KVM: Add general accessors to read and write guest memory
Signed-off-by: Izik Eidus <izike@qumranet.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index 439873a..894fd45 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -1387,33 +1387,28 @@
static int init_rmode_tss(struct kvm* kvm)
{
- struct page *p1, *p2, *p3;
gfn_t fn = rmode_tss_base(kvm) >> PAGE_SHIFT;
- char *page;
+ u16 data = 0;
+ int r;
- p1 = gfn_to_page(kvm, fn++);
- p2 = gfn_to_page(kvm, fn++);
- p3 = gfn_to_page(kvm, fn);
-
- if (!p1 || !p2 || !p3) {
- kvm_printf(kvm,"%s: gfn_to_page failed\n", __FUNCTION__);
+ r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
+ if (r < 0)
return 0;
- }
-
- page = kmap_atomic(p1, KM_USER0);
- clear_page(page);
- *(u16*)(page + 0x66) = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE;
- kunmap_atomic(page, KM_USER0);
-
- page = kmap_atomic(p2, KM_USER0);
- clear_page(page);
- kunmap_atomic(page, KM_USER0);
-
- page = kmap_atomic(p3, KM_USER0);
- clear_page(page);
- *(page + RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1) = ~0;
- kunmap_atomic(page, KM_USER0);
-
+ data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE;
+ r = kvm_write_guest_page(kvm, fn++, &data, 0x66, sizeof(u16));
+ if (r < 0)
+ return 0;
+ r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE);
+ if (r < 0)
+ return 0;
+ r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
+ if (r < 0)
+ return 0;
+ data = ~0;
+ r = kvm_write_guest_page(kvm, fn, &data, RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1,
+ sizeof(u8));
+ if (r < 0)
+ return 0;
return 1;
}