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hw/cxl/cxl-host: Fix segmentation fault when getting cxl-fmw property

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QEMU crashes (Segmentation fault) when getting cxl-fmw property via
qmp:

(QEMU) qom-get path=machine property=cxl-fmw

This issue is caused by accessing wrong callback (opaque) type in
machine_get_cfmw().

cxl_machine_init() sets the callback as `CXLState *` type but
machine_get_cfmw() treats the callback as
`CXLFixedMemoryWindowOptionsList **`.

Fix this error by casting opaque to `CXLState *` type in
machine_get_cfmw().

Fixes: 03b39fcf64bc ("hw/cxl: Make the CXL fixed memory window setup a machine parameter.")
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Li Zhijian <lizhijian@fujitsu.com>
Reviewed-by: Xingtao Yao <yaoxt.fnst@fujitsu.com>
Link: https://lore.kernel.org/r/20240704093404.1848132-1-zhao1.liu@linux.intel.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Message-Id: <20240705113956.941732-2-Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Zhao Liu 2024-07-05 12:39:54 +01:00 committed by Michael S. Tsirkin
parent 9de2049c95
commit a207d5f87d
1 changed files with 2 additions and 1 deletions
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3
hw/cxl/cxl-host.c
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@ -315,7 +315,8 @@ static void machine_set_cxl(Object *obj, Visitor *v, const char *name,
static void machine_get_cfmw(Object *obj, Visitor *v, const char *name, static void machine_get_cfmw(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp) void *opaque, Error **errp)
{ {
CXLFixedMemoryWindowOptionsList **list = opaque; CXLState *state = opaque;
CXLFixedMemoryWindowOptionsList **list = &state->cfmw_list;
visit_type_CXLFixedMemoryWindowOptionsList(v, name, list, errp); visit_type_CXLFixedMemoryWindowOptionsList(v, name, list, errp);
} }