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KVM: s390: a utility function for migration

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Introduce a utility function that will be used later on for storage
attributes migration, and use it in kvm_main.c to replace existing code
that does the same thing.

Signed-off-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com>
Message-Id: <1525106005-13931-2-git-send-email-imbrenda@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Claudio Imbrenda 2018-04-30 18:33:24 +02:00 committed by Christian Borntraeger
parent 0230cae75d
commit 03133347b4
2 changed files with 8 additions and 1 deletions
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7
include/linux/kvm_host.h
View File

@ -309,6 +309,13 @@ static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memsl
return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
}
static inline unsigned long *kvm_second_dirty_bitmap(struct kvm_memory_slot *memslot)
{
unsigned long len = kvm_dirty_bitmap_bytes(memslot);
return memslot->dirty_bitmap + len / sizeof(*memslot->dirty_bitmap);
}
struct kvm_s390_adapter_int {
u64 ind_addr;
u64 summary_addr;

2
virt/kvm/kvm_main.c
View File

@ -1169,7 +1169,7 @@ int kvm_get_dirty_log_protect(struct kvm *kvm,
n = kvm_dirty_bitmap_bytes(memslot);
dirty_bitmap_buffer = dirty_bitmap + n / sizeof(long);
dirty_bitmap_buffer = kvm_second_dirty_bitmap(memslot);
memset(dirty_bitmap_buffer, 0, n);
spin_lock(&kvm->mmu_lock);