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| author | Ben Widawsky <ben.widawsky@intel.com> | 2022-04-29 15:40:49 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2022-05-13 06:13:36 -0400 |
| commit | 2a3282c68ee21cd04ee9d9ef62549f1771929828 (patch) | |
| tree | 3a28870dd67907dd00f7e4795fe70eea7474d869 /hw/acpi/cxl-stub.c | |
| parent | 6e4e3ae936e6bc1501fc0d67444738cec7a1e78a (diff) | |
| download | qemu-2a3282c68ee21cd04ee9d9ef62549f1771929828.zip qemu-2a3282c68ee21cd04ee9d9ef62549f1771929828.tar.gz qemu-2a3282c68ee21cd04ee9d9ef62549f1771929828.tar.bz2 | |
acpi/cxl: Add _OSC implementation (9.14.2)
CXL 2.0 specification adds 2 new dwords to the existing _OSC definition
from PCIe. The new dwords are accessed with a new uuid. This
implementation supports what is in the specification.
iasl -d decodes the result of this patch as:
Name (SUPP, Zero)
Name (CTRL, Zero)
Name (SUPC, Zero)
Name (CTRC, Zero)
Method (_OSC, 4, NotSerialized) // _OSC: Operating System Capabilities
{
CreateDWordField (Arg3, Zero, CDW1)
If (((Arg0 == ToUUID ("33db4d5b-1ff7-401c-9657-7441c03dd766") /* PCI Host Bridge Device */) || (Arg0 == ToUUID ("68f2d50b-c469-4d8a-bd3d-941a103fd3fc") /* Unknown UUID */)))
{
CreateDWordField (Arg3, 0x04, CDW2)
CreateDWordField (Arg3, 0x08, CDW3)
Local0 = CDW3 /* \_SB_.PC0C._OSC.CDW3 */
Local0 &= 0x1F
If ((Arg1 != One))
{
CDW1 |= 0x08
}
If ((CDW3 != Local0))
{
CDW1 |= 0x10
}
SUPP = CDW2 /* \_SB_.PC0C._OSC.CDW2 */
CTRL = CDW3 /* \_SB_.PC0C._OSC.CDW3 */
CDW3 = Local0
If ((Arg0 == ToUUID ("68f2d50b-c469-4d8a-bd3d-941a103fd3fc") /* Unknown UUID */))
{
CreateDWordField (Arg3, 0x0C, CDW4)
CreateDWordField (Arg3, 0x10, CDW5)
SUPC = CDW4 /* \_SB_.PC0C._OSC.CDW4 */
CTRC = CDW5 /* \_SB_.PC0C._OSC.CDW5 */
CDW5 |= One
}
Return (Arg3)
}
Else
{
CDW1 |= 0x04
Return (Arg3)
}
Signed-off-by: Ben Widawsky <ben.widawsky@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Message-Id: <20220429144110.25167-25-Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/acpi/cxl-stub.c')
| -rw-r--r-- | hw/acpi/cxl-stub.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/hw/acpi/cxl-stub.c b/hw/acpi/cxl-stub.c new file mode 100644 index 0000000..15bc210 --- /dev/null +++ b/hw/acpi/cxl-stub.c @@ -0,0 +1,12 @@ + +/* + * Stubs for ACPI platforms that don't support CXl + */ +#include "qemu/osdep.h" +#include "hw/acpi/aml-build.h" +#include "hw/acpi/cxl.h" + +void build_cxl_osc_method(Aml *dev) +{ + g_assert_not_reached(); +} |