diff mbox series

[v8,06/15] KVM: pfncache: stop open-coding offset_in_page()

Message ID 20231121180223.12484-7-paul@xen.org
State New
Headers
Series KVM: xen: update shared_info and vcpu_info handling |

Commit Message

Paul Durrant Nov. 21, 2023, 6:02 p.m. UTC 
  From: Paul Durrant <pdurrant@amazon.com>

Some code in pfncache uses offset_in_page() but in other places it is open-
coded. Use offset_in_page() consistently everywhere.

Signed-off-by: Paul Durrant <pdurrant@amazon.com>
---
Cc: Sean Christopherson <seanjc@google.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: David Woodhouse <dwmw2@infradead.org>

v8:
 - New in this version.
---
 virt/kvm/pfncache.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Comments

David Woodhouse Nov. 21, 2023, 10:26 p.m. UTC | #1 
On Tue, 2023-11-21 at 18:02 +0000, Paul Durrant wrote:
> From: Paul Durrant <pdurrant@amazon.com>
> 
> Some code in pfncache uses offset_in_page() but in other places it is open-
> coded. Use offset_in_page() consistently everywhere.
> 
> Signed-off-by: Paul Durrant <pdurrant@amazon.com>

Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
diff mbox series

Patch

diff --git a/virt/kvm/pfncache.c b/virt/kvm/pfncache.c
index 6f4b537eb25b..0eeb034d0674 100644
--- a/virt/kvm/pfncache.c
+++ b/virt/kvm/pfncache.c
@@ -48,7 +48,7 @@  bool kvm_gpc_check(struct gfn_to_pfn_cache *gpc, unsigned long len)
 	if (!gpc->active)
 		return false;
 
-	if ((gpc->gpa & ~PAGE_MASK) + len > PAGE_SIZE)
+	if (offset_in_page(gpc->gpa) + len > PAGE_SIZE)
 		return false;
 
 	if (gpc->generation != slots->generation || kvm_is_error_hva(gpc->uhva))
@@ -192,7 +192,7 @@  static kvm_pfn_t hva_to_pfn_retry(struct gfn_to_pfn_cache *gpc)
 
 	gpc->valid = true;
 	gpc->pfn = new_pfn;
-	gpc->khva = new_khva + (gpc->gpa & ~PAGE_MASK);
+	gpc->khva = new_khva + offset_in_page(gpc->gpa);
 
 	/*
 	 * Put the reference to the _new_ pfn.  The pfn is now tracked by the
@@ -213,7 +213,7 @@  static int __kvm_gpc_refresh(struct gfn_to_pfn_cache *gpc, gpa_t gpa,
 			     unsigned long len)
 {
 	struct kvm_memslots *slots = kvm_memslots(gpc->kvm);
-	unsigned long page_offset = gpa & ~PAGE_MASK;
+	unsigned long page_offset = offset_in_page(gpa);
 	bool unmap_old = false;
 	unsigned long old_uhva;
 	kvm_pfn_t old_pfn;