Dump KVM_EXIT_IO details

When KVM_RUN returns with KVM_EXIT_IO, dump the I/O details and exit.

Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>

diff --git a/tools/kvm/kvm.c b/tools/kvm/kvm.c
index fac42f250d64862e7057001e2dfaa75e251b4040..c245dfd2f982c5b58fe2962eec9a42eda1c061f6 100644 (file)
--- a/tools/kvm/kvm.c
+++ b/tools/kvm/kvm.c
@@ -282,6 +282,24 @@ static void kvm__reset_vcpu(struct kvm *self, uint64_t rip)
        self->regs.rflags       = 0x0000000000000002ULL;
 }
 
+static void kvm__emulate_io_out(struct kvm *self, uint16_t port, void *data, int size, uint32_t count)
+{
+       fprintf(stderr, "%s port=%x, size=%d, count=%" PRIu32 "\n", __func__, port, size, count);
+}
+
+static void kvm__emulate_io_in(struct kvm *self, uint16_t port, void *data, int size, uint32_t count)
+{
+       fprintf(stderr, "%s port=%x, size=%d, count=%" PRIu32 "\n", __func__, port, size, count);
+}
+
+static void kvm__emulate_io(struct kvm *self, uint16_t port, void *data, int direction, int size, uint32_t count)
+{
+       if (direction == KVM_EXIT_IO_IN)
+               kvm__emulate_io_in(self, port, data, size, count);
+       else
+               kvm__emulate_io_out(self, port, data, size, count);
+}
+
 int main(int argc, char *argv[])
 {
        const char *kernel_filename;
@@ -300,8 +318,25 @@ int main(int argc, char *argv[])
 
        kvm__reset_vcpu(kvm, kernel_start);
 
-       kvm__run(kvm);
+       for (;;) {
+               kvm__run(kvm);
+
+               switch (kvm->kvm_run->exit_reason) {
+               case KVM_EXIT_IO:
+                       kvm__emulate_io(kvm,
+                                       kvm->kvm_run->io.port,
+                                       (uint8_t *)kvm->kvm_run + kvm->kvm_run->io.data_offset,
+                                       kvm->kvm_run->io.direction,
+                                       kvm->kvm_run->io.size,
+                                       kvm->kvm_run->io.count);
+                       goto exit_kvm;
+                       break;
+               default:
+                       goto exit_kvm;
+               }
+       }
 
+exit_kvm:
        fprintf(stderr, "KVM exit reason: %" PRIu32 " (\"%s\")\n",
                kvm->kvm_run->exit_reason, exit_reasons[kvm->kvm_run->exit_reason]);