apic_common: vapic_paddr synchronization fix
This patch postpones vapic_paddr initialization, which is performed during migration. When vapic_paddr is synchronized within the migration process, apic_common functions could operate with incorrect apic state, if it hadn't loaded yet. This patch postpones the synchronization until the virtual machine is started, ensuring that the whole virtual machine state has been loaded. Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru> Tested-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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@ -59,6 +59,7 @@ typedef struct VAPICROMState {
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GuestROMState rom_state;
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GuestROMState rom_state;
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size_t rom_size;
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size_t rom_size;
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bool rom_mapped_writable;
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bool rom_mapped_writable;
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VMChangeStateEntry *vmsentry;
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} VAPICROMState;
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} VAPICROMState;
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#define TYPE_VAPIC "kvmvapic"
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#define TYPE_VAPIC "kvmvapic"
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@ -734,11 +735,34 @@ static void do_vapic_enable(void *data)
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vapic_enable(s, cpu);
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vapic_enable(s, cpu);
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}
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}
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static int vapic_post_load(void *opaque, int version_id)
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static void kvmvapic_vm_state_change(void *opaque, int running,
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RunState state)
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{
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{
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VAPICROMState *s = opaque;
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VAPICROMState *s = opaque;
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uint8_t *zero;
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uint8_t *zero;
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if (!running) {
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return;
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}
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if (s->state == VAPIC_ACTIVE) {
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if (smp_cpus == 1) {
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run_on_cpu(first_cpu, do_vapic_enable, s);
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} else {
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zero = g_malloc0(s->rom_state.vapic_size);
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cpu_physical_memory_write(s->vapic_paddr, zero,
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s->rom_state.vapic_size);
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g_free(zero);
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}
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}
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qemu_del_vm_change_state_handler(s->vmsentry);
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}
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static int vapic_post_load(void *opaque, int version_id)
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{
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VAPICROMState *s = opaque;
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/*
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/*
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* The old implementation of qemu-kvm did not provide the state
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* The old implementation of qemu-kvm did not provide the state
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* VAPIC_STANDBY. Reconstruct it.
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* VAPIC_STANDBY. Reconstruct it.
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@ -752,17 +776,8 @@ static int vapic_post_load(void *opaque, int version_id)
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return -1;
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return -1;
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}
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}
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}
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}
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if (s->state == VAPIC_ACTIVE) {
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if (smp_cpus == 1) {
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run_on_cpu(first_cpu, do_vapic_enable, s);
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} else {
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zero = g_malloc0(s->rom_state.vapic_size);
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cpu_physical_memory_write(s->vapic_paddr, zero,
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s->rom_state.vapic_size);
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g_free(zero);
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}
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}
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s->vmsentry = qemu_add_vm_change_state_handler(kvmvapic_vm_state_change, s);
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return 0;
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return 0;
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}
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}
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