76036a5fc7
Add handling of POST_MESSAGE hypercall. For that, add an interface to regsiter a handler for the messages arrived from the guest on a particular connection id (IOW set up a message connection in Hyper-V speak). Signed-off-by: Roman Kagan <rkagan@virtuozzo.com> Message-Id: <20180921082217.29481-10-rkagan@virtuozzo.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
102 lines
2.8 KiB
C
102 lines
2.8 KiB
C
/*
|
|
* QEMU KVM Hyper-V support
|
|
*
|
|
* Copyright (C) 2015 Andrey Smetanin <asmetanin@virtuozzo.com>
|
|
*
|
|
* Authors:
|
|
* Andrey Smetanin <asmetanin@virtuozzo.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "qemu/main-loop.h"
|
|
#include "hyperv.h"
|
|
#include "hw/hyperv/hyperv.h"
|
|
#include "hyperv-proto.h"
|
|
|
|
int hyperv_x86_synic_add(X86CPU *cpu)
|
|
{
|
|
hyperv_synic_add(CPU(cpu));
|
|
return 0;
|
|
}
|
|
|
|
void hyperv_x86_synic_reset(X86CPU *cpu)
|
|
{
|
|
hyperv_synic_reset(CPU(cpu));
|
|
}
|
|
|
|
void hyperv_x86_synic_update(X86CPU *cpu)
|
|
{
|
|
CPUX86State *env = &cpu->env;
|
|
bool enable = env->msr_hv_synic_control & HV_SYNIC_ENABLE;
|
|
hwaddr msg_page_addr = (env->msr_hv_synic_msg_page & HV_SIMP_ENABLE) ?
|
|
(env->msr_hv_synic_msg_page & TARGET_PAGE_MASK) : 0;
|
|
hwaddr event_page_addr = (env->msr_hv_synic_evt_page & HV_SIEFP_ENABLE) ?
|
|
(env->msr_hv_synic_evt_page & TARGET_PAGE_MASK) : 0;
|
|
hyperv_synic_update(CPU(cpu), enable, msg_page_addr, event_page_addr);
|
|
}
|
|
|
|
static void async_synic_update(CPUState *cs, run_on_cpu_data data)
|
|
{
|
|
qemu_mutex_lock_iothread();
|
|
hyperv_x86_synic_update(X86_CPU(cs));
|
|
qemu_mutex_unlock_iothread();
|
|
}
|
|
|
|
int kvm_hv_handle_exit(X86CPU *cpu, struct kvm_hyperv_exit *exit)
|
|
{
|
|
CPUX86State *env = &cpu->env;
|
|
|
|
switch (exit->type) {
|
|
case KVM_EXIT_HYPERV_SYNIC:
|
|
if (!cpu->hyperv_synic) {
|
|
return -1;
|
|
}
|
|
|
|
switch (exit->u.synic.msr) {
|
|
case HV_X64_MSR_SCONTROL:
|
|
env->msr_hv_synic_control = exit->u.synic.control;
|
|
break;
|
|
case HV_X64_MSR_SIMP:
|
|
env->msr_hv_synic_msg_page = exit->u.synic.msg_page;
|
|
break;
|
|
case HV_X64_MSR_SIEFP:
|
|
env->msr_hv_synic_evt_page = exit->u.synic.evt_page;
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* this will run in this cpu thread before it returns to KVM, but in a
|
|
* safe environment (i.e. when all cpus are quiescent) -- this is
|
|
* necessary because memory hierarchy is being changed
|
|
*/
|
|
async_safe_run_on_cpu(CPU(cpu), async_synic_update, RUN_ON_CPU_NULL);
|
|
|
|
return 0;
|
|
case KVM_EXIT_HYPERV_HCALL: {
|
|
uint16_t code = exit->u.hcall.input & 0xffff;
|
|
bool fast = exit->u.hcall.input & HV_HYPERCALL_FAST;
|
|
uint64_t param = exit->u.hcall.params[0];
|
|
|
|
switch (code) {
|
|
case HV_POST_MESSAGE:
|
|
exit->u.hcall.result = hyperv_hcall_post_message(param, fast);
|
|
break;
|
|
case HV_SIGNAL_EVENT:
|
|
exit->u.hcall.result = hyperv_hcall_signal_event(param, fast);
|
|
break;
|
|
default:
|
|
exit->u.hcall.result = HV_STATUS_INVALID_HYPERCALL_CODE;
|
|
}
|
|
return 0;
|
|
}
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|