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[PULL,29/60] hw/char/serial-isa: Implement relocation and enabling/disabling for TYPE_ISA_SERIAL

Message ID 7812dbc54c72f71df2644d0cec52a1e8d6b19584.1707909001.git.mst@redhat.com
State New
Headers show
Series [PULL,01/60] virtio: split into vhost-user-base and vhost-user-device | expand

Commit Message

Michael S. Tsirkin Feb. 14, 2024, 11:14 a.m. UTC 
From: Bernhard Beschow <shentey@gmail.com>

The real SuperI/O chips emulated by QEMU allow for relocating and enabling or
disabling their SuperI/O functions via software. So far this is not implemented.
Prepare for that by adding isa_serial_set_{enabled,iobase}.

Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Message-Id: <20240114123911.4877-9-shentey@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/hw/char/serial.h |  2 ++
 hw/char/serial-isa.c     | 14 ++++++++++++++
 2 files changed, 16 insertions(+)
diff mbox series

Patch

diff --git a/include/hw/char/serial.h b/include/hw/char/serial.h
index 8ba7eca3d6..6e14099ee7 100644
--- a/include/hw/char/serial.h
+++ b/include/hw/char/serial.h
@@ -112,5 +112,7 @@  SerialMM *serial_mm_init(MemoryRegion *address_space,
 
 #define TYPE_ISA_SERIAL "isa-serial"
 void serial_hds_isa_init(ISABus *bus, int from, int to);
+void isa_serial_set_iobase(ISADevice *serial, hwaddr iobase);
+void isa_serial_set_enabled(ISADevice *serial, bool enabled);
 
 #endif
diff --git a/hw/char/serial-isa.c b/hw/char/serial-isa.c
index 1c793b20f7..329b352b9a 100644
--- a/hw/char/serial-isa.c
+++ b/hw/char/serial-isa.c
@@ -184,3 +184,17 @@  void serial_hds_isa_init(ISABus *bus, int from, int to)
         }
     }
 }
+
+void isa_serial_set_iobase(ISADevice *serial, hwaddr iobase)
+{
+    ISASerialState *s = ISA_SERIAL(serial);
+
+    serial->ioport_id = iobase;
+    s->iobase = iobase;
+    memory_region_set_address(&s->state.io, s->iobase);
+}
+
+void isa_serial_set_enabled(ISADevice *serial, bool enabled)
+{
+    memory_region_set_enabled(&ISA_SERIAL(serial)->state.io, enabled);
+}