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Subject[PATCH] KVM: nvmx: retry writing guest memory after page fault injected
Date
From: Miaohe Lin <linmiaohe@huawei.com>

We should retry writing guest memory when kvm_write_guest_virt_system()
failed and page fault is injected in handle_vmread().

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
---
arch/x86/kvm/vmx/nested.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 8edefdc9c0cb..c1ec9f25a417 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -4799,8 +4799,10 @@ static int handle_vmread(struct kvm_vcpu *vcpu)
instr_info, true, len, &gva))
return 1;
/* _system ok, nested_vmx_check_permission has verified cpl=0 */
- if (kvm_write_guest_virt_system(vcpu, gva, &value, len, &e))
+ if (kvm_write_guest_virt_system(vcpu, gva, &value, len, &e)) {
kvm_inject_page_fault(vcpu, &e);
+ return 1;
+ }
}

return nested_vmx_succeed(vcpu);
--
2.19.1
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