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hv:add per-vm lock for vm & vcpu state change

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-- replace global hypercall lock with per-vm lock
-- add spinlock protection for vm & vcpu state change

v1-->v2:
   change get_vm_lock/put_vm_lock parameter from vm_id to vm
   move lock obtain before vm state check
   move all lock from vmcall.c to hypercall.c

Tracked-On: #4958
Signed-off-by: Mingqiang Chi <mingqiang.chi@intel.com
Reviewed-by: Jason Chen CJ <jason.cj.chen@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Mingqiang Chi
2020-07-13 18:22:57 +08:00
parent e5c5337886
commit aa89eb3541
8 changed files with 96 additions and 58 deletions
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19
hypervisor/arch/x86/guest/vm.c
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@@ -394,7 +394,8 @@ int32_t create_vm(uint16_t vm_id, uint64_t pcpu_bitmap, struct acrn_vm_config *v
/* Allocate memory for virtual machine */
vm = &vm_array[vm_id];
(void)memset((void *)vm, 0U, sizeof(struct acrn_vm));
/* the vm_state lock field need to remain unchanged in vm data structure */
(void)memset((void *)&vm->arch_vm, 0U, (sizeof(struct acrn_vm) - sizeof(spinlock_t)));
vm->vm_id = vm_id;
vm->hw.created_vcpus = 0U;
@@ -437,7 +438,6 @@ int32_t create_vm(uint16_t vm_id, uint64_t pcpu_bitmap, struct acrn_vm_config *v
if (status == 0) {
prepare_epc_vm_memmap(vm);
spinlock_init(&vm->vlapic_mode_lock);
spinlock_init(&vm->ept_lock);
spinlock_init(&vm->emul_mmio_lock);
@@ -891,3 +891,18 @@ bool need_shutdown_vm(uint16_t pcpu_id)
{
return bitmap_test_and_clear_lock(NEED_SHUTDOWN_VM, &per_cpu(pcpu_flag, pcpu_id));
}
/*
* @pre vm != NULL
*/
void get_vm_lock(struct acrn_vm *vm)
{
spinlock_obtain(&vm->vm_state_lock);
}
/*
* @pre vm != NULL
*/
void put_vm_lock(struct acrn_vm *vm)
{
spinlock_release(&vm->vm_state_lock);
}