KVM: do not treat noslot pfn as a error pfn
This patch filters noslot pfn out from error pfns based on Marcelo comment:
noslot pfn is not a error pfn
After this patch,
- is_noslot_pfn indicates that the gfn is not in slot
- is_error_pfn indicates that the gfn is in slot but the error is occurred
when translate the gfn to pfn
- is_error_noslot_pfn indicates that the pfn either it is error pfns or it
is noslot pfn
And is_invalid_pfn can be removed, it makes the code more clean
Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
diff --git a/virt/kvm/iommu.c b/virt/kvm/iommu.c
index 18e1e30..4a340cb 100644
--- a/virt/kvm/iommu.c
+++ b/virt/kvm/iommu.c
@@ -52,7 +52,7 @@
end_gfn = gfn + (size >> PAGE_SHIFT);
gfn += 1;
- if (is_error_pfn(pfn))
+ if (is_error_noslot_pfn(pfn))
return pfn;
while (gfn < end_gfn)
@@ -106,7 +106,7 @@
* important because we unmap and unpin in 4kb steps later.
*/
pfn = kvm_pin_pages(slot, gfn, page_size);
- if (is_error_pfn(pfn)) {
+ if (is_error_noslot_pfn(pfn)) {
gfn += 1;
continue;
}
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index be70035..2fb7319 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1208,7 +1208,7 @@
return KVM_PFN_ERR_RO_FAULT;
if (kvm_is_error_hva(addr))
- return KVM_PFN_ERR_BAD;
+ return KVM_PFN_NOSLOT;
/* Do not map writable pfn in the readonly memslot. */
if (writable && memslot_is_readonly(slot)) {
@@ -1290,7 +1290,7 @@
static struct page *kvm_pfn_to_page(pfn_t pfn)
{
- if (is_error_pfn(pfn))
+ if (is_error_noslot_pfn(pfn))
return KVM_ERR_PTR_BAD_PAGE;
if (kvm_is_mmio_pfn(pfn)) {
@@ -1322,7 +1322,7 @@
void kvm_release_pfn_clean(pfn_t pfn)
{
- if (!is_error_pfn(pfn) && !kvm_is_mmio_pfn(pfn))
+ if (!is_error_noslot_pfn(pfn) && !kvm_is_mmio_pfn(pfn))
put_page(pfn_to_page(pfn));
}
EXPORT_SYMBOL_GPL(kvm_release_pfn_clean);