KVM: nSVM: Set correct port for IOIO interception evaluation

Obtaining the port number from DX is bogus as a) there are immediate
port accesses and b) user space may have changed the register content
while processing the PIO access. Forward the correct value from the
instruction emulator instead.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 1824949821f9..85d4458a0b35 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -4256,13 +4256,13 @@ static int svm_check_intercept(struct kvm_vcpu *vcpu,
                 u64 exit_info;
                 u32 bytes;
 
-                exit_info = (vcpu->arch.regs[VCPU_REGS_RDX] & 0xffff) << 16;
-
                 if (info->intercept == x86_intercept_in ||
                     info->intercept == x86_intercept_ins) {
-                        exit_info |= SVM_IOIO_TYPE_MASK;
+                        exit_info = ((info->src_val & 0xffff) << 16) |
+                                SVM_IOIO_TYPE_MASK;
                         bytes = info->dst_bytes;
                 } else {
+                        exit_info = (info->dst_val & 0xffff) << 16;
                         bytes = info->src_bytes;
                 }