[PATCH 02/13] KVM: reuse memslot in kvm_write_guest_page

From: Paolo Bonzini
Date: Thu Apr 30 2015 - 07:40:19 EST


From: Radim KrÄmÃÅ <rkrcmar@xxxxxxxxxx>

Saves one O(log N) search.

Signed-off-by: Radim KrÄmÃÅ <rkrcmar@xxxxxxxxxx>
Message-Id: <1428695247-27603-1-git-send-email-rkrcmar@xxxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
---
virt/kvm/kvm_main.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 90977418aeb6..b6d415156283 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1590,15 +1590,17 @@ int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
int offset, int len)
{
int r;
+ struct kvm_memory_slot *memslot;
unsigned long addr;

- addr = gfn_to_hva(kvm, gfn);
+ memslot = gfn_to_memslot(kvm, gfn);
+ addr = gfn_to_hva_memslot(memslot, gfn);
if (kvm_is_error_hva(addr))
return -EFAULT;
r = __copy_to_user((void __user *)addr + offset, data, len);
if (r)
return -EFAULT;
- mark_page_dirty(kvm, gfn);
+ mark_page_dirty_in_slot(kvm, memslot, gfn);
return 0;
}
EXPORT_SYMBOL_GPL(kvm_write_guest_page);
--
1.8.3.1


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