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| author | Ben Widawsky | 2022-04-29 16:40:49 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin | 2022-05-13 12:13:36 +0200 |
| commit | 2a3282c68ee21cd04ee9d9ef62549f1771929828 (patch) | |
| tree | 3a28870dd67907dd00f7e4795fe70eea7474d869 /hw/acpi/Kconfig | |
| parent | hw/cxl/component: Implement host bridge MMIO (8.2.5, table 142) (diff) | |
| download | qemu-2a3282c68ee21cd04ee9d9ef62549f1771929828.tar.gz qemu-2a3282c68ee21cd04ee9d9ef62549f1771929828.tar.xz qemu-2a3282c68ee21cd04ee9d9ef62549f1771929828.zip | |
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/Kconfig')
| -rw-r--r-- | hw/acpi/Kconfig | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/hw/acpi/Kconfig b/hw/acpi/Kconfig index 19caebde6c..3703aca212 100644 --- a/hw/acpi/Kconfig +++ b/hw/acpi/Kconfig @@ -5,6 +5,7 @@ config ACPI_X86 bool select ACPI select ACPI_NVDIMM + select ACPI_CXL select ACPI_CPU_HOTPLUG select ACPI_MEMORY_HOTPLUG select ACPI_HMAT @@ -66,3 +67,7 @@ config ACPI_ERST bool default y depends on ACPI && PCI + +config ACPI_CXL + bool + depends on ACPI |