[RFC 11/12] KVM/VMX: Use the new host mapping API for synic_deliver_msg

[KarimAllah Ahmed]

Cc: Paolo Bonzini <pbonz...@redhat.com>
Cc: Radim Krčmář <rkrc...@redhat.com>
Cc: k...@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: KarimAllah Ahmed <karah...@amazon.de>
---
 arch/x86/kvm/hyperv.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index 408428a..be6ce0e 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -563,7 +563,7 @@ static int synic_deliver_msg(struct kvm_vcpu_hv_synic 
*synic, u32 sint,
                             struct hv_message *src_msg)
 {
        struct kvm_vcpu *vcpu = synic_to_vcpu(synic);
-       struct page *page;
+       struct kvm_host_mapping mapping;
        gpa_t gpa;
        struct hv_message *dst_msg;
        int r;
@@ -573,11 +573,11 @@ static int synic_deliver_msg(struct kvm_vcpu_hv_synic 
*synic, u32 sint,
                return -ENOENT;
 
        gpa = synic->msg_page & PAGE_MASK;
-       page = kvm_vcpu_gfn_to_page(vcpu, gpa >> PAGE_SHIFT);
-       if (is_error_page(page))
+
+       if (!kvm_vcpu_gpa_to_host_mapping(vcpu, gpa, &mapping, true))
                return -EFAULT;
 
-       msg_page = kmap_atomic(page);
+       msg_page = mapping.kaddr;
        dst_msg = &msg_page->sint_message[sint];
        if (sync_cmpxchg(&dst_msg->header.message_type, HVMSG_NONE,
                         src_msg->header.message_type) != HVMSG_NONE) {
@@ -594,8 +594,8 @@ static int synic_deliver_msg(struct kvm_vcpu_hv_synic 
*synic, u32 sint,
                else if (r == 0)
                        r = -EFAULT;
        }
-       kunmap_atomic(msg_page);
-       kvm_release_page_dirty(page);
+
+       kvm_release_host_mapping(&mapping, true);
        kvm_vcpu_mark_page_dirty(vcpu, gpa >> PAGE_SHIFT);
        return r;
 }
-- 
2.7.4