diff mbox series

[WIP,v2,06/14] KVM: x86: Implement memory fault exit for kvm_handle_page_fault

Message ID 20230315021738.1151386-7-amoorthy@google.com (mailing list archive)
State New, archived
Headers show
Series Avoiding slow get-user-pages via memory fault exit | expand

Commit Message

Anish Moorthy March 15, 2023, 2:17 a.m. UTC 
---
 arch/x86/kvm/mmu/mmu.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
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Patch

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 0b02e2c360c08..5e0140db384f6 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -4375,7 +4375,9 @@  int kvm_handle_page_fault(struct kvm_vcpu *vcpu, u64 error_code,
 #ifndef CONFIG_X86_64
 	/* A 64-bit CR2 should be impossible on 32-bit KVM. */
 	if (WARN_ON_ONCE(fault_address >> 32))
-		return -EFAULT;
+		return kvm_mefault_exit_or_efault(
+			vcpu, fault_address, PAGE_SIZE,
+			KVM_MEMFAULT_REASON_UNKNOWN);
 #endif
 
 	vcpu->arch.l1tf_flush_l1d = true;