qemu/hw/i386/vmport.c
Liran Alon d8f23d619c hw/i386/vmport: Introduce vmport.h
No functional change. This is mere refactoring.

Suggested-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Liran Alon <liran.alon@oracle.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200312165431.82118-8-liran.alon@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-06-10 12:09:45 -04:00

242 lines
7.3 KiB
C

/*
* QEMU VMPort emulation
*
* Copyright (C) 2007 Hervé Poussineau
*
* 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.
*/
/*
* Guest code that interacts with this virtual device can be found
* in VMware open-vm-tools open-source project:
* https://github.com/vmware/open-vm-tools
*/
#include "qemu/osdep.h"
#include "hw/isa/isa.h"
#include "hw/i386/vmport.h"
#include "hw/qdev-properties.h"
#include "sysemu/hw_accel.h"
#include "qemu/log.h"
#include "cpu.h"
#include "trace.h"
#define VMPORT_CMD_GETVERSION 0x0a
#define VMPORT_CMD_GETRAMSIZE 0x14
#define VMPORT_ENTRIES 0x2c
#define VMPORT_MAGIC 0x564D5868
/* Compatibility flags for migration */
#define VMPORT_COMPAT_READ_SET_EAX_BIT 0
#define VMPORT_COMPAT_SIGNAL_UNSUPPORTED_CMD_BIT 1
#define VMPORT_COMPAT_REPORT_VMX_TYPE_BIT 2
#define VMPORT_COMPAT_READ_SET_EAX \
(1 << VMPORT_COMPAT_READ_SET_EAX_BIT)
#define VMPORT_COMPAT_SIGNAL_UNSUPPORTED_CMD \
(1 << VMPORT_COMPAT_SIGNAL_UNSUPPORTED_CMD_BIT)
#define VMPORT_COMPAT_REPORT_VMX_TYPE \
(1 << VMPORT_COMPAT_REPORT_VMX_TYPE_BIT)
#define VMPORT(obj) OBJECT_CHECK(VMPortState, (obj), TYPE_VMPORT)
typedef struct VMPortState {
ISADevice parent_obj;
MemoryRegion io;
VMPortReadFunc *func[VMPORT_ENTRIES];
void *opaque[VMPORT_ENTRIES];
uint32_t vmware_vmx_version;
uint8_t vmware_vmx_type;
uint32_t compat_flags;
} VMPortState;
static VMPortState *port_state;
void vmport_register(unsigned char command, VMPortReadFunc *func, void *opaque)
{
if (command >= VMPORT_ENTRIES) {
return;
}
trace_vmport_register(command, func, opaque);
port_state->func[command] = func;
port_state->opaque[command] = opaque;
}
static uint64_t vmport_ioport_read(void *opaque, hwaddr addr,
unsigned size)
{
VMPortState *s = opaque;
CPUState *cs = current_cpu;
X86CPU *cpu = X86_CPU(cs);
CPUX86State *env = &cpu->env;
unsigned char command;
uint32_t eax;
cpu_synchronize_state(cs);
eax = env->regs[R_EAX];
if (eax != VMPORT_MAGIC) {
goto err;
}
command = env->regs[R_ECX];
trace_vmport_command(command);
if (command >= VMPORT_ENTRIES || !s->func[command]) {
qemu_log_mask(LOG_UNIMP, "vmport: unknown command %x\n", command);
goto err;
}
eax = s->func[command](s->opaque[command], addr);
goto out;
err:
if (s->compat_flags & VMPORT_COMPAT_SIGNAL_UNSUPPORTED_CMD) {
eax = UINT32_MAX;
}
out:
/*
* The call above to cpu_synchronize_state() gets vCPU registers values
* to QEMU but also cause QEMU to write QEMU vCPU registers values to
* vCPU implementation (e.g. Accelerator such as KVM) just before
* resuming guest.
*
* Therefore, in order to make IOPort return value propagate to
* guest EAX, we need to explicitly update QEMU EAX register value.
*/
if (s->compat_flags & VMPORT_COMPAT_READ_SET_EAX) {
cpu->env.regs[R_EAX] = eax;
}
return eax;
}
static void vmport_ioport_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
X86CPU *cpu = X86_CPU(current_cpu);
cpu->env.regs[R_EAX] = vmport_ioport_read(opaque, addr, 4);
}
static uint32_t vmport_cmd_get_version(void *opaque, uint32_t addr)
{
X86CPU *cpu = X86_CPU(current_cpu);
cpu->env.regs[R_EBX] = VMPORT_MAGIC;
if (port_state->compat_flags & VMPORT_COMPAT_REPORT_VMX_TYPE) {
cpu->env.regs[R_ECX] = port_state->vmware_vmx_type;
}
return port_state->vmware_vmx_version;
}
static uint32_t vmport_cmd_ram_size(void *opaque, uint32_t addr)
{
X86CPU *cpu = X86_CPU(current_cpu);
cpu->env.regs[R_EBX] = 0x1177;
return ram_size;
}
static const MemoryRegionOps vmport_ops = {
.read = vmport_ioport_read,
.write = vmport_ioport_write,
.impl = {
.min_access_size = 4,
.max_access_size = 4,
},
.endianness = DEVICE_LITTLE_ENDIAN,
};
static void vmport_realizefn(DeviceState *dev, Error **errp)
{
ISADevice *isadev = ISA_DEVICE(dev);
VMPortState *s = VMPORT(dev);
memory_region_init_io(&s->io, OBJECT(s), &vmport_ops, s, "vmport", 1);
isa_register_ioport(isadev, &s->io, 0x5658);
port_state = s;
/* Register some generic port commands */
vmport_register(VMPORT_CMD_GETVERSION, vmport_cmd_get_version, NULL);
vmport_register(VMPORT_CMD_GETRAMSIZE, vmport_cmd_ram_size, NULL);
}
static Property vmport_properties[] = {
/* Used to enforce compatibility for migration */
DEFINE_PROP_BIT("x-read-set-eax", VMPortState, compat_flags,
VMPORT_COMPAT_READ_SET_EAX_BIT, true),
DEFINE_PROP_BIT("x-signal-unsupported-cmd", VMPortState, compat_flags,
VMPORT_COMPAT_SIGNAL_UNSUPPORTED_CMD_BIT, true),
DEFINE_PROP_BIT("x-report-vmx-type", VMPortState, compat_flags,
VMPORT_COMPAT_REPORT_VMX_TYPE_BIT, true),
/* Default value taken from open-vm-tools code VERSION_MAGIC definition */
DEFINE_PROP_UINT32("vmware-vmx-version", VMPortState,
vmware_vmx_version, 6),
/*
* Value determines which VMware product type host report itself to guest.
*
* Most guests are fine with exposing host as VMware ESX server.
* Some legacy/proprietary guests hard-code a given type.
*
* For a complete list of values, refer to enum VMXType at open-vm-tools
* project (Defined at lib/include/vm_vmx_type.h).
*
* Reasonable options:
* 0 - Unset
* 1 - VMware Express (deprecated)
* 2 - VMware ESX Server
* 3 - VMware Server (Deprecated)
* 4 - VMware Workstation
* 5 - ACE 1.x (Deprecated)
*/
DEFINE_PROP_UINT8("vmware-vmx-type", VMPortState, vmware_vmx_type, 2),
DEFINE_PROP_END_OF_LIST(),
};
static void vmport_class_initfn(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = vmport_realizefn;
/* Reason: realize sets global port_state */
dc->user_creatable = false;
device_class_set_props(dc, vmport_properties);
}
static const TypeInfo vmport_info = {
.name = TYPE_VMPORT,
.parent = TYPE_ISA_DEVICE,
.instance_size = sizeof(VMPortState),
.class_init = vmport_class_initfn,
};
static void vmport_register_types(void)
{
type_register_static(&vmport_info);
}
type_init(vmport_register_types)