linux-kernel - [RFC 10/12] KVM/VMX: Use the new host mapping API for synic_clear_sint_msg

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Date:   Mon,  5 Feb 2018 19:47:29 +0100
From:   KarimAllah Ahmed <karahmed@...zon.de>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     KarimAllah Ahmed <karahmed@...zon.de>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>
Subject: [RFC 10/12] KVM/VMX: Use the new host mapping API for synic_clear_sint_msg_pending

Cc: Paolo Bonzini <pbonzini@...hat.com>
Cc: Radim Krčmář <rkrcmar@...hat.com>
Cc: kvm@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: KarimAllah Ahmed <karahmed@...zon.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 dc97f25..408428a 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -137,25 +137,25 @@ 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;
+	struct kvm_host_mapping mapping;
 	gpa_t gpa;
 	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_gpa_to_host_mapping(vcpu, gpa, &mapping, true)) {
 		vcpu_err(vcpu, "Hyper-V SynIC can't get msg page, gpa 0x%llx\n",
 			 gpa);
 		return;
 	}
-	msg_page = kmap_atomic(page);
+	msg_page = mapping.kaddr;
 
 	msg = &msg_page->sint_message[sint];
 	msg->header.message_flags.msg_pending = 0;
 
-	kunmap_atomic(msg_page);
-	kvm_release_page_dirty(page);
+	kvm_release_host_mapping(&mapping, true);
 	kvm_vcpu_mark_page_dirty(vcpu, gpa >> PAGE_SHIFT);
 }
 
-- 
2.7.4