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KVM: MMU: introduce kvm_zap_rmapp

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Split kvm_unmap_rmapp and introduce kvm_zap_rmapp which will be used in the
later patch

Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Xiao Guangrong 2015-05-13 14:42:25 +08:00 committed by Paolo Bonzini
parent d77aa73c70
commit 6a49f85c7a
1 changed files with 18 additions and 14 deletions
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32
arch/x86/kvm/mmu.c
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@ -1349,24 +1349,28 @@ static bool rmap_write_protect(struct kvm *kvm, u64 gfn)
return write_protected; return write_protected;
} }
static bool kvm_zap_rmapp(struct kvm *kvm, unsigned long *rmapp)
{
u64 *sptep;
struct rmap_iterator iter;
bool flush = false;
while ((sptep = rmap_get_first(*rmapp, &iter))) {
BUG_ON(!(*sptep & PT_PRESENT_MASK));
rmap_printk("%s: spte %p %llx.\n", __func__, sptep, *sptep);
drop_spte(kvm, sptep);
flush = true;
}
return flush;
}
static int kvm_unmap_rmapp(struct kvm *kvm, unsigned long *rmapp, static int kvm_unmap_rmapp(struct kvm *kvm, unsigned long *rmapp,
struct kvm_memory_slot *slot, gfn_t gfn, int level, struct kvm_memory_slot *slot, gfn_t gfn, int level,
unsigned long data) unsigned long data)
{ {
u64 *sptep; return kvm_zap_rmapp(kvm, rmapp);
struct rmap_iterator iter;
int need_tlb_flush = 0;
while ((sptep = rmap_get_first(*rmapp, &iter))) {
BUG_ON(!(*sptep & PT_PRESENT_MASK));
rmap_printk("kvm_rmap_unmap_hva: spte %p %llx gfn %llx (%d)\n",
sptep, *sptep, gfn, level);
drop_spte(kvm, sptep);
need_tlb_flush = 1;
}
return need_tlb_flush;
} }
static int kvm_set_pte_rmapp(struct kvm *kvm, unsigned long *rmapp, static int kvm_set_pte_rmapp(struct kvm *kvm, unsigned long *rmapp,