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platform_kernel-5.15
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KVM: Fix dirty bit tracking for slots with large pages 

When slot is already allocated and being asked to be tracked we need
to break the large pages.

This code flush the mmu when someone ask a slot to start dirty bit
tracking.

Cc: stable@kernel.org
Signed-off-by: Izik Eidus <ieidus@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Izik Eidus 2009-06-10 19:23:24 +03:00 committed by Avi Kivity
parent 4075ea8c54
commit e244584fe3
1 changed files with 2 additions and 0 deletions
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2
virt/kvm/kvm_main.c
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@ -1194,6 +1194,8 @@ int __kvm_set_memory_region(struct kvm *kvm,
if (!new.dirty_bitmap)
goto out_free;
memset(new.dirty_bitmap, 0, dirty_bytes);
if (old.npages)
kvm_arch_flush_shadow(kvm);
}
#endif /* not defined CONFIG_S390 */