From: Julien Grall <julien.gr...@citrix.com>
The commit 258711 introduced MemoryRegion to replace ioport_region*
for ioport 80h and F0h.
A MemoryRegion needs to have both read and write callback otherwise a segfault
will occur when an access is made.
The previous behaviour of this both ioport is to return 0xffffffffffffffff.
So keep this behaviour.
Reported-by: Adam Lackorzynski <a...@os.inf.tu-dresden.de>
Signed-off-by: Julien Grall <julien.gr...@citrix.com>
Tested-by: Adam Lackorzynski <a...@os.inf.tu-dresden.de>
Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com>
---
hw/pc.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/hw/pc.c b/hw/pc.c
index df0c48e..90b1bf7 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -103,6 +103,11 @@ static void ioport80_write(void *opaque, hwaddr addr,
uint64_t data,
{
}
+static uint64_t ioport80_read(void *opaque, hwaddr addr, unsigned size)
+{
+ return 0xffffffffffffffff;
+}
+
/* MSDOS compatibility mode FPU exception support */
static qemu_irq ferr_irq;
@@ -123,6 +128,11 @@ static void ioportF0_write(void *opaque, hwaddr addr,
uint64_t data,
qemu_irq_lower(ferr_irq);
}
+static uint64_t ioportF0_read(void *opaque, hwaddr addr, unsigned size)
+{
+ return 0xffffffffffffffff;
+}
+
/* TSC handling */
uint64_t cpu_get_tsc(CPUX86State *env)
{
@@ -960,6 +970,7 @@ static void cpu_request_exit(void *opaque, int irq, int
level)
static const MemoryRegionOps ioport80_io_ops = {
.write = ioport80_write,
+ .read = ioport80_read,
.endianness = DEVICE_NATIVE_ENDIAN,
.impl = {
.min_access_size = 1,
@@ -969,6 +980,7 @@ static const MemoryRegionOps ioport80_io_ops = {
static const MemoryRegionOps ioportF0_io_ops = {
.write = ioportF0_write,
+ .read = ioportF0_read,
.endianness = DEVICE_NATIVE_ENDIAN,
.impl = {
.min_access_size = 1,
--
1.8.0.2
