linux-kernel - [PATCH v2 2/2] kvm: x86: move architecture specific code into kvm_arch_vcpu

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Message-Id: <146fab9b48eb8554202f91785d0e009757439baf.1628739116.git.houwenlong93@linux.alibaba.com>
Date:   Thu, 12 Aug 2021 12:02:20 +0800
From:   Hou Wenlong <houwenlong93@...ux.alibaba.com>
To:     kvm@...r.kernel.org
Cc:     Sean Christopherson <seanjc@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/2] kvm: x86: move architecture specific code into kvm_arch_vcpu_fault

The function kvm_arch_vcpu_fault can handle architecture specific
case, so move x86's pio_data hanlding into it.

Suggested-by: Sean Christopherson <seanjc@...gle.com>
Signed-off-by: Hou Wenlong <houwenlong93@...ux.alibaba.com>
---
 arch/x86/kvm/x86.c  | 2 ++
 virt/kvm/kvm_main.c | 4 ----
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 1e3bbe5cd33a..25c0752d6cd9 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5349,6 +5349,8 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
 
 struct page *kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
 {
+	if (vmf->pgoff == KVM_PIO_PAGE_OFFSET)
+		return virt_to_page(vcpu->arch.pio_data);
 	return NULL;
 }
 
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index f7d21418971b..43064df5ad87 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -3435,10 +3435,6 @@ static vm_fault_t kvm_vcpu_fault(struct vm_fault *vmf)
 
 	if (vmf->pgoff == 0)
 		page = virt_to_page(vcpu->run);
-#ifdef CONFIG_X86
-	else if (vmf->pgoff == KVM_PIO_PAGE_OFFSET)
-		page = virt_to_page(vcpu->arch.pio_data);
-#endif
 #ifdef CONFIG_KVM_MMIO
 	else if (vmf->pgoff == KVM_COALESCED_MMIO_PAGE_OFFSET)
 		page = virt_to_page(vcpu->kvm->coalesced_mmio_ring);
-- 
2.31.1