a9dc68d9b2
Signed-off-by: Claudio Fontana <cfontana@suse.de> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20201212155530.23098-2-cfontana@suse.de> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
102 lines
2.9 KiB
C
102 lines
2.9 KiB
C
/*
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* QEMU KVM Hyper-V support
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*
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* Copyright (C) 2015 Andrey Smetanin <asmetanin@virtuozzo.com>
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*
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* Authors:
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* Andrey Smetanin <asmetanin@virtuozzo.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#include "qemu/osdep.h"
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#include "qemu/main-loop.h"
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#include "hyperv.h"
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#include "hw/hyperv/hyperv.h"
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#include "hyperv-proto.h"
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int hyperv_x86_synic_add(X86CPU *cpu)
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{
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hyperv_synic_add(CPU(cpu));
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return 0;
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}
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void hyperv_x86_synic_reset(X86CPU *cpu)
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{
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hyperv_synic_reset(CPU(cpu));
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}
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void hyperv_x86_synic_update(X86CPU *cpu)
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{
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CPUX86State *env = &cpu->env;
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bool enable = env->msr_hv_synic_control & HV_SYNIC_ENABLE;
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hwaddr msg_page_addr = (env->msr_hv_synic_msg_page & HV_SIMP_ENABLE) ?
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(env->msr_hv_synic_msg_page & TARGET_PAGE_MASK) : 0;
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hwaddr event_page_addr = (env->msr_hv_synic_evt_page & HV_SIEFP_ENABLE) ?
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(env->msr_hv_synic_evt_page & TARGET_PAGE_MASK) : 0;
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hyperv_synic_update(CPU(cpu), enable, msg_page_addr, event_page_addr);
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}
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static void async_synic_update(CPUState *cs, run_on_cpu_data data)
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{
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qemu_mutex_lock_iothread();
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hyperv_x86_synic_update(X86_CPU(cs));
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qemu_mutex_unlock_iothread();
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}
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int kvm_hv_handle_exit(X86CPU *cpu, struct kvm_hyperv_exit *exit)
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{
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CPUX86State *env = &cpu->env;
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switch (exit->type) {
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case KVM_EXIT_HYPERV_SYNIC:
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if (!hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNIC)) {
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return -1;
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}
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switch (exit->u.synic.msr) {
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case HV_X64_MSR_SCONTROL:
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env->msr_hv_synic_control = exit->u.synic.control;
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break;
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case HV_X64_MSR_SIMP:
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env->msr_hv_synic_msg_page = exit->u.synic.msg_page;
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break;
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case HV_X64_MSR_SIEFP:
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env->msr_hv_synic_evt_page = exit->u.synic.evt_page;
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break;
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default:
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return -1;
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}
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/*
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* this will run in this cpu thread before it returns to KVM, but in a
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* safe environment (i.e. when all cpus are quiescent) -- this is
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* necessary because memory hierarchy is being changed
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*/
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async_safe_run_on_cpu(CPU(cpu), async_synic_update, RUN_ON_CPU_NULL);
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return 0;
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case KVM_EXIT_HYPERV_HCALL: {
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uint16_t code = exit->u.hcall.input & 0xffff;
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bool fast = exit->u.hcall.input & HV_HYPERCALL_FAST;
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uint64_t param = exit->u.hcall.params[0];
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switch (code) {
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case HV_POST_MESSAGE:
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exit->u.hcall.result = hyperv_hcall_post_message(param, fast);
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break;
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case HV_SIGNAL_EVENT:
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exit->u.hcall.result = hyperv_hcall_signal_event(param, fast);
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break;
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default:
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exit->u.hcall.result = HV_STATUS_INVALID_HYPERCALL_CODE;
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}
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return 0;
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}
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default:
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return -1;
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}
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}
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