From 5bb064dcdeb7ab341e2f8a3e2fc34faa63b1662c Mon Sep 17 00:00:00 2001 From: Zhang Xiantao Date: Sun, 18 Nov 2007 20:29:43 +0800 Subject: KVM: Portability: Move kvm_vcpu_ioctl_get_dirty_log to arch-specific file Meanwhile keep the interface in common, and leave as more logic in common as possible. Signed-off-by: Zhang Xiantao Signed-off-by: Avi Kivity --- drivers/kvm/x86.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) (limited to 'drivers/kvm/x86.c') diff --git a/drivers/kvm/x86.c b/drivers/kvm/x86.c index 9618fcba887e..935e2769b787 100644 --- a/drivers/kvm/x86.c +++ b/drivers/kvm/x86.c @@ -937,6 +937,37 @@ static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) return r; } +/* + * Get (and clear) the dirty memory log for a memory slot. + */ +int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, + struct kvm_dirty_log *log) +{ + int r; + int n; + struct kvm_memory_slot *memslot; + int is_dirty = 0; + + mutex_lock(&kvm->lock); + + r = kvm_get_dirty_log(kvm, log, &is_dirty); + if (r) + goto out; + + /* If nothing is dirty, don't bother messing with page tables. */ + if (is_dirty) { + kvm_mmu_slot_remove_write_access(kvm, log->slot); + kvm_flush_remote_tlbs(kvm); + memslot = &kvm->memslots[log->slot]; + n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; + memset(memslot->dirty_bitmap, 0, n); + } + r = 0; +out: + mutex_unlock(&kvm->lock); + return r; +} + long kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) { -- cgit v1.2.2