A memory page poisoned from the hypervisor level is no longer readable. The migration of a VM will crash Qemu when it tries to read the memory address space and stumbles on the poisoned page with a similar stack trace: Program terminated with signal SIGBUS, Bus error. #0 _mm256_loadu_si256 #1 buffer_zero_avx2 #2 select_accel_fn #3 buffer_is_zero #4 save_zero_page #5 ram_save_target_page_legacy #6 ram_save_host_page #7 ram_find_and_save_block #8 ram_save_iterate #9 qemu_savevm_state_iterate #10 migration_iteration_run #11 migration_thread #12 qemu_thread_start To avoid this VM crash during the migration, prevent the migration when a known hardware poison exists on the VM. Signed-off-by: William Roche <william.roche@oracle.com> Link: https://lore.kernel.org/r/20240130190640.139364-2-william.roche@oracle.com Signed-off-by: Peter Xu <peterx@redhat.com>
		
			
				
	
	
		
			132 lines
		
	
	
		
			2.1 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
			
		
		
	
	
			132 lines
		
	
	
		
			2.1 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
/*
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 * QEMU KVM stub
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 *
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 * Copyright Red Hat, Inc. 2010
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 *
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 * Author: Paolo Bonzini     <pbonzini@redhat.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 "sysemu/kvm.h"
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#include "hw/pci/msi.h"
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KVMState *kvm_state;
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bool kvm_kernel_irqchip;
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bool kvm_async_interrupts_allowed;
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bool kvm_resamplefds_allowed;
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bool kvm_msi_via_irqfd_allowed;
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bool kvm_gsi_routing_allowed;
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bool kvm_gsi_direct_mapping;
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bool kvm_allowed;
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bool kvm_readonly_mem_allowed;
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bool kvm_msi_use_devid;
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void kvm_flush_coalesced_mmio_buffer(void)
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{
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}
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void kvm_cpu_synchronize_state(CPUState *cpu)
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{
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}
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bool kvm_has_sync_mmu(void)
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{
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    return false;
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}
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int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr)
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{
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    return 1;
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}
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int kvm_on_sigbus(int code, void *addr)
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{
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    return 1;
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}
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int kvm_irqchip_add_msi_route(KVMRouteChange *c, int vector, PCIDevice *dev)
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{
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    return -ENOSYS;
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}
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void kvm_init_irq_routing(KVMState *s)
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{
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}
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void kvm_irqchip_release_virq(KVMState *s, int virq)
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{
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}
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int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
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                                 PCIDevice *dev)
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{
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    return -ENOSYS;
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}
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void kvm_irqchip_commit_routes(KVMState *s)
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{
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}
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void kvm_irqchip_add_change_notifier(Notifier *n)
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{
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}
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void kvm_irqchip_remove_change_notifier(Notifier *n)
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{
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}
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void kvm_irqchip_change_notify(void)
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{
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}
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int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
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                                       EventNotifier *rn, int virq)
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{
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    return -ENOSYS;
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}
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int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
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                                          int virq)
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{
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    return -ENOSYS;
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}
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unsigned int kvm_get_max_memslots(void)
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{
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    return 0;
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}
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unsigned int kvm_get_free_memslots(void)
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{
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    return 0;
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}
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void kvm_init_cpu_signals(CPUState *cpu)
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{
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    abort();
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}
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bool kvm_arm_supports_user_irq(void)
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{
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    return false;
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}
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bool kvm_dirty_ring_enabled(void)
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{
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    return false;
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}
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uint32_t kvm_dirty_ring_size(void)
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{
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    return 0;
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}
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bool kvm_hwpoisoned_mem(void)
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{
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    return false;
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}
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