[PATCH v3 10/13] KVM/X86: hyperv: Use kvm_vcpu_map in synic_clear_sint_msg_pending

[KarimAllah Ahmed]

Use kvm_vcpu_map in synic_clear_sint_msg_pending since using
kvm_vcpu_gpa_to_page() and kmap() will only work for guest memory that has
a "struct page".

Signed-off-by: KarimAllah Ahmed <karah...@amazon.de>
---
v1 -> v2:
- Update to match the new API return codes
---
 arch/x86/kvm/hyperv.c | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index 01d209a..8bdc78d 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -158,26 +158,22 @@ static void synic_clear_sint_msg_pending(struct 
kvm_vcpu_hv_synic *synic,
                                        u32 sint)
 {
        struct kvm_vcpu *vcpu = synic_to_vcpu(synic);
-       struct page *page;
-       gpa_t gpa;
+       struct kvm_host_map map;
        struct hv_message *msg;
        struct hv_message_page *msg_page;
 
-       gpa = synic->msg_page & PAGE_MASK;
-       page = kvm_vcpu_gfn_to_page(vcpu, gpa >> PAGE_SHIFT);
-       if (is_error_page(page)) {
+       if (kvm_vcpu_map(vcpu, gpa_to_gfn(synic->msg_page), &map)) {
                vcpu_err(vcpu, "Hyper-V SynIC can't get msg page, gpa 0x%llx\n",
-                        gpa);
+                        synic->msg_page);
                return;
        }
-       msg_page = kmap_atomic(page);
 
+       msg_page = map.hva;
        msg = &msg_page->sint_message[sint];
        msg->header.message_flags.msg_pending = 0;
 
-       kunmap_atomic(msg_page);
-       kvm_release_page_dirty(page);
-       kvm_vcpu_mark_page_dirty(vcpu, gpa >> PAGE_SHIFT);
+       kvm_vcpu_unmap(&map);
+       kvm_vcpu_mark_page_dirty(vcpu, gpa_to_gfn(synic->msg_page));
 }
 
 static void kvm_hv_notify_acked_sint(struct kvm_vcpu *vcpu, u32 sint)
-- 
2.7.4