpace *as;
} MshvAddressSpace;
struct MshvState {
AccelState parent_obj;
int vm;
MshvMemoryListener memory_listener;
/* number of listeners */
int nr_as;
MshvAddressSpace *as;
};
#endif