06152b89db
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
/*
|
|
* QEMU KVM stub
|
|
*
|
|
* Copyright Red Hat, Inc. 2010
|
|
*
|
|
* Author: Paolo Bonzini <pbonzini@redhat.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 "sysemu/kvm.h"
|
|
#include "hw/pci/msi.h"
|
|
|
|
KVMState *kvm_state;
|
|
bool kvm_kernel_irqchip;
|
|
bool kvm_async_interrupts_allowed;
|
|
bool kvm_resamplefds_allowed;
|
|
bool kvm_msi_via_irqfd_allowed;
|
|
bool kvm_gsi_routing_allowed;
|
|
bool kvm_gsi_direct_mapping;
|
|
bool kvm_allowed;
|
|
bool kvm_readonly_mem_allowed;
|
|
bool kvm_msi_use_devid;
|
|
|
|
void kvm_flush_coalesced_mmio_buffer(void)
|
|
{
|
|
}
|
|
|
|
void kvm_cpu_synchronize_state(CPUState *cpu)
|
|
{
|
|
}
|
|
|
|
bool kvm_has_sync_mmu(void)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
int kvm_on_sigbus(int code, void *addr)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
int kvm_irqchip_add_msi_route(KVMRouteChange *c, int vector, PCIDevice *dev)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
void kvm_init_irq_routing(KVMState *s)
|
|
{
|
|
}
|
|
|
|
void kvm_irqchip_release_virq(KVMState *s, int virq)
|
|
{
|
|
}
|
|
|
|
int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
|
|
PCIDevice *dev)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
void kvm_irqchip_commit_routes(KVMState *s)
|
|
{
|
|
}
|
|
|
|
void kvm_irqchip_add_change_notifier(Notifier *n)
|
|
{
|
|
}
|
|
|
|
void kvm_irqchip_remove_change_notifier(Notifier *n)
|
|
{
|
|
}
|
|
|
|
void kvm_irqchip_change_notify(void)
|
|
{
|
|
}
|
|
|
|
int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
|
|
EventNotifier *rn, int virq)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
|
|
int virq)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
unsigned int kvm_get_max_memslots(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
unsigned int kvm_get_free_memslots(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void kvm_init_cpu_signals(CPUState *cpu)
|
|
{
|
|
abort();
|
|
}
|
|
|
|
bool kvm_arm_supports_user_irq(void)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
bool kvm_dirty_ring_enabled(void)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
uint32_t kvm_dirty_ring_size(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
bool kvm_hwpoisoned_mem(void)
|
|
{
|
|
return false;
|
|
}
|